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Патент USA US2408760

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0a. 8, 1946.
‘ 2,408,759’
J. DUNLOP
DECK-EDGE ELEVATQR
Filed Dec. s, 1945
6' Sheets-Sheet 1 '
INVENTOR
W H N E SS E S
J'amesDun/op.
- /
ATéQRNEY I
I
Oct. 8, 1946.4
'
.
DECK-EDGE ELEVATOR
Filed Dec. 6, 1945 _I
IBM
2,408,759
J. DUNLOP
6 Sheets-Sheet 4
B
//
,
AT
RNEY
’ Oct. 8,1946.
J. DUNLOP - S
'
I
2,408,759
DECK-EDGE ELEVATOR
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INVENTOR
Oct. 8, 1946.
J. DUNLOP
,
2,408,759 " I
DECK-EDGE ELEVATOR
Filed Dec. 6_, 1945
WITNESSES:
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6 Sheets-Sheet 6
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Patented Oct. 8, 1946
1.:
2,408,759
UNITED i ‘STATES PATENT. OFFICE
James Dunlop, Ridgewood, N. J., assignor, by
mesne assignments, to Westinghouse Electric ~ J
Corporation, East Pittsburgh, Pa_., a
of Pennsylvania
corporation ,
Application December 6, 1943,.Serial No. 513,029
7119 Claims. (Ci. 1‘87—6)
~
7
1
2
platform folded and raised to its stowing posi-w
tion;
Fig. 5 is a top plan view of one pair of the
guiding rollers mounted in the edge of the ?ight
deck in their activeposition for guiding the edge
of the folded part of the platform of the ele
My improvement relates to deck-edge elevators
and, more particularly, to means for folding and
stowing the platforms of such elevators.
Where deck-edge elevators are used on air
plane-carrier ships for transferring airplanes
from one deck to another, they are‘mounted'on
vator in a stowing operationj
'
the outer side of the ship in alignment with an
Fig. 6 is a View taken on the line VI—VI>of
opening therein to the main deck and are mov
able up and down on the side of the ships to
Fig. 7 is atop plan-view of the guiding rollers
serve the main decks and the ?ight decks. A 10
Fig. 5;
Fig. 8~is a view taken on the line VIII-VIII
of Fig. ,‘7 with the cover‘ raised and with one ,
crank arm in its high position;
Fig. 9 is a View taken on the line I; --,IX of
take up a small amount‘ of room on the side of
Fig. 7;
‘ d J
‘
Fig.~ 10>is a view‘ taken on the line X-X of
the ship well above‘ its waterline and thereby
permit it to pass through narrow; openings.
Another object is to provide a means for fold
Fig. '7 illustrating an- arm and lever for opening
a switch to prevent operation of the stowing and
snubbing Winches, while the guide rollers are not
ing a deck-edge elevator against the side, of a
ship and to raise the folded platform into a high
position on the side of the ship so that it will be
in a-stowed position out of the way of the walls
of any look through which the ship may pass.
~
in position for service;
7
r
Fig. 11 is a view similar to Fig. 2lwith 'stowing
struts substituted for the Snubbing cables; and
Fig. 12 is a view'similar to Fig. 4 ‘with stowing
struts substituted for the snubbing cables,
4 A further object is to provide a mechanism and
30
control system for effecting the raising and stow
.
Referring more particularly to Figs. 1, 2, 3 and
44, I have illustrated a deck-edge. elevator com-,
ing of a deck-edge elevator platform without ren
dering it liable to injury due to the effect of wind
or wave upon the surface of ‘the platform or. to
any rolling of the ship on which the elevator is
'
'
the rollers and walls around it being shown in
‘
.
_
I cross-section;
One object of my invention is to provide ‘a deck-w
edge elevator in which the platform may be easily
folded, raised and stowed in such position as to’
mounted.
. I
illustrated in Fig. 5, the casing in which they
are mounted and the; mechanism for operating
them, the cover plate being removed and one of
deck-edge elevator of this type is ‘very large and
extends ‘outwardly fromrtheship hull to such an
extent "as to prevent the ship on which ‘it'is
mounted from going through narrow openings
through which it could easily pass if it were‘ not
for the elevator.
'
prising anjelevator platform I!) disposed between
a pair of guide rails II and I2 mounted on the
outer side of’ a ship hull l3 by a plurality of
brackets 14 for serving a main deck I5 and a
'
?ight deck 16. A plurality of rollers
mounted ‘on the ends of the platform in'posi
tion to. engageve'rtical guiding slots/l8 and [8a
anism which may be easily and inexpensively
in the sides ofv the guide rails facing each other
manufactured, installed, ‘operated and‘ main-v
for guiding the platform as it is raised or low
40
tained in operation. _
'
ered and for maintaining its base in right-angle
For a better understanding of 'my invention,
relationto the hull of the ship.
reference may be had to the accompanying draw
A plurality of hoisting cables [9 and-20 oper-v
ings in which:
»
‘
It'is also an objectof my invention to provide
a deck-edge elevator folding and stowing, mech
ated by a hydraulic hoisting‘engine 2| are pro-.
‘Figure l is a top plan view of my improved’,
deck-edge elevator with part ofthe upper deck 45 vided for supporting the platform and for rais- '
ing and lowering it. The hydraulic. engine com
cut awayto disclose the hoisting and stowing ap
paratus;
v
,
.
‘
Fig, 2 is a diagrammatic representation in end
elevation of the deck-edge elevator illustrated in.
prises a singlecylinder 22vmounted in a horizon-v
tal position on a frame orengine bed 23 and
a power plunger 24 disposed in the cylinder. The
Fig. 1, with the elevator in position to be stowed‘ 50. outer end of the plunger is provided with a power,
head 2.5, in which a pair ‘of powerjsheaves 25 are
and with itsnormal lowermost position indicated '
by dotted lines;
.
Fig. 3 is similar to Fig. 2,. with the
platform in a partially folded position;
rotatably mounted. ‘In ‘operation, .the plunger
elevator
,
.\Fig._ 4 is alviewlsimilar to Fig. 2,‘ with‘ the
" 55
moves‘ back and forth horizontally and thus
moves the .powersheaves back and forth with it,
thereby operating the hoisting cables to raise
2,408,759
4
and lower the platform. The plunger is designed
for operation by a suitable hydraulic medium,
such as oil, placed under pressure by any suitable
equipment (not shown), and is controlled by a
valve 2‘! operated by a valve motor 21a through
a gear box 211).
jecting face 39a to receive a downwardly reced
ing face 46a on the folding platform section be
low the hinged joint and thereby form a ?rm
seat for the outboard section 49 which will help
support it when it is in its horizontal position.
A hand-operative device 210
A plurality of bolts 42 may be used to connect
the adjacent faces into a structurally integral
when it is desired to use hand control instead of
frame when the platform is in normal use and
motor control for the engine. The hand drive
a plate Ma is disposed over the hinge 4| to pro
box is so arranged that opening its cover for op 10 vide a smooth tracking surface for the airplanes
is provided for controlling the valve 21 by hand
eration disconnects the motor and mechanically
when they move thereon. The plate Ma and the
connects the hand drive gears for operating the
valve. When the hand box is closed, the hand
wheel is disengaged and the motor is again elec
bolts 42 are removed when the platform is to be
stowed.
'
Each of the guide rails H and i2 is provided
trically connected for operation.
