US1086018A - Steam-engine valve-gear. - Google Patents

Description

' W. 8; BROWN. STEAM ENGINE VALVE GEAR. APPLICATION FILED MAY 12, 1913.

Patented Feb. 3, 1914.

4 SHEETS-SHEET 1@ [NVEN I WITNESSES TOR Attorney W. s. BROWN. STEAM ENGINE VALVE GEAR. APPLICATION FILED MAY 12, 1913. v 1,Q86 ()f18 Patented Feb.3,- 1914- WITNESSES INVENTOR W. S. BROWN.

STEAM ENGINE VALVE GEAR.

APPLICATION FILED MAY 12, 1913.

@ M, Ma

7 Atlorney WITNESSES W. S. BROWN. STEAM ENGINE VALVE GEAR. APPLIOATIONI'ILED MAYIZ, 191s.

Patented Feb. 3, 1914 4; SHEETS-gHEET 4.

. INVENTOR WITNESSES UNITED sTATEs PATENT OFFICE.

WILLIAM SHERMAN BROWN, OF KNOXVILLE, TENNESSEE.

sTEAM-ENGIEE VALVE-GEAR.

Application filed May 12, 1913. Serial No. 767,052.

. Specification of Letters Batent.

Patented Feb. 3,1914.

To all whom it may concern Be it known that I,WILLIAM SHERMAN gine Valve-Gears, of which the following is a specification, reference being had to the accompanying drawing.

My improvement relates particularl to mechanism for transmitting motion rom the crank of a drive Wheel of a steam locomotive to the distributing valve which admits steam tothe cylinder.

The object of the im rovement is to provide a construction which is simple, has the parts accessibly located, and avoids irregularity of valve action due to lost motion or pounding at the crank.

This improvement is a modification of the mechanism described by my United States Patent No. 1,033,532, granted July 23, 1912, for steam-engine valve-wan.

In the accompanying drawings, Figure 1 is a side elevation, portions being broken away, showing myimprovement applied to one side of a locomotive; Fig. 2 is a plan of a portion of the mechanism shown by Fig. '1; Fig. 3 is a section on the line, 3+3, of Fig. 2, looking toward the right; Fig. 4 is a section on the line, 4-4:,of Fig. 2, looking in the direction of the arrow; Fig- 5 is a plan of a bridge on which a rocking member is supported; Fig. dis a side elevation of said bridge; Fig. 7 is a section on the line, 7-7, of Fig. 1, looking toward the left; Fig.

8 is an elevation of a combined bearing and standard; Fig. 9 is a side elevation similar to Fig. 1, illustrating a modification; Fig. 10 is a section on the line, 10-10, of Fig. 9, looking toward the left; Figs. 11 and 12 illustrate another modification; Figs. 13 and 14 illustrate another modification.

Referring to said drawings, 1, is the usual valve stem extending to the distributing valve (not shown). The usual horizon-.

A bridge B, is located above the'fram'e, A, and extends from the ordinary guideyoke, 8, and guide-yoke extension, 3, to the cross beam or plate, 10, and is secured to said guide-yoke and to said cross-beam by means of bolts, 9. Said bridge is in the form of a plate having its length horizontal and being turned to bring its long edges into an upright plane. At its rear end, the bridge has a lateral extension, 11,.resting against the cross-beam, 10, and receiving said bolts, 9. At its forward end the bridge has a transverse extension, 12, reaching to both sides of the body of the bridge and resting against the guide yoke, 8, and the guide yoke extension, 3, and receiving said bolts, 9. The innermost ofsaid bolts extends through the transverse extension, 12,

and the guide yoke, 8, while the others of said bolts extend through the transverse extension, 12, and through the guide yoke, 8,

and the guide yoke extension, 3. On the outer ortion ofthe transverse extension, 12,- ant integral therewith is an ear,f13,

which is directed rearward,'and on the inner portion of said transverse extension is another ear, 14, also directed rearward and located horizontally opposite the car, 13. Each of said ears has a bearing, 15, re ceivim the ends of a shaft, 16.. On said shaft s a bell crank or rocking member, F, preferably rotatable on said shaft, the latter being held immovably in its bearings. Said bell crank has two approximately horizontal arms, 17, and a depending arm, 18. The

latter arm is coupled to the valve-"stem, 1.

By rocking the bell crank, the valve stem is reciprocated.

-An approximately upright link, 19, has

its upper end coupled to the arms 17, ofthe bell crank, while its lower end is coupled to the forward end oftlie auxiliary .pitman rod, 7, both ends of said link being forked to receive said rod' and'said arms, as shown in the drawings. Said arms', 17, are also forked to receive the upper ends of the link, 19. Rearward of the said bell crank the bridge has a. lateral extension, 0. On this portion of the bridge is seated a bearing box, E, secured to the bridge by bolts, 20. Said box receives a short rockshaft, 21, which is horizontal and transverseto the frame. On the outer end of said shaft, 21, is a rocking-arm, 22, directed upward and having at its upper end a horizontal wrist,-

are lever, 24, has a transverse bearing, 25, between its ends, and the wrist, 23, extends through said bearing for supporting said lever. The upper section of, the bearing 110x, E, has an upward extension forming a standard, 26, in the upper end of which is an upright slot, 27, extending through said standard from the outer to the inner side thereof. In said slot, is a slideblock, 28. A bolt, 29, extends through the upper end of the arc lever, 24, and through said slideblock, it being loose for rotation in said lever or said block, whereby the upper end of said lever is heldfor u and down reciprocation and for oscillation of its lower portion on the axisof the bolt, 29. If the bolt, 29, and the slide-block, 28, were stationary duringithe oscillation of said are lever, the path traversed by the bolt, 31, in the lower end of the arc lever, would be con centric to the axis of the bolt, 29. But such path is modified by the bodily lowering of the arc lever during its movement away from the upright plane in which lies the axis of the rock-shaft, 21, as will hereinafter appear. To the lower end-of the arc lever is coupled the upper end of an approximately upright link, 30, by means of a bolt, 31, the upper end of said link being forked to receivethe lower end of the arc lever. The lower end of said link is coupled to the auxiliary pitman rod, 7 by means ofa bolt, 32, in'the upright plane in which the axis of the rock-shaft,21, lies, the location for said bolt being taken when the auxiliary crank 'is on either the upper or the lower quarter.

