US99751A - Improvement in governors for steam and other enginery - Google Patents

Description

.i strut inline JOSEPH BELL, or CINCINNATI, onto.

Letters Patent No. 99,751, dcteZ..Fcbruary 15, 1870,; antedated January 29, 1870.

IMPROVEMENT-IN GOVERNORS FOR STEAM ANDv OTHER IEN'G-Ill'll-IRY.V

The Schedule referred to in these Letters Patent and making partof the same.

To all whom 'it 'may concern: y

rBe it known that I, J osnrnj BELL, of Cincinnati, i'n the county' of Hamilton, and' State of Ohio, have invented a certain new and uset'ul Improvement in Governors iorSteam-Engines; and do hereby declare that the following is a full, clear, :uid exact description of the construction and operation ot the same, reference being had to the annexed drawings making part ofthis specification, in which` v f Figure I is a'perspective view of my improved governor.

Figure 1I is a vertical section of ythe lower part of the governor, showing the arrangement of the valve.

Figure Ill is a vertical section ot' l? and its connections, Fig. I.- Y

Prior to thel date oi' my invention many governors for steam-engines have been devised and applied to use. lu some of these the numberof revolutions desired to bemade per minute by the lcrank-shaft of the engine was regulated by the diameterY ofthe pulley on the crank-shari; and a pulley which operates the governor. y

In other governors the number of revolutions desired to be made had been regulated by means of a lever, pivoted at a convenient point to allow one end of said lever to be connected to the stem which operates' the governing-valve, and the other end of said lever extending beyond the governor, Vand having a movable weight arranged to slide back and forth, thus increasing or .decreasing the amount of resistance the v governor-balls had to contend with, and by this means regulating therevolutions ofthe crank-shaft.

lhe objects of my invention are to obviate the ditiiculties incident to working the old governor, retaining at the same time its good features, and consists- First, in mechanism for preventing the engine from ruiming very rapidly 'nu case the belt driving the governor should break er slip oit.

Second, in mechanism for regulating the number of revolutions of the crank-shaft of an engine which is intended to be made per minute.

ln orderthat others skilled in the art to which my invention appertains may understand the same, l will proceed to describe its construction and mode ot' .operation.

A is an arm, attached permanently to a valve-stem, B, said valve-stem 15 having both a sliding and rotating motion, as hereinafter more tully described.

C is a brace, fastened permanently to the frame F of the governor-stand,'and over' which the handle A slides.

D is a weighted pawl, pivoted at d.

E is a spiral spring, connecting the arm A and frame F.

G is a hollow cylindrical balance-valve, to govern the admission of steam to the engine.

H H H are ports or apertures through which the steam passes on its way to the engine.

I is a bush or cylinder, which is ufitted permanently into the hollowglobe J. I

L L L are apertures or ports in the bush or cylinder l, through which the steam passes to come in contact with thevalve G. Y

K is a chamber surrounding the bush I, and receives the steam, through the pipe M, from the boiler.

N, Figs. I andII, is a lever, vpivoted at O.

l?Y isa cylinder, which tits nicely over a collar, It, and so constructed as to slide on said collar.

S is a nut, fastened permanently into the cylinder P.

T is a thumb-screw, which works in the nut S, and has a collar, V, larger than the diameter of the hole in R on its lower end, which collar V plays against the lower bearingot'fR.

X is a spiral spring, which envelopes the thumbscrew T, the upper end of which bears against the nut S.

l isa collar which sets over the end of the lever N, and slides easily up and down the interior of the cylinder' P, and against which the lower end of the spiral spring X rests. l p

Q is a cone-shaped collar, permanently fastened to thc stem B, the apex of which tits snugly in a cavity in the shoulder ofthe handle A.

The operation of the governor is as follows:

When the engine is to be started the handle A is shipped or pulled over until it engages with the weighted pawl D, the valve G, being permanently attached to the stem B by means of an open frame on the lower end of G, will turn with the handle A. Then the handle A is in a' position to be caught by the weighted pawl D, and just above a slot in the brace C, the ports H H H will be on avertical line with those in the cylinder I. When the engine is started the balls of the governor will y out from centrifugal action, and bcing connected with the stem B will depress the arm A, and thus, cause it to enter a slot in the frame C; the weighted pawl DA then drops out ot' way, and assumes the position shown in Fig. I.

The steam entering the globe J surrounds thecylinder I and enters the apertures L L L, and comes in contact with the valve G as the action ot' the governorballs raises or lowers the valve G. The openings formed by the ports H H H and L LL are increased or diminished according to the pressure of steam admitted, or the different degrees of resistance the engine contends with, thus forming a simple and eflicient governor. l But if the belt which drives the governor should break or slip ott" the pulleys, the balls dropping from force of gravity would open the ports, admitting steam to the engine to their widest capacity; but as the balls drop, the arm-.A is raised out of the slotin the brace C, and the tension of the spiral spring E draws said arm around until it comes in contactwith a shoulder on the brace C, and just far enough to place the ports `in the valve Gv against the blank surface of the cylinder I, thus preventing the steam from entering the engine, thereby stopping it; 01 the spring and arm vthe other end entering a slot in the cylinder P, and

surrounds the"ihumb-screw T, its upper side bearing against the ilange U, as clearly shown in Fig. III. By turning the thumb-screw in the proper direction the cylinder l is made to slide over the flange R, thus compressing the spring X, which, being connected to the flange U, creates a pressure against the end of the lever N, which communicates said pressure tothe end ofthe lever N, connected with the stem B, thus causing the governol-balls to cont-end with a greater pressure as thel thumb-screw is tightened; and the governor-balls not raising as high as when the pressure isv removed, would open thegyorts of the valve G and cylinder I, admitting steam to the. engine, wider, and cause the crank-shaft of the engine to make more revolutions perminute than if the pressure were removed. By thus turning the thumb-screw, compressing or distendiug the spiral spring, a greater or lesser number of revolutions of the crank-shaft per minute can be made with the greatest facility and accuracy while the engine is running.

Having thus described my invention,

What I claim as new, and desire to secure by Letters Patent, is

1. 'lhe combination of the handle A and spring E, as described.

2. The combination ofthe handle A, spring E, and weighted pawl D, as described.

3. The lever N, receiving its power from a spr-ing, X, as described. v L

4. The combination of the screw T, nut S, spring X, and lever N, as described.

5. 'lhe brace C, having the slot described for t-he handle A to move in, in col'nbination with vthe handle A and pawl D, as described.

' J OSEPH BELL.'

Witnesses:

SAMUEL S.' MORRIS. M. M. OLIVER.

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