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Патент USA US2411480

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NOV. 19, 1946.
Filed Deo. 22, 1945
4 Sheets-Sheet l
Nov. 19, 1946.
Filed Deo. 22, 1945
4 {Sheets-Sheet.- 2
Nov. 19, 1946.
A. E. s. TEMPLE.
Filed Dec. 22, 1945
2,411,480 '
4 sheets-sheet 's __
Filed Deo. 22, 1945 '
4 sheets-shea 4- -
ammira 22W@
Patented Nov. 19, 1946
Alan Edward Spence Temple, Godalming,
Application December 22, 1943, Serial No. 515,279
In Great Britain January 4, 1943
12 Claims.
(Cl. 14-36)
This invention comprises improvements in or
relating to movable bridges, dock gates and the
like. It is an object of the invention to pro
>ment thereby cbviating the need of any separate
vide means for moving a bridge, such for exam
ple as a bascule or like structure, which is heavy
and which has to be periodically operated, which
erence to the accompanying drawings which
show specific examples of bascule bridges con
structed in accordance with the invention. In
means are simpler and require a smaller power
the drawings:
braking device.
The invention will now be described with ref
driving unit than is the case with constructions
Figure l is a longitudinal section through a
at present in use.
bridge and operating parts therefor according to
1n operating a bascule bridge through the usual
one construction, the section of Figure 1 being
mechanism of a driving (motor and reduction
taken upon the lines I-I of Figures 2 and 3
gearing a high starting eii‘ort is required from
with certain parts broken away to show other
the motor on account of the weight of theV parts
parts behind them;
which have to be set in motion and the power oi
Figure 2. is a cross section approximately upon
the motor must be much greater than is neces 15 the line 2-‘2 of Figure l but with certain parts
sary to complete the movement once the motion '
broken away and with the right-hand part of th
has been initiated. The saine applies to other
heavy parts such as swing bridges, lock gates and
ligure shown in elevation;
Figure 3 isa plan, showing however the float
chamber and adjacent parts in horizontal sec
the like. Moreover, eflicient braking means have
to be provided to bring the parts to rest with 20 tion;
«r .
Figure Il is a vertical section through a regu
out shock at the end of the movement and with
lating valve looking in the direction of thearrows
By the present invention the interposition of
gearing for applying power to the moving parts
¿1_-4 ofFigure 5; `
tity of liquid which requires to be transferred
I9 is of such‘weight that if the iioat chamber
2l, n is emptyk it will be'able to raise the girder
Figure 5 is a plan of the valve shown in Figure
and of separate braking means for stopping them 25 4 with parts broken away to- show the internal
construction ;
may be entirely obviated.
Figures 6, 7 and 8 are diagrams of pipe connec
According to the present invention in movable
bridges, dock gates and the like there are pro
Figure 9 is a diagrammatic side elevation, and
vided operating means comprising a ñoat oper
Figure i0 is a cross section of an alternative.V
atively connected to the moving parts, a neat
construction of bridge.
chamber in which the Íioat moves and means to
Referring nrst to Figures 1 to 8, the bridge
fill and empty the chamber so as to set the mov
comprises a girder II which may span, say, a
ing partsfin motion by the increase in eiiective
canal l2 and which in itself may be of the usual
weight of the 'float when the chamber is being
construction for a bascule bridge. The girder Il
emptied and by the decrease in effective Weight
has an abutment Iëi at one endand is mounted
when the chamber is being filled.
on a pivot shaft I4 at the other end, the pivot
The invention »further includes a bascule bridge
shaft being arranged to come within an upper
comprising in combination a tiltably-mounted
corner of a chambered structure l5 constructed
bridge girder, a counterweight therefor and
o‘f‘conorete and located at the opposite side ‘of
means to vary the effective Weight of the counter
the canal `I2 from the abutment I3. The struc
weight by adding or withdrawing liquid in con
ture-I5 has, over the greater part of its Width,
tact therewith. In certain cases the weight of
a roof section i5 which is `of the same height
the counterweight may be varied by adding and
as >the door of the girder Il'and constitutes a
withdrawing liquid` to and from chambers in 45 roadway
on to the bridge when the` girder Il is ~
the counterweight itself, but generally the coun-<
horizontal. 40n the pivot shaft I4 there are
terweight is located in a float chamber and the
mounted three counterweights Il, I8, I9. The
means for introduction and withdrawal of liq- Y
counterweights Il, I8 are located in chambers
uid/are constituted by means for varying ther
2Q beneath theroadway I6 and balance the great-V
liquid level in the float-chamber.
