US663829A - Throttle-valve for steam-engines. - Google Patents

Description

No. 663,829. Patented Dc. Il, |900.l

J. F. DURYEA.l THRUTTLE VALVE FOB STEAM ENG|NES- (Application led Mar. 7, 1900.)

(Nu Model.) 2 Sheets-Sheet l.

No. 663,829. Patented nec. |900. .1. F. nunvEA.

THROTTLE VALVE FOR STEAM ENGINES.

(Application led Mar. 7, 1900.) (No Model.)

2 Sheets-Sheet 2.

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JAMES FRANK DURYEA, OF SPRINGFIELD, MASSACHUSETTS, ASSIGNOR TO THE UNITED POWER VEHICLE COMPANY, OE NEW YORK, N. Y..

THROTTLEVALVE FOR STEAM-ENGINES.

,SPECIFICATION forming` part of Letters Patent No. 663,829, dated December 11, 1900. Application filed March 7, 1900. Serial No. 7,662. (No model.)

1b all whom, t may concern.-

Be it known that I, JAMES FRANK DURYEA, a citizen of the United States of America, and a resident of Springfield, in the county of Hampden and State of Massachusetts, have invented certain new and useful Improvements in Throttle-Valves for Steam-Engines, of which the followingis a full, clear, and exact description.

1o This invention relates to improvements in the controlling appliances which are manually operated for steam-engines.

The improved devices are more especially designed for utilization on steam engines t5 which are employed for the propulsion of motor-vehicles or automobiles.

The invention in part relates to improved mechanism for operating the throttle-valve to open and to close the same as desired.

2o The invention also embodies,in conjunction with the throttle-valve and with a chamber or conduit adjacent the throttle valve which leads from the steam-supply pipe to the steamchest of the engine, a secondary or relief z 5 valve opening to the escape of any steam which may leak past the th rottle-valve when the latter is closed, whereby at the time the engine and vehicle is stopped and the reliefvalve opened there can be no passage of steam 3o under pressure into the engine to cause any unexpected starting of the engine and movement of the carriage from the place at which it was left to become endangered or to endanger traffic.

The invention also embodies,in conjunction with the throttle-valve-operating devices, operating means for the relief-valve, so that when the throttle-valve is by a movement of its operating connection brought to its closed 4o position a still further movement of the same devicel which effects the closing of the throttle-valve will'insure the opening of the reliefvalve.

The invention also embodies the combination,with the throttle-valve-actuating means, of the lever which is adapted for a swinging motion for effecting through suitable connections the shifting of the link-motion which controls the cut-od and reversal of the en- 5o gine and thedog or catch which restrains the cut-off-controiling lever in any of its given set positions, so that a proper movement of the rod or part forming one of the connections in the throttle-valve-operating device may without affecting the throttle-valve insure the release of the dog for its disengagement to permit said controlling-lever for the cut-olf to have its appropriate swinging movement as desired.

The invention furthermore consists in de- 6o tails of arrangement and particular combinations and constructions of parts, all substantially as hereinafter fully described, and set forth in the claims. l

Reference is to be had tothe accompanying drawings, in Which- Figure l is a plan view of a portion of a motor-vehicle, indicating the engine and its boiler therewith connected and showing the improved manually-operated controlling de- 7o vices which have been above mentioned. Fig. 2 is a side elevation of the sam-e. Fig,

3 is a plan View, on a larger scale, more especially of the improved devices. Fig. 4c is an elevation of the same part shown in Fig. 2, but on a larger scale; and Fig. 5 is an elevation as taken at right angles to Fig. 1.

In the drawings, A represents a steam-engine of an ordinary type, to the steam-chest ot' which the pipe B conveys steam from the 8o boiler C.

The engine and boiler in Figs. l and 2 are shown as mounted upon the body D of a motor-wagon.

E represents the usual link-motion for varying the cut-off and for stopping and reversing the engine, operating in the manner which is very common and well known.

c represents the throttle-valve, which closes against the valve-seat a2 in the chambered 9o casting or coupling-section E, which is ben tween the steam-pipe sections lO and l2. The said casting or coupling section F, which constitutes in substance an enlargement in the conduit for carrying the steam from the boiler tothe engine, has the extension boss and gland 13 opposite the aforesaid valve-seat through which the stem d of the throttle-valve plays. The said chambered casting F also has a valveseat opening @,connected with which is an out- Ico let-passage e, and provided to the valve-seat openingis the relie-valvef, opening inwardly and having the stem f2, which extends parallel with the throttle-valve stem, its location being comparatively near that of said throttle- Valve stem.

The throttle-valve stem has at an intermediate part of the portion thereof between the gland 13 and its outer end shoulder 14 the shoulder or abutment l5, outside of which engages the apertured end 16 of an elbow-lever g, which is pivotally mounted in the stationary bracket or fixture 17, secured on the body of the vehicle.

