US827496A - Starting device for motors. - Google Patents
Starting device for motors. Download PDFInfo
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- US827496A US827496A US25417205A US1905254172A US827496A US 827496 A US827496 A US 827496A US 25417205 A US25417205 A US 25417205A US 1905254172 A US1905254172 A US 1905254172A US 827496 A US827496 A US 827496A
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- hanger
- motor
- shaft
- gear
- piston
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N7/00—Starting apparatus having fluid-driven auxiliary engines or apparatus
- F02N7/08—Starting apparatus having fluid-driven auxiliary engines or apparatus the engines being of rotary type
Definitions
- Patented ma 31, 1906.
- This invention relates to mechanical devices for starting explosive-motors.
- the invention has among its objects to provide a starting device which is particularly applicable to motor-cars and which is enerzed by the motor itself after the latter has een started.
- the invention also contemplates the use of fluid-pressure as a motive power, thereby doing away with the use of springs -or similar devices which are subject to rapid deteriora tion.
- a further object of the invention is to provide a starting device so mountedwith respect to the engine-shaft that the device may be operated so asto start the motor, tobe energized by tha'same, or to be moved out of cooperative relation with said shaft by means, of a single lever, which in case of a motor-car can'be operated from the drivers seat.
- Figure 1 is a front elevation of the improved starting device, showing the. same mounted upon a motor-vehicle.
- Fig. 2 is an enlarged side elevation of the device, certain parts of the motor-vehicle being removed for the sake of clearness and
- Fig. 3 is a front elevation of the starting device, the front plate being removed and-certain parts shown in section.
- A denotes the engine-hood of a motor-vehicle, and m the engine-shaft, which is disposed beneath the hood in the usual manner and has keyed'to its forward end a gear-wheel 1.
- brackets F Extending forwardly from the lower edges of the front plate O are spaced brackets F, having sleeves at their forward ends, which embrace a rod G, extending between the forward ends of the vehicle-springs, as shown.
- a plate D similar to the plates B C, is mounted in upright position across the brackets F, and between l the platesC and D are su ported the operative parts of the improve starting mechanism.
- This mechanism embodies a cylinder 1 d, extendin across the front of the hood in horizontal irection and supported at either side between the plates by means of bosses and screwnuts or in any other suitable manner.
- a pipe bflcontrolled by an oscillating cock or valve 1 Leading from the head of the cylinder (1 which is farthest from the engine-shaft m is a pipe bflcontrolled by an oscillating cock or valve 1), operated by a crank-arm a and other mechanism to be presently-described.
- the ipe b is in turn connected to a pipe 0, which is referably made of flexible material, and t e latter pipe in turn connected to one head of a cylinder b, which is shown in Fig. 3 and in practice may be mounted upon any suitable part of the motor-car.
- a pipe (1 leads from the cylinder 1) at the end opposite the connection of the latter with the pipe 0, and said pipe (1 is in turn connected with a suitable receiver or reservoir a, as illustrated in Fig. 3.
- This receiver in practice is also mounted on or stored within any suitable part of the motor-car.
- a valve r of any suitable type is provi ed.
- the receiver a is filled with a highly elastic gas designed to .act upon a piston c, which is freely movable throughout the length of the cylinder-b.
- This piston acts in turn upon a body of liquid which is contained in the cylinder band which may be forced by said piston into the pipe 0 by the valve b- :when. the same is opened and thence into the cylinder (1, where it acts upon a piston e.
- a gear-actuating member illustrated as a rack f, which is of considerable length and is movable-through an opening in the cylinder-head nearest the engine-shaft.
- the teeth of the rack f are arranged at the lower edge of the same and are ting mechanism to be described hereinafter. Between the rack f and the piston e a cushioning or lost-motion device m is arranged for reducing the shocks upon the transmitting mechanism.
- said hanger is enlarged to form a segment W, provided with a segmental slot by which the hanger is guided over a pin 0, extending from a roller 0 disposed at the rear of the carrier and movable in contact with the upper edge of the rack f, so that said rack is efficiently guided and maintained against upward stress irrespective of the pivotal position of the hanger.
- J ournaled upon the pivot-pin 0 at the rear of the hanger r s t is a gear-wheel g, meshing with the rackf.
