US404528A

US404528A - Hydraulic engine

Info

Publication number: US404528A
Authority: US
Publication date: 1889-06-04
Anticipated expiration: 1906-06-04

Description

(No Model.) 2 Sheets-Sheet C. E. FOSTER.

HYDRAULIC ENGINE.

No. 404,528. Patented June 4, 1889.

r I 2 Sheets-Sheet 2.

O. E. POSTER.

HYDRAULIC ENGINE. No. 404,528. Patented June 4, 1889.

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UNITED STATES PATENT OFFICE.

CHARLES E FOSTER, OF \VASHINGTON, DISTRICT OF COLUMBIA, ASSIGNOR TO THE HYDRAULIC ELEVATOR COMPANY, OF CHICAGO, ILLINOIS.

HYDRAULIC ENGINE.

SPECIFICATION forming part of Letters Patent No. 404,528, dated June 4, 1889.

Application filed January 7, 1884. Serial No. 116,674. (No model.)

To aZZ whom it may concern:

Be it known that I, CHARLES E. FOSTER, a citizen of the United States, and a resident of the city of Washington, in the District of Columbia, have invented certain new and useful Improvements in Hydraulic Engines, of which the following is a specification.

My invention is a hydraulic engine constructed, as fully described hereinafter, so IO that the water may be brought to act under pressure upon the piston, and so that the return movement may be effected by the weight of the load, while the water circulates from one end of the cylinder to the other with little or no waste.

In the drawings, Figure I'is a sectional elevation of a hydraulic engine embodying my invention. Figs. 2, 3, and 4 are sectional elevations showing the parts in different posi- 2o tions. Fig. 5 is a detached view showing a valve-locking device.

The cylinder A is shown in a vertical position, but it may be horizontal or inclined, and may be combined with any mechanism or 2 5 appliances to be operated, as an elevatorplatform, gun-carriage, turret, &c.

The piston B is connected to the piston rods or rod C, which extends through the usual packing-box, and the motor-fluid under pressure is conveyed through a pipe D to a valvechest E, and is admitted to the cylinder ends through pipes F G. The chest E has discharge-portsoo y at opposite ends, each com municating with the discharge-pipe H, and a 3 5 valve I in the chest is constructed in any suitable manner to permit the motor-fluid to be directed to either end of the cylinder A, and

the opposite end to be simultaneously put into communication with the discharge-pipe 40 H, and also to permit the motor-fluid to be wholly cut off from the cylinder A. As shown,

the valve consists of a spindle a, with a cylinder-valve c and disks 1) d, and with a rackextension engaging with a pinion on a shaft e, carrying a pulley J round which passes the operating-rope IV.

In a pipe or'channel K between the pipes F G is a valve L, with a port 20, and in the valve-case is a port 11, communicating through a pipe j with a tank or reservoir M of water.

hen the valve I is in the position shown in Fig. 1, the water passes to the lower end of the cylinder A, lifts the piston, and the water above the piston is discharged from the upper end of the cylinder. When the valve is in the position Fig. 3, the water enters the upper end, depresses the piston, and the water below the piston is discharged from thelower end of the cylinder.

hen the piston B has been carried in either direction under pressure as far as is desirable, and it is requisite to return it, I avoid waste of water by putting the opposite ends of the cylinder into communication,

closing the communication with the supplypipe D by bringing the valve I to the position shown in Fig. 2,'the valve L being also adjusted to permit the water to circulate through the passage to from one end of the cylinder to the other.

It would not be practicable to circulate the water from one end to the other of the cylinder A without some provision for compensating for the difference in capacity of the cylinder upon opposite sides of the piston, re-

sulting from the presence at one side of the piston-rod C. I therefore use a tank or reservoir M as a receptacle and supply. The operation of this tank will be best understood from inspection of Figs. 2 and 4:.

