US2231314A - Reversing valve gear - Google Patents

Description

Feb. 11,; 1941..

REVERSING VALVE GEAR J. AMOUR 2,231,314

Filed May 22, 1939 3 Sheets-Sheet 1 Inventor- @Wigmazzr/V- 'A tiarneys Feb. l1, 1941.y 4 J, AMOUR 2,231,314

REVERSING VALVE GEAR Filed May 22, 1939 3 Sheets-Sheet 2 Inventor .ma'jiazourfw 'By'l WLM 5m Attorneys Feb. 11, 1941. J, AMOUR REVERSING VALVE GEAR Filed May 212, 1939 3 Sheets-Sheet 3 Inventor ff'lzesM/zazrr 'Y' l v a By @Hw A torneys Patented Feb. 11, 1941 p 2,231,3i4

STATES PATENT REvEnsING VALVE GEAR James Amour, Frackville, Pa. Application May 22, 1939, serial No. 275,075

1 Claim. (c1. 121-164) This invention relates to reversing valve gear The slot I1 loosely receives the stem I6 and for locomotives, the general object of the npermits rocking movement of the stem. A vention being to provide a compact arrangement block I8 has sliding movement in the slot I5 of the parts, with the parts supported from and is pivotally connected to one end of a lever the cross head guide and also to provide means I9 which has its other end pivoted to a part for advancing the valve lead as the engine speeds of the bar 3, as shown at 20 and an intermediup to any desirable or satisfactory working lead. ate part of the lever I9 is pivoted to a part This invention also consists in certain other of the cross head as shown at 2I as more parfeatures of construction and in the combination ticularly shown in Figure 4. This arrangement 10 and `arrangement ofthe several parts to be hereis such that the triangular member i4 will be 10 inafter fully described, illustrated in the acraised and lowered by the reciprocatory movecoinpanying drawings and specifically pointed ment of the cross head under the action of the out in the appended claim.` piston in cylinder I. The member Id can also In describing the invention in detail, reference be tilted as vwill be hereinafter described.

Wip be had to the laccompanying drawings An inverted U-shaped frame 23 is fastened 15 wherein like characters denote like or correto the top of ythe guide member 5 and a rockable spending parts throughout the several views, and link frame 24 is supported in the frame 23 by in which: means of the trunnions 25 extending from. inter- Figure l is an elevation of the device, this mediate parts of the side members of the frame view also showing a cylinder and a valve and a 24 and engaging bearing members 26 attached 23 drive Wheel, to the side members of the frame 23. The link Figure 2 is a top plan View of the parts shown frame 24, aS ShOWn in Figure 5, includes the in Figure 1. three curved bars 21, 28 and 29 held in spaced Figure 3 is a section on the line 3--3 of Figrelation by the rivets 33 passing through the ure l. upper and lower ends with spacers 3I on said 25 Figure 4 is a section on the line 4.-4 of Figrivets. An arm 32 is welded or otherwise rigure 1. idly connected to an intermediate part of the Figure 5 is a perspective View of the rocking outerface of the bar 21 and the adjacent trunframe, Ynion 25 may be carried by the inner end of this 30 Figure 6 is a View showing the slotted memarm 32 or said trunnion may be attached to the 30 ber of the rocking frame separated from the bar 21 and passed through a hole in the arm 32 rest of the frame to show how the pin of an with the arm rigidly connected with the trunarm engages the slot of said part. nion. 'Ihe other end of the arm 32 is connected Figure 7 is a view of the block assembly which to an elongated block 33 at one end of the has sliding movement in the rocking frame. block and the other end of the block being 35 In these drawings the numeral I indicates a pivoted, as at 34 to the upper end of the tricylinder of the locomotive which contains the angular-shaped member I4. usual piston, the rod 2 of which is connected The bar 21 of the frame 2li is formed with with the cross` head 3 slidably arranged in the an elongated slot 36, see Figures 5 and 6, the 40 guide member 5 and said cross head is connected major portion of which is of i'lat arcuate shape 40 by the bar B with the crank 1 of the drive Wheel and one end portion is substantially straight as 8. The flow of steam to the cylinder I is conshown at 36 and with anintermediate portion trolled by a valve in the chest 9, said valve being 36" extending at an incline and connecting the reciprocated by means of a link IB pivotally conpart 36 with the major part of the slot. A pin nected as shown at II to the stem I2 of the 31 passes into the slot and is attached to one 45 valve, the connection IIincluding means conend of an arm 38 having its other end pivoted nected to a slide arranged in a guide member I3, to the end of -a block 40, the other end of the All the above features are conventional. block 40 being CODneCted t0y the Din 4| Which In carrying out my invention, I provide a subpivots the block 33 with the arm 32. As shown stantially triangular-shaped member I4 which in Figure 5, the bloclm 33 and 40 with the pin 50 is formed with an enlarged base portion having 4I form a crank which is carried by the arm an elongated slot I5 therein and a stem I6 32 and pivotally connects the arm 38 With the extends downwardly from the central portion of triangle I4. The arm 38 passes through a block the base through a slot I1 formed in the base 42 which has a slot 43 therein` through which of the guide member '5 of the cross head 3. the arm 38 slidingly passes. The block 42 is 55 pivotally connected to a plate 44 attached to a slotted block 45, the slot of which has the bar 29 of frame 24 slidingly passing therethrough and a third slotted block 46 has its slot slidingly receiving the bar 28 of frame 24 and this block 46 is connected to the block 45 by a pin 41. See Figure 7. This pin 41 passes through a hole in the link I0 which is connected with the stem I2 of the valve in chest 9, the link I0 projecting beyond the pin 41 where it is connected by a pin and lslot connection shown generally at 50 with a bellcrank lever 5I which is connected in a suitable manner to a control member in the cab of the locomotive so that the parts can be manipulated by the engineerV to adjust the block assembly shown in Figure 7 on the rockable link frame 24 and during this adjustment the pin 31 of the arm 38 moves in the slot 36 in bar 21 of the frame as said arm 38 slides through the slot 43 of block 42 of the block assembly.