- a larger geanwheel h is also j'ournaled upon the stud or pin 0 at the rear of the hanger, and said ear-wheel h meshes with a small gear-wheelIc, rotatable about a pin p, carried at the extreme end of one of the divergent hanger legs or branches.
- a large gear-wheelt' is also rotatable about the pin p w eels bearing a fixed relation to each other.
- a pin q similar to the pin p, extends rearwardly .from the end of the other hanger-leg and has rotatable about the same a small gear-wheel 7', meshing with the large gear-wheel 'i.
- the train of gears described is so arranged upon the hanger that when the latter is oscillated on its pivot. either of the Wheels i 1' may be brought into mesh with the gear L upon the motor-shaft,-depending upon the direction in which said hanger is moved.
- one of the lower legs thereof hasconnected thereto a connecting-rod it, which is pivoted at n to a system of levers X Z, fixed to a spindle V, extendin between the supporting-plates.
- the lever J is connected in any suitable way to a lever, (not shown,)
- the operation of the improved starting device is essentially as follows: Supposing the parts to be in the position shown in Fig. 3 and it is desired to energize the device from the motor, which will be considered as being in operation, the lever Z is so actuated by the termediary of the connecting-rod u, the rocking of the crank-arm a in the direction indi-' cated by the arrow 4 and the consequent opening of the valve b, which thus permits t e liquid in the cylinder (1 to escape into the pipe 0 under the pressure of the piston e.
- the liquid driven out of the cylinder (1 by said piston then enters the c linder b and under the pressure generate by the motor forces the piston ctoward the left, as indicated in Fig.
- the lever Z is then actuated, so that the hanger is shifted into its median positionviz., so that its gears are out of engagement pressed condition in the receiver a, a small amount being diffused in the pipe (1, as will be understood.
- the lever Z is thrown in a direction opposite to that first named, so that the gearcarrying hanger will be shifted to the left, as shown, and the small gear 1' will engage the motor-shaft gear Z, which in this case is the driven member.
- a starting device including a shiftable hanger provided with separate legs, agear journaled on each of said legs said gears being of diiierent diameters and intermeshing, and a device adapted to drive or to be energized by 3.
- the pivoted hanger in the form of an inverted .Y, the train of cars mounted on said hanger and embo ying ears journaled at the lower ends of the iranches or legs of said hanger and disposed at opposite sides of said motor-shaft gear, the means for pivotally rocking said hanger, and the mechanism adapted to drive or to be energized by the motor-shaft through one of said gears.
- a starting device embodying a gas-receiver, a liquid-containing cylinder connected therewith, a piston in said cylinder dividing the gas from t e liquid, a second cylinder connected with the first, a liquid-actuated pis-.
- starting device including a fluid-actuated device, a valve for controlllng the same, a transmitting mechanism shiftable' into and out of coo erative relation with said motor-shaft, an means for automatically opening said valve when said transmitting mechanism is shifted into such cooperative relation.
- a starting device in combination, with the motor-shaft, a starting device includedin a fluid-actuated device a valve for contro ling the same, a transmitting mechanism shiftable into and out of operative connection with said motorshaft, and means for automatically closing said valve when said transmitting mechanism is shifted out of operative position with respect to said shaft.
- mechanism for transmitting motion from said means to said motor-shaft or vice versa said mechanism being shiftable out of cooperative relation with the motorshaft, and means for automatically opening ducting a non-elastic medium into said cylinstarting device embodying fluid-actuated mo-. tor-energized means, a valve for controlling said valve when said transmitting ine'chander, a valve for controlling thev admission of such medium, transmitting mechanism in operative connection-with said piston and shiftable into and out of cooperative relation'to the motor-shaft, and means for automatically opening said valve when said transmitting mechanism is shifted into such relation and closing said valve when said transmitting mechanism is shifted into inoperative position 13.
- a fluidpressure cylinder 3, piston therein, means for conducting a non-elastic fluid into said cylinder, an oscillating valve for controlling the admission of suc medium, a transmitting mechanism embodying "the pivoted hanger having a train of gears mounted thereon, and a rod connecting said hanger and said valve.