As above stated, duringeach oscillation, the path of the bolt, 31, is modified by the bodilydownwa-rd movement of the arc lever as it moves toward each extreme of its oscillation. This modification involves an inversion of the curve so that said pathbecomes concentric to an axis below said path. The height of said axis may be varied by varying the relative proportions of the rocking arm,

22, the are lever, 24, and the link, 30. For best results, said axis is to be made coincident with the lower axis of the link, 30, (which is the axis of the bolt, 32), when the lower end of said link is at the middle of its path of oscillation, which middle is, as above stated, in the upright plane in which the axis of the rock shaft, 21, lies.

'The forward end of an auxiliary reach rod, 33, is coupled to the arc lever, 24, by

- means of the bolt, 31, said rod lying beside the lower end of the arc lever within the fork of the link, 30. The rear end of said auxiliary reach rod is coupled to the upright arm, 34, which is rigid on the rockshaft, 35, which shaft is supported in bearings, 36. 011 said rock-shaft is anarm, 37, to which is coupled a rod, 38,which is in turn coupled. to the ordinary reversing lever, working on a sector or quadrant, 40.

21, in Fig. 7.

In operation, the arc lever is set to bring its lower end into any desired position in its curved path, this being done by means of the reversing lever; and while said are lever is so set, the link, 30, oscillates on thelower end of said arc lever 31,) during each reciprocation of the auxiliary pitman rod, the axis. of the bolt, 32, moving in an arc inwhich lies the axis to which the ath of the lower end of the arc lever, or of the bolt, 31, is concentric. And,

I as above indicated, the distance between the wrist of the auxiliary crank, 6, and the bolt, 32, is such as to bring the axis of said bolt into the axis of the arc path of the lower end of the arc lever when said crank is on the upper or the lower quarter at which time the main crank is on either the front 'or (on the axis of the bolt,

the rear quarter. In Fig. 1, it is shown on I the front quarter, the auxiliary crank being on the top quarter. Durin each such 're-' ciprocation, said auxiliary pitman rod rocks bodily with the axis of the bolt, 32, as a -fulcrum. This involves the "rising and fallingv of the forward end of said auxiliary rod, and during such movement 'of. said end of said rod, the link, 17, is forced up and down, and such movement of said link causes the rocking of the bell crank, F, and the reciprotion of the valve stem, 1.

The gear is reversed by throwing the reversing lever across the center in the usual manner, and the opening of thevalve is variedby moving the lower end of thearc lever nearer to and farther from the plane in which the axis of the rock shaft," 21, lies, this being accomplishedby the aid of suitable notches (not shown) on the reversing lever sector. When the lower end of the arc lever is on the middle of its path (or in said upright plane), the valve motion is -re- 'duced to the extent of the lead.

In the formillustrated by Figs. 9 and 10, the rock-shaft, 35, bearings, 35, arm 34, and auxiliaryreach rod, 33, are omitted, and a longer rock-shaft, 41, is substituted'for the rock-shaft, 21, ofFig. 7, andthe reach arm,

42., corresponding to the arm,37, on the rockshaft, 35, is'placed on the shaft, 41, and its upper end coupled to'the forward end of the reachrod, 38. The rocking arm,- 22, is

placed upon the outer end .of the shaft,- 41, the same as said arm is placed on the shaft,

Figs. 11 and 12 illustrate a form which is in part an inversion of the forms already described. The rock-shaft, 21, is present as in Fig. 7 and on saidshaft is the rocking arm, 22, of Fig. 7, but it is turned downward. A standard, 44, is fastened to the frame, A, below the shaft, 21, and the arm. 43, and has an upright slot,45, in which is a slide-block, 46. An arc lever, 47, corresponds to the arc lever, 24*, of the pr -ding, forms but it is inverted. It has a w ring,

' inches. T

crank along the auxiliary pitman rod, 7, to

. inches.

48, corresponding to the bearing, 25, of the lever 24. At its lower end a bolt, 49, extends through the lower end of said lever and through the slide-block, 46, said bolt being loose to permit the upper portion of said are lever to oscillate with said bolt for an axis. The upper end of said are lever is coupled to the upper end of the link, 30, by means of a bolt,50, in an arc having a radius equal to the length of the lever, 47. But whilethe upper end of the arc lever moves away from its middle position it is carried bodily upward by the rocking arm, 43, whereby there is formed an arc, the radius of which is longer than the arc lever, 47, as

long as the link, 30, it the parts are suitably proportioned. The forward end of the auxiliary reach rod, 33, (shown in Fig. 1) is coupled to the upper end of the arc lever, 47, said reach rod being placed between the link, 30, and the lever, 47, and the bolt, 50, ex-

tendin through said reach rod as well as throng said lever and link.

