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Патент USA US2130354

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Sept. 20, 1938.
N, B. MADSEN.
‘
2,130,354
AUTOMATIC LIFTING MECHANISM
Filed May 16, 1938
3 Sheets-Sheet l
- [12 ven for
Neil B. Mad-sen
By
SePt- 20, 1938.
N. B. MADSEN
2,130Q354
AUTOMATIC LIFTING MECHANISM
Filed May 16, 1938
3 Sheets-Sheet 5
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Invenz‘or
Neil B. Ma‘dsen
Attorney
Patented Sept. 20, 1938
2,136,354 »
EN’JTED STATES FATENT OFFICE
2,130,354
.
AUTOMATIC LIFTING MECHANISM
Neil B. Madsen, Portland, Oreg.
I
Application May 16, 1938, Serial No. 208,256
14 Claims. (CI. 61-28)
(Granted under the act of March 3, 1883, as
amended April 30, 1928, 370 O. G. 757)
nism shown in Fig. 2, taken on line 3—3 and in
The invention described hereinvmay be manu
factured and used by or for the Governmentfor
governmental purposes without the payment to
me of any royalty thereon.
This invention relates to an automatic lifting
mechanism for use, with hoists, cranes or other
lifting devices, in connection with a load or loads
requiring repeated and systematic engagement
and disengagement.
The device as hereinafter described relates spe‘
the arrangement and position ofthe parts when 5
detached from a load.
Fig. 5 is a view of the mechanism shown in
Fig. 4, showing the arrangement and position of
the parts when about to engage a load.
Fig. 6 is a View of the mechanism shown in 10
ci?cally to engaging, disengaging, and lifting
Fig. 4, showing the arrangement and position of
means for use with cranes, or the like, whereby a
the parts when a load has been engaged.
Fig. 7 is a view of the mechanism shown in
load comprising a spillway gate, emergency gate,
or similar structure may be readily engaged for
' elevation and transportation to a predetermined
location, and when so placed in desired position
and elevation may be readily disengaged, the
various steps in the cycle of engagement and
disengagement being automatically performed
by the manipulation of the elevation of the
engaging and lifting means with reference to the
load.
3
the direction indicated.
Fig. 4 is a fragmentary View, partly in section,
of a unit of automatic lifting mechanism showing
This device may be used in single units or in
any desired multiples thereof as hereinafter dis
closed.
The primary object of this invention is to pro
vide means whereby the lifting member of a
gantry crane or the like may be automatically
engaged with a designated gate for the purpose of
effecting a desired change in gate elevation or
position, and then be disengaged from the gate,
by the manipulation of the lifting member rela
tive thereto.
A further object of this invention is to provide,
in in a spillway gate assembly comprising a plurality
of superimposed segments, means whereby the
individual segments may readily be connected to
their fellows, or disconnected therefrom prepara
tory to being moved.
Other objects of the invention will become
apparent in the following description which,
with the accompanying drawings, discloses a pre
ferred embodiment of my device.
In the drawings:
Fig. 4, showing the arrangement and position of
the parts when set to disengage a load.
15
Similar reference characters refer to similar
parts throughout the several views.
In Fig. 1, dam I is equipped with a crest 2 above
which spaced piers 3 and 3a arise, providing a
spillway 4 through which a flow of water may 20
discharge over the crest 2. A suitable spillway
gate, as one comprising a lower segment 5 upon
which is superimposed an upper segment 6, is
provided whereby the discharge area of the spill
Way 4 may be controlled. The spillway gate is 25
suitably restrained against other than vertical
movement, by any of the, well known means ordi
narily employed for this purpose.
It is to be noted that, in place of two gate seg
ments as lower segment 5 and upper segment 6, 30
a spillway gate may comprise a single segment,
in which the construction would be substantially
as shown for lower segment 5. However, condi
tions might indicate the use of a gate having more
than two segments, in which case the additional 35
segments would each be constructed substan
tially as shown for segment 6. In general, the
number of segments required for a gate will be
determined by the available clearance between
the deck of the dam structure and the upper limit 40
of‘ travel of the means, as a gantry crane, used
for placing and operating the gates. Should the
height of the gate exceed the available clearance,
the multiple segment constructions would be
ordinarily’required; whereas the use of a gate 45
Figure l is a fragmentary elevation, partly in
section, through a bay of a spillway dam, and
shows a spillway gate assembly together with a
the dam structure by the placing and operating
multiple
means provided.
assembly
of
our
automatic
lifting
mechanism, in operative position therein.