- valve b the crank-arm 0 applied to said valve, and the rod u connectin said arm with the upper portion or shanko -the'hanger 1 ried at the ends of the branches or legs will mesh with said motor-shaft gear, a powercylinder, a piston in said c li-nder, a rack attached to said piston and 1n permanent engagement with the gear journaled on the seam pivot of said hanger, a pipe for conducting a non'elastic medium to said cylinder, an oscillating valve in said pipe, a crank-arm attached to said valve, and a rod connecting said crank-arm with the upper portion or shank of said hanger.
- a pivoted hanger In combination, with the motor-shaft gear, a pivoted hanger, a train of gears mounted thereon, power-operated means in operative eng ement with one of said train of gears, an a lever mechanism for rocking said hanger in either direction and thereby engagin either of two of the gears thereon Withsai motor-shaft gear.
- a starting device for explosive motors the combinatlon of a fluid-pressure cylinder, a pistonmovable therein, a rack attached to said piston, a cushioning device interposed between said rack and piston, and a transmitting or coupling mechanism operable by said rack.
- a starting device for motors the combination, with a device operated by elastic-fluid pressure, of a transmitting or coupling mechanism embodying a train of gears, a piston operated by said elastic-fluid device through the medium of a liquid, a rack' operated by said piston and engaging one of said gears, and a cushioning device interposed between said rack and said piston.
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Description
PATENTED JULY 31 B. BATISSE. STARTING DEVICE FOR MOTORS.
APPLIOATION FILED APR. 6. 1905.
Z-SHEBTS-SHEBT 1.
- two rectangular plates B C.
UNIT D STATES PATENT OFFICE,
Specification of Letters Patent.
Patented ma 31, 1906.
Replication filed April 8, 1905. Serial No. 254172.
To all whom it may concern.-
Be it known that I, EMILE BA'rIssE,a citizen of the Re ublic of France, residing in Lyon, France, ave invented certain new and useful Im rovements in Starting Devices for Motors, 0 which the following is a specification. a
This invention relates to mechanical devices for starting explosive-motors.
The invention has among its objects to provide a starting device which is particularly applicable to motor-cars and which is enerzed by the motor itself after the latter has een started.
The invention also contemplates the use of fluid-pressure as a motive power, thereby doing away with the use of springs -or similar devices which are subject to rapid deteriora tion.
A further object of the invention is to providea starting device so mountedwith respect to the engine-shaft that the device may be operated so asto start the motor, tobe energized by tha'same, or to be moved out of cooperative relation with said shaft by means, of a single lever, which in case of a motor-car can'be operated from the drivers seat.
With these and other ends in view the invention consists in the novel features and combinations of parts to be hereinafter disscribed and claimed. 1
In the accompanying drawings, in
the same parts'are denoted by the same reference characters throughout the several views, Figure 1 is a front elevation of the improved starting device, showing the. same mounted upon a motor-vehicle. Fig. 2 is an enlarged side elevation of the device, certain parts of the motor-vehicle being removed for the sake of clearness and Fig. 3 is a front elevation of the starting device, the front plate being removed and-certain parts shown in section.
Referring to the drawings, A denotes the engine-hood of a motor-vehicle, and m the engine-shaft, which is disposed beneath the hood in the usual manner and has keyed'to its forward end a gear-wheel 1. To the front or face of the hood A and above and slightly to one side of the engine-shaft m are secured Extending forwardly from the lower edges of the front plate O are spaced brackets F, having sleeves at their forward ends, which embrace a rod G, extending between the forward ends of the vehicle-springs, as shown. A plate D, similar to the plates B C, is mounted in upright position across the brackets F, and between l the platesC and D are su ported the operative parts of the improve starting mechanism. This mechanism embodies a cylinder 1 d, extendin across the front of the hood in horizontal irection and supported at either side between the plates by means of bosses and screwnuts or in any other suitable manner. Leading from the head of the cylinder (1 which is farthest from the engine-shaft m is a pipe bflcontrolled by an oscillating cock or valve 1), operated by a crank-arm a and other mechanism to be presently-described. The ipe b is in turn connected to a pipe 0, which is referably made of flexible material, and t e latter pipe in turn connected to one head of a cylinder b, which is shown in Fig. 3 and in practice may be mounted upon any suitable part of the motor-car. A pipe (1 leads from the cylinder 1) at the end opposite the connection of the latter with the pipe 0, and said pipe (1 is in turn connected witha suitable receiver or reservoir a, as illustrated in Fig. 3. This receiver in practice is also mounted on or stored within any suitable part of the motor-car. For controlling the communication between the receiver a and the pi e d a valve r of any suitable type is provi ed.