In Figs. 13 and 14, the auxiliary reach rod is omitted, the rock-shaft, 21, is extended to become the rock-shaft, 41, of Fig. 9, and on said shaft is an arm, 42, to the upper end 'of which is coupled directly to th reach rod, 38, as shown in Fig. 9. n

The drawings have been copied, in part, from larger working drawings used in applying my improvement to a railway freight locomotive having a piston stroke of 30 inches and having a maximum valve. travel of 5% inches and a lead of three sixteenths of an inch. The radius of the auxiliary crank, 6, (measurin from the driver axis) is 8 and lie distance from the auxiliary the axis of the bolt, 32, is 74 and inches. From the latter point on said pitman rod to the link, 17, is 10 and inches. The length of the link, 30, is 35 and inches, and that, as already described, is also the radius of .the curved path of the bolt, 31, which carries the upper end of the link, 30; and the center-of said curved path coincides with the axis of the bolt, 33, whenthe auxiliary crank is on the upper quarter or the lower quarter, at which time said bolt is one and fivesixteenth inches below the level of the driver axis and the cylinder axis (the working line or center line of motion The length of the link, 17, is 32 inches. The height of the axis or fulcrum of the bell crank' of rocking member, C, above the level of the center line of motion is 32 and The length of the arms, 15 and 16, of the bell crank is 12 and inches. The rocking member, C, as used on said engine, is not a true bell crank, its angle being less than ninety degrees-72 degrees.

When the engine is in forward motion and the main crank is on the back center and the auxiliary crank on the upper quarter, the

arm, 15, is 2 and 1} degrees back of a vertical line cutting the fulcrum, and the arc, 15, is 15 and degrees below 'a.horizontal line cutting the fulcrum. -VVhen the arc lever is set for full valve travel (5 and inches), the forward travel of the arm. 16, from tlie position mentioned is 7 and degrees and the back travel of said arm from said )osition of 19 degrees, and the arm, 15. trave downward and upward correspondingly. Thus the larger portion of the traycl of the rocking member arms is within the 90 degree angle formed by said vertical and. said horizontal lines. These relative proportions and positions ofthe various parts of the mechanism produce the desired quick movement of the valve during the opening and closing and also produce equalized travel of the valve over the port during the forward motion and during the backward motion.

It is to be observed that my improvement eliminates from the valve mechanism the eccentric and also all parts having a. high Velocity. No part of the valve mechanism is ,connected to the connecting rod nor the cross-head. Movement is transmitted to the valve stem from the wrist of the auxiliary crank'and said wrist travels in a relatively small circle. Thus the movement of the auxiliary rod and the links, 17 and 30, are through relatively short ranges. Furthermore, it is to be noted that lost motion due to wear at the wrist of the auxiliary crank will chiefly modify the lengthwise movement of the auxiliary pitman, 7, while the movement transmitted through the link, 17, is ap-v proximately at right angles to said auxiliarypitman. -Hence thev modification of the longitudinal movement of said pitman is substantially not transmitted to said link. And it will be seen that such modification of the rocking movement of the auxiliary pitman due to wear at the wrist of the auxiliary crank will afi'ect the link, 17, in minimized form, because the-portion of the auxiliary pitman between the axis, 32, and the link, 17 is much less than between said axis and the wrist of the auxiliary crank. In this connection it is to be remembered that wear by the auxiliary crank wrist in the auxiliary pitman is chiefly in the direction of the length of said pitman. Such wear produces what is termed lostmotion or pounding at the crank.

I claim as my invention: 1. In a steam engine valve'gear, the combination of a rocking member, means for rocking said rocking member, an upright, reciprocatory'arc lever coupled between its ends to the outer end of said rocking membcr, means for-guiding one end of said are tion, an auxiliary crank, an auxiliary rod coupled to said crank, and tw approximately upright links, each having its lower lever for approximately upright recipro-caand one having its unper. end coupled. to the oscillatory end of he lever and the other .having upper end in operative relation with the distributing valve stem, substantially as described.

2. In a steam engine valve gear, the combination of a rocking member, means for rocking said rocking inei'nber, an upright, reciprocatory arc lever coupled between its ends to the outer end of said rocking mem ber, means forming an upright slideway connection for one end of said are lever, an auxiliary crank, auxiliary rod coupled to said crank, and two approximately up right links, each having its lower end coupled to the auxiliary rod and one having its end coupled to theauxiliary rod upper end coupled to the oscillatory end of the arc lever and the other having its upper end in operative relation with the distribut ing valve stem, substantially as described. In a steam engine valve gear, the combination of a rocking member, an upright, reciprocatory are lever coupled between its ends to the outer end of said rocking incur ber, means for guiding one end of said are lever for approximately upright reciprocation, an auxiliary crank, an auxiliary rod coupled to said c ank, and two approximately upright links, each. having its lower end coupled to the auxiliary rod and the rear Off said links havin its )er end 0011- ID A pied. to the oscillatory end o, be are lever and the other link having its upper end in operative relation with the distributing valve stem, substantially as described.

l. In a steam engine valve gear, the combination of rocking member, means for rocking said rocking niembc", an upright, reciprocatory arc lever coupled between its ends to the outer end of said rocking member, means forming an upright slide way connection for one end of said are lever, an

' auxiliary crank, an auxiliary rod coupled to said crank, and two approximately up right links, each having its lower end coupled. to the auxiliary rod and the rear of said links having its upper end coupled to the oscillatory end of the arc lever and the other link having its upper end in operative relation with the distribluiing valve stem, substantially (ilescribed.

in a steam engine valve gear, the coinbinalion of a rocking member, means for rocking said rocking n'ieiuber, an upright, rcciprocutory arc lever coup] ends to the outer end of said rock ng mou n be). a fixed stundaiwl in operative relal'ioi'i with one end of said are lever for limiting said end to upright inorei'uel'it,

a n auxiliary crank, an auxiliary rod coupled to said crank, and t aoproximatcly u 'iright links, each havir lower coupled to the auxiliary Y its upper end coupled of, are are leed between its lever and the other weenie ver and the other having its upper end in operative relation with the distributing valve stem, substantially as described.