15 with an upwardly slanted tooth 48 in position to
The cables I9 are secured to the aft end of the
be engaged by a stowing pawl 49 to hold the ele
platform (Fig. 4) by suitable hitches 23 mounted
vator safely and ?rmly in its stowed position after
thereon and pass upwardly and over an idler
it is moved thereto. The pawls 49 are provided
sheave 29 fastened to the ship structure under
with suitable weights 5! for biasing them into
neath the overhanging portion of the flight deck,
position to engage the teeth 48 so that they will
thence rearwardly over a second idler sheave 39
slide over the teeth when the elevator is moved
mounted on the ship frame inside the hull, thence
up to its ?nal stowing position and then catch
downwardly and under a de?ector sheave 3|
mounted on the engine bed 23, thence around a
stationary sheave 32 mounted on the engine bed
at the rear of the engine, thence around one of
the power sheaves 26, and thence to a plurality
of hitches mounted on the underside of the en
gine cylinder but not shown in the drawings.
The hoisting cables 20 at the fore end of the
platform are secured to the platform by suitable
cable hitches 35 mounted thereon and pass up
wardly and over an idler sheave 35 fastened to
the ship structure underneath the overhanging
on the teeth as the elevator comes to rest and
hold it ?rmly in its stowed position. Bolts 52
may be provided for holding the pawls 49 out
of their tooth engaging position while the ele
vator is in normal operation.
Each of the guide rails is also provided with
an upwardly slanting tooth 53 in position to be
engaged by the stowing pawls 49 when it is de
sired to raise the platform slightly and rest it
temporarily in a stationary position which will
permit the attendants to have ready access to
certain parts of the elevator in preparing it for
portion of the ?ight deck, thence rearwardly over 35 stowing operation.
a second idler sheave 36 mounted on the ship
Each of the guide rails is further provided with
frame inside the hull, and thence downwardly
a downwardly slanting tooth 54 at the limit of
and under a de?ector sheave 31 mounted on
normal up travel of the platform in position to
the right-hand end of the engine bed, thence
be engaged by a limit pawl 55 on the base section
under and over one of the power sheaves 26 in 40 of the elevator. A spring 55a, is provided for
the plunger head, and thence to suitable dead
biasing the pawl 55 into position to engage the
end hitches 58 secured to the upper rear part of
tooth 54 when the platform reaches the upper
the engine.
limit to which it is normally raised and thereby
Normally, the platform It! remains in its hori
provide a safety means for preventing over-rais
zontal position on the side of the ship during ; ing of the elevator.
practically all of the activities of the ship. At
A pair of stowing cables 56 and 51 and a winch
58 are provided for raising or folding the out
times, however, it is necessary for the ship to
pass through very narrow waterways or the
board section 49 when the elevator platform is
locks of canals which are too narrow to admit
to be stowed high on the side of the ship. The
the ship with the elevator platform riding in its
stowing cable 56 has its inner end secured to a
normal horizontal position on the side of the
ship. This will be understood when it is realized
that some deck-edge elevator platforms extend
outwardly from the ship for a distance of thirty
four feet. Therefore, in order to permit the stow
ing of the elevator so that it will not prevent the
ship from moving through narrow places, I have
constructed the platform as a base section 39
winding drum 59 on the winch 58 and then passes
over that drum, under an idler sheave 90, around
an idler sheave El (Fig. 1) and over a de?ecting
sheave 62 to a shackle 63 by means of which it
> may be connected to or disconnected from the
outer edge of the-folding platform near the left
hand end thereof.
The stowing cable 5‘! is fastened at its inner
end to the hoisting drum 59 of the winch 58 and
and an outboard section 40 attached thereto by
a hinged joint 4! and a stowing means for fold (1-0 then passes over that drum, over an idler sheave
ing the outboard section into a vertical position
65, around a deflecting sheave 65 and over a
parallel with its side of the ship and for then
sheave 61 to a shackle 68 by means of which it
raising both sections as a unit high above the
may be easily attached to or detached from the
water line of the ship.
outer edge of the platform near its right-hand
The base section 39 is constructed of high “ end. With this construction, the rotation of the
tensile steel tubing, structural steel and steel
drum in one direction will maintain an equal
plate welded together in bridge-like construction
pull on the hoisting cables 56 and 51 to raise the
to form a relatively light, but strong, frame upon
outer end of the outboard section 48, so that it
which any suitable ?ooring 44 may be laid. The
pivots around its hinge joint 4| and moves into
outboard section 40 is provided with a" suitable
flooring 45 mounted upon a frame 46 constructed
approximately a vertical position.
The drum 59 on the winch 58 is connected by
of high tensile steel tubing, structural steel and
suitable speed reducing gears and pinions 10, ll,
steel plate welded together in bridge-like con
12, 13, 14 and 75 to a two-speed motor 16, the
struction. The lower outboard face of the base
operation of which may be controlled by suitable
section 39 is constructed with an outwardly pro 75 switching means mounted in a control station 18
2,408,759
‘
5
6
rlght-hand-end .0: theelevator and ?ush with
disposed in va convenient position on the main
deck I5. ~ A suitable brake ‘I1 is mounted on the
the‘surface of the deck."
motor ‘I6 for holding‘it in any desired position.
position approximately above‘ the ‘joint 4| (Fig.
Thewinch 58 and its motor ‘I6 are mounted in
side the ship on a suitable platform ‘I9 attached
' Inasmuch as the folding section 40 is very large
'
serve as a stop and guide at the inner face of.
the platform edge IIO of the folding platform'
(Figs; 5‘ and 6) and the roller I06 will serve' as a
10
lock and guide for the opposite‘side of the edge
member H0 and both rollers thus serve to posi
tion and guide the platform in its vertical move
by cause the folding section to move upwardly
and inwardly faster than the'raising action of
the stowing cables with the effect of slamming it
against the side of the ship with damaging effect.
ment. Normally in a deck-edge elevator of this
size the clearance between the rollers and the
edge element of the‘folding platformwil'l be ap
proximately one and one-eighth inches, to take
Therefore, I have provided a dragging or snub
bing means to cooperate with the stowing cables
in positively controlling the movement of the
folding platform when it is being moved from
care of warpage or unequal length of the stow-3
lug cables.
from its vertical to its horizontal position during
roller I05 and the edge portion when the plat
stowing operations.
form is lifted to its stowed position, to take up
nearly all the clearance so that a safe and. sub
stantial fastening will be made to the platform
in its-.?nal stowed position. At the aft edge of
the folding platform, a similar .cam and the
rollers I03 and I04 will guide the platform in the
The snubbing means comprises a snubbing
winch‘ 80 and a pair of snubbing cables 8| and 82
The winch 80 is mounted ‘on -
the platform ‘I9 adjacent to the stowing winch
58. The snubbing cable 8| is fastened at its in
ner end to a drum 83 on the winch 80 and passes
over that drum, under an idler sheave 84, over
an idler sheave 85, under an idler sheave 86 and
an idler sheave 81 to a shackle 88 by- means of
which it may be connected to or disconnected
from the lower edge of the outboard ‘section
Therefore, a cam III . is'secured to,
the inner face of the edge portion, I I0 ata point
which will cause it to be introduced between the
its horizontal position to its vertical position or '
operated thereby.
e
1) so that, when the rollers/I05 ‘and I05 are in
(possibly as much as 26 feet wide and 60 feet
the wind or waves may at times exert consider-,
able force during a stowing operation and there
-
their outermost position and the folding plat
formlis in its vertical position the roller I05 will
to the frame of the ship.
long), it presents a very large area against which
I
The casing I09 is mounted in the flight deck- in
samemanner.
so
frame 46 at the joint III and near the left-hand '
end of the frame.
The snubbing cable 82 is fastened at its inner,
end to the drum 83 and passes over it, over an
idler sheave 90, over an idler sheave 9|, under an
_
. ..
1:
In starting a stowing operation the guide roll-'
ers I03 and I05 are ?rst movedto their outer po
sition, the folding platform is then raised against
them so thatlthey act as" stopping rollers and
. then the guide rollers I04 and I06 are moved
outwardly to act as looking rollers to prevent the
folding vplatform from moving outwardly.
.