In carrying out the invention the receiver a is filled with a highly elastic gas designed to .act upon a piston c, which is freely movable throughout the length of the cylinder-b. This piston acts in turn upon a body of liquid which is contained in the cylinder band which may be forced by said piston into the pipe 0 by the valve b- :when. the same is opened and thence into the cylinder (1, where it acts upon a piston e. Secured to the side of the last-named piston, which is not in con tact with the liquid, is a gear-actuating member, illustrated as a rack f, which is of considerable length and is movable-through an opening in the cylinder-head nearest the engine-shaft. The teeth of the rack f are arranged at the lower edge of the same and are ting mechanism to be described hereinafter. Between the rack f and the piston e a cushioning or lost-motion device m is arranged for reducing the shocks upon the transmitting mechanism.
Above the engine-shaft and pivoted between the plates C and D at a point slightly below the axis of the cylinder d is a hanger or designed to act upon a coupling or transmit-v at the'rear of the gear-wheel 70, said pivot-pin 0, upon which said hanger is pivoted, passing through the same at the intersection of the legs or branches thereof. -At a point above the pivot 0 said hanger is enlarged to form a segment W, provided with a segmental slot by which the hanger is guided over a pin 0, extending from a roller 0 disposed at the rear of the carrier and movable in contact with the upper edge of the rack f, so that said rack is efficiently guided and maintained against upward stress irrespective of the pivotal position of the hanger.
J ournaled upon the pivot-pin 0 at the rear of the hanger r s t is a gear-wheel g, meshing with the rackf. A larger geanwheel h is also j'ournaled upon the stud or pin 0 at the rear of the hanger, and said ear-wheel h meshes with a small gear-wheelIc, rotatable about a pin p, carried at the extreme end of one of the divergent hanger legs or branches. A large gear-wheelt' is also rotatable about the pin p w eels bearing a fixed relation to each other. A pin q, similar to the pin p, extends rearwardly .from the end of the other hanger-leg and has rotatable about the same a small gear-wheel 7', meshing with the large gear-wheel 'i. The train of gears described is so arranged upon the hanger that when the latter is oscillated on its pivot. either of the Wheels i 1' may be brought into mesh with the gear L upon the motor-shaft,-depending upon the direction in which said hanger is moved.
In order to effect the oscillation of the hanger 1" s t, one of the lower legs thereof hasconnected thereto a connecting-rod it, which is pivoted at n to a system of levers X Z, fixed to a spindle V, extendin between the supporting-plates. The lever J is connected in any suitable way to a lever, (not shown,)
' It is therefore obvious that when the hanger is shifted in either direction the crank-arm a will be shifted, as indicated by the arrows 3 and 4,and consequently the valve b will be opened; In the position shown-that is to say, when the train of gears carried by the hanger is out of cooperative relation with the gear on the motor-shaft-said valve is closed,
. its crankarm being disposed vertically.
The operation of the improved starting device is essentially as follows: Supposing the parts to be in the position shown in Fig. 3 and it is desired to energize the device from the motor, which will be considered as being in operation, the lever Z is so actuated by the termediary of the connecting-rod u, the rocking of the crank-arm a in the direction indi-' cated by the arrow 4 and the consequent opening of the valve b, which thus permits t e liquid in the cylinder (1 to escape into the pipe 0 under the pressure of the piston e. The liquid driven out of the cylinder (1 by said piston then enters the c linder b and under the pressure generate by the motor forces the piston ctoward the left, as indicated in Fig. 3, so that the highly-compressi ble gas filling said last-named cylinder at the side opposite the liquid is driven into the pipe d and thence to the receiver a, where it is highly compressed. The valve or stop- ,cock 1" is then closed in order to retain the gas in compressed condition in the receiver a.
