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Oct. 8, 1946. _
_
J. DUNLOP ‘ET AL
- 2,408,762
‘LOCKING AP‘PARATI-IS FOR ELEVATOR ‘PLATFORMS
Filed Dec. 16_, 1943
4 Sheets-Sheet 2
.“a:
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mvswroes
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James Dun lap and
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2,408,762
Patented Oct. 8, 1946
UNITED STATES " PATENT OFFICE
LOCKING APPARATUS FOR ELEVATOR
PLATFORMS
James Dunlop, Ridgewood, and Lennie R. Rissler,
Hohokus, N. J.,' assignors, by mesne assign
ments, to Westinghouse
> East Pittsburgh, Pa, a
Electric Corporation,
’
corporation of Penn
sylvania
‘Application December 16, 1943, Serial No. 514,520 I
~20 Claims.
1
tion from the inboard side of the mechanism for
interlocking the vhoisting engine and the plat
form locking apparatus shown in Fig. 5,
Our invention relates to locking apparatusfor
elevator platforms and more particularly to'lock
ing apparatus for securely holding large elevator
Fig. 9 is a view taken'on the line IX-JX
platforms in a wedge-locked position at a landing.
One object of our invention is to provide for
Fig. 8.
forms at a parking ?oor.
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,Fig.‘ 10 is an enlarged view in side elevation,
taken from the aft end of the platform, of the
?rmly wedging and locking large elevator plat?
_
Another object is to provide a wedge lock for
large elevator platforms at a parking ?oor which.
will maintain its wedging action as long as the 10
cam mechanism responsive to the position ofth'e
platform for preventing operation of the locking
apparatus until the platform is level with the
?ight deckjand.
lock is’ in looking position.’
Fig. 11 is a view in
, Afurther object is to so look and wedge the
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side elevation of the hand
- lever and ratchet wheel for operating the lock
platform of a deck-edge elevator at a ?ight deck
ing apparatus by hand.
on a ship as to overcome the battering-ram effect '
.
The invention is illustrated as applied to _ a
of the platform on the ship due to pitch and roll 15 deck edge elevator on an airplane carrier ship. .
and also to the wind and the sea.
,
In a typical ship of this character having ‘a deck
A still further object is to provide a wedge
edge elevator the‘ ?ight deck overhangs the edge
and locking apparatus which will maintain an
of the ship about 16 feet and out of this over-v
elevator platform securely in position at a ?ight
hanging part of the deck is notched a spacefor
20'
deck on a ship regardless of the action of the
the elevator platform. _ Such a platform‘ is about
ship, the elements or any warpage of the deck
60 feet long and 34 feet wide and weighs approx
or change in the size of the platform vopening
imately 60 tons. The outboard portion of the
in the deck due to changes in temperature. '~
platform extends approximately 718 feet, beyond
It is also an object to provide a wedging; and
the overhanging edge of the ?ight deck. The
locking apparatus for elevator platforms which 25 guides for the platform are mounted on the out
may be easily operated either by power or by
side of the ship hull: andtheplatform is sus
hand and which may be easily maintained in
sound operative condition under all circum
stances.
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For a better understanding of the invention,
reference may be had to the accompanying draw.
ings; in which:
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_
pended and operated in ‘the guides by a plurality
of hoisting cablesl which ‘pass over ‘sheaves
30 mounted on the underside of the overhanging
part of the deck and which are attached'to, the
fore and aft ends of the platform. The platform
is suspended entirely by‘ its hoistingeablesand
‘
v Figure lis a View’ in'aft end elevation of a
is not counterweighed.
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deck edge elevator for an airplane carrier ship,
When the platform is not in ordinary use and
35
with the elevator platform at the main deck, '
the roll of the ship exceeds 10°,it should belocked
Fig. 2 is a view in side elevation taken from
at the ?ight deck“ For this purpose, we, pro
the inside ‘of theship and looking in the out
vide two looks at its ‘fore end and'two looks at
board direction, with the platform at the ?ight
its aft end. The‘inboard look at the fore end
and the inboard look at the aft end are mounted
deck,
I
40
Fig. 3 is an enlarged top-plan'view of. the eleva
on the underside of the overhanging, deck. close
tor platform lock in position at the ?ight deck,
part of the ?ight deck being broken away to dis-.
close our improved ‘locking’ apparatus and the ‘
platform being shown in broken parts to accom
modate the ?gure to the drawing,
Fig. 4 is a view in fore end elevation of the lock- '
ing apparatus illustrated'in Fig. 3,. .
1
to the ship hull. The outboardlock'at‘the fore
end and the outboard look at the ‘aft end are
mounted underneath the ?ight deck near its‘ out
45 board edge. The locks are connected together so
that they maybe operated in unisoneither by
pneumatic power or
.
Fig. 5 is a view in inboard side elevation of
the locking apparatus illustrated in Figure. 3,
byhand.
.
This arrangement of locks will permit a move
iment of the platform under the action of exter
nallyrappliedforces, such as the platform dip
Fig. 6 is a vertical longitudinal section through 50 ping into a wave with the ship under motion.
the inboard look at the aft end of the platform,
Fig. '7 is a vertical longitudinal section through
the outboard wedge look at the aft end of the
platform, i
.
Fig. 8 is an enlarged vertical longitudinalsec-r 55
This platform movement will progress until the
externally applied turning moment is balanced
by a countermoment'ekerted by the roller guides
against the rollers of'the platform. Any turning
3
2,408,762
moment is therefore resisted by reactions at op
posite ends of the platform, instead of by re
actions at the locking members, which have a
much shorter lever arm.
When the ship rolls heavily the outer portion
of the platform dips into the water. As the plat
form strikes the water severe stresses are set up.
On coming out of the water the platform lifts
many tons of water, thereby creating heavy addi
tional stresses.
The stresses are taken on ,by'
the four looks. The inboard locks are designed to
take vertical reactions only and the outboard
4
the elevator from dropping on down through the
slots in case of failure of the safeties and cables,
etc. In normal use the platform is suspended
entirely on its hoisting cables and no counter‘
weights are provided.
The hoisting engine I8 is a hydraulic engine
comprising a single cylinder 34 mounted in a
horizontal position on a frame or engine bed 35
and a power plunger 33 disposed in the cylinder.