Fig. 2 is an enlarged fragmentary sectional
elevation of the lifting and engaging mechanism
shown in Fig. 1. This view is taken on line 2--2
of Fig. 3 and in the direction indicated.
Fig. 3 is a sectional end elevation of the mecha
comprising a single segment would normally be
indicated if such a gate could be lifted clear of
For supporting the spillway gate in other than 50
closed position, suitable means are provided, as
lower latches ‘l and 8 and upper latches 9 and IE},
pivotally mounted in a vertical plane in the piers
3 and 3a. These latches are adapted to engage
with suitable projections from the ends of the 55
N
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CR
0.r
2,130,354
segments as spaced rack bars H and I2
nted upon segment 5 and spaced rack bars l3
of the sear 35, and is so positioned relative there
it mounted upon segment 6. Suitable means,
to that when the crosshead l9 approaches the
guide beam upper stops 24, the trigger screw 40
at here shown, are provided whereby these
latches, when not loaded, may be pivotally raised
to clear the spaced rack bars, permitting vertical
the heavy end 38 clear of engagement with the
link stop 32.
travel of the gate or gate segments.
When it is desired to‘ completely close the spill
will engage the light end of the sear and raise
It is to be observed that each of the guide
beam crossheads l9, together with the associated
way, the spillway gate is lowered until bottom links, link pins, sear, and lifting pin, is arranged
seal it, terminating segment 5, is brought into’ to move in unison with the hoisting means as
contact with the crest 2. The area of the spill
way opening may thus be controlled over a range
of from no flow to maximum flow by increments
of the vertical spacing of rack bars ‘H, I2, 13
15 and. M.
It is to be understood that Fig. 1 shows only a
portion of a dam, the number of piers and of
gates, and also the number of segments per gate,
being dependent upon the design requirements of
the structure.
The spillway gate is raised or lowered as re
quired by suitable hoisting means as sheave blocks
it, here shown as two in number, connected by
cables ll to a gantry crane or the like, not here
', shown, adapted to move along a deck superstruc
ture, likewise not shown, superimposed upon the
spaced piers of the dam as 3 and 3a. Each of
the sheave blocks I6 is connected by suitable
means, as by lifting pin l8, to a crosshead 19,
formed by spaced crosshead plates 20. The cross
heads l9 are held in spaced relation by guide beam
23, provided at each of its ends with vertically
disposed transverse diaphragms 22 upon which
are mounted vertical guide angles 23. The spaced
crossheads l9 are so disposed between the dia
phragms and guide angles that they are re
strained from all relative displacement therewith
except in the vertical plane, in Which their dis
placement is limited by guide beam upper stops
40 24 and guide beam lower stops 25, all of which
are ?xed to the guide beam 2|.
Coacting links 2‘! and 28 are disposed between
and normally depend vertically from the spaced
crosshead plates 29 being pivotally mounted upon
parallelly disposed link pins 29 secured thereto
in a horizontal plane. Each of the links 21 and
23 is provided at its lower end with a cylindrical
load bearing member 30, and at about its mid
section with a link camming surface 3|. The
50 upper end of link 2'! is provided with a link stop
32, and that of link 28 with a link arm 33. Equal
and opposite synchronized angular displacement
of links ‘El and 28 is provided for by meshed gear
teeth 31? radially disposed upon the links 21 and
23 about the axes of link pins 29. In order to
limit to a desired minimum the mutual approach
of the links, suitable coacti-ng stops as lobes 35
may be provided.
A sear 33, suitably pivoted near its midpoint
60 on sear pin 3? mounted in spaced crosshead plates
25, is disposed with its heavy end 38 adjacent the
link stop 32 and its light end 39 toward one of
the diaphragms 22. The arrangement of the
sear 35 is such that upon sui?cient angular dis
placement or" the links 27 and 28 from the ver
tical about the axes of the link pins 29, the
link stop 32 will clear the heavy end 38 ‘of the
sear, permitting it to drop and retain the links in
displaced position until the light end 39 of the
70 sear is depressed, raising the heavy end 38 and
releasing the link stop and permitting the links
to resume their original substantially vertical po
sition. A suitable trigger means, as trigger screw
43 adjustably secured in bracket 4|, is mounted
75 upon that diaphragm 22 adjacent the light end 39
represented by the sheave blocks and, except as
limited by the stops 24 and 25, independent of
the guide beam 2|.