The lever Z is then actuated, so that the hanger is shifted into its median positionviz., so that its gears are out of engagement pressed condition in the receiver a, a small amount being diffused in the pipe (1, as will be understood. When the motor has been stopped and it is desired to start the same, the operations previously described are re-' versed. The lever Z is thrown in a direction opposite to that first named, so that the gearcarrying hanger will be shifted to the left, as shown, and the small gear 1' will engage the motor-shaft gear Z, which in this case is the driven member. It is obvious that when the hanger is shifted as-indicated the crank-arm a of the valve bwill be shifted, as indicated by the arrow 3, whereupon the liquid in the cylinder 1) and pipe 0' will be driven by the gas in the receiver a, the cock r of which has previously been opened, into the cylinder (1 with a degree of force corresponding to the pressure of the gas. The liquid accordingly acts upon the piston e of the rack-cylinder d and forces the rack f outwardly, thereby transmitting motion to the train of gears carried by the hanger and from the gear 7', to which motion was last transmitted to the motor-sliaft gear Z. This last-named gear is therefore rotated at considerable speed and the motor started through the rotation of its shaft m. As soon as the starting operation has been completed the hanger which carroorio
' tion first described.
legs, a train of gears,
By causing the compressed or liquefied gas or other elastic fluidtoact upon the piston and rack f through the intermediary of'a nonelastic fluid the advantage is obtained of suddenly suppressing all ressure in the cylinder (1 as soon as the va ve b is closed, which would not be the case if the gas acteddirectly u on the piston e by reason of the expansion 0? the former.
Having thus described my invention, I claim as new and desire to secure by Letters Patent. j
1. The combination, vvith a motor-shaft gear, of a shiftable hanger mounted adjacent the same and having journaled thereon two gears of different diameters, means for'throwing either of said gears into mesh with said motor-shaft gear, and a power-operated motor-energized device in operative connection with said gears.
2. A starting device including a shiftable hanger provided with separate legs, agear journaled on each of said legs said gears being of diiierent diameters and intermeshing, and a device adapted to drive or to be energized by 3. A starting device embodying a Y- shaped hanger pivoted at the junction of its one of said gears being mounted on the pivot of said hanger and another at the end of each leg, means for oscillating' said hanger, and a power-actuated motor-energized device in operative connection with the gear mounted on said pivot.
4. In combination, with the motor-shaft and the gear thereon, the pivoted hanger in the form of an inverted .Y, the train of cars mounted on said hanger and embo ying ears journaled at the lower ends of the iranches or legs of said hanger and disposed at opposite sides of said motor-shaft gear, the means for pivotally rocking said hanger, and the mechanism adapted to drive or to be energized by the motor-shaft through one of said gears.
5. The combination, with the motor-shaft,-
and the motor-shaft gear, of a pivoted hanger, a train of gears mounted on said hanger and embodying two gears either of which may be shifted by the movement of said hanger into engagement with said motor-shaft gear, another of said train of gears being mounted on the pivot of said hanger, and a power-operated motor-energized device in operative connection with said last-named gear.
6. The combination, with the motor-shaft m, and the motor-shaft gear Z, of a pivoted hanger 1' s t, a gear 9 mounted on the pivot of said hanger, gears i j mounted on-said hanger and each shiftable into engagement with the said rack.
the motor-shaft through said gears.
motor-shaft gear-l by-the pivotal movementof said hanger, means'to transmit the move;
the gear. gand-vice;
engaging said lastnamed e312,
ment ofs aid gears '2', 'j to versa, a rack A I. 0 a and a power-actuated motor-energize .vice in operative connection with said rackQ 7.-In combination, a pivoted hanger, a train of gears mounted on said hanger, a slot-.
ted segment carried by. said hanger, apin movable in the slot of said-segment and car i I rying a roller, a rack guided by saidroller and permanently meshing with one of said gears, and a power-actuated motor-energ gized device in operative connection with 8. A starting device embodying a gas-receiver, a liquid-containing cylinder connected therewith, a piston in said cylinder dividing the gas from t e liquid, a second cylinder connected with the first, a liquid-actuated pis-.
'ton in said'secondcylinder, and means for operatively connecting said last-named piston with a motor-shaft.