The outer end of the plunger is provided with a
power head 31 in which a pair of power sheaves
38 are rotatably mounted. The plunger slides
back and forth in the cylinder and thus moves
power sheaves back and forth with it. The
not taken on any of the locks but._are taken on 15 the
plunger is designed for operation by a suitable
the elevator guides. In order to prevent a batter
hydraulic medium. such as oil placed under pres~
ing ram e?ect of the platform on the ship' due
sure by any suitable pumping apparatus (not
to pitch and roll and also to wind and sea, the
shown). A valve block 39 is mounted on the cyl~
outboard locks are made wedge shaped so that
locks are designed to take both Vertical and fore
and aft loads. The reactions athwartship are
the platform will be locked tightly to the ?ight
deck and there can be no looseness between the
?ight deck and the ship. even though there should
be warpage of the ?ight deck or a change in size
of the notch in the deck due to changes in tem
perature.
Although the invention is described in connec
tion with a deck edge elevator on an airplane
carrier ship, it may be used in connection with
any movable body which should be securely locked
and wedged in a particular position.
Referring more particularly to the drawings,
we have illustrated a deck edge elevator compris
ing an elevator platform It disposed between a
pair of guide rails II and I2 mounted on the
outside of a ship hull I3, in position to be sup
ported by and to be raised and lowered between
a main deck I4 and a ?ight deck or parking
?oor I5 by a plurality of hoisting cables I6 and
I1 operated by a hoisting engine I8,
The platform I!) comprises a base section 29
and a hinged or outboard section 21 the floors of
which normally lie in the same plane and provide
a large level area upon which airplanes may be
moved and carried from one deck to another.
inder for controlling the operation of the plung
er by controlling the admission of the oil to the
cylinder. An electric motor 49 is connected with
the valve block for operating the valve mecha~
nism therein.
A pair of down stopping blocks iii are mounted
as on the cylinder block in position to engage the
power head for the purpose of limiting the rear
ward motion of the plunger when the elevator is
being lowered to the main deck and a pair of up
stopping blocks 42 are mounted on a projection
43 on the engine bed in position to limit the for
ward stroke of the plunger when the platform is
being raised to the ?ight deck.
'
The hoisting cables I6 at the aft end of the
platform (Fig. 2) are secured to the base 20 by
a bracket 45 and pass upwardly and over an
idler sheave 46 fastened to the ship structure
underneath the overhanging portion of the ?ight
deck, thence rearwardly over a second idler
sheave 41 mounted on the ship frame inside the
hull, thence downwardly and under a de?ector
sheave 48 mounted on the engine bed 35, thence
With a suitable ?ooring 22 laid upon a frame 23
around a stationary sheave 49 mounted on the
engine bed, thence forward and around the one
of the power sheaves 38 and thence to adead end
‘hitch 50 on the lower part of the rear end of the
made of seamless steel tubing, structural steel
sections and steel plate welded together in bridge
like construction .to form a relatively light but
The hoisting cables i’! at the fore end of the
elevator are secured to the base 23 by a bracket
The base section of the platformv is constructed
strong structure.
The outboard section of the ‘
platform is also constructed with ‘a suitable ?oor
24 laid upon a frame .25 of seamless steel tub
ing, structural steel and steel plate welded to.
engine cylinder 34.
52 and pass upwardly and over an idler sheave
53 fastened to the ship structure underneath‘ the
overhanging portion of the flight“ deck, thence
rearwardly over a second idler sheave 54 mounted
on the ship frame inside the hull, thence down
gether in bridge like construction in the same
ward
and undera de?ector sheave 55 mounted
manner as the. base and is. mounted upon and I»: on theengine
bed, thence under and over one of
connected to, the. base With asuitable hinged joint
the power sheaves 38, and thence to a dead-end
26 so that it may be raised from its normal hori
hitch 56 on the upper part of the rear end of
zontal position into a vertical position on the base
the engine cylinder. This roping arrangement is
when the ship has to pass through .a canal lock or
described and claimed in the copending applica
other narrow opening,
as described and claimed -.
in the copending application, Serial No. 513,029
?led Dec. 6, 1943.
The guide rails II and I2 are mounted in ver
'tical. position and. facing each other on the side
of the ship hullv by means, of a plurality of hori
zontally disposed brackets 28,.
The guide rails are provided with vertical slots
29 in their sides facing each other which are
disposed to receive a plurality of rollers 35 rotat
ably mounted on the base section 20 for the pur- f'
‘pose of guiding the movement of the elevator
platform as it is raised or lowered and for also
maintaining the platform in its horizontal posi
tion. A block 32 is securely fastened by welding
to- the lower end of veach guide rail to prevent
tion Serial No. 507,132, ?led October 21, 1943.
We have provided an
forward inboard lock (it,
and a forward outboard
elevator platform I3 in
aft inboard lock se, a
an aft outboard lock 62
lock 63 for locking the
its position level with
the ?ight deck when it is not in use or When its
cables are to be renewed.
The aft inboard lock 63 (Fig. 6) comprises a
horizontal cylindrical bolt 64 slidably disposed in
a, housing 65' made in the form of a casting and
securely fastened to the underside of the over
hanging portion of the flight deck. A ?attened
face 65 is provided on the upper side of the look
ing end of the bolt 54 for engaging the underside
of a stop casting 67 mounted in the edge of the
elevator platform. The casting 61, is provided
2,408,762
with an extended lip 68‘ disposed to be locked
between a stopping device or ledge 69 on thelock
housing and the upper face of the lock bolt 64.
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‘64 and 80, is rotatably mounted in a plurality of
pillow blocks 91, 98, 99 and I66, mounted on the
underside of the overhanging edge of the ?ight
deck platform and in a pillow block IIlIIa mounted
The rear end of the bolt 64 is connected by a
. within the ship hull. In order to prevent bind
link TI to. one end of a lever arm ‘I2, the other Cl ' ing of the shaft ‘I3 and its bearings, it is con
end of which is ?xed on an aft outboard lock
structed in several sections connected by univer
shaft ‘I3 so that rotation or rocking of the aft
sal joints IIlI and I02. The lock shaft "I5 at the
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outboard
lock shaft 13 will move the lock bolt
forward end of the elevator platform is rotat
64 into or out of locking position. It will be ob
:10 ably mounted in a plurality of pillow-blocks I63,
served that the lip or stop 68 held between the
lock bolt and the casting ledge 69 has horizontal
?at faces so that it will lock the platform against
vertical reaction'only.