I
The casing I09 for ‘the guide rollers I05’ and
I06 comprises a box-like casting (Figs. 7, 8, 9 and
10) ‘provided with a flange I I 3_by means of which‘
idler sheave 92 and an idler sheave 93 to a
it
may be secured in its working position; A
shackle 94 by means of which it may be con 40 cover. plate I14 hinged on pins I Illa is provided
nected to or disconnected from the lower edge of
for protecting the contents of the‘casing when
the outboard section frame 46 at the joint 4| and
not inuse. .When the cover is closed, it lies in a
near the right-hand end of the frame.
depressionindioated by the line II4b, Fig. .9.
The drum 83 is connected for operation by‘ a
L; The roller I05 isrotatably mounted on the neck
reducing
gears
and
~
snubbing motor 96 through
H5 of- a cylindrical shaft or body H6 by a disc
pinions 91, 98, 99 and I00.v A suitable brake IN
II'I». held in position by a pair of machine screws
is mounted on the motor 96 to hold it in any de
i I8. ,The body H6 is slidably disposed in a sleeve,
sired position. The snubbing motor 96 may bev
I20 mounted in'the casing I09 by means of a press
any suitable torque motor the torque of_which
. ?t. A, shaft guide I I9 is, mounted by a plurality
may be increased when desired and it may be
of screws ‘I I9a-on the casing in position to extend
controlled by a suitable switching means disposed
into; an axial slot H92) ,in the shaft II6 for pre
at the control station ‘I8 on the main deck. ‘The
venting rotation of the shaft and for limiting its
winch and the motor are mounted‘ on’ the plat
out movement-when it is operated to move the
form "I9 in the rear of the ‘stowing winch 58;
A suitable cat-walk indicated by the line I02"
is disposed at each end of the platform base to
enable attendants to remove the bolts 42 and 52
to release the folding platform and the pawls 49
upon preparing to start a stowing operation of.
the platform and replace them when returning
the platform to its normal position after it has
been in stowed condition. .
A pair of guiding rollers I03 and I04 are pro
vided in the edge of the ?ight deck adjacent-to
the left-hand end of the platform and .a pair of
guiding rollers I05 and. I06 are ‘provided in the
edge of the ?ight deck adjacent to the right
hand of the platform (Fig. 1) for guiding the
folding platform during its vertical movements.
The rollers I03 and I04 are slidably disposed in a
casing I08 mounted in the'deck edge and flush
therewith at the left-hand end of the elevator.
The rollers I05-and I06 are slidably disposed in
a casing I09 mounted’ in the ?ightdeck iatithe;
~ 1 guidefrol'lerinto and out of the casing.
In order ‘that the roller I05 may be moved in
wardly and outwardly, easily, a shank‘ member
I2_Ij (Figs. ‘6, '7 and 8) is-bolted to the rear end of
the, body He by bolts H2 and provided in its one
sidewith a plurality of gear teeth I22, in position
to engage'a gearwheel I23 ?xed on a vertical
shaft I24 rotatably mounted in the casing for
_ operation by’ a crank arm I25 having a handle;
I126. The handlel~26 is slidably disposed in the
‘1 crank arm and provided with an enlarged head
iizl-gby means of which it may be seized and pulled
upwardly when it; is desired to'use it to operate
the‘ crank. ‘ An enlarged butt portion ,IZ‘Ia pre
vents it from being pulledout of the crank arm.
The roller'IilB is similarly-mounted on a [body
I28 provided with a shank member, I29‘ which.
extends; re'arwardly and is provided with gear
teeth I30 disposed to be pengagedbya gear wheel
I31!’ , ?xedpn a ‘vertical ;_shaft»-;I32 rotatably
mountedzin the casing I09. Agorank arm I3; is
7
2,408,759;
?xed on the outer end of the shaft I 32., A handle
I34 similar to the handle I21 is slidably disposed
in the outer end of the crank arm I33 by means of
which it may be raised to operate the crank arm.
A locking block or projection I35 extends upward-_
ly from the bottom of the casing and is provided
shanks on the guide rollers I05 and I06, a- bell
crank lever I5I operated by the floating ‘lever,
and a crank arm I52 operated by the bell crank
lever for operating the switch arm I41. The
5
floating lever I 50 is loosely seated upon a pair of
projections I54 and I55 extending upwardly from
with two holes I30 and I31 into which the lower
the bottom of the casing. The ends of the ?oat
ends of the sliding handles may be dropped when
ing love;- are bent downwardly and disposed in
the guide rollers are in their non-use position in
engagement with the rear ends of the shanks I29
the casing. The projection with the holes serves 10 and I2I attached to the guide rollers I05 and
to hold the operating arms and the rollers in their
I06, so that movement of either one or both of
retired position and prevent the rollers from mov
the shanks will cause a corresponding movement
ing outwardly until the handles are withdrawn
of the ?oating lever.
from the holes foruse in rotating the crank arms.
A hearing pin I51 for the bell crank I5I ex
Similarly, two holes I35a and I31d are provided
tends upwardly from projection I55 on the base
in the casing into which the sliding handles may
I09 through a lateral slot I58 in the floating le
be dropped when the crank arms are moved to
ver. The slot I58 is of such size that its sides
their outer positions so that the guide rollers may
will not touch the pin at any time. The bell
thereby be locked in their outermost positions.
crank lever I5! rests on the floating lever with
It is necessary for the guide roller operating ap
its hub on the pin I51 and with the outer end
paratus to lie beneath the level of the ?ight deck
of its arm I59 connected to the ?oating lever
while not in use, and yet become available for op
by a pivot pin I80; whereby rearward or forward
eration by the attendants on the flight deck when
movement of the ?oating lever causes a corre
a stowing operation is to be made. For this rea
sponding movement of the bell crank on its pin
son, the handles I26 and I34 are slidably mounted
and thus moves its arm I 66 for operating the
in the arms I25 and E33, so that they may be
crank arm I52 to rotate the switch arm I41.
raised out of their holes I35 and I31 in the pro
A compression spring I 63 is provided for bi
jection I35 when it is desired to turn the cranks
asing the switch arm I41 and the crank arm I52
and the crank arms are caused to move upwardly
to open switch position, and to also bias the bell
out'of the casing so that they will clear the sur 30 crank lever to keep the floating lever in constant
rounding mechanism as they start to rotate.
engagement with the shanks on the guide rollers,
Therefore, the base of the crank arm I25 is
regardless of the position of the guide rollers.
provided with a cylindrical tooth like downward
The spring I 63 is mounted between a lug I64 on
projection I38 concentric with the shaft I24, and
the crank arm I52 and a lug I55 mounted in a
having a cam surface I39 on its lower face dis
support l65 attached to the casing. The lug IE5
posed to engage a cooperating cam surface I40 on
is provided with a screw-threaded shank and nut
a cylindrical-like body I4I which is concentric
E01 by means of which its position in the sup
with the shaft I24 and which is moulded on a
port I06 may be adjusted to place the spring I63
base support I42 secured to the casing I09 by a
under such compression as is necessary to bias
plurality of bolts I43. It will be observed that the k the switch operating mechanism to its open switch
gear wheel I23 is of less width than the gear teeth
position, so that the switch will open when either
122 on the shank I2I, so that, as rotation of the
or both guide rollers are moved outwardly for
cam face I39 by the crank arm I29 lifts the shaft
starting a stowing operation. The guide rollers
I24 and the crank arm, the gear wheel I23 may
I 03 and £04 are provided with a similar operating
slide upwardly on the gear teeth I22. The cam
mechanism and switch.
surfaces I39 and I40 are of such shape that the
A bumper block I69 for acting as a bumper to
crank mechanism will rise sufficently to- clear the
limit the fore movement of the folding platform
edge of the box by the time it moves in counter
when it is between the guide rollers is mounted
clockwise direction (Fig. 7) to the side of the box.
in the central portion of the casing I09 by means
Each of the crank arms for the guide rollers is 50 of a'bolt £10 in position adjacent to the edge I l I
provided with a similar cam mechanism to raise it
of the folding platform. A plurality of shims I 'II
out of‘ the box as it is operated to move its roller
are disposed back of the bumper block for the
outwardly. The weight of the crank mechanism
purpose of adjusting its position relative to the
will cause it to return to its position in the cas
platform. The clearance between the bumper
ing a; it is operated to return its guide roller to 55 and the edge of the platform must be held to
its inner position in the casing or it maybe pushed
rather perfect dimensions, and shims such as
down by hand.
