US579186A

US579186A - Valve

Info

Publication number: US579186A
Authority: US
Publication date: 1897-03-23
Anticipated expiration: 1914-03-23

Description

(No Model.) 2'Sheets-Sheet 1. -A. SICKAFOOSE 8v W. E. WYATT.

(No Modl.) 2 sheets-sheen 2. A. SICKAPOOSE 8v W. E. WYATT.

VALVE.

Patented Mar. 23, 1897.

Nirn *rares ALBERT SICKAFOOSE AND VILLIAM EDWARD WYATT, OF LYONS, IO'WA. y

VALVE.

SPECIFICATION forming part of Letters-Patent N o, 579,186, dated March 23, 1897.

Application filed March 17, 1896.

To @ZZ whom t may concern.-

Beit known that we, ALBERT SIcKAFoosE and WILLIAM EDWARD WYATT, citizens of the United States, residing at Lyons, in the county of Clinton and State of Iowa, have invented a new and useful Valve, of which the following is a speciication.

Our invention relates to valves designed particularly for use in connection with a steam feed cylinder for sawmillcarriages which support logs during the sawing operation, and also adapted for use in connection with steam-pump cylinders and steam-engine cylinders, the object in view being to provide a steam-tight balanced valve requiring the minimum throw to accomplish its adjustment to feed and exhaust the motive agent.

Further objects and advantages of this invention will appear in the following descrip-v tion, and the novel features thereof will be particularly pointed out in the appended claims.

In the drawings, Figure 1 4is a front view, partly in section, of a feed-cylinder apparatus embodying valves constructed in accordance with our invention. Fig. 2 is a longitudinal section of the improved valve. Fig. 3 is a transverse section of the same. Fig. l is a detail View ofthe bushing detached. Fig. 5 is a detail view in perspective ofthe means for connecting twin valves for simultaneous operation.

Similar numerals of reference indicate corresponding parts in all the figures of the drawings.

` We have shown the valve embodying our invention in connection with a steam-feed cylinder l of the ordinary construction, and a valve 2 is arranged in communication with each end of the cylinder for admitting steam to communicate motion in opposite directions to the piston 3.

The improved valve embodies a cylindrical casing 4, open at both ends and provided at diametrically opposite points with steamports 5 and 6 and also at diametrically opposite points with cylinder and exhaust ports 7 and 8, the eXhaust-port being branched, as shown at 8a and Sb. The casing is thickened,

as shown at 9, contiguous to and covering each port and is provided with an interiorlythreaded collar lO for the reception of a pipe.

Serial No. 583,564. (No model.)

Branches 11 and 11b of the steam -supply pipe 11 are threaded in the openings communicating with the steam-ports 5 and 6. A connecting-pipe 12 is threaded into the opening communicating with the cylinder-port?, and also is arranged in communication with the cylinder, and an exhaustpipe 13 is threaded into the opening communicating with the branched exhaust-port 8.

A cylindrical bushing 14 is tightly fitted in the bore of the cylindrical casing, the same being preferably forced to place by hydraulic pressure, and this bushing is provided with steam-ports 15 and 16, a cylinderport 17, and exhaust-ports 18, registering', respectively, with the corresponding ports in the casing and of less width than said ports in the casing. The ports in the casing are made of greater width than required for the ad-l mission and exhaust of the motive agent, whereby in fitting new bushings to the casing any slight variation in the disposition of the ports in the bushing will not render the device inoperative by partly closing and thus obstructing the openings.

The improved valve further embodies a rotary plug 19, preferably cast solid and subsequently bored and longitudinally slotted, as shown at 20, to form a plurality of gates 21, adapted to close the ports inthe bushing. The object in employin ga branched exhaustport resides in the fact that the branches thereof may be closed and opened with the same throw or movement of the plug as the steam-ports, while the capacity of the eX- haust-port is double that of each steam-port. The cylinder-port is permanently open, and the movement of the plug in opposite directions alternately opens and closes the steam and exhaust ports, the steam-ports being open when the exhaust-ports are closed, and vice versa.