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The forward inboard lock 6| is constructed and
mounted at the forward end of the platform in
the same manner and its 10 ck'bolt "is connected
to a forward‘ outboard lock shaft ‘I5‘by a link ‘I6
I84, I85 and I06, secured at, suitable intervals
on the underside of the overhanging edge of the
?ight deck and in a pillow block Iil6a mounted
within the ship hull. The shaft ‘I5 is, con
structed in several sections which may be con
nected by suitable universal joints I91 and I68 in
order to avoid binding of the shaft in any of its
bearings.
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The means for operating the lock shafts ‘I3 and
The aft outboard lock 62 (Fig. 7) is provided
"I5
comprise an air engine IID mounted within
with a longitudinal cylindrical lock bolt 80 slid 20 the ship hull on a frame I H. The engine is pro
ably' disposed in a housing or casting 8|. The
vided with a piston I I I disposed in a cylinder I I2
housing BI is bolted or otherwise securely fas
for driving a piston rod I I3. The engine is con
tened'to the underside of the overhanging por
nected by inlet and outlet air pipes II4 and H5
and a lever arm 11.
tion of the ?ight deck I5. ‘The upper portion of 2;, by means of which it may be connected to a
the casting 8| is provided with a stopping device
suitable air force (not shown) mounted in the
having a beveled-or downwardly and inwardly
ship.
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retreating face 82‘disposed to engage the down
The outer end of the rod I I3 is ?xed in across
wardly and outwardly extending beveled face 83
head II6 which is slidably disposed one part
of a stop castingv 84 which is bolted or otherwise
of the engine frame Ill. The forward end of
30
?rmly secured to the aft end of the elevator plat
the cross head H6 is connected by a link IIB
form III.
The bottom face 85 of the stop cast
ing 84 is inclined rearwardly and downwardly at
to a clevis H9 on the forward end of’ an inboard
operating rod I26.
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an angle to its face 83. The upper front top por
The guide block H6 is provided with an off
tion 86 of the bolt 86 is cut away at an'angle
set arranged to engage a roller II6A which in
extending outwardly and downwardly for wedg- : turn operates an electric switch IIBB. As the
ing the faces 83 and 86 of the stop casting on
crosshead I I6 moves under the in?uence of power
the edge of the elevator platform between the
rod II3, switch arm IIBA is moved and switch
beveled edge 82 of the lock housing and the lock
N63 is closed, to connect the electric control for
bolt when the lock bolt is moved forward to lock ‘ moving the platform when the locks are unlocked
the platform in its ?ight deck position, so that
and to disconnect it when the lock bolts are
the aft end of the elevator will be tightly locked
moved to their locking position. This arrange
and wedged against the ?ight deck when the lock
bolt is in its locking and wedging position.
ment provides a means for preventing the motor
46 from causing operation of the hoisting en
.The rear end of the bolt 86 is connected by a 45 gine and platform while the platform is locked
link 81 to the upper end of a lever arm 88,’ the
against the flight deck.
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other end of which is ?xed on the outboard lock
The aft end of the operating rod I26 is piv;
shaft ‘I3, so that rotation or rocking of the lock
'otally connected by a link I2I with the upper
shaft ‘I3 willmove the lock bolt 80 into or out of
end of a lever arm I22, the lower end of which
locking position;
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is ?xed on the inner end of the lock shaft ‘IS.
The forwardoutboard lock 63 is constructed
The lever arm I22 isso ?xed on the lock shaft
and mounted at the forward end of the platform
_ in the same manner and its lock bolt 96 is con
nected to the forward outboard lock shaft ‘I5
'i3‘that a reciprocating motion of the operating
rod I20 in the aft direction will rotate or rock
the lock shaft ‘I3 and thereby operate its levers
The lock bolt ‘90‘is
also provided with an outwardly and downwardly 55 ‘I2 and188'to movethe lock bolts 56 and 88 out
by a link 9| and a lever 92.
of their locking position.
‘
r _ Theimeans for rotatably moving the lock shaft
7 “I5 by means of the air engine, comprises a lever
63. V The beveled faces on. the lock bolts and the ~
stop members of the lock 62 and 63 will not only ' ~ I25,'a link I26, and a lever arm IZ'I. The lever
beveled face 93 disposed to engage a beveled face
94 on the stop casting>95 associated with the lock
lock the platform ?rmly in its position at the 60 I25 has its upper end pivotally connected to the
link H8 attached to the rod Ii!!! and its lower
flight deck, but will also wedge it ?rmly against
end pivotally connected to a support I25 mounted
the ?ight deck so that there can be no looseness
on the ship frame. The link I26 has one end
between the ?ight deck and the ship even though
pivotally connected to‘the middle portion of the
there should be warpage of thefiight deck or a
change in size of the notch in the deck due to I 55 lever I25 and its central portion pivotaily con—
nected to the outer end of thelever arm 121,
changes in temperature. This wedging action
the other end of which is ?xed on the inner end
will prevent any battering ram effect of the plat
of the lock shaft '55. With this construction, it
form on the ship due to pitchand roll and, also,
will be observed that a reciprocating movement
to wind and sea. >_ I: '
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It will also be notedzthe links and lever arms Obi the link'II8 by the piston‘ rod I53, toward '
the aftend of the ship will move thetop 0f the
between the lock bolts and the lock shafts form
lever I25 in the. aft direction thereby pulling on
toggle-Ike connectors which exert a. powerful
f
the link'iil? and turning the crank arm l2‘! to
pressure to maintain the bolts in their locking
' rock the shaft ‘I5 and thus operatethe lever arms
position.
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‘
_. {The lock shaft ‘I3 for operating the lock bolts
"I5 ‘I1’ and ‘92 to move the locking bolts ‘I4 and 9-5.‘)
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out of their locking position and into their un
locked position.
A manual means I30 is provided for operating
the locking apparatus at any time when the air
engine fails in operation by reason of failure in
the air supply for it or for any other reason.
The manual means I35 includes a hand lever
I3! having its base end rotatably mounted on
I42 to move the locking member I 43 outwardly
to its unlocking position.