9. In combination, with a motor-shaft, a
starting device including a fluid-actuated device, a valve for controlllng the same, a transmitting mechanism shiftable' into and out of coo erative relation with said motor-shaft, an means for automatically opening said valve when said transmitting mechanism is shifted into such cooperative relation.
10. In combination, with the motor-shaft, a starting device includin a fluid-actuated device a valve for contro ling the same, a transmitting mechanism shiftable into and out of operative connection with said motorshaft, and means for automatically closing said valve when said transmitting mechanism is shifted out of operative position with respect to said shaft.
11. In combination, with a motor-shaft, a
the same, mechanism for transmitting motion from said means to said motor-shaft or vice versa, said mechanism being shiftable out of cooperative relation with the motorshaft, and means for automatically opening ducting a non-elastic medium into said cylinstarting device embodying fluid-actuated mo-. tor-energized means, a valve for controlling said valve when said transmitting ine'chander, a valve for controlling thev admission of such medium, transmitting mechanism in operative connection-with said piston and shiftable into and out of cooperative relation'to the motor-shaft, and means for automatically opening said valve when said transmitting mechanism is shifted into such relation and closing said valve when said transmitting mechanism is shifted into inoperative position 13. In a device such as described, a fluidpressure cylinder, 3, piston therein, means for conducting a non-elastic fluid into said cylinder, an oscillating valve for controlling the admission of suc medium, a transmitting mechanism embodying "the pivoted hanger having a train of gears mounted thereon, and a rod connecting said hanger and said valve.
14. The combination with the motor-shaft gear Z, of the hanger 1' s tpivoted-at the junction of its legsor branches, a train of ears mounted on said hanger, either of two 0 said:
ears being shiftable into mesh with the gear the fluid-cylinder d, the piston e in-said'cylinder, the rack f attached to said piston, the
valve b, the crank-arm 0 applied to said valve, and the rod u connectin said arm with the upper portion or shanko -the'hanger 1 ried at the ends of the branches or legs will mesh with said motor-shaft gear, a powercylinder, a piston in said c li-nder, a rack attached to said piston and 1n permanent engagement with the gear journaled on the seam pivot of said hanger, a pipe for conducting a non'elastic medium to said cylinder, an oscillating valve in said pipe, a crank-arm attached to said valve, and a rod connecting said crank-arm with the upper portion or shank of said hanger.
16. In combination, with the motor-shaft gear, a pivoted hanger, a train of gears mounted thereon, power-operated means in operative eng ement with one of said train of gears, an a lever mechanism for rocking said hanger in either direction and thereby engagin either of two of the gears thereon Withsai motor-shaft gear.
17. In a starting device for explosive motors, the combinatlon of a fluid-pressure cylinder, a pistonmovable therein, a rack attached to said piston, a cushioning device interposed between said rack and piston, and a transmitting or coupling mechanism operable by said rack. I
18. In a starting device for motors, the combination, with a device operated by elastic-fluid pressure, of a transmitting or coupling mechanism embodying a train of gears, a piston operated by said elastic-fluid device through the medium of a liquid, a rack' operated by said piston and engaging one of said gears, and a cushioning device interposed between said rack and said piston.
In testimony whereof I have signed this" specification in the presence of two subscribing witnesses. I
EMILE BATISSE. Witnesses:
PIERRE RUIrToN, MARIN VAOHONT
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US25417205A US827496A (en) | 1905-04-06 | 1905-04-06 | Starting device for motors. |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US25417205A US827496A (en) | 1905-04-06 | 1905-04-06 | Starting device for motors. |
Publications (1)
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US827496A true US827496A (en) | 1906-07-31 |
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ID=2895976
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US25417205A Expired - Lifetime US827496A (en) | 1905-04-06 | 1905-04-06 | Starting device for motors. |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2604076A (en) * | 1946-09-17 | 1952-07-22 | Dunlop Rubber Co | Multistroke fluid operated power actuator |
-
1905
- 1905-04-06 US US25417205A patent/US827496A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2604076A (en) * | 1946-09-17 | 1952-07-22 | Dunlop Rubber Co | Multistroke fluid operated power actuator |
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