With the arm of the lever g which is angular to the arm or extremity 16 thereof which embraces the throttle-valve stem, is connect-k ed the connecting-rod or thrust-rod h, which ranges horizontally at about right angles to the lengths of the parallel stems of the throttle and relief valves. 'A portion of the length of the thrust-rod his extended through and inclosed within the tubular rock-shaft m, which is mounted for rotational rocking movement in the brackets or iixtures 18 18 therefor, secured to the body of the vehicle. The end of the said rod h which is the farther from the angular lever g has connection with the horizontal crank member i, which is provided and affixed to the lower end of the upstanding operating shaft rod or bar j, which is extended upwardly through and within the hollow lever G, which latter is the operating-lever for manually controlling the position of the cut-off link-motion E, it being here explained that the lower end portion of this swinging lever G is affixed as a vertical angular extension thereof to the end portion of the tubular rock-shaft m, which has its location beyond or outside of the journal sleeve or bushing 19, and that the opposite end of the tubularrock-shaft m,which is shown as between the swinging lever G and the aforementioned angular lever g, has the cranked extension or lever-arm h, between which and the link-niotion E is the link or connecting-rod b2.

The upper end of the swinging lever G is constructed with an arc-shaped or circular Hange 20, which has therein notches 22.

a represents the part or handle of the device, which is directly grasped and by which upon various manipulations thereof all of the devices may be operated. This horizontal handle has at its inner end the depending hub 24, within the socket of which is fitted and secured by the cross-pin 25 the upper end of the vertical rod j. The said handle n is axially bored on two diameters, through which plays the stem n2, the outer end of which is enlarged or shouldered, as seen at n3, while the opposite end has the catch-lug or dog n4, which is adapted to engage in either of the aforesaid notches 22.

h5 represents a spiral spring inclosed within the tubular handle and operating to force the Stern to the rightward as the parts are seen in Eig. 4, whereby the catch-lug or dog will engage with certainty in one of the notches 22 eeasee therefor and be retained in such engagement against accidental displacement.

As a matter of convenient design the upper end portion of the swinging lever G is formed as a complete shoe to give a bearing for the turning movement therein at the upper end portion of the rod j, while the lower portion of this lever is formed of a cross-sectional U shape, with the web at 26, in which also is a bearing-support for the lower end portion of said rod j. Said part 26 constitutes a stop for the upward drawing movement of the rodj for the purpose hereinafter explained. The lower end 27 of the tubular upper part of the lever G constitutesa stop or abutment for the upper end of the spiral spring 28.

o2 represents a sleeve-like shank ofthe dog o, which engages in the notches 30 of the sector-plate q, which is mounted on the body or framing of the vehicle in a vertical plane coincident or parallel with the plane of swinging motion of part G. The said dog is loose about the rod j, so that the turning of the rod will not turn the dog, and yet any lifting motion of the rod will insure the lifting of the dog because of the cross-pin t thereunder.

To operate the mechanism to open or close the throttle-valve,the handle-arm n is grasped by the hand, the ball or back part of the hand exerting a crowding contact against the end portion n3 of the stem, which crowds the latter endwise through the handle, carrying the catch lug n4 out of engagement with the notched flange of the swinging lever G, and now the handle may be turned in a horizontal plane to partially rotate the vertical rodand through the crank-arm i thereof and thrustrod cause the swinging of the angular leverj to either force the throttle-valve through its stem open orclosed. It will be here pointed out that the angular lever g has opposite the arm 16 the secondvlever-arm 33, having a forcing action against the stennf2 of the relief-valve. The relief-valve is shown as provided with a springf8 for normally closingit. It will alsobe pointed out that the abutment or shoulder d2 on the throttle-valve stem, against which the member 16 of the angular lever g bears, is spring-supported on the stem and is thereby yielding in a direction toward the end of the stem against the compression of the spiral spring d3, interposed between the shoulder-collar d2 and the stop l4. Now, assuming that the handle/n is being swung around horizontallyiu a direction to swing theleverg in the direction of the small arrow shown in Fig. 3, it will be understood that the part V16 after having forced the throttle-valve closed against its seat CL2 may on a continued swinging'movement of the handle n and of the lever g in the indicated direction have a lost motion relatively to the throttlevalve stem concurrent with which the opposite lever-arm 33 will force the relief-valve open, which may remain so open onl any occasions when the establishment of such condition is desired, more especially at a time IOO IIO

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when the vehicle is left standing with steam on. With the relief-valve thus left open there can be no danger of steam being permitted to enter under pressure into the steamchest of the engine, as might possibly occur in the event of the throttle-valve failing to fully close by reason of the lodgment of sediment in the valve-seat or of leakage of the valve. Ii will be perceived that a certain degree of swinging movement of the handle n in the proper direction to close the alreadyopened throttle-valve may be given to such handle without the additional movement sufficient to open the relief-valve. Now, again, by lifting the stemj through the handle n sufficiently far as to raise the dog 0 clear from the notched sector-plate the lever G is free to be swung in either direction to impart through the connection described between said lever and the link-motion E for the cutoff the changing of the'cut-off as may be desired.