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When the elevator platform is locked in posi
tion at its ?ight deck, the locking bolts must not
be removed from their locking position unless the
oil pressure in the hydraulic engine cylinder 34
is suf?cient to maintain the hoisting cables with
full power to support the platform at the ?ight
one end of a shaft I32 which is rotatably mount
ed in the framework underneath the overhanging 10 deck. Therefore, we have provided an engine in
terlock mechanism I50 for preventing movement
deck I5. vA rest hook I33 is provided for sup
porting the hand lever when it is not in use. A
of the locking bolts to their unlocking position
unless the oil pressure in the engine is su?icient
to
support the elevator platform at the ?ight deck.
by a bolt I35 on the base end of the hand le
The interlock mechanism I50 comprises a hy
ver IS! in position to engage either side of a 15
draulic cylinder I5I (Figs. 5, 8 and 9), a piston
ratchet wheel I36 ?xed on the outer end of the
I52 operatively disposed in the cylinder and a rec
shaft I32, so that the lever may be used for op
tangular
head I53 on the upper end of the piss
erating the pawl to rotate the shaft I32 in either
ton. The cylinder I 5! is mounted by a pair of
direction. A spring biased pin 53? is disposed
in the free end of the pawl for holding it out of 20 supporting members I54 on the lower part of the
engine frame with the piston head I 53 slidably
use when the lever Iél is not being used. A
disposed between a pair of guide blocks I54a and
pinion I35 is ?xed on the inner end of the shaft
two-way pawl E34 (Fig. 11) is pivotally mounted
I52 in position to mesh with a segmental gear I46
I541) on the underside of a portion of the frame
In of the air engine H9. The piston head I53
which is ?rmly ?xed on the locking shaft ‘l5. so
that operation of the hand lever I 3I when the 25 is disposed to engage, when in its lowermost po
sition, a pair of locking hooks I55 and I55a on
pawl I34 is in one of its locking positions will re
the free end of the link yoke I25 which is pivot
tate the pinion I39 and thereby move the seg
ally
connected with the lever I25 and the lever
mental gear to rock the shaft ‘l5 to‘ move the
arm I21 so that the levers and the operating rod
lock bolts into or out of locking position, it being
obvious that the rotation of the shaft 75 to move 30 528 cannot be moved to withdraw the locking
bolts from their locking position unless the pis
the lock bolts ‘id and 53 will also operate the arm
ton head I53 is in its uppermost position.
I21, the link I26, the lever I25 and the operating
The means for raising the piston and piston
rod I212 to rock the shaft ‘I3 for moving the lock
head into their uppermost position to permit un
bolts 64 and 8B.
In order to prevent the lock bolts from being ‘ locking operation of the rod I29 when the engine
is ready to support the platform is a plunger I55
moved into locking position when the elevator
seated in a cavity I5‘! in the lower part of the
platform is not at the ?ight deck, a safety cam
cylinder I5I which is connected by an oil pipe
I42 (Figs. 3, 5 and 10) is pivotally mounted by
line I58 :to the high pressure side of the hydraulic
a bolt I44 on a depending support I 45 and pro
vided with a locking member I43 disposed to co 40 engine. When the hydraulic fluid in the. high
pressure side of the hydraulic engine is at its nor
operate with a lock block It? on they rod I29.
mal
high pressure, that pressure will raise the
The block Bill‘ is fastened to the rod I253 by a
plunger I 56 upwardly and cause it to push up
bolt I48 and it may be adjusted to its correct
position on the rod by loosening the bolt sliding . wardly on the bottom of the piston I52 and thus
raise the piston to move its piston head I53 to
the block along the rod until it is in the correct
its uppermost position out of engagement with
position and then tightening the bolt. The de
the locking hooks I55 and I55a on the operating
pending support I45 is also provided with a hole
link I26.
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which receives the operating rod I 2d and provides
A compression spring i 65 is mounted in the in
a slidable bearing for it.
terior of the cylinder I 52 between a plug IEI slid
A compression spring Ill2a is mounted between
ably disposed in the upper end of the cylinder and
a lip I42b on the safety cam arm and a nut
a
bottom plate I62 which is welded into the bot
and washer M20 on the outer end of a rod I42d,
tom of; the cylinder. The upper end of the plug
the inner end of which is pivotally mounted by a
rests against a bottom section of the air engine
bolt M2e on the depending safety cam support
frame H1. When the piston is moved upwardly
I45. The spring IdZa will bias the safety cami
under the action of the plunger I56, the spring
I42 outwardly into the path of the elevator plat~
I 80 is compressed and stores up energy to bias
form so that the locking member I133 of the safety
the piston £52 downwardly against the pressure
cam device will always be in looking position ex
of the oil in the engine cylinder. The strength
cept when the elevator platform is at the ?ight
of
the compression spring I50. should be so se
deck.
(it) lected that it will counterbalance the pressure
When the lock bolts are withdrawn from their
of the plunger I55 operated by the pressure of the
locking position by movement of the rod 428 in
oil in the engine in such manner that the pis
the aft direction, that movement of the rod moves
ton will be forced upwardly to unlock the bars I 55
the locking block I47 aftward beyond the end of
and I55a only when the oil pressure in the engine
the locking member I43. When the platform
gylinder
is sufficient to support the. elevator plat’
orm.
leaves the ?ight deck,>it releases the cam lever
At times it may happen that vthe oil line I58
I42. Thereupon, the spring I did forces the look
leading to the cylinder I5I is shot away Or other
ing member B43 against the rod I263 back of the
wise damaged while the oil pressure‘ in the engine
block I47 where it will prevent forward move
ment of the rod and the block until the plat.- '
cylinder 34 is still capable of supporting the ele
vator platform. If the oil line I 58 is seriously
form is again moved to the flight deck. Thus
damaged but the oil pressure in the engine cylin
the rod I20 cannot be operated to move the lock
der is still capable of supporting the'platform, the
bolts into locking until the movement of the
piston I52 may be moved upwardly by the hand
platform to the ?ight deck operates the cam lever ~
lever I55 which is pivo-tally mounted on the cyl
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held in “safe” position by the elevator platform
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inder I5I and connected by a push rod I66 with
being at the ?ight deck.v
,the underside of the power head I53 on the up
per end of the piston. As indicated in the draw
ings, if the handle I65 is raised it will push up-'
wardly on the rod I66 and thus raise the power
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. e
It will be assumed now that the platform
is again raised to the ?ight deck and that it
will be locked in position thereat.
