US659458A - Valve-gear. - Google Patents

Description

NITED STATES PATENT OFFICE.

VALVE-"G EAR.

SPECIFICATION forming part of Letters Patent No. 659,458, dated october 9, 1900. Application filed August 18, 1899. Serial No. 727,676. (No n10-del.l

To au w/tom, t may concern'.-

Be it known that l,- LESLIE STEEIEa citizen of the United States of America, residing at Washington, in the county of Washington and State of Pennsylvanimhave invented certain new and useful Improvements in Valve- Gear, of which the following is a specification,

reference being had therein to the accompany-V ing drawings.

This invention relates to certain new and useful improvements in va1ve-gear,and has lfor its object to provide an improvement in gearing of this type whereby the motion vof the engine may be controlled at the will, of the engineer.

The invention is particularly adapted -to be employed in connection with engines employed for drilling oil and gas wells and the like and aims to provide means whereby'the engineer may readily control the engine when located a considerable distance therefrom.

In drilling oil and gas wells the engine .employed is usually'for the sake of safety located at a considerable distance from the'der' rick in which the drilling-tools are suspended and it is desirable that the engineer ory operator when in the derrick may have a` convenient means at hand whereby the engine may be controlled, and to provide such a means which will be simple in construction, strong, durable, and effectual in its operation is the primary object of my invention.

Brieiiydescribed, my invention consists of an operating-rod which is mounted to rotate and reciprocate longitudinally. This operating-rod is connected at its one end to the inlet-valve of the steam-chest and controls said valve byits rotary movement. It is also connected with the valvestem of the. valve which admits and exhausts steam to each end of the cylinder, which it controls by its longitudinal movement, and the particular construction by which this is attained, together with the various details entering into the invention, will be hereinafter more specifically described and then particularly pointed out in the appended claims.

ln describing the invention in detail reference will be had to the accompanying drawings, forming a part of this specification, and wherein like figures of reference will be used to designate similar parts throughout the several views, in which-h y Figure 1 is a side view of my improved valve= gear, partly in section and partly broken away, showing the same in position for con= trolling the'engine. Fig. 2 is'a longitudinal sectional view of the operating-rod. Fig. 3 is a perspective view of the bracket which forms a support for the operating-rod and rotating rod or shaft and incloses the operating cogs ,or gears which rotate the operating-rod. Fig. l4 is a transverse vertical sectional view of the operating-rod, taken on the line 4 4 of Fig. 2.

Referringto the drawings by reference-nufl'nerals, l indicates the steam-chest, 2 the cylluder, and 3 a steam-inlet pipe connected to the steam-chest and having interposed therein a throttle-Valve 4, provided with the stem 5.

.In Fig'. 1 of the drawings l have shown a portion of the derrick or other device from Where the engine is to be controlled, 6 and 7 indicating the two standards or supports in which the operating-rod is supported. This operating-rod consists ofthebarrel portion 8, having theround stem 9 of less diameter projecting from its closed end, with the portion of said stem that operates in the standards 6 and 7 squared, as shown at 10, and the operating-handle ll-suitably mounted on its free end, this handlebeing preferably mount-ed thereon so as to be easily gripped from different positions. To the face of the standard or support 6 is secured a bracket orkeeper 12, having apertures 14 and 15 to receive the operating-rod and the rod orvshaft which rotates-theoperatingwod The aper ture 14 is in alinement with they apertures in the standards 6 and 7, while the aperture 15 is located directly above the aperture 14 and has its walls at an incline to the walls of the -aperture 14 to accommodate the inclination of the shaft 16, .jo'urnaled in the'standard or support 7 at a slight incline, and may be retained in its position by collars 17, secured to the shaft at either side of the standard. For operating the same it has mounted on its outer end a suitable hand-wheel 18 and carries on its inner end, within thebracket 12, a bevelgear 1.9, which isadapted to mesh with the gear orcog 20, that is loosely mounted upon the squared portion of the operating-rod that is IOO within said keeper orbracket 12. Therounded stem 9 of this operating-rod has mounted thereon, adjacent tothe closed end of thebarrel 8,.asleeve 21, havinglugs 22 on its under side, to which is pivotally connected the upper endof thelink 23, the other end of said link being similarly connected to the upper end of a bell-crank level` 24, that is supported from any suitable point in close proximity to the engine. The other arm of this bell-crank is pivotal'lyconnected to a link 26', having its other end pivotally attached to a cross-head 27', carried by thelink 25, which is slotted to receive either a pin 25', secured on the outer end of the stem 2G of the valve, which admits and exhausts steam to .each end of the cylinder and extending at right angles to said stem, or this sternA may have its outer or free end bentat right angles to engage in the slot of said link. This link is connected by therods 27 to the eccentric of the engine.