The gate upper segment 6 is provided with up
per lifting hooks 42 each arranged in vertical
alignment with the crossheads I9. Each of the
hooks 42 is provided at its upper end with a sister
hook arrangement comprising a pair of re-en
trant arcuate surfaces 43 adapted to be engaged
by the cylindrical load bearing members 30 of the
links .21 and 28. The top of the hook 42 forms
a. hook camming surface 44. The shank of hook
42 is loosely positioned longitudinally and trans
versely within the gate upper segment 6 by means
of spaced longitudinal members 45, forming a
part of the structure of gate section 6, and spaced
transverse members 46 aflixed members 45. The
hook 42 is, for normal operation, positioned ver
tically by means of a wedge 41 disposed upon
bearing plate 48, which in turn is mounted upon 30
the top surface of the longitudinal members 45.
Pierced cars 49 are a?ixed to members 45 and ex
tend upwardly therefrom, and in alignment with
an aperture 50 piercing the shank of hook 42,
adapted to receive the wedge 47. The aperture 85
50 is so- positioned that when wedge 41 is in
place the hook camming surface 44 and re-en
trant arcuate surfaces 43 are properly positioned
for engagement by the cylindrical load bearing
members 30 of the links 21 and 28, as herein
after ‘described. To facilitate the manipulation
of the wedge 41, a jack screw 5|, suitably dis
posed in the wedge as shown, may be provided.
40
The lower end of the hook 42 terminates in an
eye, through which is disposed a crosshead pin .
52, from which is suspended gate segment cross
head 53. The details of gate segment crosshead
53 are in all respects similar to those of guide
beam crosshead Hi.
It is to be noted that when the wedge v4‘! has , -
been withdrawn the upper lifting hook 42 and
the gate segment crosshead 53 are vertically dis
placeable relative to the gate upper segment 6
within limits set by gate segment upper stop 54
and gate segment lower stop 55. The excursion
of crosshead 53 between stops 54 and 55 is sub
stantially equal to that of crosshead 19 between
stops 24 and 25.
In order to assure uniform displacement of the
two sets of links, 27 and 28, mounted one set in
each of the crossheads l9, and also of the similar
links mounted in each of the crossheads 53, an
interlocking mechanism may be provided con—
necting the respective sets of links through the
link arms 33. The interlocking mechanism con
sists of a rectifying lever 56 pivoted at its mid
point about midway between the crossheads and
connected from its ends via connecting rods 51
to floating levers 58 and thence by means of
?oating rods 59, reversing levers 60, and con 70
necting links 6| to the link arms 33. A detach
able handle 62, adapted to engage an end of
rectifying lever 56, may be provided to permit
the manual separation of pairs of links 21 and 28.
The gate lower segment 5 is provided with 75
2,130,354.
lower lifting hooks 63 each arranged in vertical
alignment with the guide beam crossheads l9
and the gate segment crossheads 53. Each of
the hooks 53 has a pro?le at its upper end in all
respects similar to that of hooks 52. At their
lower ends, hooks 63 are pivotally secured to the
gate lower segment 5 by means of lower hook pin
64, mounted in longitudinal members 65 which
form a part of the structure of the segment.
10 Stop angles 55, secured to members 55, are pro
vided to maintain lower lifting hooks 63 in ap
proximately vertical position.
3
58, connecting rods 57 and rectifying lever 56.
It is to be noted that, with two crossheads being
operated in unison in a guide beam as shown, the
interlocking mechanism assures synchronized
functioning of the two sets of links.
After the crossheads have been lowered to the
lower stops and the links spread and engaged in
spread position by the sear, the crossheads are
raised, through the reversing of the direction of
motion of the sheave blocks E5, the cylindrical 10
load bearing members 30 clearing the reentrant
arcuate surfaces 43 of the hooks, until the guide
To assure proper alignment between guide beam upper stops 24 are contacted. Continued
beam 2! and gate segments 5 and/or 5, and also hoisting causes the guide beam to be raised, via
the upper stops, until it clears and is free from the
15 between adjacent gage segments, suitable
chamfered pilot pins 61 may be a?ixed to and spillway gate. Just prior to the contacting of
project upwardly from the top surfaces of the’ the upper stops by the crossheads, the light ends
gate segments, engaging with complementary 39 of the sears 36 contact the trigger screws 45,
beveled sockets affixed to the bottom surfaces of displacing the heavy ends 38 from engagement
the guide beam and of the gate upper segments. with the link stops 32 and permitting the links to
The operation of the mechanism of the device assume substantially vertical positions, their
is as follows: Referring to Fig. 1, the gate lower mutual approach being limited by the stop lobes
35. The relative positions of the various parts at
segment 5 is shown supported on lower latches
l and 8. Gate upper segment 6 is disposed on this stage of the cycle of operation are clearly dis
closed in Figure 4. It is to be noted that, while in
25 the lower segment 5 and locked thereto through
the engagement of lower lifting hooks 63 by links the embodiment disclosed the force of gravity is
2'5’ and 28 of crossheads 53. These crossheads utilized to return the links to the position shown,
are keyed in this engaged position by Wedges 41, other suitable means might be employed, such as
disposed through the apertures 55 in the shanks springs or the like.