8. In a steam. engine valve gear, the combination of a rocking member, means for rocking said rocking member, an upright, reciprocatory are have coupled between its ends to the outer end of said rocking member, a fixed standard in operative rclati n with one end of said are lever for limiting said end to upright movement, an auxiliary crank, an auxiliary rod coupled to said crank, and two approximatelyupright links, each having its lower end coupled to the auxiliary rod and one having its upper end coupled to theoscillatory end of the are having its upper end in operative relation with the distributing valve stem, substantially as described.

' 7. In a steam engine valve gear, the conibination of a rocking member, an upright reciprocatory arc lever coupled between its ends through the outer end of said rocking member, a fixed Tstandard in operative relation with one end. of said are lever for limitiug said end. to upright movement, an auxiliary crank, an auxiliary rod coupled to said crank, and two approximately upright links, each having its lower end coupled to the auxiliary rod and. the rear of said links having its upper end coupled to the oscillatory end of the arc lever and the other link having its upper end in operative relation with the distributing valve stein, substantially as described.

I 8. In a steam engine valve gear, the'combination of a rocking member, means for rocking said rockingn1e1nber,an upright, reciprocatoryarc lever coupled betwcen its ends to the outer end of said rocking member, a fixed standard in operative relation with one end or" said are lever for limiting said ends to upright movement, an auxiliary crank, an auxiliary rod coupled to said crank, and two approximately upright links, its lower end coupled to the auxiliary rod and the rear of said. links having its upper end coupled to the oscillatory end of the are lever and the other link having its upper end in operative relation ing valve stem, substantially as described.

9. In a steam engine valve gear, the combination of a bearin'g box, standard intcgral with said box, a rocking member in said box, means for rocking member, an upright, reciprocatory arc le vcr coupled between its ends 'to' the outer end of said rocking member, means for corn necting' one end of said arc lever in operative relation with said st mately upright reciprocation, an auxiliary crank, an auxiliary rod coupled to said crank, and'two approximately upright links, each having its lower end coupled to the auxiliary each having with the distribuo 1 said rocking andard for approxi 10. In a steam engine valve gear, the combination of a bearing box, a standard integral with said box, a rockingmember in said box, means for rocking said rocking member, an upright, reciprocator'y arclever 'c'ou led between its ends to the outer end of s'ai rockin member, means 'connectiiig one end of sai arc lever in operative relation with said standard for approximately upright reciprocation', an auxiliary crank, an auxiliary rod coupled to said crank, and two approximately upright links, each having its lower end coupled to the auxiliary rod and the rearof said links having its upper end coupled lever and the other link having" its upper end in operative relation with the distributing valve stem, substantially as described.

a 11. In a steam engine valve gear, the combination of a bearing box, a standa'd integral with said box, a rocking iiiem' r in said box, means for rocking said rocking member, an upright, reciprocatory arc lever 0011' led between its ends to the outer eiid' of sai rocking member, means for connecting one end of said are lever in operative relation with said standard for approximately upright reciprocation, an auxiliary crank,

anauxiliary rod coupled to said crank, and two approximately upright links, each havin its lower end coupled to the auxiliary 1'0 and one having'its upper end coupled tothe oscillatory end of the are lever and the other having itsupper end in operative relation with the distributing valve stem, substantially as described. 12. In a steam engine valve gear, the combination of a bearing box, a standard integral with said box, a rocking member in said box, means for rocking said rocking member, an upright, reciprocatory arc lever coupled between its ends to the outer end of said rocking member, means for connecting one end of said are lever in operative relation with said standard for approximately upright reciprocation, an auxiliary crank, an auxiliary rod coupled to said crank, and two approximately upright links, eachhaving its lower end coupled to the auxiliary rod and the rear of said links hav ing its upper end cou led to the oscillatory end of the arc lever and the other link having its upper end in operative relationwith the distributing valve stem, substantially as described.

18. In a steam engine valve gear, the combination of a rocking member,'means for rockin g said rocking member, an upright, reciprocatory arc lever coupled between ends to the outer end of said rocking member, means for guiding one end of said are lever for apto the oscillatoryend of the arc to said crank, two approxima bination of a rocking m pper, eats rocking said rocking mem couple roximately upright reciprocation, an an ilia crank, an auxi iary rod coupled tofsaid cran two approximately upright liiiks, each having its lower end coupled tothe auxiliary rod and one having its up er end coupled to the oscillatory end of the arc lever, 'nd a bell crank coupled to the upper end a the other of said links and connected in operative relation with the distributing valve stem, substantially as'described.