‘
those shown should be used to secure exactly the
A switch box I45 (Figs. 8, 9 and 10) is mounted
predetermined clearance. A similar bumper
on the central ?oor portion of the casing and pro
block is mounted in a similar manner in the cas
vided with a switch arm I41 by which a switch 60 in I08 for the guide rollers 503 and H34 at the
in the box may be operated to open a portion of
aft end of the elevator (Fig. l) for limiting the
the control circuit to prevent operation of the
movement of the folding platform at that end of
valve motor 21a to operate the valve on the hy
the elevator while it is in its vertical position. '
draulic engine when any one of the guide rollers
The control station 18 is provided with a main
is in position for starting a stowing operation; 65 master controller I14 for connecting the control
that is, the main valve motor can not be used un
station to the main control circuit, a stowing
less all of the guide rollers are in their retired
controller £15 for controlling the stowing motor
positions and will offer no obstruction to the
15, a snubber controller E15 for controlling the
normal operation of the elevator. The cover
snubber motor 96, a master controller I11 for
I45a is fastened on the switch box by a pair of 70 conditioning the 'stowing controller and the snub
bolts I 58 and a waterproof gasket MM is dis
ber controller to operate individually or to pre
posed between the cover and the box to prevent
vent their individual operation and connect them
the entry of moisture into the box.
for simultaneous operation by means of a com
The means for operating the switch arm I41
bination controller E18. The hand control 210'
comprises a floating lever I50 operated by the 75 provided with a handle I15 is also mounted on the
2,408,759
wardly and with itthe body. I I5 mounted on the
shank and the roller I05 mounted on the body.
'When the arm I25 reaches its'?nal out position,
the roller I05 is in its outermost position and
21 by hand when his desired‘ to operatelitin
that manner instead of by using thevalve motor
21a.v
.
.
‘
.
‘
, The control system, for the stowing motor and
10
teeth I22 and thereby move the shank I2I out
control station 18 for operating the engine valve
' ready for service, ?rst as a stopping roller as the
:theisnubbing motor also includes a limit switch
‘platform 40 reaches its vertical position and then
'I8I mounted on the stowing winch 58 and a limit
as a guide roller‘ for the right-hand end of the
switch I82 mounted .on the snubbing winch 50
. elevator platform 40 (Fig. 1) as it moves ver
(Fig.1). The limit switch IBI may beconnected
tically;- In like manner, the attendant adjacent
in any suitable manner to the operated mech 10 the guiding rollers I03 and I04 at the opposite
anism for the drum 59-as by a pinion I83 dis
end of the platform operates the mechanism
posed inmeshwiththe gear wheels 10 or by any
for the guide roller I03 to move it outwardly into
suitable sprocket and chain attachment so that
its stopping and guiding position.
, .
it will be operated to change the stowing motor
s The outward movement of the shank I2I, while
from its high speed. to its low speed when the
theroller IE5 is being placed in service as a guide
stowing winch has pulledthe platform to within
releases the ?oating lever I50 to move forward
folded
positoin.
The
.a. few inches ofits ?nal
with the shank and thus operate the arm I59
stowing motor remains energized after the fold
on the bell crank I5I to move its arm I6I away
ing ‘platform is brought to rest against the inner
from the switch crank arm I52, so that the en
guide rollers. This serves to prevent bounce or 20 ergy stored in the compression spring I63 now
pounding and facilitates thepositioning of the
operates the crank arm I52 to rotate the switch
outer guide rollers'byhand. The limit switch
arm‘ I53to open the circuit represented by the
I8I should also be provided with contacts which
vconductors VL+ and L- to the valve motor 21a.
will deenergize-the motor and prevent ,overwind
on the hydraulic engine. Hence as long as the
ing when the stowing cables are released from 25 guide roller I05 is not in its retired position, the
the platform and rewound on the stowing winch.
valve motor cannot be operated to raise or lower
The limit switch I8I should be adjusted in ac
the elevator and the hand control 210 must be
cordance with thelength of the hoisting cables
used for that purpose. The use of the valve mo
wound on the‘drum 59 when the folding platform
tor causes the engine to operate the elevator at
is moved by the stowing winch from its hori 30 a very rapid rate-which would be dangerous in
zontal position to its , vertical position. Inas
stowing, but the hand control may be very slowv '
much‘ as‘ limit switches of this type are old and
and suited to stowing operation or to inspection
well‘known, the details are not given.
‘ . ~
operation.
The limit switch.l82 for thesnubbing motor
'
7
It will be assumed ?rs that the elevator is in
its lower position at, the main deck I5, as indi
cated bythe dotted lines A, and that the attend
ants have removed the hinged plate cover 4Ia
from the hinge joint in the platform. At this
is similarly‘ connected-to the ‘snubbing drum ,83
and provided with switches for increasing the
torque ‘of the motor 96 when the folding plat
form reaches a‘ zone of a few inches from its ?nal
folded position and to deenergize the snubbing
time, the stowing shackles M63 and 68 (Fig. -1) and
thesnubbing; shackles 88, and 94. are lashedin
motor whenthe. folding platform completes its
folding motion. The limit switch I82 should also
,their withdrawn position adjacent to the sheaves
be provided with contacts for deenergizing the
62, 61, 86 and 92. The hand control 210 is now
operated to actuate the valve 21 and thereby cause
prevent operation of the snubbing winch when
the hoisting engine 2I to raise the elevator slowly
the snubbing cable is rewound thereon after be 45 to a position Where the catwalks represented by
ing detached from the platform. The'brakes‘11
the line I02 (Fig. 2) are practically level with the
snubbing motor upon a rewindingioperation to
and IOI on the motors-16 and 96 should be so
connected for voperation that they will be ap
plied to hold the motors in any position in which
they are deenergized.
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hanger deck I5. The attendants now remove the
bolts 42 on the joint III and. the bolts 52 on the
50 stowing pawls 49 to release the pawls. The hand
The invention may be better understood by an
assumed. operation of the apparatus described.
In preparing to place the elevator inits stowed
position, the attendant adjacent to the guide roll
control 21c is now ‘operated to cause the hoisting
engine to lower the elevator very slowly until the
stowing-pawls 49 rest on the stowing stops 53 on
» the guide rails.
The stowing cable shackles 63 and 68 are now
ers I05 and I06 raises the lid II4 on the casing 55 unlashed and run out and attached to the out
‘I09 and then grasps the handle I26 by its head
I21 and raises it upwardly out of its hole I31 into
a position where it clears the projection I35 and
board edge oi the folding- platform 40.
the cam tooth I38 to ride upwardly on the cam _
position, permitting independent operation of the
stowing controller andthe snubbing controller.
The
snubber shackles 88' and .974 are run out and at
tached to the lowermost edgeat the base of the
can beiused to rotate the crank arm I25. It will
folding platform 40. In connecting the shackles
60
be assumed now-that the attendant rotatesthe
to their points of attachment, the stowing cables
crank arm I25 in counterclockwise direction
and the snubbing cables will acquire some slack.