The lifting mechanism and guide beam is now
30 of the upper lifting hooks 52, as shown in greater
detail in Figs. 2 and 3. The gate segments 5 and clear of the spillway gate and in condition to en
5 are maintained in alignment by means of the
pilot pins 6? and pilot sockets 68. It is to be
noted that the pilot pins 51 are provided with
35 tapered or chamfered noses, adapted to engage
the beveled pilot sockets 58 under conditions of
some misalignment upon their approach, and
further adapted to correct such misalignment of
the gate segments prior to ?nal contact there
40 between. As shown in Fig. 1, guide beam 2! is
positioned on the gate segment 6, the guide beam
crossheads l9 being engaged with the upper lift
ing hooks 52 by means of the links 21 and 28,
and in turn being supported by the sheave blocks
45 l5 suspended by the cables H from conventional
hoisting and traveling means not shown, as a
gantry crane.
The relative positions of the
mechanism as shown are those assumed either
immediately after the spillway gate has been
50 lowered upon the latches l and 8, or immediately
before the gate has been lifted therefrom. The
position of members under these conditions is
shown on an enlarged scale in Figures 2 and 3,
and the disposition of parts within the crossheads
is shown in Figure 6.
Assuming that the spillway gate has just been
lowered upon the latches ‘l and 8, the gate is
released by the lifting mechanism through the
further slight lowering of the crossheads l9, by
(30 means of the sheave blocks 55, until guide beam
gage another gate or reengage the ?rst.
in Figure 4. Continuing to be lowered, the pilot
pins 6? engage the pilot sockets 58; bringing the
guide beam and the gate ?rst into the required
degree of alignment and then into mutual con
tact. Continued lowering causes the crossheads 40
to leave the upper stops, thus bringing the under
sides of the cylindrical load bearing members 30
into contact with the hook camming surface M,
along which they slide. This causes the links to
separate, as is clearly shown in Figure 5. Con 45
tinued lowering of the lifting mechanism causes
the members 35 to drop clear of the camming
surface 515, after which the links will mutually ap
proach and bring the members 35 within the
range of reentrant arcuate surfaces 53. The lift 50
ing mechanism, if then raised slightly, positions
the various parts as shown in Figure 6, thus com
pleting the cycle of disengagement and reen
gagement. The spillway gate may now be lifted
clear of the piers 3 and 3a and moved as de
in spread position, through the medium of the
gear teeth 35 and/or the interlocking mechanism
comprising link arms 33, connecting links 6|, re
75 versing levers 60, ?oating rods 59, ?oating levers
55
sired, or it may be raised to a different elevation
and relatched, or it may be lowered, as required.
It is to be noted that, to permit the gate to be
placed at a lower level, it will ?rst-have to be
elevated sufficiently to permit the latches ‘i, 8, 9
rack bars ii, l2, l3 and M, respectively.
To separate the components of a segmental
'7, thus e?ectively maintaining all of the links
30
gate in approximate alignment therewith, the
details of the mechanism being disposed as shown
and iii to be swung vertically into the clear of
permit the heavy end 38 of sear 36 to drop into
engagement therewith, as clearly shown in Figure
25
In so
This causes link
also displaces the link stops 32 sufficiently to
20
doing, the lifting mechanism is lowered over the
camming surfaces 5i to engage hook camming
surfaces 54, causing the links to spread, as shown
in Figure '7, thus positioning the cylindrical load
65 bearing members 35 of the links without the
lines of engagement with reentrant arcuate sur
faces 43 of the hooks. The spreading of the links
lower stops 25 are contacted.
