US1197238A - Valve-operating mechanism. - Google Patents

Description

P. H. SHUE.

VALVE OPERATING MECHANISM.

APPLICATION FILED JULY 7, 1914.

Patented Sept. 5, 1916.

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2 SHEETS-SHEET I.

IN VEN TOR. P (Sf/(1E.

WITNESSES:

P. H. 'SHUE.

VALVE OPERATING MECHANISM.

APPLICATION FILED JULY 1. 1914.

9123. PatentedSept. 5,1916.

2 SHEETS-SHEET 2.

ATTORNEY.

l l PAINT FFTQE.

PHILIP H. SI-IUE, 01? DENVER, COLORADO, ASSIGNOR 'lO ELMER SIKES, 0F DENVER, COLORADO.

.TALVE-OPERATING MECHANISM.

Specification of Letters Patent.

Patented Sept. 5, 1916.

Application filed. July 7, 1914. Serial No. 849,419.

To all whom it may concern:

Be it known that I, PHILIP H. SHUE, a citizen of the United States, residing at Denver, in the county of Denver and State of Colorado, have invented certain new and useful Improvements in Valve-Operating Mechanism, of which the following is a specification.

This invention relates to valveoperating mechanism and its object resides in the provision of a mechanism of simple construction which is capable of converting a continuous rotary motion of a driving element through the medium of an expansive fluid, into alternate motions of a driven element at intervals of variable duration.

While my improved movement may be obviously applied to impart motion to any reciprocatory or oscillatory device, it is particularly adapted for the operation of the controlling valve used in connection with the pumping system described in a co-pending application for patent, Serial No. 849,- 418, filed July 7, 1914, for the alternate admission and exhaust of air to a pair of waterdisplacement chambers.

An embodiment of my invention has been illustrated in the accompanying drawings in the various views of which like parts are similarly designated, and in which,

Figure 1 is a sectional elevation of the mechanical movement, Fig. 2, a longitudinal section through the air-cylinder included in the movement, taken along the line 2-2, Fig. 1, Fig. 3, a face view of the rotary cam and correlative rocker lever used in the construction of the movement, Fig. 4-, a fragmentary elevation of the cylinder looking in the direction of the arrow a, in Fig. 2, Fig. 5, a transverse section taken along the line 5-5, Fig. 2, and Figs. 6 and 7 enlarged sectional views of the controller valve in the two positions to which it is moved to control the admission and exhaust of air in the above mentioned cylinder.

Referring to the drawings by numerical reference characters, 2 designates a supporting structure of suitable construction 011 which the various parts of my improved movement are cooperatively assembled. A horizontally disposed cylinder 3 is provided at its opposite ends with ports wlnch by means of pipes 4 and 5 are connected wlth outlet openings in the housing of a rotary valve 6 which controls the admission and exhaust of air to and from the cylinder. The valve-housing is 'connected with a source of expansive fluid by a pipe 7 and it has an opening 8 for the exhaust of spent motive fluid into the atmosphere.

The valve body 9 which is mounted for rotation in the housing, has two diametrically opposite faces which engage the circular working face in which the various ports of the housing open. These faces are proportioned and disposed with relation to the opposite ports which connect with the pipes 4. and 5, so that when the valve is in its normal position as shown in Fig. 2, they partly cover said ports to shut off the supply of air and place the cylinder 3 at the same time in communication with the atmosphere In the operation of the movement, the valve body 9 is by the operating mechanism hereinafter to be described, moved alternately to the two positions illustrated in Figs. 6 and 7 to place the fluid supply pipe 7 alternately in communication with opposite sides of the cylinder.

A double-headed piston 10 mounted for reciprocation in the cylinder is composed of a pair of leather cups 12 which by means of metal plates and nuts are fixed at the opposite ends of a rod 13. This rod extends loosely through alined openings in the ends of a yoke 14 which carries a pin 15 for its connection with an exteriorly disposed pitman 16. The pin is screwed through a short shank which being formed integral with the yoke, is slidingly fitted in a longitudinal slot 17 in a side of the cylinder and which connects the yoke with a shoe 18 which engages the exterior surface of the cylinder to guide the same against lateral displacement.