(Figs. ‘1 and 8) . Thisdirection of rotation causes
The master controller I11 is in its independent
facevv I40 of the cam" device I4I mounted'in the
casing and thereby raise the crank arm I25, the
shaft I24 and the gear wheel I23 upwardly until
they clear theedges‘ of the casing.
At’this point, .
thev cams level offand the parts rotate. in a hori-‘
zontal plane until the crank arm reaches: its full
In order to take up the slack in, the cables, the
stowing motor-is operated individually by its con
troller I151 to rotate themotor 16 to, take up the
slack'in the stowing cables. Likewise, the snub
ber controller H6 is voperated ‘individually to
out position. vWhen’the cranklarm, I25 reaches 70 cause the winch motor 96 to take up the slack in
its full out position, the handle ’ I 26 is dropped into
the snubbing cables. ,7 Care should betaken to see
a hole I311; inthe base toflocki the arm in its'out I that, the two; stowing cables have equal tension
position.
q
and that thetwo snubber cables have equal ten
The rotation of the crank arm also rotatessits
gear wheel ‘I23 disposed in mesh with the gear "
sion.
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2,408,759
11
"The folding. platformti' is now ready to be
to its'vertical position and itwill be as
sumed that the master switch Ill is moved to its
combination position in which it prevents individ
ual operation of the stowing controller or the
12
to cause the hydraulic engine 2| to raise the ele-‘
vator slowly until the catwalks are level with
the main deck and the men on such catwalks can
return to the main deck. The operation of the
hand control is now resumed and the elevator is
snubber controller and causes the combination
slowly raised until the stowing pawls 49 click
controller HS, when operated, to control the stow
over the stowing stops 48 on the guide rails II
ing motor and the snubbing motor simultane
and i2. The hand control is'now reversed and
ously for raising the folding platform ?ll to its
the hydraulic engine permits the elevator to
vertical position or for lowering it from that lo move downward slightly until its pawls 49 rest
position. The energized motors now start and
?rmly on the stops £8 so that the elevator is now
operatathe stowing winch 58 winding up the
in its completely stowed position-with its folding
stowing cables 56 and 5'! to pull upward on the
portion raised and locked between its guide rails.
outer end of the folding platform and the snub
It will be recalled that cams H! are mounted
bing winch 53-6 pulling backward on the snubbing 1. on the inboard side of the fore and the aft edge
cables 88 and 32 to effect a dragging action on
elements of the folding platform in such position
the folding platform, thus permitting it to move
that they slide against the guide rollers {93 and
upward» steadily but prevent it from being
W5 when the folding platform reaches its ?nal
slammed against the side of the'ship by either
stowed position and thereby take up practically
rolling of the ship or by wind or the waves. As
all the clearance between the edge elements and
‘the platform {if} swings upwardly on its hinge 41,
the guide rollers to permit only a very limited
it assumes the position shown inFig. 3. When it
movement'of the folding platform in its ?nal
is raised approximately 70° from its horizontal
stowed position so that it will be practically un
position, the limit switch !82 on the snubbing
affected byv wind or wave or the rolling. of the
Winch 86 operates to so change the electrical con
nections for the snubbing motor as to increase
its retarding torque and thereby supply an- in
creased amount of resistance to the effect of
wind or waves tending to slam the platform
against the ship.
>
ship.
'
In removing the elevator from its stowed con
dition and returning it to its normal operating
condition, the previously described steps are re‘
versed and, therefore, no detailed. operation of
this action will be given.
' As the folding platform reaches a position ap
proximately four inches from its actual stowed
position, the limit switch i8! upon the stowing
winch ii}; is actuated to change the stowing motor
from its high speed to its low speed connection
and thus decrease the speed of movement of the
folding platform toward the guiding rollers‘ E63
and H35 in the edge of the ?ight deck. As the
folding platform reaches a position of approxi
mately three inches from the guide rollers Hi3
and 555, the limit switch £83 decreases the slow
speed of the hoist motor so that under the in
creased snubbing effect of the snubbing motor
and the decreased hoisting effect of the stowing
motor, the platform is slowly pulled up against
the stowing guide rollers Hi3 and i 05.
With the folding platform in its vertical posi
tion, the attendant adjacent the guide roller I86
1
in a near vertical position while it and the base
platform 39 are being moved to their uppermost
position where the. base is level with the ?ight
deck and holding it in such position while it re
mains in its stowed position.
Each ofthe stowing struts 2l1l is provided with
an outboard stowing base 202 and an inboard
stowing base 283.
raises the handle I353 from its hole 136 in the
.
Referring now to Figs. 11 and 12, at times it
may be desirable to stow the elevator platform at
the ?ight deck, that is, with the floor 44 of the
base section 39 level with the floor on the ?ight
deck it. In this high stowing position of the
platform the use of the snubbing cables would
be inconvenient and awkward and the guide roll
ers I03, etc., could not be used. Therefore I
have provided a pair of stowing struts 2%", one at
40 each end of the folding platform, for holding it
The strut 20!’ is integrally '
connected to its outboard base by a pin 254 and
casing we and rotates the arm I33 in itsvclock
wise direction (Figs. '7 and 8) thereby moving the
a pin M35 is provided for hingedly‘connecting the
inboard end of the strut to the inboard stowing
base. The. struts are constructed with'adjust
able parts so that they may be slightly length
guide roller tilt into the position indicated in
Fig. 5 alongside the edge HE! of the folding plat
form. When the roller 1% is in its outermost
ened or shortened to cooperate with each other.
position, the handle I34 is dropped into the hole ,-,
In starting a high stowing operation of the
lSBa in'the casing to lock the roller in its out
elevator, each of the. struts 20| has its outboard
position. The roller ms is likewise moved for
base 282 bolted. in place on the folding platform
ward to its guiding position close to the after
‘til as indicated in Fig. 11, and the body of the
end of the folding platform and the handle on
strut is disposed rearwardly towards its inboard
its crank arm is dropped into its locking hole.
stowing base 263. Then the elevator platform is
The master switch is now moved to its inde
raised by operation of the hand control device
pendent position thereby disconnecting the com
21c andv allowed. to rest with its stowing pawls 49
bination controller and conditioning the snubber
disposed on the stowing teeth 53 to hold the plat
controller and the stowing controller to be oper~
form ?rmly in its position for starting the fold
ated individually. The stowing controller and 65 ing movement of the foldingv platform 48,‘ as pre
the snubbing controller are now operated indi
viously .described.
>
vidually to cause the stowing motor and the
The stowing cables 56 and 5.1.‘are next attached
snubbing motor to slacken the stowing cables
and'the snubber cables so‘ that they will remain
in slack condition during the remainder of the
stowing. operation.
.
With the folding platform disposed in its veré
tical position and locked between the guide rollers
"
to‘ the outer edge of‘ thefolding platform 4!! and
then drawn to taut condition as previously de
scribed. When the stowing struts are used the
master controller is left- in its independent posi
tion so that the stowing motor may be operated
individually by the stowing controller I15, and
and the stowing and snubbing cables in slack
the snubbing' winch need not be used. Next the
condition, the hand control 270 is now operated 75 stowing, controller‘ is operated individually to
.13
'14
.
hand device or the motor, a stowing winch for
cause the stowing winch 58'to wind up thestow
the folding; platform, a stowing motor for oper
ing cables and thus raise the folding platform 40
ating the stowing winch, a plurality of stowing
on its hinged joint 4| until it is approximately 70°
cables attached to the stowing winch, a plural
from its horizontal position. This folding of the
itypf shackles for attaching the outer ends of
platform All on its hinge 4| moves the struts 20!
the stowing cables to vthe outboard end of the
until their inboard ends reach their inboard
folding platform, a snubbing winch for the fold
stowing bases 203. The strut which?rst enters
ing platform, a snubbing motor for operating the
its inboard stowing. base is pinned therein by'its
snubbing winch, a plurality of snubbing cables
pivot pin 295 and thelength of the second strut
attached» to the snubbing winch, a plurality of
10
ispadjusted until its locking pin 205 canbe used
shackles forattaching the outer ends of the snub
to .pin it in its inboard stowing base. With the
bing cables to the lowermost base part of the
struts securely fastened,‘ the stowing motor is
folding ‘platform, av plurality of guide rollers
operated by the stowing controller H5 to slack
mountedon the ?ight, deck for engaging opposite
off the stowing cables and they are‘ then discon
sides of the fore and aft edge elements of the
nected from their shackles (leaving the shackles
folding platform~for guiding it in its vertical
- attached to the platform 43 for use when re
maintaining it in itsap
‘
movements
and, for
turning the platform to its normal position) and
proximately'vertical position during stowing op
the stowing'winch is operated to wind them up.