As the elevator platform approaches closely to
the ?ight deck it strikes the safety cam I42 and
head I53 out of its locking engagement with the
locking hooks I55 and I55a so that the locking
moves it inwardly, thus moving the locking mem
apparatus may :be operated to withdraw the lock . ber I43 away fromthe rod I26 and out of the
bolts from their locking position.
way of the locking block I41 so that the operat
10
ing rod I26 may be moved in the forward direc
Assumed operation of the apparatus
tion for operating the locking apparatus to lock
It will be assumed now that the elevator plat
form is locked at the ?ight deck in the position
. the platform at the ?ight deck.
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In this operation ofthe locks it will be assumed
shown in Fig. 3, that the hand operating means . - thatfrthe air pressure for the air engine is insuf-_
is disconnected by moving the pawl I34 into its
?cient to operate that engine and that the at- ‘
non-engaging position and resting the hand lever
tendants must operate the manual means I36
against the rest hook I33, and that the oil pres
to‘ effect the desired locking action. In order
sure in‘ the engine .cylinder is sufficient to support
to use the hand means the pawl I34 is thrown
the platform and, therefore, su?icient to main
into engagement with the ratchet wheel I36, then
tain the piston head I 53 above the interlock hooks 20 ‘ the lever I3I is operated back and forth to rotate
I55 and I5-5a. It will be' assumed now that the
the ratchet wheel I36. The rotation of the wheel
attendant desires toiunlock the platform to move ,
I36 rotates the pinion I39 on the segmental gear:
it downwardly and, therefore, operates the air en
I46 and thus rocks the lock shaft 15 to move its:
gine I III to move the lock bolts to their unlocked
links 16 and 9| in the aft direction and thereby
position; ,The operation of the air engine II6
push the locking bolts 14 and 96 into their look
causes its piston III to move in the aft direc
time (Fig. 3) and thereby push its piston rod II3
outwardly.
ing position.
‘ I
'
The rotative movement of the lock shaft 15‘,
(Fig. 5) also moves the 'lever arm I21 to pull
The outward movement of the piston rod car
the
I26 on the lever I25 and thereby pull’
ries with it the guide II6, the link II8, the 30 the link
operating
rod I26 on the lever arm I22 to
lever I25, the clevis II9, the operating rod
cause a rotative movement of the shaft 13. The
I26, 'and the link I2I and thereby rocks the
rotative movement of the shaft 13 causes its
lever arm I22 in anticlockwise direction to rock lever arms 12 and 88 to push on the links H
the lock shaft 13 into open locking position.
and 81 and thereby move the locking bolts 64
This rotative movement of the shaft 13 causes
and 86 into their locking position. Inasmuch as
its lever arms'1.2 and 88 to punch their links
the wedge shaped faces 86 and 93 of the out
H and 81 and thus pull the v\aft inboard‘ lock
board locking bolts 86 and 96 are disposed'in
ing bolt 64 and the aft outboard locking bolt 86
engagement with cooperating wedge faces on the‘
out of their locking position into their unlocked
stop castings on the elevator platform, they will
position. This motion also engages guide block
i I6 with roller I I6A to close switch I I6B to close
the electric circuit to the platform control.
The aft movement of the link II8 carries with
it the upper end of the operating lever I25 thus
pulling the link I26 in the aft direction and
wedge the platform tightly against the ?ight deck
and maintain it in that position regardless of the
action of the elements or any changes in the size
of the elevator notch.
'
From the foregoing description it w'm be ap-'
parent that we have provided an e?icient look
thereby operating the lever arm I21 to cause a
ing apparatus for locking and wedging a deck
corresponding rotative movement of the shaft
edge elevator platform in a parking position at
13. The rotative movement of the shaft 157 causes
the ?ight deck in such manner as to prevent any
its lever arms 11 and 92 to pull on their links
looseness between the platform and the ship so
“:6 and 81 and thus move the forward inboard lock 50 that no battering ram effect can take place be
boltv 14 and the forward‘outboard lock bolt 96 out
tween the platform and the ship when the ship
of their locking position and into their unlocked
rolls and pitches to such an extent that the out
position. The lock bolts are now in their un
board portion of the platform dips into the:
locked position and the platform is supported on
water.
,
the hoisting cables by the hydraulic engine.
_
It will also be apparent that we have provided
The rotative movement of the lock shaft 15
a locking and wedging apparatus for holding a
also rotates a gear segment I46 and this in turn
rotates the pinion I39 of the hand operating
mechanism but this results in no effect because
deck edge elevator platform at its ?ightdeck;l
that such apparatus may be operated either by
hand or a power means; vthat we have provided
the pawl I34 has. been disconnected from the 60 means ‘for interlockingthe locking apparatus
ratchet
wheel
I36.
7'
,
-
,
,
It will be assumed now thatv the platform is
lowered from the ?ight deck to the main deck.
As it leaves the ?ight deck, it moves out of the
way of the safety cam I42 which lfalls downward‘ I
1y under the'effect of the spring. M211 and there
with the hoisting engine in such- manner ' that
it cannot be ‘unlocked unless the oil pressure in‘
the hoisting engine is su?lcient to support the
and that ‘the lock bolts. cannot be
moved to their locking position until the plat
form is in the position in which it. is to be locked.v
platform;
by moves its locking member I43inwardly against
It willalso :be apparent that, with the described
the operating rod I26. The unlocking movement
arrangement of the locks, that the inboard locks
of the locking rod :moves the locking block I41
will carry only vertical forces which will result’
in the aft direction until it is beyond’ the look 70 ' in a low reaction at the aft lock due ‘to water
ing member I43 so that the present movement
drag; that we have provided a wedge shaped
of- the locking member I43 brings it up against
locking means with a power follow-up which will 1
the ‘operating rod back of the locking member
tiethe elevator platform securely to the ship
where it’ will prevent any locking movement of
under all adverse coditions; and that the tog
the operating rod as. long as the Safety cam‘ is 11°‘; vs,
2,408,762
gle arrangement of theoperating devices behind
the lock bolts will exert a high force on the
bolts and will prevent any forces exerted by the
platform from moving the bolts out of their en
gaged position.
Although' we have‘ illustrated and described
only one speci?c embodiment of our invention,
many changes therein and modi?cations thereof
may be made without departing from the spirit
12
-
lock bolt slidably disposed in each housing for
engaging the stop associated therewith, a lock
shaft rotatably mounted on the ship at each end
of the-platform for moving the bolts into and out
of locking position, an operating rod for oper
ating the lock shafts, a means for operating the
operating rod, and an interlocking mechanism
responsive to the condition of the hoisting engine
'
for preventing withdrawal of the locking bolts
from their locking position while the hoisting en
1. In an' elevator, a platform for serving a
gine is not in condition to support the platform.
and scope of the invention.