In Fig. 2 the communication with the supply-pipe D is shown as cut off after the piston B has been lifted by water under pressure. The valve L is now open and the piston B dey scending by the weight of the load, the water passing from below the piston through the pipes G K F to the top of the piston. As the space above the piston, owing to the presence of the rod 0, is less than that below it, there is a certain amount of surplus water from the 0 lower space, which passes through the ports w '2) into the tank M, the piston descending under the pressure of the load without other loss of water than that which passes into the tank, and which is equal to the amount displaced by the piston-rod. After the piston has been again raised it may be lowered under the weight of the load, as before, the tank M receiving the displaced water. Where the pressure has been brought upon the upper 10o side of the piston and the latter forced tothe position shown in Fig. 4, and the effect of the load is to draw out the piston, the valve L is opened to permit the water to circulate as before; but in this case, as shown in Fig. 4, the water passes from the upper side of the piston to the lower side, there being therefore insuflicient water from above to fill the space below the piston, so that a part of the water from the tank 11 will flow through the ports 4* to into the Circulating stream and will supply the deficiency.

It will be evident that where the pressure is frequently changed from one side of the piston to the other the water displaced at one stroke will be taken up at a subsequent stroke, so that there is little, if any, actual waste.

It is of course important that the valve L shall not be opened at the time the pipe 1) in communication with the cylinder. I therefore provide means for locking the valve L until the valve I has closed the port leading to the pipe D. Different means of effecting this will depend upon the kind of valve device used and will occur to any one skilled in the art. That which I have devised is shown in Fig. 5, and consists of a spindlef, carrying a drum g, and revolved by a worm and wheel from the revolution of the spindle e, and a lever N, with two lugs m n, for engaging in notches 11 in a disk P on the spindle of the valve L. The lever N is suspended by a cord twound on the drum, and the parts are so adjusted that the lever N will be in the position shown in Fig. 5 only when the valve I has closed the inlet-port, any movement of the valve I in either direction resulting in the raising or lowering of the lever and the locking of the valve L.

The rim of the pulley J is provided with teeth or notches r, and the pulley R on the spindle of the valve L has a notch a, adapted to receive a projection n on a leverQ, pivoted at 3, and carrying a bolt 8, the end of which when raised will engage with the teeth 9'.

It will be evident that the pulley J can be turned only when the valve L is shut, as any attempt to turn the latter will. depress the outer end of the lever Q and lock the pulley .I. By this means the valve L can be turned only when the valve I has closed the inletport, when it may be revolved to any required extent; but the instant it is moved it locks the pulley J and keeps it locked until the adjustment of the valve L is such as to close the port 10.

It will be seen that the valve L serves both to control the circulation through the pipe K and the passage to the supply and receiving tank; but it will be apparent that two valves may be used for this purpose, and that valves of different forms may be substituted for those shown. It is not essential, while it is advantageous, that the supply or receiving tank communicate with the circulating-pipes, as the communication maybe made with any partof the circulating channel-as, for instance, with the cylinder, as shown in dotted lines, Fig. 3, where the valve L in the pipej' which the pressure is brought only upon one side of the lifting-piston.

\Vhere the engine is used for an elevator, the valves are provided with operating-ropes h 71;, or connections whereby each may be operated from the platform.

I do not here claim; broadly, the combination, withan elevator having a circulating channel, of a supply or receiving tank or chamber, as this forms the subject of Letters Patent issued to me February 1, 1887, No. 357,1i7.

I elaim- 1. In a hydraulic engine, a cylinder, a piston therein, a main-\ 'alve device opening and closing communication between the cylinder and its supply, and pipes connecting said 1nain-valve device with the cylinder at opposite ends, in combination with a passage to permit circulation between said latter pipes independent of the main-valve device, a valve to close said passage, and connections be tween said valve and the elevator-cage, sub-' stantially as described.

2. A hydraulic engine provided with a cylinder, piston, circulating, supply, and discharge pipes, and stopping and starting valve device whereby the water circulates While the supply is cut oft from the cylinder, and

with a supplemental-valve device and communication between the same and a tank, and with connections between said supplemental valve device and the cage, whereby at the will of the operator in the cage to establish and cut ott' communication independent of the main-valve device between the circulating-pipes and the tank, substantially as described.