14 ii a steam engine valve gear, the combiiiation Ora rocking member, means for rocking said rocking member, an upright, re'cipro'cato'ryv are lever coup ed between its ends to the oiit'e'r end of said rockihig member, means forming an upright s ideway connection for one end of. said a'rc, leveaan auxiliary crank, an auxiliary rod coupled 1y upri'ht links, each having its lower en coii'pl' .to the auxiliary rod and one havin iipper end coupled tattle o's'cillato info the are ever, and a bell crank cou e t end of the other of said links and connec ed in operative relation with thedistributiiig valve 'stem, substantially as described. 15, la a steam engine valve gear, the co bihation of a rocking member an uprig t, reciprocatory arc lever coupled between its ends to the uter end 0 said rocking member, means for guiding one end otsaid are lever for approximately upright reciprocation, an auxiliary crank, an auxiliary rod coupled to sin crank, two approximately upright links, each havih it lower end coupled to the auxiliar. ro an one having it upper end coupl' d o the oscillate oi the arc lever, an, a bell c ank co up e to the upper end of the other 0 said 'd connected in tributing valve stem, su sta'iit-ially as escribed. j I 16. Ina steam engine valve gear, the coinor a p ge reciprocatory' are lever coupled etween it's ends to the outer end of said roe tip member, means forming an upright s id way connection for one en of said ac iey r, auxiliary cran an auxiliary ro cougdqe said crank, two approximately uprigh liii "'s, each havingits lower en" coupledto te auxiliary' rod and one havlng its ear end d to %h oscillatory end 6 the are lever, an a )e l crank coupled to the up er end of the other of said link and comet ed in operative relation with t e distributing valve stem, substantially as described.

17. In a steam engine valve gear, the conibination of a rocking member, means for rocking said rocking member, an upright, reciprocatory arc lever coupled between its ends to the outer end of said rocking mem-- her, a fixed standard in operative relation with one end of sai are lever for limiting o the upper operativereltion the ssaid end to upright movement, an auxiliary crank, an auxiliary. rod coupled to said crank, two approximately upri ht links, each having its upper endcoupid'to the oscillatory end of the arc lever, and a bell crank coupled to the upper end of the other of said links and connected in operative relation with the distributing valve stem, substantially as described. a

18. In a steam engine Valve gear, the combination of a rocking member, means for rocking said rocking member, an upright, reeiprocatory arc lever coupled between its ends to the outer end of said rocking memher, a fixed standard inoperative relation with one end of said are lever for limiting said end to upright movement, an auxiliary crank, an auxiliary rod coupled to said crank, two approximately upright links, each having its lower end coupled to the auxiliary rod and one havingvi'ts upper end coupled to the oscillatory end of the arc lever,

and a bell crank coupled to the upper end of the other of said links and connected in operative relation with the distributing valve stem,-substantially as described.

19. In a steam engine valve gear, the combination of a rocking member,- an upright,

reciprocatory are lever coupled between its ends to the outer end of said rocking member, a fixed standard in operative relation with oneend of said are lever for limiting said end to upright movement, an. auxiliary crank, an auxiliary rod coupled to said crank, two approximately uprightlinks,

each'having its lower end coupled to the auxiliary rod and one having its upper end coupled to the oscillatory end of the arc lever, and a bell crank coupled to the upper end of the other of said links and connected in operative relation with the distributing valve stem, substantially as described.

20. In a steam engine valve gear, the combination of a rocking member, means for rocking said rocking member, an upright,

reclprocatory are lever coupled between its ends to the outer end of said rocking member, a fixed standard in operative relation with one end ofsaid arc lever for limiting said ends t upright movement, an auxiliary crank, an auxiliary rod coupled to said crank, two approximately upright links, each having its lower end coupled to the auxiliary rod and one having its upper end coupled to the oscillatory end of thearc lever, and a bell crank coupled to the upper end of the other of said links and connected in operative relation with the distributing valve stem, substantially as described.

21. In a steam engine valve gear, the combination of a bearing box, a standard integral with. said box, a rocking member in said box,.means for rocking said rocking member, an upright, reciprocatory are lever coupled of said rocking member, means. for connectlng one end of said arc lever in operative relation with said standard for mately upright reciprocation, an auxiliary crank, an auxiliary rod coupled to said crank, two approximately upright links, each having its lower end coupled vto the auxiliary rod and one having its upper end coupled to the oscillatory end of the are lever, anda bell crank coupled to the upper end of the other of said links and connected inoperative relation with the distributing valve stem, substantially as described.

' 22. In a steam engine valve gear, the combination of 'a bearing box, a standard inte-' gral with said box, a rocking member in said box, means for rocking said rocking member, an upright, reciprocatory are lever coupled between its ends to the outer end of said are lever in operative relation with staid standard for approximately upright reciprocation, an auxiliary crank,,an auxiliary rod coupled to said crank, two approximately upright links, each having its lower end coupledto the auxiliary rod and one having its upper end coupled to the oscillatory end of the are lever, and a bell crank coupled to the upperend of the other of said links and connected in operative: relation with the distributing valve stem, substantially as described.

23. In a steam engine valve gear, the combination of a bearing box, a standard integral with said box, a rocking memberin said box, means for rockingsaid rocking member, an upright, reciprocatoiy are lever coupled between its ends to the outer end of.

said rocking member, means for connecting one end of said are lever in operative relation with said standard for approximately upright reciprocation, an auxiliary crank, an auxiliary rod coupled to said crank, two approximately upright links, each having its lower end coupled to the auxiliary rod and one having its upper end coupled to the oscillatory end of the are lever, and a bell crank coupled to the-upper end of the other of said links and connected in operative relation with the distributing valve stem, substanlially as described.