15
gate, as 5 and 5, the lifting mechanism is en
gaged with the upper segment lifting hooks as 65
described immediately above. The wedges 57 are
then removed, which operation may be facilitated
by the use of the jackscrews 5!. This operation
will be further facilitated by raising the hoist
blocks it slightly, thus stressing the lifting hooks 70
and utilizing the resultant strain to relieve the
wedge. Upon removal of the wedges the hoist
blocks are lowered, which causes crossheads l9
to be lowered, with hooks 42 and crossheads 53
moving in unison therewith, hook 42 no longer 75
2,130,354
being restrained by the wedge 41. Since the hook
42 under these conditions moves in unison with
the links 28 and 29 depending from the guide
beam crossheads 19, no contact occurs between
their camming surfaces 44 and 3|. However,
with the wedges 41 removed, lower crossheads 53
and the parts associated therewith function
toward lower segment lifting hooks B3 in all re
spects as hereinbefore described for crossheads
10 l9 and upper segment lifting hooks 42, when the
ing mechanism is raised sufficiently for the hooks
4.2 to .become stressed, when the wedges 41 are
placed, thus securing the hooks relative to the
gate structure and transferring to the crossheads
IS the engaging and disengaging phases of the
cycle of operation.
While the mechanism described is a preferred
embodiment of my invention, it is to be under
stood that I do not wish to be limited to the pre
cise form disclosed, since numerous modi?cations 10
latter are restrained by the wedges. Thus the
crossheads 53 contact the lower stops 55 and as
sume a position and arrangement of parts similar
may be effected in the instrumentalities employed,
but I do wish to include all mechanical equiva
lents and arrangements of parts that may fairly
to that shown in Figure "7 for upper crossheads.
be considered to come within the scope and pur
view-0f my invention as de?ned in the appended 15
15 The lifting mechanism is then raised, the cross
heads 53 contacting the upper stops 54 and as
suming a position and arrangement of parts simi
lar to that shown in Figure 4, the upper segment
6 being disconnected from the lower segment 5
20 and free to be raised independently thereof. It
will be evident that the crossheads l9, moving in
unison with the crossheads 53, will also approach
or contact upper stops 24, but as there is no rela‘
tive movement between the camming surfaces 3| ,
25 of the links depending from the crossheads l9,
and the camming surfaces 44 of the upper hooks
42, the engagement between the links and upper
hooks is constant, the removal of the wedges 4‘!
having the effect of transferring the engaging
30 and disengaging phases of operation from the
upper crossheads if) to the lower crossheads 53.
After the gate upper segment 6 has been
placed as desired on latches or in a repair or '
storage pit, but not on a gate lower segment as 5,
the hoist blocks 16 are to be lowered until the
apertures 50 in the hooks 42 are in alignment
with the openings in pierced ears 49, when the
wedges 47 are to be replaced, ?xedly positioning
the hook 42 and restoring to the upper crossheads
40 I9 the engaging and disengaging phases of op
eration. The lifting mechanism may then be
disengaged from the gate upper segment sub
stantially as heretofore described for disengaging
it from an assembled spillway gate.
To move a gate lower segment from which an
claims.
I claim:
1. In a structure of the class described the com
bination, with a crane and a load, of a load
engaging means suspended from the crane; a
housing disposed about the load engaging means
and displaceable relative thereto vertically within
?xed limits, said load engaging means being
adapted automatically to engage the load after
the housing has contacted the load and the load 25
engaging means has been lowered to load engag
ing position; ‘and means within the housing co
acting with said automatic means arranged to
automatically disengage the said automatic means
from the load by the act of lowering the said auto
matic means within the housing to a point below
the load engaging position.
2. Ina structure of the class described the com
bination, with a crane and a gate, of a plurality
of gate engaging means suspended from the crane;
a common housing disposed about all of the gate
engaging means and maintaining them in spaced
relation and displaceable relative thereto vertical
ly within ?xed limits, said gate engaging means
being adapted to engage the gate after the hous- .
ing has contacted the gate and the gate engaging
means has been lowered to gate engaging position;
and means within the housing coacting with said
automatic means arranged to automatically dis
upper segment has been removed, the guide beam
is lowered upon it and the lifting mechanism .ma-.
engage the said automatic means from the gate by 45
the act of lowering the said automatic means
within the housing to a point below the gate en
nipulated substantially as heretofore described
gaging position.
for an assembled spillway gate. The gate lower
50 segment is then placed as desired and the lifting
mechanism disengaged therefrom as heretofore
described for disengaging it from an assembled
spillway gate.
To pick up a gate upper segment, and connect it
55 to a gate lower segment, the lifting mechanism is
engaged with the gate upper segment by the
steps previously described for engaging it with
an assembled spillway gate. The hoist blocks are
maneuvered to remove the slack in the lifting
80 mechanism, after which the wedges are removed,
as heretofore described.