The bushing is open at both ends and is equal in length with the casing, and the bore of the bushing is tapered continuously from one end to the other to receive the exteriorlytapered or conical plug, which is of greater length than the casing, whereby adjustment of the plug may be accomplished to coinpensate for wear of the seat or inner surface of the bushing. The means which we employ for holding the valve-plug at the de- IOO sired adjustment to allow easy movement and at the same time prevent leakage of steam embody an axial shaft or spindle 22, fixed in the ends of the plug and projecting beyond the extremities thereof, as shown clearly in Fig. 2. The ends of the spindle are provided with center-bearings 23, in which are seated center-points 24, formed upon the inner extremities' of set-screws 25, said set-screws being threaded in axial guides 26, carried by brackets 27, bolted to the extremities of the casing. When the surface of the valve-plug or bushing becomes worn sufficiently to allow leakage, both plug and seat may be ground by the usual application of emery and oil and La continuous rotary movement of the plug, after which the plug may be adjusted and secured in the desired position by means of the center-points. When the parts become worn to such an extent as to prevent further adj ustment, a new bushing may be applied, and as the cost of a bushing is less than that of a plug it will be seen that the valve may be repaired and rendered practically as efiicient as when new without the expense incident to the repair of valves of the ordinary construction.

The ports, both in the bushing which forms the valve-seat and in the plug, are elongated parallel with the axis of the valve (see Fig. 2) to make them of the requisite capacity with the minimum width in order to provide for the reversal of the passage of fluid through the valve or the alternate opening of the exhaust and steam ports with the minimum throw of the plug.

Various means may be employed for communicating the necessary rocking movement to the plug, according to the kind of cylinder in connection with which the valve is used, but when the valve is employed in connection with steam-feed cylinders, as illustrated in Fig. l, an operating or sawyers lever 28 is rigidly secured to one of the extensions of the plug-spindle 22, and is provided at intervals with center sockets or bearings 29, arranged in pairs upon opposite sides of the lever and spaced from the axis of the spindle to correspond with similar center sockets or bearings upon a corresponding lever of the coperating valve at the opposite end of the steamfeed cylinder. A connecting-rod 30 is arranged between said levers and is provided at its extremities with adjustable centerpoints 3l to engage said opposite center sockets or bearings, whereby the movement of one of the operating or sawyers levers communicates motion simultaneously to the valveplugs.

The adjustable connection between the rod 30 and the levers provides for changing the relative movement between the operating-lever 28 and the valves.

It is obvious that when used in connection with pumps or steam-engine cylinders the valve embodying our invention may be operated by means of eccentric or other Valvegear forming no part of our present invention and being well known to those skilled in the art.

The bushing is counterbored, as shown at 32, between the ports therein in order to reduce the wearing of the plug and facilitate grinding and lubrication, lubricating material being supplied by means of oil-cups 33, located, respectively, at the ends of the casing and communicating with oil-holes 34, formed in the casing and arranged in registration with similar holes in the bushing.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the spirit or sacricing any of the advantages of this invention.

Having described our invention, what we claim is- 1. A valve having a cylindrical casing provided in its seat with a lateral cylinder-port and a plurality each of steam and exhaust ports elongated parallel with the axis of the casing, the exhaust-port being branched with its arms deflected inwardly to tap the seat at intervals, and the steam and exhaust ports being of less width than the cylinder-port, and a rotary plug seated in the casing and provided with alternate elongated openings and gates arranged parallel with the axis of the plug, the division of the steam and exhaust ports providing for the reversal of the passage of iiuid through the valve by the minimum movement of the plug, substantially as specified.

2. A valve having an open-ended cylindrical casing, an open-ended bushing removably fitted in the bore of the casing and having its bore tapered longitudinally to form a seat, said bushing and casing having registering steam, cylinder and exhaust ports of which those in the bushing are elongated parallel with the axis of the casing, a hollow plug fitted in said seat and provided with longitudinal slots or openings and intervening gates to cover said ports, said plug being longitudinally tapered, and means for holding the plug at the desired adjustment to compensate for wear, substantially as specified.

3. A valve having a casing provided with opposite steam-ports and opposite cylinder and exhaust ports, the exhaust-port being branched with its arms deflected inwardly to tap the bore of the casing at intervals, an open-ended slotted bushing tted in the casing and having ports registering, respectively, with the steam and cylinder ports of the casing and with the branches of the exhaust-port therein, and a hollow rotary plug fitted in the bore of the bushing and provided with openings and intervening gates to close said ports, substantially as specified.

4. In a valve, the combination with a casing having a tapered open-ended seat and lateral ports, of a hollow rotary plug fitted in said seat and provided with corresponding lateral ports, a spindle fixed axially to the IOO IIO

plug and extending beyond the extremities thereof, threaded guides supported by brach` ets secured to the extremities of the casing,

and center-points having threaded Shanks with opposite adjustable center-points to engage said center bearings or sockets whereby 15 the extent of relative movement of the connected valves may be varied to secure proper coperation, substantially as specified.

In testimony that we claim the foregoing as our own we have hereto affixed our signatures zo in the presence of two witnesses.

` ALBERT SICKAFOOSE.

WILLIAM EDWARD VYATT. Witnesses:

J. A. MADDEN, CLARA FLAvERs.