The mechanism is so constructed or designed that the elevating movement of the rod j to release the dog o from the sector-plate may be comparatively slight, and this movement need not be so great as to cause the lifting of the catch-lug entirely out from whichever of the notches 22 said lug maybe in engagement with.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is-

l. In an engine, the combination with the steam-conduit having the throttle-valve, and in the portion of the steam-conduit between the throttle-valve and the engine, a reliefopening having a relief-valve normally closing the same, and means for operating it,

whereby with the relief-valve open and the throttle-valve closed, any leakage of steam past the throttle-valve will be diverted from the engine. Y

2. In an engine, the combination with the steam -conduit therefor having a throttlevalve, and having in the portion of the steamconduit between the throttle-valve and engine, a relief-opening having a relief-valve normally automatically closing said opening, operating means for the throttlevalve arranged in conjunction With the relief-valve to open the latter only after the throttle-valve has been closed, for the purpose set forth.

3. The combination with the engine and the steam-pipe thereof having the th rottle-valve d and the extended stem and said conduit having between the throttle-valve and its conneetion with the engine, the relief-opening e2 having the relief-valvefand a valve-stem therefor, a lever g, opposite arms of which are arranged to engage both the stem of the throttle valve and the stem of the reliefvalve, for the conjoint operations of both said valves, for the purpose set forth.

fi. The combination with the steam-conduit for the engine, having the valve-seat cand throttle-valve a provided with a stem cl which has the shoulder l5 and the yielding abutment d2, and which conduit has between the throttle-valve in its connection withthe engine the relief-opening e2 to which is provided the relief-valve f having a valve-stem and a closing-spring, of the lever g having the eX- tensions or arms the one 16 engaging the throttle-valve stem bet-Ween said parts l5 and cl2 and the other 33 cooperating with the relief valve-stem, and means for imparting a swinging motion to said lever.

5. The com bination with the throttle-valve stem d, of an angular lever adjacent the same and adapted to have an opening and closing engagement therewith, a vertical rodj mounted for a rotational movement and provided with a handle and with the crank portion i, and the connecting-rod h secured to said part t' and the lever C, substantially as described.

6. The combination with the throttle-valve stem CZ, of an angular lever adjacent the same and adapted tohave an openingand closing engagement therewith, a vertical rodj mounted for a rotational movement and provided with a handle, and with the crank portion t', and a p art adjacent which said handle has its swinging movement provided with one or more catch-notches, a catch movably mounted on the handle to engage and disengage said notches, and the connecting-rod h secured to said part i and the lever g.

7. The combination with a throttle-valve, and with the link-motion for controlling the cut-off, of an engine, of a swing-lever connected with the link-motion, a rod bodily movable in conjunction with the swing-lever, and having 'an independent motion whereby to operate the throttle-valve.

S. In combination, the throttle-valve, and link-motion of the engine, a lever mounted for a swinging motion and connected with the-link-motion, a confining-dog for the lever, and a part with which the dog may have engagement and disengagement, a rod bodily movable in unison with the lever and having an independent movement for operating the throttle-valve; and having a movement also independent of the movement of the lever for releasing the coniining-dog for said lever to permit the latter to be swung.

9. In combination, the throttle-valve, and the link-motion for the cut-off, of the engine, of a swinging lever connected with the linkmotion, a rod mounted to have its bodily movements in unison with said lever, and having a rotational movement, and an axial movement independently of said lever, cranklever and link connections between the rod and the throttle-valve actuated by the rotational movements ofthe rod to open and close the valve, the confining-dog for the swinging lever, with which the rod, in its axial movement engages, for its release, to permit the lever to be swung.

l0. The combination with the link-motion of an engine and the tubular rock-shaft hav- IOO IIO

ing lever-and-rod connection with the link-inotion, and said shaft having the aftixcd lever G, of the thrust-rod h, for operating a valve of the engine, extending through the tubular rock-shaft, a rod mounted to be swung bodily in unison with said lever G and to turn relatively thereto, provided with an operatinghandle, and having a crank-arm connected With said thrust-ro 11. The combination with the throttle-Valveactuating means, of the lever which is adapted foraswinging motion for effecting through suitable connections, the shifting of the linkmotion which controls the cut-off and reversal ofthe engine, and the dog or catch which restrains the cut-o-controlling lever in any of its given set positions, so that a proper movement of the rod or part forming one of the connections in the throttle-valve-operating device-may Without affecting the throttlevalve, insure the release of the dog for its disengagement to permit said controlling-lever for the cut-0E to have its appropriate swinging movement as desired.

12. In combination the link-motion, and lethe lever G, and rotatably and axially movable relatively thereto, and having a crankarm connection at one end with rod h, and having an operating-handle n at its other end, said rod having a shoulder or abutment, by which, in its axial movement, the dog is engaged and released, all substantially as and for the purposes set forth.

Signed by meat Springfield, Massachusetts, this 5th day of March, 1900.

J FRANK DURYEA.

Witnesses:

WM. S. BELLoWs, M. A. CAMPBELL.

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