24. In a steam engine valve gear, the combination of a bearing box, a standard integral with said box. a rocking member in saidbox, means for rocking said rocking member, an upright, reciprocatory arc lever coupled between its ends to the outer end of said rocking member. means for connecting approxione end of said are lever in operative rcla tion with said standard for approximately upright reciprocation, an auxiliarv crank, an auxiliary rod coupled to said crank, two approximately upright links. cach having its lower end coupled to the auxiliary rod and one having its upper end coupled between its ends to the outer end 1 to the oscillatory end of the are lever, and a bell crank coupled to the upper end of the other of said links and connected in operative relation with the distributing valve stem, substantially as described.

25. In a steam engine valve gear, the combination of a rocking member, an auxiliary reach rod in operative relation with said rocking member, a reversing lever, a rock I shaft in operative relation with said remately upright links, eachhaving its lower end coupled to the auxiliary rod and one having its upper end coupled to the oscillatory end of the are lever and the other having its upper end in operative relation with the distributing valve stem, substantially as described.

26. In a steam engine valve gear, the combination of a rocking member, an auxiliary reach rod in operative relation with said rocking member, a reversing lever, a rock shaft in operative relation with said reversing lever andsaid reach rod, an upright, reciprocatory are lever roupled between its ends to the outer end of said rocking member, means forming an upright slide-way connection for one end of said are lever, an auxiliary c unit, an auxiliary rod coupled to said crank, and two approximately upright links, each having its lower end coupled to the auxiliary rod and one having its up-' per end coupled to the oscillatory end of the arc lever and the other having its upper end in operative relation with the distributingvalve stem, substantially as described.

27. In a steam engine valve gear, the combination of 'a rocking member, means for rocking said rocking member, an upright, feiprocatory arc lever coupled between its ends to the outer end of said rocking member, means for guiding one end of said are lever for approximately upright reciprocation, an auxiliary crank, an auxiliary rod coupled to said crank, and an approximately upright link having its lower end coupled to said auxiliary rod between the ends of the latter and having its upper end coupled to the oscillatory end of tie-- arc lever, and

means connecting the outerend of said auxiliary rod into operativerelation with the stem of the distributing valve, as described.

28. In a steam engine valve gear, the combination of a rocking member'extending upward from its bearing, means for rocking said rocking member, an upright, reciprocatory are lever coupled between its ends to the up end of said rocking member,

means. or'guiding thenpper end of said are substantially lever for approximately upright reciproca tion, an auxiliary crank, an auxiliary rod coupled to said crank, and two approximately upright links, each having its lower end coupled having its upper end coupled to the lower end of the arc lever and the other having its upper end in operative relation with the distri-buting valve stem, substantially as described.

29. In a steam engine valve gear, the combination of a rocking member extending up ward from its bearing, means for rocking said rocking member, an upright, reciprocatory are lever coupled between its ends to 'the upper end of said rocking member,

means forming an upright slide way connection for the upper end of said are lever, an

auxiliary crank, an auxiliary rod coupled to said crank, and two approximately upright links, each having its lower end coupled to the auxiliary rod and one having its upper end coupled to the lower end of the arc lever and the other having its upper end in operative relation with the distributing valve stem, substantially as described.

30. In a steam engine valve gear, the combination of a rocking member extending upward from its bearing, an upright, reciprocatory arc lever coupled between its ends 9 to the upper end of said rockingmember, means for guiding the upper end of said are lever for approximately upright reciprocation, an auxiliary crank, an.auxiliary rod coupled to said crank, and two approximately upright links, eac 1 having its lower end coupled to the auxiliary rod and the rear of said links having its upper end coupled to the lower end-of the arc lever and the other link having its upper endin operative relation with the distributing valve stem, substantially as described.

- 31. In a steam engine valve'gear, the combination of a rocking member extending upward from its bearing, means for rocking said rocking member, an upright, reciprocatory' arc lever coupled between its ends to the upper end of said rocking member, means forming an upright slide way connection for the upper end of said are lever, an auxiliary crank, an auxiliary rod coupled to said crank, and two approximately upright links, each having its lower end coupled to the auxiliary rod and the rear of said links having its upper end coupled to: the lower end of the arc lever and the other link having its upper end in operative relation with the distributing'valve stem, substantially as described.

32. In a steam engine valve gear, the combination of a rocking member extending upward from its bearingmeans for rocking said rocking member, an upright, reciprocatorv arc lever coupledbetween its ends to the upper end of said rocking, memljer a to the auxiliary rod and one auxiliary rod and one having its upper end coupled to the lower end of the are lever and the other liavin its up er end in on a i l with the distributing valve stem, substantially as described.

33. In a steam engine valve gear, the combination of a rocking member extending upward from its bearing, means for rocking said rocking member, an upright, reciprocatory arc lever coupled between its ends .to the upper end of said rocking member, a fixed standard in operative relation with the upper end of said are lever for limiting saidend to upright movement, an auxiliary crank, an auxiliary rod coupled to said crank, and two approximately upright links,

erative relation each having its lower end coupled to the auxiliary rod and one having its upper endcoupled to the lower end of the are lever and the other having itsupper end in operative relation with the distributing valve substantially as described.

3a. In a steam engine valve gear, the combination of a rocking member extending up award from its bearing, an upright reciprocatory are lever coupled between its endsto the upper end of said rocking member, a fixed standard in operative relation with the up: per end of said are lever for limiting said end to upright movement, an auxiliary crank, an auxiliary crank, and two approximately upright links, each having its lower end coupled to the auxiliary rod and the rear of said links havingits upper end coupled to the lower end of the arc lever and the other link having its upper end in operative relation with the distributing valve stem, substantially as described. V

35. In a steam engine valve gear, the combination of a rocking member extending upward from its bearing means for rocking said rocking member, an. upright, reciprocatory arc lever coupled between its ends to the upper end of said rocking member, a fixed standard in operative relation With the upper end of said are lever for limiting said ends to upright movement, an auxiliary crank, an auxiliary rod coupled to said crank, and two approximately upright links, each having ils lower end coupled to the, auxiliary rod and the rear of said links having its upper end coupled to the lower end of the are lever and the other link having its upper end in operative relation with the distributing valve stem, substantially as described.