The hoist blocks are
then raised, the guide beam crossheads l9 and the
gate segment crossheads 53 contacting the upper
stops 24 and 54 respectively. This places the
3. In a structure of the class described the
combination, with a crane and a load, of a load 50
engaging means suspended from the crane; a
housing diposed about the load engaging means
and displaceable relative thereto vertically within
?xed limits, said load engaging means being
adapted automatically to engage the load after
the housing has contacted the load and the load
engagingmeans has been lowered to load engaging
position; means within the housing coacting with
said automatic means arranged to automatically
disengage the said automatic means from the load 60
by the act of lowering the said automatic means
within the housing to a point below the load en
crossheads 53 assume a position and arrangement
gaging position; and aligning means disposed
upon the housing and upon the load and adapted
to operatively align the load engaging means and
the load.
4, Ina structure of the class described the com
bination, with a crane and a gate, of a plurality
of gate engaging means suspended from the crane;
acommon housing disposed about all of the gate 70
engaging means and maintaining them in spaced
of parts similar to that shown in Figure 5. After
the load bearing members 30 have completed their
relation, and displaceable relative thereto ver
tically within ?xed limits, said gate engaging
65 crossheads 53 in a position and arrangement of
parts similar to that shown in Figure ‘l.
The gate upper segment is then lowered upon
the gate lower segment, the pilot pins 61 and
pilot sockets 68 effecting proper alignment. As
70 the lifting mechanism is then further lowered, the
excursion of camming surface 44 and have become
75 disposed within the reentrant surfaces 43, the lift
means being adapted to engage the gate after the
housing has contacted the gate and the gate 75
2,130,354
engaging means has been lowered to gate engag
ing position; means within the housing coacting
with said automatic means arranged to automati
cally disengage the said automatic means from
the gate by the act of lowering the said automatic
means within the housing to a point below the
gate engaging position; and aligning means dis
posed upon the housing and upon the gate and
adapted to operatively align the gate engaging
means and the gate.
5. In a structure of the class described the com
bination, with a crane and a gate, of a plurality of
gate engaging means suspended from the crane; a
common housing disposed about all of the gate en
15 gaging means and maintaining them in spaced
relation, and displaceable relative thereto ver
5
ing means, stop means disposed within the hous
ing and adapted to limit the excursion therewith
in of the hook engaging means, actuating means
adapted to effect engagement of the lifting hook
and the hook engaging means during the down
ward excursion of the latter within the ‘housing,
disengaging means adapted to effect disengage
ment of the lifting hook and the hook engaging
means when the latter approaches the lower limit
of its excursion Within the housing, locking means 10
adapted to continue the hook engaging means in
disengaged position during its upward excursion
within the housing, and releasing means adapted
to release the locked hook engaging means when
the latter approaches the upper limits of its ex
cursion within the housing.
tically within ?xed limits, said gate engaging
9. In combination with a lifting means and a
means being adapted to engage the gate after the
housing has contacted the gate and the gate en
20 gaging means has been lowered to gate engaging
position; means within the housing coacting with
said automatic means arranged to automatically
disengage the said automatic means from the
gate by the act of lowering the said automatic
25 means within the housing to a point below the
load, a plurality of lifting hooks af?xed t0 the load
in spaced relation, a plurality of hook engaging
gate engaging position; and interlocking means
interconnecting the gate engaging means.
6. In a structure of the class described the com
bination, with a crane and a gate, of a plurality
of gate engaging means suspended from the crane;
a common housing disposed about all of the gate
engaging means and maintaining them in spaced
relation, and displaceable relative thereto verti
cally within ?xed limits, said gate engaging means
being adapted to engage the gate after the hous
ing has contacted the gate and the gate engaging
means has been lowered to gate engaging posi
tion; means within the housing coacting with said
automatic means arranged to automatically disen
40 gage the said automatic means from the gate by
the act of lowering the said automatic means
within the housing to a point below the gate en
gaging position; aligning means disposed upon the
housing and upon the gate and adapted to opera
45
tively align the gate engaging means and the gate;
and interlocking means interconnecting the gate
engaging means.