We claim as our invention:
parking floor, a hoisting engine for operating the
platform, a stop device on the floor for each end
of the platform, to limit its upward movement,
a wedging lock at each end of the platform for
6. In a deck edge elevator for an airplane car
rier ship, an elevator platform for serving a main
deck and a flight deck, a hoisting engine for sup
porting and raising and lowering the platform, a
lock housing mounted in the flight deck at each
end of the platform, a stop mounted on’ea'ch end
the stopping devices on the parking floor, a lock
of the platform opposite the housing thereat, a
ing‘engine for locking and unlocking the locks,
and means for causing the locking engine to exert 20 lock ‘aolt slidably disposed in each housing for
engaging the stop associated therewith, a lock
a continuous pressure on the wedging locks
shaft rotatably mounted on the ship at each end
While they are in their locking position and there
of the platform for moving the bolts into and out
by constantly maintain the platform tightly
of locking position, an operating rod for operat
against the parking floor.
ing the lock shafts, a locking engine for oper~
'2. In an elevator,‘ a platform for serving a
ating the operating rod, a means responsive to
parking ?oor, a hoisting engine for operating the
movement of the platform from the ?ight deck
platform, a plurality of stopping devices on the
for preventing locking operation of the lock bolts
parking floor for each end of the platform, a
until
the platform is positioned at the ?ight deck,
pair of. guide members‘ for preventing lateral
and an interlocking mechanism responsive to the
movement of the platform, a ‘look at each end of
condition of the hoisting engine for preventing
the platform for locking it against the adjacent
withdrawal of the locking bolts‘ from their look
stopping devices on the parking floor and pre
ing position While the hoisting engine is not in
venting, more than a limited vertical movement
condition to support the platform.
of the platform, a Wedging look at each end of
wedging and locking the platform tightly against
7. In a deck edge elevator for an airplane car
the platform for Wedging the platform tightly
rier ship,
against the adjacent stopping devices on the
locking the locks.
elevator platform for serving a main
deck and a flight deck, a hoisting engine for
parking floor, and means for locking and un
supporting and raising and lowering the plat
,
form, a lock housing mounted in the ?ight deck
3. In an elevator, a platform for serving a
at each end of the platform, a stop mounted on
parking ?oor, a hoisting engine for operating the
platform, a plurality of locks for locking the plat
form at the parking ?oor, means for locking and
each end of the platform opposite the housing
thereat, a lock bolt slidably disposed in each
housing, for engaging the stop associated there~
unlocking the looks, a means responsive to move
ment of the platform from the parking floor for
With, said housings, stops and lock bolts having
preventing locking operation of the locks while 45 beveled faces to wedge and lock the platform
tightly against the flight deck when the bolts
the platform is away from the parking floor, and
are
in their locking position, a lock shaftrotat
an interlocking mechanism ' responsive to the
ably mounted on the ship at each end of the
condition of the hoisting engine for preventing
platform, a link and lever arm'connecting each
unlocking of the locks while the hoisting engine
lock bolt to the lock shaft at its end of the platform,
is not in condition to operate the platform.
4. In an elevator, a platform for serving a
50 an operating rod, a plurality of‘ links and lever
arms connecting the operating rod to the lock
shafts, and a locking engine connected to the op
platform, a pair of guide members for prevent
erating rod for moving it to, rock the lock shafts
ing lateral movement of the platform, a lock at
and'thereby move the lock bolts into and out of
each end of the platform for looking it at the 55 their
locking position.
parking ?oor and preventing more than a lim
8. In a deck edge elevator for an airplane car
ited vertical movement, of the platform, a wedg
rier ship,‘ an elevator platform for serving a main
ing look at, each end of the ‘platform for wedg
deck and a flight deck,-a lock housing mounted in
ing the platform tightly against the ‘parking
?oor, means, for locking and unlocking the locks, 60 the ?ight deck at each end of the platform, a
stop mount-ed on ‘each end of the platform-oppo
a means responsive to movement of'the platform
parking floor, a hoisting engine for operating the
from the parking, floor for preventing locking
operation of the locks while the platform ‘is
away from the parking floor, and an interlock
ing mechanism responsive to the condition of
the hoisting ‘engine for preventing unlocking of 65
thelockswhile the hoisting engine is not in con
site the housing thereat, a lock bolt slidably dis
posed in each housing for engaging the stop as
sociated therewith, said housings, stops and lock
bolts having beveled faces disposed to wedge and
lock the platform tightly against the flight deck
when the bolts are in their locking position, a
lock shaft rotatably mounted on the ship at each
end of the platform, a link and lever arm con
necting each lock bolt to the lock shaft at its
rier ship, an elevator platform'for serving a main
deck and a flight deck, a hoisting engine for sup 70 end of the platformtan operating rod, a plu
dition‘ to support the'platform.
'
_ 5;‘ In a deck edge elevator for an airplane car
porting and raising and lowering the platform, a
lock housing mounted in the ?ight deck at each
end of the platform, a stop mounted on each end
of the platform opposite the housing there'at, a
rality of links. and lover ‘arms connecting the
operating rod to the lock shafts, a locking engine
connected to the operating rod for moving it to
rock the lock shafts and ‘thereby move the lock
bolts into and out of their locking position, and’
2,4983%
‘
13
a means responsive to movement of the platforme
from the ?ight deck for preventing locking oper
ation of the locking bolts until the platformv is
positioned at the ?ight deck.