As will be seen during reciprocatory movement of the cross head 3 by the piston in cylinder I, the triangular member I4 will be raised and lowered and this substantially vertical movement of the member I4 will impart a rocking movement to the link frame 24 due to the fact that the frame I4 is connected to the frame 24 by the arm 32 and block 33 with the pivot 34.

This rocking movement of link frame 24 will reciprocate the valve in chest 9 through the connections I0, II and I2, and the block assembly shown in Figure 7 if said block assembly is either in a position below the transverse center of the frame 24 or above said transverse center, it being understood that the block assembly is adjusted in the frame 24 b-y means of the bellcrank 5I connected with the extended end of the link I0. If Ithe block assembly shown in Figure 7 is in a center position in the frame 24 then the parts are in neutral position and the rocking of the link frame 24 will not move the valve in chest 9.

When the bar I0 and the block assembly shown in Figure 7 are at the bottom of the link frame 24 the engine will be in a forward motion and when the block assembly is at the top of the link frame 24 the engine will be in reverse motion and in either one of these two positions of the valve parts the movement of the member I4 by the lever I9 under the action of the connecting rod 6 will cause the link frame 24 to move the valve parts to give the valve substantially its full stroke. By adjusting the member 5I to move the block assembly upwardly or downwardly from one end or the other the arm 38 is shifted and the pin 31 will engage an intermediate part of the groove 3E which moves the arm 38 to the right in Figure 6 and this turns the crank composed of the blocks 33 and 40 and the pin 4I and thus shorten the connection between the arm 32 and the top of the triangle I4 and thus movement of the link frame 24 by the triangular member I4 is reduced and, of course, this reduces the stroke of the valve. This movement of the parts 40, 33 and 4I by the arm 38 also tilts the triangle I4 which, in turn, brings the point of valve setting to a more lead opening.

It is thought from the foregoing description that-the advantages and novel features of the invention will be readily apparent.

It is to be understood that changes may be made in the construction and in the combination and arrangement of the several parts provided that suchl changes fall within the scope of the appended claim.

Having described the claimed as new is:

A valve gear for locomotives comprising an oscillatable link frame, a part of which has a cam slot therein, a block assembly slidably arranged in the link frame, a link connected with the valve and rotatably connected with the block assembly, means for adjusting the link to move the block assembly vertically in the link frame, a vertically arranged frame guided for vertical movement and for slight tilting movement, said frame having a substantially horizont-al slot therein, a block slidably arranged in the slot, a lever having one end connected with the block, means for pivotally connecting an intermediate part of the lever with the cross head of the engine, and means for connecting the opposite end of the lever with the connecting rod of the engine, an -arm fastened to the link frame, a crank pivotally connected with the outer end of the arm, means for connecting the crank with the vertically movable frame for transmitting movement of the frame to the link frame, a second arm slidably arranged in the block assembly, a pin at one end of the second arm engaging the cam slot and means for pivotally connecting the other end of the second arm to the crank for adjusting the crank by the movement of the second arm by movement of the pin in the slot when the block assembly is adjusted.

invention, what is JAMES AMOUR.

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