'eration, individualmeans for moving the guide
The shackles should‘ be lashed to the folding
rollers intostowing service position and for re
tiring them from their service position to their
_ The hand control 210 is now operated to move
non-service position when the elevator is in'nor
the elevator upward slowly until the ?oor of the
mal operation, individual means for locking each
base 39v is level with the night deck Hi. It will be
guide roller in its non-service position, a stow
necessary to have an attendant hold the limit
ing controller for operating the stowing motor,
pawls 55 away from the limit teeth 54 while the
a snubbing controller for operating the snub
base 39 is moving past that section of the guide.
bing motor, a combination controller for oper
rails. The elevator is now stowed with the base
ating the stowing motor and the snubbing mo
39 level with the ?ight deck and the struts v2M
tor, whereby the folding platform may be raised
will maintain the folding platform in its ap
‘from its horizontal position to approximately ver
proximately vertical position while the elevator 30 tical position and the platform base bearing the
remains stowed. When the elevator is to be re
folding platform in approximately vertical posi
moved from its stowed position, the foregoing
tion may then ‘be-raised by hand control to a pre
operationis reversed but the attendants must see
determined stowing position adjacent the ?ight
platform.
"
,
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I
that the pawls 49 are held away from the ,stow
ing teeth ,48'when the platform is moveddown
deck_
_.
.
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from its ?ight deck position to its stowing posi- '
Y 2; A deck'edge elevator for an upper deck and
a lower deck, on a ship'comprising, a pair of guide
tion on the teeth 53. _
railsdisposed on the side of the ship, a base plat
By the foregoing description of the apparatus
form disposed between the guide rails, a plurality
and the operation thereof, it will be seen that
of stowing teeth and stowing pawls cooperatively
I have provided a very efficient and inexpensive 7110 disposed on the ‘base platform and the guide rails,
means for stowing a deck-edge elevator on the
side ‘of a ship so that the ship may pass through
a narrow lock‘ or other narrow place without
damaging the'deck-edge elevator. It will also
be evident that the apparatus although strong
and sturdy is simple and inexpensive and easy
to install and maintain in operation.
'
7,
Although I have illustrated only one embodi
ment and one modi?cation of my invention, it is
for “supporting the base platform in predeter
mined , stowing positions, a
folding platform
hingedly mounted on'the base platform with its
upper surface normally disposed in the same
plane as the base platform, a plurality of hoisting
cables for the main platform, a hydraulic engine
for operating the hoisting cables" to raise or lower
the ,base platform,; a hand ‘device for controlling ‘
the engine, a valve motor for controlling the en
to be understood that many changes therein and 50 gine, ‘gear means‘for permitting vcontrol of the
other modi?cations thereof may be made without
engine by operation of either the hand device or
departing from the spirit and scope of the inven
the valve motor, a stowing winch, a stowing motor
for the StOWing- winch, a plurality of stowing
U 1'; claim as my invention:
cables attached :to the stowing winch for raising
for
an
upper
main‘
1. A deck edge'elevator
or‘: lowering the folding platform, a snubbing
deck and a lower deck on a shillcomprising, a
winch, a snubbing-motor for operating the snub
pair of guide rails, means for mounting the guide
bing Winch, .a plurality of.-;snubbing ~ cables -- at-‘
railsv in vertical position on- the side of the ship,
tached to the snubbing winch for effecting a drag
a platform base disposed between the guide ‘rails
the folding platform, va plurality of guide roll--v
forservingtheeupper deck and the lower deck, 60 on
ers mounted on the ?ight deck for engaging the
a plurality of stowing teeth disposed-on the guide
fore and aft ends of the folding platform to‘ guide
rails, a plurality of stowing pawls disposed on
it inits'vertical movements, means for moving the
the‘platform basefor engaging the teeth to rest
guide-rollers into stowing service position and
and supportthe platform base in predetermined
for retiring them; from their service position'to
stowing‘ positions, a folding platform hingedly
their non-service position," a, combination con
mounted on the platform-base with its upper Sure-2.
troller foroperating andmeans for controlling
face ‘normally disposed in the same plane as the
the valve motor, the stowing motor and the snubia
platform base, a plurality of hoisting cables for
bing motor whereby the folding platform may be
the platform ‘base, a=hydraulic enginev for oper
raised, from its horizontal position to approxi;v
70
ating- the hoisting vvcables ‘to raise and lower» the
mat'ely vertical position and :the base platform
platform base, a valve for the engine, an elec-_
bearing ‘thelfolding platform in approximately
tricrnotor for operating the valve‘, a hand cone"
vertical position mayithen be raised by hand con-‘
trolled device'for operating the valve gear means
trol to a predetermined stowingposition adjacent‘.
for connecting the handdevice'pr the-motor to.
tion.
,
.
»
the .valveto permit independent operationof the 75;
the ?ight'deck.”
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15
2,408,769
3. In a deck edge elevator for an upper deck and
a lower deck on a ship, a pair of guide rails, an
elevator platform for serving the upper deck and
the lower deck, said platform having a base sec
tion disposed between the guide rails and an out
board folding section hingedly mounted on the
base section, a plurality » of stowing teeth and
stowing pawls cooperatively disposed on the guide
rails and base section to rest and support the
outboard folding section hingedly mounted on‘
the base section, a plurality of stowing teeth and
stowing pawls cooperatively disposed on the guide
rails and base platform section to rest and sup
port the platform in predetermined stowing posi
tions, a plurality of hoisting cables for the base
platform section, an engine for operating the
hoisting cables in raising and lowering the plat
form, an electric motor for controlling the en
platform in predetermined stowing positions, a 10 gine, a hand controlled device for controlling the
plurality of hoisting cables for the base platform
engine, a stowing winch, a stowing motor for
section, an engine for operating the hoisting
the stowing winch, a plurality of stowing cables
cables in raising and lowering the platform, an
attached to the stowing winch for raising and.
electric motor for controlling the engine, a hand
controlled device for controlling the engine, a
stowing winch, a stowing motor for the stowing
winch, a plurality of stowing cables attached to
the stowing winch for raising and lowering the
folding platform section on the base platform sec
tion, a snubbing winch, a snubbing motor for the
snubbing winch, a plurality of snubbing cables
connected to the snubbing winch and the folding
platform for restraining its movement when oper
ated by the stowing cables, a plurality of guide
lowering the folding platform section on the base
platform section, a snubbing winch, a snubbing
motor for operating the snubbing winch, a plu
rality of snubbing cables connected to the snub
bing winch and the folding platform for restrain_
ing its movement when operated by the stowing
cables, and a, plurality of guides mounted on the
flight deck for engaging the fore and aft edges
of the folding platform for guiding it in its verti
cal movements, whereby the folding platform
section may be folded against the ship and both
rollers mounted on the ?ight deck for engaging =.. sections then raised to stowing position.