A cylinder, a piston operating therein, main valve and casing, and circulating-pipes F and G, to connect the opposite ends of said cylinder with the main-valve chamber, in combination with a circulating'pipe. K, connecting said pipes I and G, a pipe connecting said circulating-pipe K with a water-tank, and a valve arranged in said pipe K to open or close communication between the circulatingpipes F and G and between the circulating pipe K and the pipe connected thereto, substantially as described.

4. The combination, in a hydraulic engine, of the cylinder, its piston and rod, and its supply and discharge pipes and their operating valves with a circulating pipe or channel, a supply and receiving tank in connnunication therewith, and a valve to control said coinnuinication. independent of the main-valve device, substantially as described.

5. A cylinder, a piston operating therein, circulatin g-pipes F and G, connect-in said cylinder with the main-valve chamber, and avalve in said chamber to close communication with the supplyin circulating, in combination with a circulating-pipe K, interposed between said pipes F and G, and having a valve, and a communication with a tank independent of the main discharge-pipe, and means, substantially as described, 'to operate said valve from the cage, substantially as and for the purpose specified.

6. The combination, with the cylinder, the piston head and rod, the supply, discharge, and circulating pipes or channels and their controlling valves of a doubleacting hydraulic engine, of a supply and receiving tank communicating with the circulating pipe or channel through an opening controlled by a supplemental valve independent of said main valve, and means, substantially as described, to operate said supplemental valve, as and for the purpose specified.

7. A cylinder, a piston operating therein, and circulating-pipes F and G, connecting the opposite ends of said cylinder with the main supply and discharge pipes, in combination with a circulating-pipe K, connecting said pipes F and G, a water-tank in communication with said pipe K, and a valve device adapted to simultaneously open or close communication between the circulating-pipes F and G and said pipe K and the water-tank, substantially as described.

8. In a hydraulic engine, a main supplypipe, a valve-chamber communicating therewith, and pipes F and G, connecting said valve-chamber with the opposite ends, respectively, of a cylinder, in combination with a pipe or channel between said pipes F and G, a receiving and supply tank separate from the main supply, a pipe or channel forming a communication between said tank and the circulating-pipe, and a valve adapted to simultaneously open or close communication between the pipes F and G and pipe K and tank, substantially as described.

9. The combination of the cylinder, piston, and piston-rod, pipes F G, valve-case communicating with the water-supply channel and provided with a valve, pipe connecting the pipes G and F and valve in said pipe, supply and receiving tank, and connections between the platform and the valves, whereby both may be operated from the platform, substantially as set forth.

10. The combination of the cylinder, its piston and piston-rod, and circulating-pipes having a valve, and the supply-tank, with a case containing the main valve and provided with two discharge-ports and an intermediate port connecting with the supply-pipe, substantially as described.

11. The combination, with the hydraulic engine and its circulating-pipes, of amain valve controlling the supply to and discharge from the cylinder, a supply and receiving tank, and an independent valve controlling communication therewith, and mechanism, substantially as described, to hold one of said valves in stationary position While the other is being operated, as and for the purpose specified.

12. In a hydraulic engine, the combination, with an independent valve to control communication through the circulating-pipe thereof, and a notched disk, and a locking-lever, of

mechanism, substantially as described, to op-,

erate said disk and lever to hold said Valve in fixed position, as and for the purpose specified.

13. The combination, with the main valve and its toothed operating-pulley, and the independent valve of the circulating-pipe, of a locking-bolt and lever controlled by said independent valve, substantially as described.

14:. The combination, with the main valve, its toothed operating-pulley, and a bolt adapted to engage therewith, of a lever adapted to engage and hold a valve within the circulating-pipe in stationary position when the main valve is being operated, substantially as described.

15. The combination, with the main valve, its toothed operating-pulley, and a bolt adapted to engage therewith, of an independent valve Within the circulating-pipe, a notched disk secured to said independent valve, a locking-lever to engage said disk, and means, substantiall y as described, to move said lever into and out of engagement with said disk, as and for the purpose specified.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

' CHARLES E. FOSTER.

\Vii n esses:

A. E. T. HANSMANN, JOHN G. HINKEL.