US655927A - Valve-gear. - Google Patents

Description

No. 655.927. Patented Aug. l4, I900. c. n. P.6IBSON. VALVE GEAR.

(Application filed July 18, 1889.) (No Model) 2 Sheets-Sheet l.

Inuerzfar No. 655,927. Patented Aug. l4, I900.

C. D. P. GIBSON.

VALVE GEAR.

I (Application filed July 18, 1899.) (No Model.) 2 Sheets-Sheet 2.

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CHARLES D. P. GIBSON, OF JERSEY CITY, NEW JERSEY.

VALVE-G EAR.

SPECIFICATION forming part of Letters Patent No. $55,927, dated August 1.4, 1900. Application filed July 18,1899 Serial no. 724,268. (No model.)

T0 on whom it may concern:

Be it known that I, CHARLES D. P. GIBSON, a citizen of the United States, residing at Jersey City, in the county of Hudson and State of New Jersey, have invented new and useful Improvements in Valve-Gears, of which the following is a specification.

Myinvention relates to valve-gear for fluidpressure motors or engines, and contemplates the provision of a valve-gear which while adapted to permit of an engine being quickly .and is illustrated and described in said application. It may, however, be used to advantage in various other connections.

The construction and operation of the gear will be fully understood from the following description and claims, when taken. in conjunction with the annexed drawings, in which- Figure 1 is a longitudinal vertical section illustrating my improved valve-gear. Fig. 2 is a plan view of said valve-gean. Figs. 3 and 4 are detail enlarged sections taken in the planes indicated by the lines 3 3 and a 4, respectively, of Fig. 2. Fig. 5 is an enlarged detail section taken through a portion of the valve-gear.

In the said drawings similar letters designate corresponding parts in all of the several views, referring to which--- A is the bed of an engine; B, adrive-shaft journaled in standards a, rising from the bed and equipped with cranks (J; D, rods connected to the cranks C and designed to be connected with pistons, (not shown,) and E rods which are designed to be connected with valves (not shown) for controlling the induc tion and eduction ports of the cylinders con taining the said pistons.

The cranks C are disposed as shown, and hence it is necessary to simultaneously move the pistons to which the rods D are connected in opposite directions. To this end I provide a valve-gear comprising oppositely-disposed eccentrics F on the shaft 13, links G, having straps 19, receiving the eccentrics, link-blocks H, arranged in the links, and rods I, interposed between and pivotally connected to the link blocks and valve-rods E. By reason of this gear the valve-rods E will be simultaneously moved in opposite directions, as will also the piston-rods D.

For the purpose of adjusting the links and valves I provide the turn-rods J, which have oppositely-threaded ends arranged in threaded Sockets 0 (l, pivotally connected to the links G and bed A, respectively, as shown.

In order to enable the engineer to readily reverse the direction of movement of the engine, the reversing mechanism (best'shown in Fig. 1) is provided. This mechanism is supported by a shaft 6, arranged in standardsf, rising from the bed A, and in the preferred embodiment of the invention comprises arms 9, loose on the shaft 6 and connected bylinks It on the rods I, collars 1', fast to the shaft 6 and having shoulders j, (see Fig. 5,) designed for the engagement of similar shoulders on the arms g, a spacing-collar it, loose on the shaft, a lever Z, fast on the shaft a lever m, loose on the shaft e and having an arm a, connected to a resilient strap p, interposed between the arms 9, a rod 1", having a lateral arm 8, and .a link 2, connecting said arm 3 and the lever m. The rod 4" is designed to be connected with a lever or other suitable handle, (not shown,) and when it is moved in the direction indicated by arrow in Fig. l and the lever lis swung forwardly the lower shoulders 3' mi of the collars ft abutting against the lower shoulders of the arms g will swing said arms g and the rods I upwardly, and thereby raise the blocks Hto the upper ends of the links G and reverse the engine. At the same time the lever m, by reason of the connection between the same and rod '1', is swung forward at a greater rate of speed than the lever Z, and its arm n is swung upward faster than the arms g, with the result that when said arms g reach their uppermost position the resilient strap 19 will be bowed upwardly, and consequently enabled to securely hold the link-blocks H against casual movement from their position at the upper ends of the links Gr. hen, on the other hand, the rod 0* is moved in the direct-ion opposite to that indicated by arrow and thelink-blocks H are carried at the lower ends of the links G, the resilient strapp will be bowed downwardly, and hence enabled to hold the link-blocks against casual upward movement.