To prevent uneven wear and consequent leakage of the piston heads, an appliance is provided for an automatic intermittent rotation of the piston during and by its reciprocating motion. This appliance consists in the construction shown in the drawings, of two members which are mounted for cooperation respectively on the piston and a relatively stationary part. The member asblade 20 which is hinged at one of its ends in an opening 21 of the cylinder wall and disposed to mesh at its inner edge with the teeth of the wheel.

During movement of the piston in the direction of the arrow 0 in Fig. 2, the engagement of the toothed wheel with the inner edge of the blade, will cause a partial rotation of the piston by upward travel of the tooth which engages the upper side of the blade 20, along its inclined face, and when subsequently the movement of the piston is reversed, the engagement of the gear with the edge of the blade, at its hinged end which extends approximately in the plane of the axis of the cylinder, will have no effect on the piston, but merely lifts the detent to the position shown in broken lines in Fig. 4, until it has passed the outer end of the same, when the blade resumes by gravity, its original slanting position.

The pitman which has a pivotal connection with the pin on the yoke, is at its opposite end connected with the wrist of a crank on a rocker shaft 22 which is rotatably mounted in bearings on the supporting structure.

The shaft which in the operation of the mechanism is moved alternately in opposite directions, by its connection with the reciprocating piston is provided with means for transmitting its motion to a driven element such as the air controlling valve 23 of the pumping system disclosed in the above referred to co-pending application for pat-- ent. In the construction shown, the transmission means consist of a sprocket wheel 24, and it will be observed that two or more of these wheels may be mounted on the crank shaft for'the simultaneous operation of a corresponding number of valves.

The hereinbefore referred to mechanism which in the operation of the movement, moves the valve body 9 from its normal po sition alternately to the two positions in whichit connects the fluid supply pipe 7 with the opposite ends of the cylinder, comprises a rotary cam 25 which in its circular working face has at diametrically opposite points, a hump 26 and a depression 27 of corresponding depth. A bell crank lever 28 fulcrumed on the supporting structure carries at opposite ends of one of its arms rollers 29 which engage the face of thecam while its other arm is by means of a pitman 30 connected with a crank arm 31 on the stem of the rotary valve 9. The cam is mounted at the end of a. shaft 32 which is rotatablv supported in bearings on the structure 2 and which carries one of a pair of cooperative, grooved cone pulleys 33 and 34:, the correlative of which is fixed on a second shaft 35 mounted in parallel relation to the other. The last mentioned shaft carries atone of its extremities, a worm wheel 36 .which operatively engages a worm 37 on a transverse shaft 38 which receives its rotary movement by connection with the driving element. In the construction shown in the drawings, this connection is established by means of a pulley 39 and a belt 40.

In the operation of the movement, the slow, continuous rotary movement of the cone-pulley 34 on the shaft 35 is by means of a belt 4:1, transmitted to that on the shaft 32 at any one of the different speeds that can be obtained by the adjustment of the said belt on the two pulleys which as usual are of equal slant and placed on the parallel shafts with their bases in opposite directions. The consequent continuous rotary motion of the cam wheel at the end of the shaft 32 causes it to intermittently impart alternate rotary movements to the bell crank lever, by the engagement of the hump and depression of its face with the two rollers 29. The movements of the bell crank are through the medium of the pitman 3O communicated to the rotary valve 9 which in consequence is moved at regular intervals from its normal position in which both ends of the cylinder are connected with the atmosphere for the exhaust of motive fluid, alternately to the two positions in which said ends are in communication with the opening in the valve housing which connects with the source of fluid supply. The intermittent reciprocating movements of the piston by the alternate admission of motive fluid at the two ends of the cylinder, are converted into alternate partial rotations of the crank shaft which by means of the sprocket wheel 2& imparts its movements to the valve 23 or other operative element with which it is connected.