50 er part of the weight of the girder I I. The coun- A
Preferably the float nts the float chamber in
terweight I9 is located in a iloat chamber 2|V to
which it works closely so as to limit theI quan
one side of- the- roadway and the counterweight
for operation and so as to damp the movements
of the parts and to cushion the end of the move-` ,55 I I> into the position shown in chain lines in Figure
l, whereas if the float chamber 2| is ñlled with
with a pinion 68 on a vertical operating shaft
liquid up to the level of the mark shown at 22, in
69. Thus when the shaft 12 is operated to move
Figures l and 2, the girder Il will just touch
the plate 51 on the inlet 35 toward the left the
corresponding plate on the outlet 43 will be
the abutment i3. If the float chamber 2| is
filled a little further to the level oi the mark 5 moved toward the right. Similarly when the
23 the girder Ii'will be held firmly down on the
shaft 89 is rotated to move the plate 58 to the
abutment I3. The counterweights I1, I3, and I9
left on the `inlet 35 the plate 58 on the outlet
are of sector-like shape as seen, for the counter
43 will be moved in the opposite direction. Thus
weight i9, in Figure l, and the general shape of '
opening of the inlet 'will be accompanied by clos
the ñoat chamber 2| in which the counterweight 10 ing of the outlet and vice versa.
I9 works is that of a quadrant having a curved
A bevel wheel 13 on the pivot shaft I4 oper
wall 24 nearly concentric with the shaft I4, a
ates a bevel wheel 14 on the upper end of the
vertical Wall 25 shutting off the float chamber
shaft 12. The shaft 89 is actuated, as best
seen in Figure 2, by bevel gearing ‘l5 from a
from the canal I2 and a top 28 which forms the
underside of a reservoir 21 for liquid. Adjacent 15 horizontal shaft 18 which extends into the float
chamber 2| and carries a pinion 11 operated by
to the reservoir 21 there is a pump house 28,
the reservoir 21 and pump houseV 23 being 1o
a spur gear 18 on a sleeve 19 which loosely sur
cated to one side of the roadway.
rounds the shaft I4. The sleeve 19 has an arm
In the space below the quadrantal wall 24 of
which carries a supplementary float 89 Working
the iioat chamber and of the adjacent chambers 20 in the float chamber 2 I.
28, which are of similar shape, there is formed a
With a view to damping the movements of
triangular reservoir or sump 29 which extends
the girder Il the float I9 is made to fit between
for the whole of the width of the structure I5,
the walls of the float chamber 2| closely. More
as best seen in Figure 2. In the pump chamber
over buffers 98, 9| are provided, the former on
28 is a centrifugal pump 39 driven by an electric 25'i the underside of the horizontal Wall 26 and the
motor 3|. The suction pipe 32 of the pump
latter on the inner side of the vertical wall 25.
38 is not shown in Figure 1,'but extends as in
These buffers are of such size as nearly to fit
dicated in Figures 6 to 8 from the sump 29 to
into recesses 92, 93 which are formed in the coun
the pump through a valve 33, the valve 33 being
located in the pump house 28 so as to be read
y„,gterweight I9 and which are connected together
3o# by a conduit 94 passing through the counter
ily accessible to the operator. The pump de
livers through a pipe 34 to the reservoir 21.
From the bottom of the reservoir 21 there eX
tends another pipe 35 to a regulating valve 35
weight. When the counterweight approaches the
vertical wall 25 in the course of the lifting of the
girder II, the recess 93 ñts somewhat closely
of the quadrantal chambers 28 but to one side
‘to damp the movement and to bring it to rest,
liquid being forced out of the space between the
buffer and the bottom of the recess through the
,f „1, over the buiîer 9| and the liquid trapped between
which is located in a space at the bottom of one 35î the buffer and the bottom of the recess 93 serves
of the path of the counterweight I1, close to the
wall `of the float chamber I9. The valve 35 is
operated by a handwheel 31 in the pump house _ \ conduit 94 and also around the sides of the buffer.
28 through a vertical shaft 33, gearing 39 and 40:11u a similar way when the girder has almost
a second vertical shaft 48.
reached the position where it abuts upon the `
The pipe 35 beyond the valveA 35 opens into
one side of an automatic regulating valve 4|.