36. In a steam engine valve gear, the combination of a bearing box. a. standard inst em,

rod coupled to said' reasoni I i i end of the are lever and the other scribed,

i l i i i I tegral with said. box, a rocking member resting; in and rising from 5a box, means for rocking said. rocking picnic-cit, an uprlght, rccu rocalory are lever coupled hen-ween its ends to the upper end of said rocking mem ber, means for connecting the upper end of said are lever in operative relation with said standard or approximately upright reciprocation, an auxiliary crank, an auxiliary rod coupled to said crank, and two approxi mately upright links, each having its lower end coupled to theauxiliary rod and one having its upper end coupled to the lower having its upper end in operative relation with the distributing valve stem, substantially as de- 37 In a steam engine valve gear, the com bination of a rocking member extending upward from its bearing, an upright, reciprocatory arc lever coupled betweenits ends to the upper end oi said rocking member, means for guiding the upperyend of said are lever for approximately ,upright reciprocation, an auxiliary crank, an auxiliary rod coupled to said cranlti, two approximately'upright links, each having its lower end coupled to the auxiliary rod and one having; its upper end coupled to the lower end of the are lever, and a bell crank coupled to the upper end of the other of said links and connected in operative relation with the distributing valve stem, substantially as described.

38. In a steam engine valve gear, the combination of a rocking member extending upwa-rd from its bearing, means for rocking said rocking member, an upright, reciprocatory arc lever coupled between its ends to the upper end of said rocking member, means forming an upright slide way connection for the upper end of said are lever, an auxiliary crank, an auxiliary rod coupled to said crank, two approximately upright links, each having its lower end coupled to the auxiliary rod and one having its upper end coupled to the lower end of the arc lever and a bell crank coupled to the upper end of the other of said links and conected in operative relation with the distributing valve stem, substantially as described.

39. in a steam e11 gine valve gear, the COl'll". bination oi a rocking member extending up ward from its bearing, means for rocking); said rocking" member, an upright, reciprocai-ory are lever coupled between its ends to the upper end of said rocking member, a fixed stamlurd in operative relation with the upper end of said are lever for limiting said end lo upright movement, an auxiliary crank, an aux'liary rod coupled to said crank. two approximately upright links, lower end coupled to the auxiliary rod and one having its upper end coupled to the lower end of the are lever and dill a bell crank coupled to the upper end of the other of said links and connected in operative relation .with the distributing valve stem, substantially 'as described.

40. In a steam engine valve gear, the combination of a rocking member extending upward from its bearing, means for rocking said rocking member, an upright, reciprocatory arc iever coupled between its ends to the upper end of said rocking member, a fixed standard in operative relation with the upper end of said are lever for limiting said end to; upright movement, an auxiliary crank, an auxiliary rod coupled to said crank, tWo approximately upright links, each having its lower end coupled to the auxiliary rod and one having its upper end coupled to the lower end of the arc lever, and a bell crank coupled to the upper end of the other of said links and connected in operative relation with the distributing valve stem, substantially as described.

each having its lower end auxiliary rod and one havi and a 41. In a steam engine valve gear, thecombination of a rocking member extending upward from its bearing, an upright, reciprocato-ry arc lever coupled between its ends to the upper end of said rocking member, a fixed standard in operative relation with the upper end of said are lever for limiting said end to upright movement, an auxiliary crank, an auxiliary rod coupled to said crank, two approximately upright links, coupled to the g its upper end coupled to the lower end of the arc lever, and a bell crank coupled to the upper end of the other of said links and connected in operative relation with the distributing valve stem, substantially as described.

42. In a steam engine valve gear, the combination of a rocking member extending upward from its bearing, means for rocking said rocking member, an upright, reciprocatory arc lever coupled between its ends to the upper end of said rockingmember, a fixedstandard in operative relation with the upper end-of said are lever for limiting said end to upright movement, an auxiliary crank, an auxiliary rod coupled to said crank, two approximately upright links, each having its lower end coupled to the auxiliary rod and one having its upper end coupled to the lower end of the arc lever,

f bell crank coupled to the upper end of the other of said links and connected in operative relation with the. distributing valve stem, substantially as described.

.43. In a steam engine valve gear, the com-.

bination of a rocking member, a reversing lever, a reversing shaft in operative relation with said lever and said rocking memher, an upright, reciprocatory arclcver cou pledbctween its ends to the outer end of said rocking member, means for guiding one end of said are lever for approximately upright reciprocation, an auxiliary crank, an auxits lower end coupled to the auxiliary rod and one having its upper end coupled to the oscillatory end of the arc lever and the other having its upper end in operative relation with the distributing valve stem, substantially-as described.

l l. In a steam engine valve gear, the combination of a rocking member, a reversing lever, a reversing shaft in operative relation with said lever and said rocking member, an upright, reciprocatory arc lever. coupled between its ends to. the outer end of said rocking member, means forming an upright slideway connection for one end of said are lever,an auxiliary crank, an auxiliary rod coupled to said crank, and two approximately upright links, each having its lower end coupled to the auxiliary rod and one having its upper end coupled to the oscillatory end of the arc. lever and the other having its upper end in operative relation with the distributing valve stem, substantially as described.-

45. In a steam engine valve gear, the comto the outer end of said and :the rear of said links having its upper end coupled to the oscillatory end of the arc lever and the other link having its upper end in operative relation with the distributing valve stem, substantially as described.