the fore and aft edges of the folding platform for
6. In a deck edge elevator for an upper deck
guiding it in its vertical movements, individual
and a lower deck on a ship, a pair of _g|_uide rails,
means for moving the guide rollers into stowing
an elevator platform for serving the upper deck
service position and for retiring them from their
and the lower deck, said platform having a base
service position to their non-service position, and
platform section disposed between the guide rails
means for controlling the control motor on the
and an outboard folding platform section
engine, the stowing motor and the snubbing
hingedly mounted on the base section, a plurality
motor, while the folding platform is raised or
of hoisting cables for the base platform section,
lowered on its base section, whereby the folding
an engine for operating the hoisting cables in
platform section may be folded against the ship
raising and lowering the platform, a stowing
and both sections then raised to stowing position.
winch, a plurality of stowing cables attached to
4. In a deck edge elevator for an upper deck
the stowing winch for raising and lowering the
and a lower deck on a ship, a pair of guide rails,
folding platform section on the base platform
an elevator platform for serving the upper deck
section, a snubbing winch, a plurality of snub
and the lower deck, said platform having a base 40 bing cables connected to the snubbing winch,
section disposed between the guide rails and an
manual means for connecting the snubbing cables
outboard folding section hingedly mounted on the
to the folding platform for restraining its move
base section, a plurality of stowing teeth and
ment when operated by the stowing cables, a
stowing pawls cooperatively disposed on the guide
motor for operating the stowing win(& a motor
rails and base section to rest and support the
for operating the snubbing winch, whereby the
platform in predetermined stowing positions, a
folding platform section may be raised to a near
plurality of hoisting cables for the base platform
vertical position on the base platform section and
section, an engine for operating the hoisting
both sections than raised as a unit to a stowing
cables in raising and lowering the platform, an
position, a plurality of struts, and means for
electric motor for controlling the engine, a hand ~ mounting the struts between the folding plat
controlled device for controlling the engine, a
form section and the base platform section to
stowing winch, a stowing motor for the stowing
brace the folding platform section in its near
winch, a plurality of stowing cables attached to
vertical position on the base platform position
the stowing winch for raising and lowering the
when they are to be moved to a higher stowing
folding platform section on the base platform -, position. ‘
section, a snubbing winch, a snubbing motor for
'7. In a deck edge elevator for an upper deck
operating the snubbing winch, a plurality of snub
and a lower deck on a ship, a pair of guide rails,
bing cables connected to the snubbing winch
an elevator platform for serving the upper deck
and the folding platform for restraining
and the lower deck, said platform havingra base
its movement when operated by the stow 60 platform section disposed between the guide rails
ing cables, a. plurality of guide rollers
and an outboard folding platform section
mounted on the ?ight deck for engaging
hingedly mounted on the base platform section,
the ‘fore and aft edges of the folding platform
a plurality of hoisting cables for the base plat
for guiding it in its vertical movements, means
form section, an engine for operating the hoist
for moving the guide rollers into stowing service
ing cables in raising and lowering the platform,
position and for retiring them from their service
a stowing winch, a stowing cable attached to
position to their non-service position, and means
the stowing winch for rasing and lowering the
for controlling the motors, whereby the folding
folding vplatform ‘section on the base platform
platform section may be folded against the ship
section, a snubbing winch, a snubbing cable con
and both sections then raised to stowing position. 70 nected to the snubbing winch and the folding
5. In a deck edge elevator for an upper deck
platform, section for restraining .its movement
and a lower deck on a ship, a pair of guide rails,
when ‘operated by the stowing cable, and means
an elevator platform for serving the upper deck
for controlling the operation of the stowing winch
and. the lower deck, said platform having a base
and thesnubbing winch.
section disposed between the guide rails and an
‘8. In a deck edge elevator for an upper deck
2,408,759
17
and a lower deck on a ship, a pair of, guiderails,
anelevator platform for serving the-upper deck
and the lower deck, said platform having a base
section disposed on the guide rails and an out
board folding platform section hingedly mounted
on‘the base section, a plurality of hoisting cables
for the base section, an engine for operating'the
hoisting cables in raising and lowering the plat
18
platform section are being raised or lowered "as a
unit.
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12. A deck edge elevator platform guide com
prising, a casing,‘ a pair of guide shafts slidably
and horizontally mounted'inthe casing, a roller
rotatably mounted on the outer end of each guide
‘shaft, a shank mounted on the rear end of each
guide shaft and provided with gear teeth in its
one side, a vertical shaft rotatably mounted in
form, ‘a stowing power means for raisingand
lowering the folding platform section on the base 10 the casing for each shank, a gear wheel ?xed on
each verticalshaft and disposed in mesh with the
section, and a snubbing power means for re
straining the movement of the folding platform
section while it is under operation by the stowing
~ power 111631115.
gear teeth on the shank with which that shaft is
' associated, a‘ crank arm ?xed on the upper end
of each vertical shaft, a handle slidably disposed
9. In a deck edge elevator'for anupper deck 15 in the outer end of each crank arm for turning
that crank arm, a stop block disposed beneath
on a lower deck on a ship, a pair of guide rails,
an elevator platformvfor serving the upper deck
and the lower deck, said platform having a base
platform section disposed on the guide rails and a
hinged platform section mounted on the base
platform section, a stowing power means for
swinging the hinged platform section from its ap-‘
each slidable handle for preventing rotation‘ of
platform section to guide and maintain it in its
approximately vertical position While it and the
bell crank lever pivotally mounted in the casing
with onearm pivotally attached to the ?oating
the crank arm while the handle is in its lower
most position, a pair of cooperating cams for
each crank arm,- one attached to the casing and
the other attached to that crank arm for causing
that crank arm to move out of the casing when
it is rotated to move its guide roller ‘to its service
, proximately horizontal position to a near vertical
position and to permit it to move within the cas
position, a plurality of hoisting cables for the base
platform section, anengine for operating the 25 ing vwhen the crank arm is rotated to move the
roller to its non-service position, a switch
hoisting cables in raising and lowering the plat
mounted in the casing, a switch arm for operat
form with the hinged platform section in either
ing the switch, means for biasing the switch arm
its horizontal position or its near. vertical posi
to open switch position, a ?oating lever mounted
ton, and gudes mounted on the upper deck for
'in
the casing with its outer portions disposed in
engaging the fore and aft edges of the hinged 30
engagement with the rear ends of the shanks, a
base platform section are being raised or lowered
lever and its other arm disposed in engagement
,
r
,
with the switch arm at the side opposite to that
10. In a deck edge elevator for an upper deck 35 engaged by the-biasing means, whereby the switch
and a lower deck on a ship, a pair of guide rails,
arm will be held inits switch closed position by
an elevator platform for serving the upper deck
the shanks when the guide rollers are in their
and the lower deck, said platform having a base
non-service position, and an adjustable bumper
section disposed on the guide rails and a hinged
block mounted in the casing between the guide
platform section mounted on the base section, 40 rollers to- provide a biu'nper for the edge of the
a stowing power means for swinging the hinged
platform.’
as a unit.
platform section from its approximately horizon
tal position to a near vertical position, a, plurality
prising, a casing, a pair of guides slidably and
of hoisting cables for the base section, an engine
horizontally mounted in parallel position in the
for operating the hoisting cables in raising the
base section with the hinged platform section in
casing for embracing an edge of the platform, a
shank mounted on the rear end of each guide and
either its horizontal position or its near, ver
'provided with gear teeth in its one side, a gear
tical position until the base section is approxi
mately level with the upper deck, a plurality of
shaft rotatably mounted in the casing for each
struts, and meansifor mounting the struts be
tween the base section and the hinged platform
section while it is in its near vertical position to
brace the hinged platform section on the base
section while they are being raised or lowered as
a unit and while they are in top stowing position
13‘. A deck edge elevator platform guide com
shank, a gear wheel ?xed on each gear shaft and
disposed in mesh with the gear teeth on the shank
with which that shaft is associated whereby rota
tion of the shaft moves its shank, a crank arm
?xed on each gear shaft, a handle slidably dis
posed in the outer end of each crank arm for
' vturning that crank arm, a stop block in the cas
ing for each slidablevhandle for preventing ro
tation of its crank ‘arm while the handle is in its
upper deck.