'7. In combination with .a lifting means and a
load, a lifting hook af?xed to the load, hook en
gaging means suspended from the lifting means,
a housing disposed about the hook engaging
means and relatively displaceable thereto in the
line of its travel, stop means disposed Within the
housing and adapted to limit the excursion there
within of the hook engaging means, actuating
means adapted to e?ect engagement of the lifting
hook and the hook engaging means during the
downward excursion of the latter within the hous
ing, disengaging means adapted to effect disen
gagement of the lifting hook and the hook engag
ing means when the latter approaches the lower
limit of its excursion within the housing, locking
means adapted to continue the hook engaging
means suspended from the lifting means, a com
mon housing disposed about the hook engaging
means and relatively displaceable thereto verti
cally and adapted to maintain the hook engaging
means in registry with the lifting hooks, aligning
means disposed upon the housing and upon the
load and adapted to operatively align the housing
and the load, a plurality of stop means disposed
within the housing and adapted to- limit the ex
cursion therewithin of the hook engaging means,
actuating means adapted to effect engagement of
the lifting hooks with the hook engaging means
during the downward excursion of the latter
within the housing, disengaging means adapted to
effect disengagement of the lifting hooks and the
hook engaging means when the latter approach
the lower limit of their excursion within the hous
ing, locking means adapted to continue the hook
engaging means in disengaged position during
their upward excursion within the housing, re
leasing means adapted to release the locked hook
engaging means when the latter approach the
upper limit of their excursion within the housing,
and interlocking means interconnecting the hook
engaging means and adapted to synchronize the
cycle of operations of all of the hook engaging
29
as
30
1,35
40
45
means.
10. In a structure of the class described the
combination, with a crane and a gate, of a lifting
hook af?xed to the gate and provided with a reen
trant arcuate surface near its upper end and a 50
camming surface upon its upper face; link
suspending means depended from the crane and
adapted to motivation thereby; a housing dis
posed about the link suspending means and rela
tively displaceable thereto vertically; stop means 55
disposed within the housing and adapted to limit
the excursion of the link suspending means there
within; coacting aligning means disposed on the
gate and on the housing to operatively align the
gate and the housing; a link pivotally suspended 60
from the link suspending means; a load bearing
member a?ixed to the lower end of the link and,
adapted to eiTect primary angular displacement of
means in disengaged position during its upward the link by traversing the camming surface of the
excursion within the housing, and releasing ' lifting hook during the early portion of the down 65
ward excursion within the housing of the link sus
means adapted to release the locked hook engag
ing means when the latter approaches the upper pending means, and further adapted to opera
tively align itself with the reentrant arcuate sur
limit of its excursion within the housing.
face of the lifting hook upon the continued down
8. In combination with a lifting means and a
ward excursion of the link suspending means; a
70 load, a lifting hook a?ixed to- the load, hook en
gaging means suspended from the lifting means, link camming surface disposed uponthe link and
a housing disposed about the hook engaging adapted to effect secondary angular displacement
means and relatively displaceable thereto in the of the link by traversing the camming surface of
the lifting hook during the latter portion of the
line of its travel, aligning means adapted to oper
downward
excursion within the housing of the
atively
align
the
lifting
hook
and
the
hook
engag~
75
6
2,130,354
link suspending means; a link stop disposed upon
the link; a sear pivotally mounted upon the link
suspending means and adapted to coact with the
link stop to retain the link in the position assumed
upon the secondary angular displacement there
of; and a. trigger mounted upon the housing, and
adapted to coact with the sear, when the hnk sus~
pending means approaches the upper limit of its
excursion within the housing, to release the link
from its last named position.
11. In a structure of the class described the
combination, with a crane and a gate, of a pair of
two pairs of links pivotally suspended one pair
from each of the link suspending means; syn
chronizing means attached to both links of each
pair and adapted to provide uniform angular dis
placement thereof; load bearing members affixed
one to the lower end of each of the links and
adapted to effect primary angular displacement
spaced apart lifting hooks af?xed to the gate and
rovided each with a pair of oppositely disposed
of the links by traversing the camming surfaces
of the lifting hooks during the early portion of
the downward excursion within the housing of 10
the link suspending means, and further adapted
to operatively align themselves with the reentrant
surfaces of the lifting hooks upon the continued
downward excursion of the link suspending
15 reentrant arcuate surfaces near the upper end
means; link camming surfaces disposed one upon 15
and a pair of camming surfaces upon the upper
face; a pair of link suspending means depended
from the crane and adapted to motivation there
by; a housing disposed about the link suspending
20 means and relatively displaceable thereto verti
cally and adapted to position the link suspending
means in registry with the lifting hooks; stop
means disposed within the housing and adapted
to limit the excursion therewithin of the link sus
25 pending means; coacting aligning means disposed
on the gate and on the housing to operatively
align the gate and the housing; two pairs of links
pivotally suspended one pair from each of the link
suspending means; synchronizing means attached
30 to both links of each pair and adapted to provide
uniform angular displacement thereof; load bear
ing members affixed one to the lower end of each
of the links and adapted to effect primary angular
displacement of the links by traversing the cam
35 ming surfaces of the lifting hooks during the early
portion of the downward excursion within the
housing of the link suspending means, and fur
each of the links and adapted to effect secondary
angular displacement of the links by traversing
the camming surfaces of the lifting hooks during
the latter portion of the downward excursion
within the housing of the link suspending means; 20
link stops disposed one upon one link of each pair
of links; sears pivotally mounted one upon each
of the link suspending means and adapted to
coact each with the link stop complementary
thereto to retain the links in the position assumed 25
upon the secondary angular displacement there
of; triggers mounted one upon each end of the
housing, and adapted to coact each with the sear
complementary thereto, when the link suspending
means approach the upper limit of their excursion 30
within the housing, to release the links from their
last named position; and interlocking means in
terccnnecting the pairs of links.