Beyond the automatic regulating valve 4I there
is another hand-operated valve 42 which delivers
by pip-e 43 >into the sump 29. The valve 42 is
operated by gearing 44, 45, a vertical shaft 48,
abutment I3 the movement is damped by the
buffer 98 entering the recess 92.
In the operation of the bridge, when it is de
’ sired to lower the bridge the valve 42 is closed
and the valves 35 and 5| are opened as shown
Vin Figure 6 so that liquid flows by gravity from
gearing 41 and another vertical shaft 48 from aV
the reservoir 21’to the float chamber 2| and
hand-wheel 49 in the pump house 28. From the mfills- it. The effective weight of the counterweight
:automatic valve 4| there is a branch 50 extend 5Ü‘l‘is reduced by immersion. It may be stated that
ing through a regulating valve 5| into the float
the lowest position of the liquid level in the float .
chamber 2|.Y
chamber 2| is about that indicated by the mark Y.
82 in Figure 1 and in this position of the liquid
The automatic valve 4I, which is shown in
detail in Figures 4 and 5, will now be described.V u w the counterweight I9 will be held firmly in the
The valve 4| is constituted by a rectangular box öörposition indicated by the chain lines in the ñg
shaped casing closed at each side by vertical
ure. As soon as'the liquid level has risen to
side plates 53, 54, the inner faces 55 of which
about the mark 83 by reason of the flow of liq
uid. from'the reservoir Y21 the pressure of the
constitute valve faces. -Over> these valve faces
there slide regulating valve-plates 51, 58 and the
counterweight on 'thelbuffer 9| will be relieved
adjacent edges 59, 58 of these plates determine 653 and further iiow of liquid into the floatcham- by their distance apart the amount of the valve
ber-will lower the girder gradually until when
opening. f The plates 51, 53 slide over a port
the level indicated by the mark 22 is reached
the girder will rest upon the abutment I3. The
5I which, as‘shown in Figure 4, is of a more or
position of the valves during this operation is
less» >’triangular formation with its apex on the
lef-t as viewed in the figure. _
6öiindicated in Figure 6, and if thereis any liquid
A branch connection 82 from the inlet con
remaining in the sump 29 during this operation
duit' 35 leads to two supplementary ports 53, 64
the pump 38 can be kept running. It will there
which areY shown in dotted lines in Figure 4 and
fore be appreciated that it is not necessary for
co-operate with ports 85, 68 in the plate 58. A „the reservoir 21 to be completely'ñlled before '
similar pair of plates 51, 58 operate on the out 70"-llowering of the 'bridge takes place.
let face formed by the inner face of the plate 54
As the girder Il approaches the abutment I3 ‘
of the valve 4I. The plates 51 carry racks 18
it is desirable that the rate of :dow of liquid into j
which engage with opposite sides of a pinion 1|
the float chamber should be reduced.' 4The rise '
mounted on a _vertical operating shaft 12. Simi
ì >`„of the supplementary iloat 88 operates shaft 99
larly'the plates 58 carry racks 61 which mesh 'ltrand` tends to move the plate 58 to the left as
2,41 13.4.80
viewed in Figure 4. As the girder || descends it
moves the valve plate 5l also to the left through
the gearing connected with the shaft l2; Thus
the plate 5l follows the plate 58 across the open
ing the pressure of the wind. Qn the other hand
ing or port El, if the girder lags in its move
ment the rate of flow of liquid is automatically
increased, but otherwise the plates keep about
the same distance apart, and, the port 6| be
ing of a triangular shape, as shown in the
4, with its apex toward the left,
the area open to the :dow of liquid is gradually
reduced as the girder l i approaches the abutment
I3 so that the movement
be slowed down.
The parts are so proportioned that when the
girder reaches the abutment
the port 6i will
be wholly closed by plate 5i.
Thereafter ad
mission `ci? liquid` to the `float chamber can only
take place by the ports Sd, @6 and 63, 55 which at
if the wind blows on the girder in such a direc
tion as to tend to lift it the counterweight will
be depressed and the liquid level in the float cham
ber will be raised. Owing to the narrow space be
tween .the sides of the counterweight and the sides
of the ñoat chamber, the variations of liquid level
produced in the float chamber by these actions of
wind will be quite high for a small movement of
the girder and therefore the compensating effect
-is considerable and the girder will tend to move
but little under the iniluence of wind; taken in
conjunction with the damping action on the
movement which the liquid exerts this makes for
~ a stable action of the bridge. As already pointed
out, when the bridge is lowered the liquid level
is made high enough to hold the girder down
firmly on its outer abutment; in the same way
when the bridge is raised the liquid level is made
20 low enough for the float to be held firmly against
ficient flow of water to continue until the level
the abutment in the float chamber; thus there is
indicated by the mark 23 has been reached, when
no tendency for the bridge to swing out of raised
the girder l! will be resting iîrinly on the abut
position under wind forces.
