US976839A - Governing apparatus. - Google Patents

Description

the valve 2.

UNITED sTATnsp/rngfnnr oFFiLc-n.

HENRY L. BARTON, OF PITTSBUG, PENNSYLVANIA. ASSIGNOR-TO THE WESTING-- HOUSE MACHINE COMPANY, A CORPORATION OF PENNSYLVANIA.'

- GVERNING APPARATUS.

Specification of Letters Patent.

Patented Nov. 29, 1910.

pplication filed September 1, 1909. Serial No. 515,579.

'l'o o/l whom it muy concern.'

Be it known that l, ljlnNnr L. BMrrON, a citizen, ot the United States, and a resident ot littsburg, in the county of Allegheny and State of Pennsylvania, have m'vade a new and uset'ul Invention in Governing Apparatus, ot which the following is a specitication.

This invention relates to means for controlling the adi'nission ot motive fluid to a motor and particularly steam to a turbine.

One of the objects of the invention is to provide means whereby the admission valve will be controlled by thev governor or speed reA `)onsive device to throttle the steam entering` the turbine in accordance with the load, and to provide means whereby, when the motor exceeds a determined speed, the motive fluid will be entirely cut Gti'.

By an arrangement made in accordance with my invention, I am enabled to operate the admission valve as a throttle valve or a sa'let y stop valve dependentI upon the speed. ot the motor.

In the drawings: the figure 'illustrates a view partly in section and partly in elevation ot' a mechanism constructed in accord ance with my invention.

lteterril'ig now tothe drawings by numer4 als ot' reference: 1 designates a motor, as tor example, a turbine, having a doubledwat admission valve 2 of usual construction, said valve being provided with a stem L. Secured to the stem 3 is a collar .l which may be adjustably secured on said stem and against which one end ot a spring 5 bears. lhe other end oit? the spring bears against the spring seat 6 carried by the turbine. 'l`he springl 5 is an expansion spring and the normal tendency thereof will be to unseat '.lhe valve will be controlled, however, under normal working` conditions by a `governor or speed responsive device of which 7 designates the stem. The stem 7 may bear against one end ot a lever S fulcrumed at t). lhe other end of the lever 8 bears against the other end ot the valve stem C). '.l`hus` as the governin weights 'move out, the stem 7 is raised so as to depress the end l() otl the lever 'S and tend to close the valve against; the action ot the sprii'ig 5. When the speed ot the motor drops, the expansive torce, of' the spring 5 will tend to open the valve, which it will be permitted to do he canse the ystem 7 otl they governor will be lnoved away 'l'rom the lever 8.

Surrounding the stein 3 but not connected to it is a collar 11 which forms a seat Afor a springli, one end et' which bears against the collar 11 and the other end of which bears against a suitably supported bracket 13. The collar 11 is Apriivided with a pin or projection 14 engaging an elongated slot l5 in the lever 16. The lever lt is pivoted at li' to the bracket 13 and as the collar 11 is free to slide with respect to the stem 3, the lever 16 may be raised by the handle 18 so as to compress the spring 1i). andthe spring willl be held in this compressed position by a latch lt) which may engage the end 2O of the lever 1G. The latch 19 is provided with a depending arm V21 which ma y lie l. adjacenta centri tugally actuated release bolt 22 carried by the motor so that when the speed otl the motor becomes excessive, the

-bolt 22 will be thrown out by centrifugal force so as'to con-tact. with the depending arm Q1 and release the-lat'ch'lt) from engagement with the end ot' the leverql. i

ln view ot the t'aet that the-spring 12 is stronger than the spring 5, the said spring the collar ll into contact`with the collar 4 and 'causing the sprii'ig 5 to be'I contracted when the latch ttl releases the end Z0 of the lever lt and the valve will be seated. When it is desirable to again sta'rtiup the motor it will only be necessary to raise the handle 18 of the. lever 1G and engage the end 20 of the lever 1G with `the latclrlt), in which event the valve 2 will throttle, according to the speed of the motor, up to a. determined limit. If that limit is exceeded, however, 4the cenvtrifugally actuated. bolti will release the latch" 19 and cause a recurrence et the cutting ot',fea.tu1'e. YVhenever the speed of the motor is belowv the maximum` the valve 2 will operate only as a throttle valve, the spring vl2 operating only under overspeed. i

ln accordance with the provisions of the patent statutes, lhavedeseribed the principle et' operation oit my invention, together with the apparatus which l now consider to represent'the best embodiment thereof, but, I desire` to haveit understood that the apparatus shown is only illustrative and that the invention can becarried out by othel` means.

What l claim is: Y

l. '.lhe combination with a motor and its 80 'l2 will overcoine the spring 5 by bringing Sprlng in an inoperative position and trip mechanism for releasing said spring.

3. The combination with the supply valve [of a motor, an expansion'spring tending to unseat lsaid valve, a' lever, a speed responsive device to aotuate said lever to impart a closing movement-to the valve, a spring op-v posed to and stronger than the firstmentioned spring and means responsive to speed .to release said second mentioned spring.

, 4. The combination with the supply valve -of a motor, an adjnstable collar on the. stem of said valve, an expansion spring bearing against'said collar, a lever movable to exert pressure/op osed to 4 said spring, a. speed responsive evice lto actuate sa1dlever5. a collar loose on the stem, a spring opposed to releasiiw said s rin tothe first mentioned lSpring and bearing against said last mentioned collar, means for normally holding said last mentioned spring inactive and means for releasing it. y.

5., The combination with the supply valve of a motor, athrottle mechanism for the valve comprising a sprin and a speed responsive device actuated ever and a1 valve seating mechanism comprising a springA stronger than and oppose to Ythe first nientioned spring and means for holding said' last mentioned spring out of operation.

o. The combination with a motor and its i supply .valve provided with a stem, s eed responsive means operatively connecte to said stem land including a spring tending to Ayieldingly hold said valve open, i a4 spring surrounding said stem, which, when extended Will close said valve, means for holding said latter spring in an inoperative position and trip mechanism ifor rendering said latter spring operative. i

In testimony whereof, I' have hereunto subscribed my name this 30th day of August, 1909. 1'

HENRY L. BAR'roN.

Witnesses:

dw. Medan, Gro. A. WALKER.

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