,
14
outboard stop mounted on each end of the platr
form opposite the'outboard housing thereat, a
lock bolt slidably disposed in each outboard hous
ing for engaging the outboard stop associated
) therewith, said outboard housings, outboard stops
r
9. In a deck edge elevator for an airplane car
rier ship, an elevator platform for serving a main
and outboard lock bolts having beveled faces to
wedge and lock-the platform tightly against the
deck and a ?ight deck, a hoisting engine for sup
porting and raising and lowering the platform, va
lock housing mounted in the ?ight deck ateach
end of the platform, a stop mounted on each end"
of the platform opposite the housing thereat,.a
lock bolt slidably disposedin each .housing for,
?ight deck when the bolts are in their locking
position, a lock shaft rotatably mounted on the
ship at each end of the platform, a link and lever
arm connecting each lock bolt to1 the lock shaft
at its end. of the platform, an operating rod, a
plurality
of links and lever arms connecting the
engaging the stop associated therewith, . said
operating rod to the lock shafts, and a locking
housings, stops and lock bol'tshaving beveled I
engine connecting to the operating rod for mov
faces disposedto wedge and lock the platform 15 ing it'to rock the lock shafts and thereby move
tightly against the ?ight deck when the bolts are
in their locking position, a lock shaft rotatably
the lock boltsinto and out of their locking posi
mounted on the ‘ship at each end of the platform,
tion.
a link and lever arm connecting each lock bolt
to the lockv shaft at its end of the platform, an
'
carrier ship, an elevator platform for serving a
main deck and a ?ight deck, a hoisting engine for
operating rod, a plurality of links and lever arms
supporting and raising and lowering the plat
' 12. In a ,deck edge elevator for an airplane
connecting the operating rod to the lock shafts,
form, an inboard lock housing mounted in the
a locking engine connected to the operating rod
?ight deck at each end of the platform, an in
for moving it to rock the lock shafts and thereby
board stop mounted at each end of. the platform
move the lock bolts into and out of their locking 25 opposite the inboard housing thereat, a lock .bolt
position, vand an interlocking mechanism respone
slidably disposed in each inboard housing for
sive to the condition of the hoisting engine for
engaging the inboard stop associated therewith,
preventing withdrawal of the locking bolts from
said inboard housing, inboard stops and inboard,
their locking position while the hoisting engine is
bolts having horizontal ?at cooperating faces for
30 preventing vertical movement but permitting a
not in condition to support the platform.
' 10. In a deck edge elevator for an airplane car
limited horizontal movement of the platform, an
rier ship, an elevator platform for serving a main
outboard lock housing mounted in the flight deck
deck and a'flight deck, a hoisting engine for sup
' at each end of the platform, an outboard vstop
porting and raising and lowering the platform, an
mounted on each end of the platform opposite
inboard lock housing having a stopping member 35 the outboard housing thereat, a lock bolt slidably
mounted in the ?ight deck at each end of the
. disposed in each outboard housing for engaging
platform, an inboard stop mounted at each end
the outboard stop associated therewith, said out
of the platform opposite the inboard housing
board housings, outboard stops and outboard lock
thereat, a lock bolt slidably disposed in each in
bolts having beveled faces to wedge and lock the
board housing for engaging the inboard stop 410 platform tightly against the ?ight deck when the‘
associated therewith and looking it against the
bolts are in their locking position, a lock shaft
stopping member on the housing, an outboard
rotatably mounted on the ship at each end of
lock housing having a stepping member mounted ‘ the platform, a link and lever arm connecting
in the ?ight deck at each end of the platform, an
each lock bolt to the lock shaft at its end of the
outboard stop mounted on each end of the plat
platform, an operating rod, a plurality of links
form opposite the outboard housing thereat, a
and lever arms connecting the operating rod to
lock bolt slidably disposed in each outboard hous
the lock shafts, a locking engine connected to the
ing for engaging the outboard stop associated
operating rod for moving it to rock the lock shafts
therewith and locking it against‘ thestopping
and thereby move the lock bolts into and out of,
member on that outboard housing, a lock shaft 50 their locking position, and manual means for
rotatably mounted on the ship at each end of
operating the operating rod to move the bolts into
the platform, a link and lever arm connecting
and out of locking position upon failure of the
each lock bolt to the lock shaft at its end of the
platform, an operating rod, a pluralityrof links
and lever arms conneoting‘the operating rod. to
the lock shafts, and ,a locking engine connected
to the operating rod for moving it to rock the
lock shafts and thereby move the lock bolts into
and out of their locking position.
v
locking engine.
13. In a deck edge elevator for an airplane car;
rier ship, an elevator platform for serving a main
deck and a ?ight deck, ahoisting engine for sup
porting and raising and lowering the platform,
can inboard lock housing mounted in the flight
deck at each end of the platform, an inboard
11. In a deck edge elevator for an airplane 60 stopmounted at each end of the platform oppo- 1
carrier ship, an elevator platform for serving a
site the inboard housing thereat, a lock bolt slid
main deck and a ?ight deck, a hoisting engine
ably disposed in each inboard housing for engag
for supporting and raising and lowering , the
ing the inboard stop associated therewith, said
platform, an inboard lock housing mounted in
inboard housings, inboard stops and inboard bolts,
I
the ?ight deck at each end of the platform,v an 65 having horizontal ?at cooperating faces for pre
inboard stop mounted at each end of the plat
venting vertical movement but permitting a lim
form opposite the inboard housing thereat,‘ a lock
ited horizontal movement of the platform, an
bolt slidably disposed in each inboard housing
outboard lock housing mounted in the ?ight deck
for engaging the inboard stop associated there
at each end of the platform, an outboard stop
with, said inboard housings,,inboard stops and 70 mounted‘ on each end of the platform opposite
inboard bolts having horizontal ?at, cooperating
the outboard, housing thereat, a lock bolt slidably
faces for preventing vertical movement but per
disposed in each outboard housing for engaging
7 limited horizontal movement of the ' the outboard stop associated therewith, said out;
mitting a‘
platform, an outboard lock housing mounted in.
board housings, outboard stops and outboard lock'_
the ?ight deck at each end of the'p1atform,'an 75
bolts having beveled faces to wedge and lock the
platform tightly against the ?ight deck when the
bolts are in their locking position, a lock shaft
rotatably mounted. on the ship at each end of
the platform, a toggle like link and lever arm
connecting each lock bolt to the lock’ shaft at
its end of the platform, an operating rod, a plu
rality of links and lever arms connecting the op
16
crating rod to the lock shafts, a locking engine
connected to the operating rod for moving it‘ to
rock the look shafts and thereby move the lock
bolts into and out of their locking position, means
for supplying a constant power to the locking
engine to maintain the outboard lock bolts in
tight wedging position while they lock the plat
form at the ?ight deck, and a means responsive
erating rod to the lock shafts, a locking engine
connected to the operating rod for moving it to 10 to movement of the platform from the ?ight deck
for preventing locking operation of the locking
rock the lock shafts and thereby movethe lock
bolts until the platform is positioned at the ?ight
bolts into and out of their locking position, and
deck, and an interlocking mechanism responsive
means for supplying a constant power to the look
to the condition of the hoisting engine for pre
ing engine to maintain the outboard lock bolts
in tight wedging position while they lock the 15 venting withdrawal of the locking bolts from
their locking position while the hoisting engine
platform at the flight deck.
is not in condition to support the platform.
