US1158525A - Fluid-pressure motor. - Google Patents

Description

E. W. MEREDITH.

FLUID PRESSURE MOTOR.

APPLICATION FILED JAN-7. 1915-.

Patented Nov. 2, 1915.

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FLUID PRESSURE MOTOR. APPLICATION FILED JANJ, I915.

1,1 58,525.. Patented Nov. 2, 1915.

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wihweoom EDWARD MEREDITH, 0F EEYNOLDSVI FOURTH TO EDGAR VERNON STEEL LLE, PENNSYLVANIA, ASSIGNOR or oNE- L, or 'CRENSI-IAW, PENNSYLVANIA.

FLUID-PRESSURE MOTOR.

' Specification of Letters Patent.

"Patented Nov. 2, 31915.

Application filed January 7, 1915. Serial No. 848.

To oZZ whom it may concern:

Be it known that I, EDWARD W. nrri-r, a citizen of the United States of America, residing atReynoldsville, in the county of Jefferson and State ofPennsylvania, have invented certain new and useful Improvements in Fluidl ressure .Motors, of which the following is a specification.

The present invention relates to improvements in fluid pressure motors, and is designed especially for use in connection with brick making machines.

lhe primary object of the invention is the provision of facile, efficient and economical means for returning the table of brick making machines to normal position after the cut in the bricks has been made, but while the invention is specifically described in connection with machines of this character 1t will of course be understood that the motor is equally applicable for'use in connection with other machines in which this single acting piston motor is desired.

The invention consists essentially in certain novel combinations and arrangements of parts whereby the single acting piston is controlled and actuated to operate the motor, as will be pointed out hereinafter.

In the accompanying drawings I have illustrated one complete example of the physical embodiment of my inventionconstructed according to the best mode I'have so far devised for the practical application of the principles of my invention, and which has proven highly satisfactory and efficient in actual practice upon brick making machines.

Figure 1 is a side elevation of a motor involving my invention. Fig. 2 is a longitudinal, horizontal, sectional View of Fig. 1, showing some parts in elevation, and the motor inert at the end of its working stroke. Fig. 3 is an end view of the motor. Fig. 4 is an enlarged horizontal longitudinal sectional view of the controlling valve and its casing showing the valve in position to fur- .nish steam or other motive fluid to the cylinder to move the piston. Fig. 5 is a sectional view on line 5 5 of Fig. 4. Fig. 6 is a plan view of the controlling valve.

In the preferred embodiment of my invention I have illustrated the device as employing steam as the motive fluid, and while I shall hereinafter refer to the motive power as steam it will of course be understood that other power such as compressed air might also be used if des1red.

The piston-stem l and its piston 2 are in direct connection with the table of the brick machine, at the threaded end 3 of the stem, and it will of course be recognized that the table is a reciprocable one and is to be drawn to the right by. the movement of the piston to the right in its cylinder 4 and moved to the left to return the pistoinby other power mechanism forming part of the brick machine. The cylinderis of usual construc tion and suitable dimensions and is equipped with the heads 5 and 6, the latter having a relief cock 7 opening into the cylinder to regulate a cushion of compressed fluid in the end of the cylinder. The head 5 vided with a stuffing box or gland 8 for the pistonstem l, and the heads are both secured to the cylinder by usual bolts and nuts. The piston in thecylinder is a single acting piston, and as before stated its work-' ing stroke in the present showing of the invention is to the right, but the cylinder is provided with the usual endports 9 and 10, the former foradmission of steam and the latter for exit of steam. The steam for actuating the piston is controlled by the piston valve 11 which is reciprocable in its casing 12 by powerisuch as -a-cam or..crank: .not

shown applied at the end of the valve stem 13. The casing, at one end, is in communication with the cylinder t through port 9 by the connecting pipe 1 L which is the inlet pipe for live steam to the cylinder for op erating the piston. A pipe 15 which also extends from the left end of the casing 12, passes around to the right end of the cylinder and communicates with its interior through the head 6. This pipe has a check valve 16 therein and the communication is provided between the casing and cylinder to prevent the formation of a vacuum at the right end of the cylinder when the piston moves to the left.

As clearly shown in Figs. 2 and 4: the valve casing is provided with annular recesses or ports 17 and 18, the former for the inlet pipe to the cylinder, and the latter for exhaust from the casing, and this port 18 permits passage of exhaust steam to the exhaust pipe 19 of the casing. A third port is shown in the valve casing, indicated is pro-- at and this port is in communication with the interior. of the'cylinder throughthe cylinder port 10.

In'Fig. 1 it will be seen that the valve 11 has a passage 21 extending therethrough,

- cation between the interiorof the valve casing and the interior of the valve itself. The

I valve is also cut away and its exterior diameter reduced toform an annular space 23 within'the casing by means of which communication between the inlet pipe 24 to the casing and inlet pipe'l l of the cylinder through the port 17 in the casing.

The'joperation of the motor is as follows:

Referring to Fig. 2 it will be seen that the piston 2 has finished its working stroke,

having'pulled the table to the right. Ad-

- mission of live steam to the casing is out off except to the space 23, and the pressure of steam throughout the cylinder pipe 14, the

centrally bored valve 11 and pipe 15 is equalized, sothat the return reciprocation of the table will move the piston to the left in Fig.2. .After the piston has been moved to theleft, the piston valve is actuated and moved to the left also, as shown in Fig. 4. Now the live steam is admitted through space 23', port 17 and inlet pipe 14 to the cylinder at the left of the piston head, but passage of steam to the right in the casing or through the valve bore is prevented.

However, steam is exhausted from the right side of the piston through the ports 10, 2 0

and 18 and outlet pipe 19,but a vacuum is prevented therein by the presence of the check valve 16 which provides for the retention of a slight pressure of steam snfiicient to prevent the vacuum. The admis sion of fluid pressure to the left of the piston of course moves it to the right and thus the working stroke of the motor is accomplished. The cushion at the right end of the cylinder a may be regulated by the position of the cock7, and this may be determined by the requirements of different conditions.

What I claim is 1. In a single acting motor, the combination with its cylinder and its piston, of a casing having a valve therein and a motive fluid inlet, ports at the ends of the cylinder in communication with the ports in the casing, said valve having means for equalizing pressure in the cylinder upon the return stroke of the piston and said valve adapted to admit motive fluid to the cylinder at one end and exhaust the same from the cylinder at its other end.

2'. In a single acting fluid pressure motor, the combination with a cylinder and its piston, of a casing having a motive fluid inlet, exhaust port and end ports communi eating with said cylinder, a piston valve controlling said ports and having a passage therethrough, whereby motive fluid may be furnished to one side of the piston, and exhaust fluid be withdrawn from the other side of the piston through said passage, and the pressure equalized in the cylinder on the return stroke of the piston.

In testimony whereof I afiix my signature in presence of two witnesses.

EDWVARD W. MEREDITH.

Witnesses EDGAR V. STEELL, GLENN BnNMNGEs.

- Copies .of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C.

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