ment | 3. When the bridge is in the lowered posi
Referring now to Figures 9 and 10, these show
tion the valve 35 is closed and the valves thus
the construction of a rolling bascule bridge in ac
assume the position shown in Figure 7.
cordance with the invention. The bridge com
When the bridge is to be raised a similar series
prises a triangulated girder |00 which spans an
of operations take place but in the reverse direc
opening lill and rests at its free end upon an
tion. The valve _t2 is open,
indicated in Fig
abutment |û2. At the other end the sides |63 of
ure 8, and liquid ilows out of the iioat chamber 30 the girder are connected to a heavy transverse
'2| into the sump 23. As the girder moves up
shaft |94 which is located at the centre of the
ward it moves the plates 5l, 58 across the open
rolling surfaces |65 of the bascule. The rolling
ing of the valve ¿lí which lies on the opposite side
surfaces are formed upon two large counter
from the port Si, shown in Figure 4, and regu
weights |06, |01 which are carried on plates |03,
lates the flow into the conduit 5.13 in a similar way
|09 rigidly secured to the ends of the shaft |04.
to that already described for the regulation ci the
The counterweights |96, |01 are `spaced by the
flow within the conduit
The girder is there
shaft |04 from the sides of the girder |93 and the
fore moved steadily upwards and broughtJ gently
counterweights rest on the bottomvof float cham
to rest in its uppermost position.
bers HD, |||. The float chambers are shaped to
The pump 3G can be set running
soon as 40 be a fairly close ñt against the sides of the coun
there is any liquid in sump 29, that is to say,
terweights and to afford no more than enough'
as soon as the bridge commences to rise, and the
room for the weights to roll back into the position
reservoir 2ï can, if desired, be made to hold
in which the girder lilß is fully lifted. The bot
enough liquid to lower the bridge twice, so that
toms of the float chambers H0, ||| are provided
in practice even if conditions cali for as much as 45 with heavy rolling plates or sole plates on which
three successive lowerings in a sho-rt period, a
the surfaces m5 can roll with ease and prefer
pump which can raise only enough liquid to oper
ably oil is used as the floating medium in the iioat
ate the bridge once in this time will suffice.
chambers H0, `||I. Appropriate sump, reservoir
It will be noted that the valve 5i which con
and pumping apparatus is provided, which is not
nects the automatic valve di with the float cham 50 shown in thedrawings, so that the float chambers
ber 2! is permanently open except when it is
l I0 and l || can be filled or emptied at will.
necessary to effect some attention to the parts in
When the float chambers are filled `to the level in
the chamber 2i?, which can be done by a work
dicated by the chain line ||3 the girder l5!! will
man descending into the chamber. The valve
reach abutment |92 and on being further ñlled to
5|, therefore, unlike the valves 3b and 42, is not 55 _the level indicated by the chain line | I 4 the girder
provided with a control operable from the pump
will be pressed ñrmly down upon the abutment.
house 28.
The weight ||5 is an additional counterweight
It is to be observed that although the counter
mounted directly upon a rearward extension of
weight has been referred to as a float it need
the girder |00. -The oil in the ñoat chambers
not, in itself, be lighter than the liquid and in 60 tends to keep the rolling surfaces clean and to
reduce operating friction.
deed would not normally be so as the counter
weight is in the main balanced by the weight of
the case of a swing bridge or dock gates the
the girder and the liquid only has to exert a suf
counterweight can be connectedto the bridge
ficient buoyancy to overcome the excess weight
girder or to the gates by an appropriate link
of the counterweight and to hold the bridge, when 65 work. Again it is possible with a swing bridge to
ineke the girder pivot spherical so that the girder
it is down, firmly down on its abutment.