13. A spillway gate comprising a gate lower
section; a lower lifting hook attached to the gate
lower section; a gate upper section adapted to be
superimposed upon and aligned with the gate
ther adapted to operatively align themselves with lower section; an upper lifting hook slidahly dis
the reentrant surfaces of the lifting hooks upon . posed within the gate upper section; a lower hook
engaging means depending from the upper lifting 40
the continued downward excursion of the link sus
pending means; link camming surfaces disposed hook and disposed within the gate upper section
one upon each of the links and adapted to effect and displaceable relative thereto vertically with~
secondary angular displacement of the links by
traversing the camming surfaces of the lifting
hooks during the latter portion of the downward
excursion within the housing of the link suspend
ing means; link stops disposed one upon one link
of each pair of links; sears pivotally mounted one
upon each of the link suspending 'means and
50 adapted to coact each with the link stop comple
mentary thereto to retain the links in the position
assumed upon the secondary angular displace
ment thereof; and triggers mounted one upon,
each end of the housing, and adapted to coast
55 each with the sear complementary thereto, when
the link suspending means approach the upper
limit of their excursion within the housing, to
release the links from their last named position.
12. In a structure of the class described the
60 combination, with a crane and a gate, of a pair
of spaced apart lifting hooks affixed to the gate
and provided each with a pair of oppositely dis
posed reentrant arcuate surfaces near the upper
end and a pair of camming surfaces upon the
65 upper face; a pair of link suspending means
depended from the crane and adapted to motiva
tion thereby; a housing disposed about the link
suspending means and relatively displaceable
thereto vertically and adapted to position the link
70 suspending meansv in registry with’ the lifting
hooks; stop means disposed within the housing
and adapted to limit the excursion therewithin
of the link suspending means; coacting aligning
means disposed on the gate and on the housing
75 to operatively align the gate and the housing;
in ?xed limits, said lower hook engaging means
being adapted automatically to engage the lower
lifting hook after the gate upper section has been 45
superimposed upon and aligned with the gate
lower section and the lower hook engaging means
has been lowered to hook engaging position;
means within the gate upper section coacting with
said automatic means arranged to automatically
disengage the said automatic means from the
lower hook by the act of lowering the said auto
matic means from the lower hook by the act of
lowering the said automatic means within the
spillway gate upper section to a point below the 55
lower hook engaging position; and locking means
within the gate upper section coacting with the
upper lifting hook and the lower hook engaging
means whereby the gate upper section and the
gate lower section may be maintained in assem 60
bled relation when the lower lifting hook is en
gaged by the lower hook engaging means.
14. A spillway gate comprising a gate lower sec
tion; a plurality of lower lifting hooks attached
to the gate lower section; a gate upper section 65
adapted to be superimposed upon and aligned
with the gate lower section; a plurality of upper
lifting hooks slidably disposed within the gate
upper
lifting
means
lifting
section and in alignment with the lower
hooks; a plurality of lower hook engaging 70
depending one from each of the upper
hooks and disposed within the gate upper
section and displaceable relative thereto vertically
within ?xed limits, said lower hook engaging
means being each adapted automatically to en 75
7
2,130,354
gage the lower lifting hook in registry therewith
after the gate upper section has been superim
posed upon and aligned with the gate lower sec
a point below the lower hook engaging position;
locking means within the gate upper section co
acting with the upper lifting hooks and the lower
tion and the lower hook engaging means has been
hook engaging means whereby the gate upper sec
tion and the gate lower section may be main
tained in assembled relation when the lower lift
lowered to hook engaging position; means within
the gate upper section coacting with said aut0~
matic means arranged to automatically disen
gage the said automatic means from the lower
hooks by the act of lowering the said automatic
[0 means within the spillway gate upper section to
ing hooks are engaged. by the lower hook engaging
means; and interlocking means interconnecting
the lower hook engaging means.
NEIL B. MADSEN.
10
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