The collar orsleeve 21 is held in position upon therounded portion 9 of the operatingvrodbymeans of acollar 28, havingasetscrew 29 to engage said stem and hold the collar orsleeve 21 in its position. ing in the 'barrel portion 8 of this operatingrod is oblong in cross-section of the barrel and is adapted to receive theflat bar 30, havingpivotally connectedto its outer end by a pin orrivet 31 thestem 32 of asocket 33, which receives the stem 5 of the throttlevalve and is secured thereto by a set-screw 34.

The opening and closing of the throttlevalve 4 is controlled by rotating the operatin g-rod,which may be accomplished by means ofthe shaft 16 and hand-Wheel 18 or when the handle ll is rigidly mounted on the rod l0 by turning thishandle 11. prefer to rotatably mount this handle l1 on its rod, so the handle may be turned thereon toany convenient position, and as it would not be possible to rotate the rod l0-when this handle was so mounted I prefer to use the shaft 16, hand-Wheel 18, bevel-gear 19, and cog 20 for imparting this rotary movement to the rod l() to open or close the valve 4. When it is desired to open or close the valve which admits and exhausts the steam to each end ofthe cylinder, alongitndiual movement is imparted to the rod 1,0 by itshandle 11 and thelink 28, bell-crank 24, andlink 25 thereby actuated to operate such valve to open or close the same according to the direction in which therod 10 has been moved.

The open-- However, IA

It will be observed that various changes may be made in the details of construction Without departing from the general spirit of my invention.

Having fully described myinvention, what I claim as new, and desire to secure by Letters Patent, is n l. In a valve-gear, the combination, with the steam-chest and its throttle-valve, of au operating-rod connected to the stein oi' the throttle-valve, connections between said rod and the valve whichadinits and exhausts steam to each end of the cylinder, a cog-wheel 'mounted on said operating-rod, and, an operating-shaft having a bevel-gear to engage said cog on the operating-rod and impart a rotary movement thereto when the shaft is rotated,

substantially as described.

Y 2. In a valve-gear, the combination with the steam-chest and its throttle-valve, and the cylinder and its valve for admitting and exhausting steam to each end'thereof; of a lon gitudinally-reciproeatin g and rotary-movable operating-rod connected to the stem of the throttle-valve and adapted to operate said valve by its rotary movement, connections between said operating-rod and the stem of the valve which admits aud exhausts steam to each end'of the cylinder, and means connected to said operating-rod for 'rotating the same, and separate means carried by the rod for longitudinally operating the same, substanti-ally as described.'

3. In a valve-gear, the combination, with Vthe steam-chest `and its throttle-valve, and

the cylinder and its valve for admitting and exhausting steam to each end thereof; of a longitudinally-reciprocati ng and rotary-mov- 'able operating-rod connected to the stem ot the 'throttle-valve and adapted to operate said valve .by its rotary movement, a bellcrankand link connection between said operating-rod and the stem of the valve which admits and exhausts steam to-each end of the cylinder, means engaging said operatingrod for imparting a rotary movement thereto, and means carried by said operating-rod for longitudinally operating the same, as and for the purpose described.

In testimon37 whereof I ax nlysignatnre in the presence of two witnesses.

LESLIE STEELE.

iWitnesses:

i G. W. OHITTIs, J. A. LANE.

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