14. In a deck edge elevator for an airplane
16. In a deck edge elevator for an airplane
carrier ship, an elevator platform for serving a
carrier ship, an elevator platform for serving a
main deck and a ?ight deck, a hoisting engine
main deck and a flight deck, a hoistingengine
for supporting and raising and lowering the plat
for supporting and raising and lowering the plat~
form, an inboard lock housing mounted in the
form, an inboard lock housing mounted in the
?ight deck at each end of the platform, an in
flight deck at each end of the platform, an in
board stop mounted at each end of the platform
board stop mounted at each end of the platform
opposite the inboard housing thereat, a lock bolt
slidably disposed in each inboard housing for en 25 opposite the inboard housing thereat, a lock bolt
slidably disposed in each inboard housing for en
gaging the inboard stop associated therewith, an
gaging the inboard stop associated therewith, said
outboard lock housing mounted in the ?ight deck
inboard housings, inboard stops and inboard lock
at each end of the platform, an outboard stop
mounted on each end of the platform opposite
bolts having ?at horizontal cooperating faces for
the outboard housing thereat, a lock bolt slid 30 preventing vertical movement of the platform, an
outboard lock housing mounted in the ?ight deck
ably disposed in each outboard housing for en
at each end of the platform, an outboard stop
gaging the outboard stop associated therewith, a
mounted on each end of the platform opposite
lock shaft rotatably mounted on the ship at each
the outboard housing thereat, a lock bolt slidab-ly
end of the platform, a toggle like link and lever
disposed in each outboard housing for engaging
arm connecting each lock bolt to the lock shaft
the outboard stop associated therewith, said out
at its end of the platform, an operating rod, a
board housings, outboard stops and outboard lock
plurality of links and lever arms connecting the
bolts having beveled faces to wedge and lock the
operating rod to the lock shafts, a locking en
platform tightly against the flight deck When the
gine connected to the operating rod for moving
bolts
are in their locking position, a lock shaft
it to rock the lock shafts and thereby move the 40
rotatably mounted on the ship at each end of the
lock bolts into and out of their locking position,
platform, a toggle like link and lever arm con
means for supplying a constant power to the
necting each lock bolt to the lock shaft at its end
locking engine to maintain the outboard lock
of the platform, an operating rod, a plurality of
‘bolts in tight wedging position while they lock
links and lever arms connecting the operating
the platform at the flight deck, andan interlock
ing mechanism responsive to the condition of the ‘ rod to the lock shafts, a locking engine connected
to the operating rod for moving it to rock the
hoisting engine for preventing withdrawal of the
lock shafts and thereby move the lock bolts into
locking bolts from their locking position while
and out of their locking position, means for sup
the hoisting engine is not in condition to support
plying a constant power to the locking engine to
the platform.
maintain the outboard lock bolts in tight wedging
15. In a deck edge elevator for an airplane
position while they look the platform at the flight
carrier ship, an elevator platform for serving a
main
and a flight deck, a hoisting engine
for supporting and raising and lowering the
platform, an inboard lock housing mounted in .
the ?ight deck at each end of the platform, an
inboard stop mounted at each end of the platform
opposite the inboard housing thereat, a lock bolt
slidably disposed in each inboard housing for en
deck, a safety cam responsive to movement of the
platform from the flight deck for preventing a
locking operation of the locking bolts until the
- platform is positioned at the flight deck, and an
interlocking mechanism responsive to the condi
tion of the hoisting engine for preventing with~
drawal of the locking bolts from their locking po
sition while the hoisting engine is not in condition
gaging the inboard stop associated therewith; an 60 to support the platform.
outboard lock housing mounted in the ?ight deck
at each end of the platform, an outboard stop
mounted on each end of ‘the platform opposite
the outboard housing thereat, a lock bolt slidably
disposed in each outboard housing for engaging
the outboard stop associated therewith, said out--v
board housings, outboard stops and outboard lock
bolts having beveled faces to wedge and lock the
platform tightly against the flight deck when the
bolts are in their locking position, a lock shaft
rotatably mounted on the ship at each end of
the platform, a toggle like link and lever arm
connecting each lock bolt to the lock shaft at itsv
end of the platform, an operating rod, a plural
ity of. links and lever arms connecting. the op
17. In an elevator, a platform for serving a
parking door, a plurality of stopping devices on
the parking floor, a hoisting engine for operating
the platform, a look at each end of the platform
‘ for locking the
platform against the stopping de-_
vices on the parking floor, and a locking engine
for locking and unlocking the locks, means re~
sponsive to operatingof the locks to lock the plat
form at the parking ?oor for preventing opera-l
tion‘ of the hoisting engine while the locks are in
locked condition.
'
18. In an elevator, a platform for serving a:
parking ?oor, a hoisting engine for operating the
platform, a lock at each end of the platform’ for
' locking. the ‘platform
against the parking fl0or,,
2,408,762
dition, and a means responsive to the absence of
ineans responsive to operating or the locks to lock
the platform at the parking ?oor for preventing
operation of the hoisting engine while the locks
the platform from the parking floor for prevent-—
ing a locking operation of the locking bolts until
the platform is positioned at the parking ?oor.
are in locked condition, and an interlocking
20. In an elevator, a platform- for serving a
mechanism responsive to the condition of the
hoisting engine for preventing the locks from be
ing unlocked while the hoisting engine is not in
condition to support the platform.
parking'?oor, a plurality of stopping devices on
the parking floor, a, hoisting engine for operating
the platform, a look at each end of the platform
for locking the platform against the stopping de
19. In an elevator, a platform for serving a
vice on the parking floor, a locking engine for
parking ?oor, a plurality of stopping devices on 10 locking and unlocking the locks, and a means
responsive to the absence of the platform from
the parking floor, a hoisting engine for operating
the parking floor for preventing a locking opera
the platform, a look at each end of the platform
tion of the locks until the platform is positioned for locking the platform against the stopping den
vices on the parking ?oor, means responsive to
15 at the parking floor.
JAMES DUNLOP.
operation of the locks to look the platform at the
LENNIE R. RISSLER.
parking floor for preventing operation of the
hoisting engine while the locks are in locked con
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