46. In a steam engine valve gear, the combination of a rocking member, a reversing lever, a reversing shaft in operative relation with said lever and said rocking member, an upright, reciprocatory arc lever coupled between its ends tothe outer end of said rocking member, means forming an upright slideway connection coupled to said crank, mately upright links, each having its lower end coupled to the auxiliary rod and the rear of said links having its upper end coupled to the and two approxiend in operative relation with the distributing valve stem, substantially as described.

47. In a steam engine valve gear, the combination of a rocking member extending upward from its bearing, a reversing lever, a

reversing shaft in operative relation with said reversing lever and with said rocking for one end of said are lever, an auxiliary crank, an auxiliary rod oscillatory end of the arc lever and the other link haung its upper said rocking lation with the-distributing valve stem, sub- Liftmember, an upright, reciprocatory arc lever coupled between its endsto the upper end of member, means for guiding the upper end of said are lever for approximately upright reciprocation, an auxiliary crank, an auxiliary rod coupled to said crank, and two approximately upright links, each having its lower end coupled to the auxiliary rod and one having its upper end cou pled to the lower end of the arc lever and the other having its upper end in operative res-tantially as described.

s 4-8. In a steam engine valve gear, the com binat-ion of a rocking member extending upward from its bearing, a reversing lever, a reversing shaft in operative relation with said. reversing lever and with said rocking member, an upright, reciprocatory arc lever coupled between its ends to the upper end of said rocking member, means forming an upright slide way connection for the upper end of said are lever, an auxiliary crank, an auxiliary rod coupled to said crank, and two approximately upright links, each having its lower end coupled to the auxiliary rod and one having its upper end coupled to the lower end of the arc lever and the other having its upper end in operative relation with are - ative relation with v stem, substantiallv as lower end coupled 4th the distributing described .49, in a steam engine valve gear, the combination of a rocking'member extending up- Ward from .its bearing, a reversing lever, a reversing shaft in operative relation with said lever and with said rocking member, an upright, reciprocatory arc lever coupled bevalve stem, substantially as tween its ends of the upper end of said rocklng member, means for guiding the upper end of said are lever for approximately up- ;ight reciprocatioman auxiliary crank, an auxiliary rod coupled to said crank, and two approximately upright links, each having its to the auxiliary rod and the rear of said links having its upper end coupled to thelow'er end of the arc lever and the other link having its upper end in opert-he distributing valve described. f 50. In a steam engine valve gear, the comreversing shaft inoperative relation with saldreversing lever and with said rocking member, an upright, reciprocatory arc lever coupled between its ends to the upperend of said rocking member, means forming an upright slide Way connection for the upper end of said are lever, an auxiliary crank, an auxiliary rod coupled to said'crank, 'and two approximately upright links', eacl1 having its lower end coupled to the auxiliary rod and the rear of said links having its upper end coupled to the lower end of the arc lever and the other link having its upper end in operextending upa reverslnglever, a 1

lliary rod and one stem, substantially 'bination of a bridge'on the engine at-Jive relation with the distributing valve stem, substantially as described.

51. In steam engine valve gear, the combination of a bridge on the engine frame, a rocking member supported by said bridge, means for rocking said rocking member, an upright, reciprooatory arc lever coupled between its ends to the outer end of said rocking member, said, are lever for approximately upright reciprocation, an auxiliary crank, an auxiliar rod coupled to said crank, and two approximately upright links'each having its lwer end coupled to the auxiliary rod an one having its upper end the outer end of said rocking member, means for guiding one end of said arc lever for approximately upright reciprocation, an auxiliary cranln an auxiliary rod coupled to said crank, and two approximately upright links, each having'its lower end coupled to the auxhaving its upper end coupled to the oscillatory end of'the arc lever and the other having its upper end in operative relation with the distributing valve as described.

In a steam engine valve gear, the combinationof a br'dge on the engine frame, a rocking member supported by said bridge and extending upward from its axis, means for rocking said rocking member, an upright, reciprocatory arc lever coupled between its ends to the upper end of said rockmg member, means for guiding the upper end or" said arc lever for right reciprocation,

lower end coupled one having its upper end coupled to the of the tially as described.

54. In a steam engine valve gear, the comframe, a said bridge, a rocking and extending upward means for rocking said rocking member, an upright, reciprocatory arc lever coupled between its ends to the upper end of rocking member, means for guiding the upper end of said are lever for hearing seated on member seated in from said bear-mg,

approximately upright reciprocation, an

auxiliary crank, an auxiliary rod coupled to coupled to the oscillatory end of the arc'lever and the other havmeans for guiding one end of links, each having its lower end coupled to day of May,

said crank, and two approximately upright narne, in presence of two witnesses, this 10th 7 in the year one thousand nine '10 the auxiliary rod and one having its upper hundred and thirteen.

end coupled to the lower end of the are lever and the other having its upper end. in oper- WILLIA M SHERMAN BROWN ativ'e relation with the distributing valve. Witnesses: stern substantially as described. CYRUS KEHR,

In testimony whereof I have signed my H. P. STRAYER.

, Copies 01 this patent may be obtained for five cents each, by addressing the commissioner of Yatenti,

' Washington, D. C.

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