Itfollows from the foregoing that while the engine may be quickly and easily reversed whenever the engineer so desires there is no liability of said engine being casually reversed, which is an important advantage.

The collars 2' and arms g are so arranged with respect to each other as to afford lost motion and permit a slight oscillatory movement of the said arms 9 incident to the reciprocatory movements of the rods I, and for the same reason the arm n is made in two sections, which are connected together after the manner of a swivel, as best shown in Fig. 4.

When desirable, a spring, such as M, may be interposed between the rod 0" and the bed A for the purpose of assisting in returning the parts to the position shown in Fig. 1, which is the normal running position. Said spring is not, however, essential and may be dispensed with, if desired.

Having thus described my invention, what I claim is- 1. In a valve gear or mechanism, the combination of a valve-rod, an eccentric, a link having a strap receiving the eccentric, a linkblock, a rod connecting said block and the valve-rod, two levers of different lengths fulcrnmed on a common center; the larger of said levers being connected with the rod between the link-block and the valve-rod, and a resilient connection between said levers, substantially as specified.

2. In a valve gear or mechanism, the combination of a valve-rod, an eccentric, a link having a strap receiving the eccentric, alinkblock connected with the valve-rod, and two levers mounted on a common center; one of said levers being connected with the linkblock and the other lever being arranged to move faster than the first-named lever and being connected thereto by a resilient device adapted to bow, substantially as specified.

blocks, rods connecting said blocks and the valve-rods, a suitably-supported shaft, arms mounted on the shaft and connected with said rods, a resilient strap interposed between said arms, a lever on the shaft for rocking the said arms, a smaller lever on the shaft having an arm connected to the resilient strap, and an operating-rod connected to the larger lever and having a lateral arm connected with the smaller lever, substantially as specified.

4. In a valve gear or mechanism, the combination of valve-rods, eccentrics, links having straps receiving the eccentrics, linkblocks, rods connecting said blocks and the valve-rods, a suitably-supported shaft, arms mounted on said shaft and connected with the latter rods, a resilient strap interposed between said arms, a lever on the shaft for rocking the said arms, a smaller lever ful- ,crumed on the shaft and having an arm connected to the resilient strap and comprising two sections connected in a swiveled manner, and means for operating the levers, substantially as specified.

5. In a valve gear or mechanism, the combination of a valve-rod, an eccentric, a link having a strap receiving the eccentric, a linkblock connected with the valve-rod, a lever connected with thelink-block, a second 1ever, an operating device for rocking the levers, and a connection between the levers whereby the link-block is held against casual movement when moved to either end of the link, substantially as specified.

6. The combination with the link-block of a valve-gear; of a lever for moving the linkblock, a second lever arranged to move faster than the first-named lever, and means controlled by the second lever whereby the linkblock is held against casual movement when moved to either end of the link of the valvegear, substantially as specified.

7. The combination with the link-block of a valvegear; of a lever for moving the linkblock, a second lever of less length than the firstnamed lever; said levers being fulcrumed on a common center, means for rocking the levers, and means controlled by the second lever whereby the link-block is held against casual movement when moved to either end of the link of the valve-gear. substantially as specified.

8. The combination with the link of a valvegear, and a valve-controlling block fitted to slide therein; of means for quickly moving the block to either end of the link, and a block-controlling device connected to and actuated from the block-moving means for holding the block positively in its set position against either end of the link.

9. The combination with link-blocks of a valve-gear; of a lever, connections between the lever and blocks, a second lever, and means operated by the second lever for holdin g the blocks against casual movement, substantially as specified.

10. The combination with the link-blocks of a valve-gear; of arms mounted on a shaft and connected with the blocks, an arm mounted on the shaft between the first-named arms, a spring-strap interposed between and connected to the outer arms and also connected to the intermediate arm, and means for moving the intermediate arm faster than the outer arms, substantially as specified.

In testimony whereof I have hereunto set my hand in presenceof' two subscribing witnesses.

CHARLES D. P. GIBSON.

Witnesses:

CARL LUoK, HARRY SHICK.

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