It is further to be observed that when the
is free not only to swing laterally but also to rise
bridge is being lifted or lowered there is an auto
and fall. A counterweight can be provided to the
matic action with the construction described
girder that rides in a quadrantal tank or ñoat
which tends to compensate for the effects of wind 70 chamber concentric with the spherical pivot and
a cam may be provided which extends around
forces, which, as is well known, may be consid
erable. Should the wind blow on the girder in
the quadrantal wall of the float chamber and
Vsuch a direction as to tend to depress it, the coun
engages a roller on the counterweight. The effect
terweight is lifted further out of the liquid, in
is that if the tank is emptied the counterweight
creasing the effect of the weight and thus resist 75 presses on the cam and the >cam deñects the
this stage are brought into register with one an
other by movement of. plate 58 and allow a suf
bridge around the quadrant, allowing the coun-`v
terweight to fall while the bridge is swinging; the
chamber, movable valve means in the regulating
valve operatively connected to the counterweight
bridge therefore falls Vat thecounterweight endv
to be actuated thereby, other movable valve means
in the regulating valve operatively connected to a
supplementary iioat in the float chamber to be
actuated thereby, the operative connections to
both said movable valve means being such that
during supply of liquid to the float chamber the
and rises at its opposite end while swinging
round the pivot and executes a movementwhich
is a combination' of a lifting and a swinging
I claim:
movable valve means move together across a
l. A bascule bridge comprising in combination
a tiltably-mounted bridge girder, a counterweight 10 shaped inlet port to reduce the rate of ñow as
the bridge descends and during raising of the
rigidly connected Vthereto and means tofvary at
will the effective weight of the counterweight by
bridge other parts of both said movable valve
means move together across a shaped outlet port
adding or withdrawing liquidin contact there-`
with under the control ofthe operator. '
to reduce the flow towards the end of the rise of
the girder.
2. A bascule bridge as -claimed in claim 1,
wherein the counterweight is located in a iloat
9. A bascule bridge as claimed in claim 3,
wherein a reservoir is provided above the level
chamber so as to constitute a float therein and
the means for introduction and withdrawal oí
of the float chamber and the filling of the float
liquid are constituted by means for varying the
chamber is eiîected through a communication`
iiquid level in the float chamber.
20 conduit extending from the reservoir to the ñoat
chamber and controlled by a regulating valve i
3. A bascule bridge comprising in combination
a bridge girder which is mounted on a pivot, a
counterweight rigidly secured to the bridge girder
10. A bascule bridge as claimed in claim 3,
and projecting beyond the pivot, a float chamber
wherein the float chamber is connected by a con
in which the counterweight moves and means to 25 duit to a sump, the conduit containing a regu',
lating valve, and the sump is located beneath the
vary the liquid level inlthe float chamber to raise
and lower the girder.
level of the ñoat chamber so that the chamber
can be emptied by gravity.
4. A bascule bridge as claimed in claim 3,
il. A bascule bridge as claimed in claim 3,
wherein the counterweight and ñoat chamber are
wherein the means for varying the liquid level in
located beneath the ñoor level of the bridge.
5. A bascule bridge as claimed in claim 3,
wherein an additional counterweight is provided,
not located in the float chamber, the counter
weights being secured upon the pivot shaft of the l
bridge girder.
6. A bridge as claimed in claim 3, wherein the
ñow of liquid out of the float chamber forv the
purpose of'raising' the bridge is effected by grav
, ity and the rate of flow is regulated automatically
so as to be reduced as the bridge rises by means
of a valve operated by the moving parts of the
'7. A bridge as claimed in claim 3, wherein the
ilow of liquid out of the'iioat chamber for .the
purpose of raising the bridge is eiîected by gravity
and the rate of flow is inñuenced as the bridge
rises by means of a valve operated by a'supple
mentary float in the ñoat chamber.
8. A bascule bridge as claimed in claim 3,
wherein the meansßto vary the liquid> level in
cludes a regulating valve to control admission of
liquid to land withdrawal thereof from the float
the float chamber comprise a reservoir above the
level of the ñoat chamber, a sump below the level
of the float chamber, conduit means connecting
the reservoir, the sump and the ñoat chamber
together, regulating valve means in said conduit,
means for permitting liquid to flow >from the
reservoir into the float chamber when desired
and from the float chamber into the sump when
desired and a pump for raising liquid from the
sump to the reservoir.
12. A bridge comprising in combination a roll-' .
ing bascule girder, a :float-chamber located on`
each side of said girder at one of the abutments
thereof, two counterweights, one on each side of
» the girder, secured to the girder and each dip
ping into one of the float-chambers, the two
counterweights being shaped to provide rolling
surfaces which roll on the abutments of the float~ '
chambers and means to introduce or withdraw
liquid to or from the float-chamber at will for
raising and lowering the girder.
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