US727430A - Valve and operating means. - Google Patents

Description

PATENTED MAY 5, 1903.

0.' H. PEGK. VALVE AND OPERATING MEANS.-

APPLIOATION FILED NOV. 24, 1902.

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N0 MODEL.-

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PATENTED MAY a, 1903.

0. H. PEOK. VALVE AND OPERATING MEANS.

APPLIOATION FILED NOV. 24, 1902.

2 SHEETS-SHEET 2.

I0 MODEL.

INVENTOR WITNESSES: m. 5.

ATTORNEY 7m: mums vzrcns co, mom-Luna, WASHINGTON n. c.

llivrritb STATES Patented May 5, 1903.

ATENT OFFICE.

VALVE AND OPERATING MEANS.

SPECIFICATION formingpart of Letters Patent No. 727,430, dated May 5, 1903.

Applicationfiledhloveniher24,1902. Serial No. 132,506. (No model),

To all whom it may concern:

Be it known that I, OAID' H, PECK, a citizen of the United States, residing at Elmira, in the county of Chemung and State of New York, have invented a new and Improved Valve and Operating Means, of which the following is a specification.- r

This invention relates to improvements in reversing-valves intended more. particularly for use in connection with reversible pneumatic motors as applied to hoists andv other appliances wherein the motor must be controlled from a distance. Theparticular construction of my improved valve as applied to such a motor has already been described by me in my copending application, Serial No. 120,574, filed August 21, 1902, for reversible motor and reversing-valve therefor.

The object of my present invention is to so arrange the valve and its operating-lever that the valve may be readily shifted from a distance to start or to reverse the motor and be positively returned to closed position to stop the motor when the lever is released.

Afurther object is to provide means whereby the operating-lever may be positively set to fully open the valve-ports in either, position of the valve or to "close the said ports,although the operator be unable from hislocation to observe the position of the parts.

I attain my object by means of the arrangement of the valve and the operating-gear, as illustrated in the accompanying drawings, in which- Figure 1 represents an end elevation of a pneumatic motorcase, showing my valve and operating-lever as applied thereto; Fig. 2, a transverse section of the same, and Figs. 3, 4, 5, and 6 details showing the ports and passages leading through the valve to the passages in the shaft upon which the motor-cylinders revolve.

Like letters refer to like parts in the several views.

A represents the head of a motor-case, to which a motor is secured by means of the stud J. I Surrounding thisistud in an annular valve-chamber B is an annular valve E, provided with suitable ports and passages, as described in my said copending application, whereby the motive fluid, which enters the valve-chamber by way of the inlet C, may be directed to the motor-cylinders to drive them :in either direction, the exhaust from said cylinders taking place through exhaust-passages in the valvev and the outlet D. These ports and passages comprise the port j in chamber g of the valve, which communicates with the inlet 0 and the two exhaust-ports iz'in said valve, which are located in the exhaust chamber of the valve,-which communicates with the outlet D. These two exhaust-ports are so-positioned with reference to the port j that one or the other of them will be in register with ports in and Z, leading from the valve-chamber, when the port j is placed in register with one or theother of said ports 76 or Z. These ports 7t Z lead to the passages m n' in the shaft 0, upon which the motor-cylinders revolve, and through suitable ports, in which passages the motive fluid is admitted to and exhausted from said cylinders. In the position assumed for the parts in Fig. 4 it will be seen that the admission-portj is midway between the ports Z and that the motive fluid is therefore cut off from the motor. By turning the valveeither to the right or left it will be understood that the motive fluid .will be admitted throughone'or the other of said ports 70 Z and exhausted from the other, thereby causing the motor to rotate in one direction or the other. The valve is held within the valve-chamber by means of the ring F, which is screw-threaded into the outer end of said chamber, and the valve is operated by means of the two-armed lever H, the arms of which project from the ring G,which is secured to the exposed face of the valve by means of the screws I, said ring encircling the nut by which the stud J is secured to the casing-head. At the outer ends of the arms of lever H are eyes L, to which may be attached operatingcords by which the lever may be shiftedfrom a distance. To each arm of the lever, and connected to it by a pin and1s1ot"connectionl O and N, I attach what I term the right and left spring-stops M. These stops are provided with shoulders which abutagainstthe fixed guide-studs Q, which projectbut from the casing-head. Rods P pass up through these guides from the stops M and are adapted to reciprocate therein. Coiled springs S are placed around the rods between the guides and the jam-nuts R secured to the outer ends of the rods.

As the valve is shown set in Fig. 1, the admission of the motive fluid through the valve will be cut off, and the valve will be held in this central or closed position by means of the springs S, which draw the stops M up against the guides Q, the lower ends of the slots N in each stop engaging the pins 0 upon the lever-arms and holding said leverin this central position. To shift the valve so as to admit the motive fluid to run the motor in one direction, the right-hand arm of lever H will be pulled downward, thereby drawing down the right-hand stop M and causing the pin O'on the left-hand arm of the lever to engage the upper end of the slot N in the left-hand stop M when the admission-ports in this direction are fully open. W'hen the lever is released, the spring on the righthand stop will return said stop to' its normal position, thereby closing the valve and cutting off the fluid-supply. To run the motor in the reverse direction, the left-hand arm of the lever will be pulled down, thereby changing the direction of the fluid through the valve-chambers to and from the motor-cylinders. In so reversing the valve the left-hand stop will be drawn down, and the slot in the right-hand stop will limit the throw of the valve. Upon again releasing the operatinglever the valve will return to its closed position by reason of the pressure of the spring on the left-hand stop. By this arrangement of the slotted spring-operated stops the throw of the lever in either direction is so limited that the valve cannot be thrown beyond its fully-opened position in either direction and will be automaticallyreturned to closed position immediately upon releasing the lever, and the operator, although located at a point from which he cannot observe the position of the lever, will know positively when the valve is fully open in either direction and will have the assurance that it Will be positively closed when he releases the lever. The flow through the valve may be also governed to reduce the speed of the motor by pulling down to less extent upon the lever at either side.

While I have described my valve and operating-gear as applied to the casing-head of a motor, I do not desire to be understood as said rods slide, and coiled springs on said rods between the guides and the free ends of the rods.

3. The combination, with an oscillating reversing-valve, of a two-armed lever, rods coupled to the arlnsof said lever by pin-and-slot connections, guides in which said rods slide, shoulders on the rods to abut against the guides to limit motion in one direction, and coiled springs on the rods between the guides and the free ends of the rods.

4. The combination with a motor-casing, of a valve-chamber in the casing-head, an oscillating reversing-valve within said chamber, a two-armed lever attached to said valve, rods coupled to the arms of said lever upon opposite sides of the valve with a pin-andslot connection, guides for said rods projecting from said easing-head, shoulders on said rods abutting against the guides, and coiled springs on the rods between said guides and the free ends of the rods.

0. The combination with a motor-casing, of

a cylindrical valve-chamber in the casing head, an oscillating reversing-valve occupying said chamber, a screw-ring by which said valve is held to its seat within the chamber, a two-armed lever attached to the exposed face of the valve, rods coupled to the arms of said lever upon opposite sides of the valve with a pin-and-slot connection, guides for said rods projecting from the casing-head, shoulders on the rods abutting against the guides, and coiled springs on the rods between the guides and the free ends of the rods.

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

CAID H. PEOK. Witnesses:

J. M. GULIOK, O. W. PECK.

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