US337611A

US337611A - George

Info

Publication number: US337611A
Authority: US
Publication date: 1886-03-09
Anticipated expiration: 1903-03-09

Description

(No Model.) 7

G. PARKER, 7

AUTOMATIC STOP FOR STEAM ENGINES.

No. 337,611. Patented Mar. 9, 1886 'NITED STATES PATENT Price.

GEORGE PARKER, OF BAY CITY, MICHIGAN.

AUTOMATIC STOP FDR STEAM-ENGINES.

SPECIFICATION forming part of Letters Patent No. 337,611, dated March 9, 1886.

Application flied July 23, 1855.

To all whom it may concern.-

Be it known that I, GEORGEPARKER, of Bay City, in the county of Bay and State of Michigan, have invented new and useful Improvementsin Automatic Stops for Steam-Engines; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawing which forms a part of this specification.

This invention relates to a new and useful improvementin stop-motion for steam-engines, of which the following is a specification, reference being bad to the accompanying drawing, wherein my improvement is shown in elevation.

My stop-motion is designed to come automatically into action if the motion of the engine should increase beyond the limit of its normal action; and the object is to prevent the engine from running away and thereby occasioning loss by breakage and otherwise, as often happens through the failure of the gov ernor to act.

' My invention consistsin providing the throttle-valve of the engine with a tripping device so arranged that a detent, which is controlled by centrifugal force derived from the motion of the engine, will automatically trip it if the engine increases its motion beyond its normal limit, all as hereinafter described.

A is the crank-shaft of the engine, and B is afianged disk, preferably made in halves and bolted together, so as to be firmly secured to the crank-shaft.

G is a flying weight adj ustably secured upon the arm D,which latter is pivotally secured at a to the disk.

E is a coil-spring secured atone end to the arm D, and at the other to alever, F. The lever F is pivotally secured at b to the disk, and is provided at the rear end with an adjustingscrew, 0.

G is an upright secured in proximity to the flanged rim of the disk B.

H is a weighted bar loosely held in position by the guides d d, and is provided with an ottset or shoulder, e, which, when engaged upon the edge of theguide d, prevents the weighted bar from dropping by its weight through the 5g guides (1 cl.

Serial No.172,395. (No model.)

I is the throttle-valve of the engine. J is its actuating lock'lever, provided with a counter-weight, K,and an arm, L, for unlocking, all so arranged that by pulling on the free end of the arm L the lever J is unlocked, and, impelled by the gravity of the weight K, automatically turns off the steam.

M is a chain or rope connected at one end to the unlockingarm L of the throttle-valve le' ver, and at the other to the upper end of the bar H, suitable sheaves being used to support the chain 011. The operating lever of the steam-whistle N is also preferably connected to this chain.

In practice the parts are so arranged that when the speed of the engineincreases beyond its normal limit the centrifugal force of the flying weight 0 becomes so great that the end of the arm D is projected beyond the rim or flange of the disk B, (a suitable slot being made in the rim for that purpose,) and, acting as a detent, it strikes in the revolution of the disk against the bar H, and pushesit sufiiciently back to release its shoulder e from engagement upon the guide d, allowing it to drop by its gravity, when, by reason of the connecting-chain M, the actuating-lever ot' the throttlevalve islikewise released and the steam thereby automatically turned off, while the whistle is automatically set blowing.

The throttle-valve herein described is the one patented to me March 3, 1885, No. 313,365; but it is obvious that any throttle-valve may be made self-closing in a similar manner, and I therefore do not want to confine myself to this construction alone.

What I claim as my invention is 1. In a speed-governor, as described, the combinatiomwith the weighted lever O D, pivoted to and actuated from the main shaft of an engine, of an adjustable elbow-lever and a spring connecting the two levers, so as to regulate the rate of speed at which the weighted lever shall operate, as set forth.

2. In aspeed-governor,the combination,with the throttle-valve, as described, a tripping device,and connections, of the weighted lever D, the lever F, spring E, and adjusting'screw c, as and for the purposes set forth.

3. In combination with the throttle-valve I,

arranged to be self-closing when tripped, the flying weight 0, and the coil-spring E, havchain M, the suspended bar H, having shduling adjusting devices, such as the lever Rand der e, the rest (1, the arm D, controlled by adjusting-screw c, all arranged substantially the centrifugal force of the engine, and the as described. 5 disk B, all arranged substantially as described. GEORGE PARKER.

4. The combination of the upright G, liav- Witnesses: ing guides d d, the weighted bar H, having H. S. SPRAGUE, shoulder e, the'disk B, the arm D, having E. J. SOULLY.