"
lower position, a cam means associated with each
11. In a deck edge elevator for an upper deck
crank arm for causing that crank arm to rise out
60
and a lower deck on a ship, a pair of guide rails,
of the casing when it is rotated to move its guide
an elevator platform for serving the upper deck
rolleroutwardly and to permit the crank arm to
and the lower deck, said platform having a base
sink within the casing when the crank arm is ro
platform section disposed on the guide rails and
tated to move the roller to its nonéservice posi—'
ahinged platform section mounted on the base 65 tion, a switch mounted in the casing, a ?oating
platform ‘ section, a stowing power means for
lever mounted in the casing with its outer por
with the base sectionapproximately level with the
swinging the hinged platform section from its ap
tions disposed in engagement with the shanks,
proximately horizontal position to a near vertical
operating means connecting the lever with the
position, a plurality’ of‘ hoisting cables for the
base platform section, an engine for operating
the hoisting cables in raising and-lowering the
platform with the hinged platform section in
either its horizontal position or its near vertical
position, and guides‘mounted on the upper deck
for maintaining the hinged platform section in
its near Vertical position while it and the base
switch whereby operation of either shank to
move'its guide rollerto its service position will
open the
switch.
‘
'
I
'
14. 'A deck edge ‘elevator platform guide com;
prising, a casing, a pair of guides slidably and
horizontally mounted in parallel position in the
casing for embracing an edge of the platform, a
2,408,759
19
shank mounted on the rear end of each guide and
provided with gear teeth, a gear shaft rotatably
mounted in the casing for each shank, a gear
wheel fixed on each gear shaft and disposed in
mesh with the gear teeth on the shank with which
20
pressed condition, a circular body mounted in the
casing concentric with the gear shaft, a cam tooth
mounted on the under face of the crank arm in
cooperative relation with the cam mounted in the
casing whereby rotation of the crank arm to
that shaft is associated whereby rotation of the
move the ‘guide shaft outwardly will cause the
shaft causes axial movement of the shank asso
gear shaft and its gear wheel to rise, a switch, and
ciated with it, a crank arm ?xed on each gear
lever means responsive to movement of the shank
shaft, a handle slidably disposed in the outer end
for operating the switch when the guide shaft is
10
of each crank arm for rotating that crank arm,
moved to its service position.
a stop block mounted in the casing for each slid
1'7. A guide for the edge of a platform compris
able handle to prevent sideway movement of it
ing a casing, a guide shaft slidably mounted in the
when it is in its lowermost position, and a pair
casing, a shank mounted on the rear end of the
of cooperating cams for each crank arm, one at
guide shaft, said shank having gear teeth out in
tached to the casing ‘and the other attached to
its side, a gear shaft rotatably mounted in the
the crank arm, for causing that crank arm .to rise
casing, a gear wheel ?xed on the gear shaft and
out of the casing when it is rotated to move its
disposed in mesh with the teeth on the shank, a
guide outwardly and to permit the crank arm to
crank arm ?xed on the gear shaft, a handle slid
sink within the casing when the crank arm is
ably disposed in the outer end of the crank arm
rotated to move the guide to its non-service po
for rotating the crank arm to move the guide
sition.
shaft outwardly and inwardly, a stop block
15. A guide for the edge of a platform com
mounted on the casing in position to engage the
prising a casing, a cylindrical shaft slidably
slidable handle and prevent rotation of the crank
mounted in the casing, a shaft guide mounted in
arm while the slidable handle is in its depressed
the casing to engage a slot in the cylindrical shaft
position, a circular cam body mounted in the
and thereby limit its outer movement and prevent
casing concentric with the gear shaft, a cam tooth
its rotation, a guide roller rotatably mounted on
mounted on the under face of the crank arm in
the outer end of the guide shaft, a shank mount
cooperative relation with the cam mounted in
ed on the rear end of the guide shaft, said shank
the casing whereby rotation of the crank arm to
having gear teeth out in its one side, a vertical ‘ move the guide shaft outwardly will cause the
shaft rotatably mounted in the casing, a gear
gear shaft to rise.
wheel ?xed on the vertical shaft with its teeth
18. A guide for the edge of a platform compris~
in mesh with the teeth in the shank and of less
ing a casing, a guide shaft slidably mounted in
width than the width of the teeth in the shank,
the casing, a shank mounted on the rear end of
a crank arm fixed on the upper end of the ver
the guide shaft, said shank having gear teeth in
tical shaft, a handle slidably disposed in the
its side, a gear shaft rotatably mounted in the
outer end of the crank arm for rotating the
casing, a gear wheel ?xed on the gear shaft with
crank arm to move the guide roller outwardly and
its teeth disposed in mesh with the teeth on the
inwardly, a stop block mounted on the casing in
shank, a crank arm ?xed on the gear shaft, a
position to engage the slidable handle and pre 40 handle slidably disposed in the outer end of the
vent rotation of the crank arm while the slidable
crank arm for rotating the crank arm to move
handle is in its depressed condition, a circular
the guide shaft outwardly and inwardly, a stop
body mounted in the casing concentric with the
block mounted on the casing in position to engage
vertical shaft, a cam tooth mounted on the un
the slidable handle and prevent rotation of the
der face of the crank arm in cooperative relation
crank arm while the slidable handle is in its de
with the cam mounted in the casing whereby ro
pressed position, and a pair of cooperating cams,
tation of the crank arm will cause the vertical
one attached to the casing and the other at
shaft and its gear wheel to rise, a switch mounted
tached to the crank arm, for causing the crank
in the casing, a switch arm for operating the
arm to move out of the casing.
switch, means for biasing the switch arm to open
19. In a deck edge elevator for an upper deck
position, a floating lever having one end disposed
and a lower deck on a ship, a pair of guide rails,
in engagement with the shank, and lever means
an elevator platform for serving the upper deck
connecting the switch arm and the ?oating lever
and-the lower deck, said platform having a base
whereby movement of the shaft to its innermost
section movably disposed between the guide rails
position will cause the switch to close the move- -VI 141 and an outboard folding platform section hinged
ment of the shank to its outer position will re
lease the ?oating lever and permit the biasing
means to open the switch.
ly mounted on the base section, said platform sec
tions having cooperating, projecting and receding
portions on their adjacent sides below their
16. A guide for the edge of a platform compris
hinged joint for assisting in supporting the fold
ing a casing, a guide shaft slidably mounted in 60 ing platform section on the base section when the
the casing, a shank mounted on the rear end of
the guide shaft, said shank having gear teeth out
folding platform section is horizontally disposed, a
plurality of hoisting cables for the base section,
a stowing winch, a stowing cable operable by the
stowing winch for folding the folding platform
in its one side, a gear shaft rotatably mounted
in the casing, a gear wheel ?xed on the gear shaft
with its teeth in mesh with the teeth in the 65 section on the base section, a snubbing winch, a
shank and of less width than the width of the
snubbing cable operable by the snubbing winch
teeth on the shank, a crank arm ?xed on the
for restraining the up movement of the folding
gear shaft, a handle slidably disposed in the outer
platform section during a folding operation, and
end of the'crank arm for rotating the crank arm
a, hoisting engine for operating the hoisting cables
to move the guide outwardly and inwardly, a stop
to raise or lower the platform during normal serv~
block mounted in the casing in position to engage
ice or in a stowing operation.
the slidable handle and prevent rotation of the
crank arm while the slidable handle is in its de
JAMES DUNLOP.
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