In the pumping system described in the co-pending application for patent mentioned hereinbefore, the expansible fluid is obtained from an air compressor installed in suitable proximity, and when the movement which forms the subject of the present application is used in connection with said. apparatus, the motive fluid required for the operation of the piston 10 may be derived from the same source while the worm shaft is rotated by connection-with the shaft of the compressor.

Having thus described my improved movement I desire it understood that While the mechanism shown in the drawings is most suitable for the purpose for which it is designed, variations in the construction and relative arrangement of the parts of which it is composed may be resorted to within the spirit of my invention.

Vhat I claim and desire to secure by Letters-Patent is:

1. In combination, a transmission element, a cylinder, :1 piston in said cylinder in driving connection with said element, means for rotating said piston by and during its reciprocating movement in the cylinder, and a mechanically operated valve controlling the supply of motive fluid to the cylinder.

2. In combination, a fluid-driven transmission element, a valve controlling the supply of fluid thereto, a rotary cam, mechanism for transmitting to said cam the rotary movement of a driving element, and a rocker lever for converting the rotary mo tion of said cam into intermittent motions of said valve.

3. In combination, a fluid-driven transmission element, a valve controlling the supply of fluid thereto, a rotary cam, mech anism for transmitting to said cam the rotary movement of a driving element at a selected variable ratio of velocity, and a rocker lever for converting the rotary motion of said cam into an operative movement of said valve.

4:. In combination, a fluid driven transmission element, a valve controlling the supply of fluid thereto, a rotary cam having a circular face provided with a depression and a hump opposite to each other, mechanism for transmitting to said cam, the rotary movement of a driving element, and a rocker lever having opposed rollers in engagement with the face of the cam, and a connection for transmitting the movement of said lever to the valve.

5. In combination, a fluid-driven transmission element, a valve controlling the supply of fluid thereto, a rotary cam, a rocker lever for converting the rotary motion of said cam into an operative movement of said valve, a pair of cooperative cone-pulleys, a shiftable belt for transmitting the movement of one of said pulleys to another, one of said pulleys being mounted for the rotation of said cam, and means for imparting to the other pulley, the rotary movement of a driving element.

6. In combination, a fluid-driven transmission element, a valve controlling the supply of fluid thereto, a rotary cam, a rocker lever for converting the rotary motion of said cam into an operative movement of said valve, a pair of cooperative cone-pulleys, a 'shiftable belt for transmitting the movement of one of said pulleys to another, one

of said pulleys being mounted for the rotation of said cam, and a worm-movement for imparting to the other pulley, the rotary movement of a driving element.

7. In combination, a shaft having motion-transmission means, a piston mounted for reciprocation in connection with the shaft to impart a rotary motion thereto, and a valve mechanism operating independent of the piston movement to admit motive fluid to the piston.

8. In combination, a fluid-driven transmission element, a valve which in a position of rest obstructs the supply of motive fluid to the said element and connects the same with the atmosphere, a driving element, and a mechanism including cooperative members respectively connected with the driving element and with the valve to transmit the movement of the one to the other, the said members cooperating to impart a cyclic operation to the valve, in which it moves periodically from its said position of rest to a position in which it discontinues the connection of the transmission element with the atmosphere and simultaneously connects the same with a source of fluid-pressure.

9. In combination, a transmission element including a piston chamber, a reciprocating piston therein, a valve which in a position of rest obstructs the supply of motive fluid to the said chamber and connects the same at opposite sides of the piston with the atmosphere, a driving element, and a mechanism including cooperative members respectively connected with the driving element and with the valve to transmit the movement of the one to the other, the said members cooperating to impart a cyclic operation to the valve, in which it moves periodically from its said position of rest to positions in which it discontinues the connection of the piston chamber with the atmosphere and simultaneously connects the same with a supply of motive fluid, alternately at opposite sides of the piston.

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

PHILIP H. SHUE. Witnesses:

G. J. ROLLANDET, L. RHOADES.

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

Washington, D. G.

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