US289428A - Half to octayius b - Google Patents

Description

(Nomadi.) f l Y 8 T.MALOOLMSON.

STEAM GOVERNOR ,Y No. 289,428; Paented Dec'. 4, 1888.

NrTnD TATESv Arana Enron.

ATHOMAS MALOOLLWISON, AOFOIL CITY, PENNSYLVANIA, VASSIGNOR OF ONE HALF TO OOTAVIUS B. GOODVIN, OF SAME PLACE.

4STEAM-GOVERNOR.

. SPECIFICATION forming part of Letters i:Pateritll'ol 289,428, dated December 4, 1883.

` Application filed June 23, 1883. (No model.)

ToaZZ whom it may concern: Beit known that I, THOMAS MALcoLMsoN, a citizen of the United States, residing at Oil City, in the county of Venango and State of Pennsylvania, have invented certain new and useful Improvements in Steam-Governors, of which the following is a specication, reference being had therein to the accompanying drawings, in which- Figure l is aperspective of a steam-governor constructed in accordance with my invention. Fig. 2 is a central vertical section, and Fig. 3 a transverse section, of the same.

Like letters indicate like parts in all the gures.

rIhe invention herein disclosed is an iniprovement of that shown in a companion application, N o. 84,329, iled by me and now pending, in which certain features shown and not claimed are now claimed.

The object of the present invention is to provide means whereby increase or decrease of the speed of an engine shall automatically vary Jthe supply of steam to the same, so that the operation shall be uniform undervarying loads, Vand to accomplish this by simple, serviceable, and sensitive devices, wherein eentrifugal force acting against the tension of springs shall overcome said tension and liberatea counter-balance to effect, by suitable connecting mechanism, a variation in the supply of steam. Other objects and advantages will appear in the following description:

A represents the valve-chamber, which contains what is generally designated an oscillating valve,77 and is connected with the cylinder of an engine in such manner as to control the admission of steam therein to operate the piston, these parts being of any wellknown construction.

' B represents thevalve-rod, which is provided with an arm, B', connected to a post, B2. projecting from the face of a disk, C, mounted loosely upon a shaft, D, supported ina bracket, E, formed on or secured to the head of the valve-chamber A.` A is the ordinary stuifing-box for the valve-rodB. The shaft D is hollow throughout the greater portion of its length, and is provided with an oil-cup, D', communicating with its interior, and with apertures iilled with wooden plugs d, by which Upon the inner wall of the flange'g are secured the ends of springs H, in this instance two in number, but, if desired, more may be employed.

i To the free ends ofthe springs are secured weights I, with or without, as desired, friction pads or cushions i. The springs H are constructed and arranged to normally hold the weights against the periphery of the inner disk, C, with a predetermined pressure, and for this purpose the two screws t" i2 may serve as means of adjusting the degree of pressure exerted by driving in the inner screw, ft2, more or less. i

\ An arm, J, is secured to and projects from the disk C, and is provided with an adjustable weight, K, and a stop, L,projects from the face of the disk in such a position as to permit a slight rotation thereof in both directions, `the rotations being limited by the interposition between the stop L and the port BAl and arniB of one branch or portion of the bracket D.

The operation is as follows: The disk G, being rotated as described and in the direction indicated by the arrows, will, when the speed of its rotation is normal, simply rotate the disk C in the same direction and to such a distance that the arm B rests against the bracket E, as clearly shown in Fig. 1. Now, if the speed of the engine, from any cause, is increased-.say slightly and moment arily--the arm B may alternately recede from and ap` preach the bracket; or, in other words, may partake of a slight oscillatory movement by 4reason ofthe momentary decrease of pressure of theweights on the disk, but should the speed be increased to a marked degree, then centrifugal force operates in the weights I to over- IOO e l germes 9 come the tension of the springs, and the friction of the Weights being thus removed from the disk C, the Weight K acts by gravity 'to rotate the disk C in the opposite direction, and this movement of the disk, through the medium of the post I32 and arm B, turns the valve-rod B and cuts off the supply of steam, and hence reduces the speed'oi' the engine,

which in turn reduces the centrifugal force in the Weights, and they, by the tension of the springs, are again brought into contact with the disk C, Which is carried forward to the iirst position to automatically operate, as described. In this manner avery sensitive control of the steam-supply is secured.

It Will be observed that in case of any accidental breakage, running off, or other disconnections of the governor-belt from the pulley F, all resistance to the gravity of the weight K is removed, and hence it automatically, and through the connecting means shown and described, operates the valve rod B and the valve theretoattached, so as to shut off the supply of steam, whereby the engine is stopped Without the necessity of employing extraneous i or. other devices for that purpose.

Having described my invention and its operation, what I claim as new, and Wish to secure by Letters Patent, is-

l. In a steam-governor, an inner and an outer disk, the latter carrying spring-seatedy Weights bearing upon the inner disk, Which is connected with thevalve-stem and provided with a counter-balance, substantially as specified.

2. The combination of an outer continuously-rotatable disk, an inner oscillatory disk, springs secured to the former and bearing upon the latter, and means for varying the tension of the springs, substantially as specied.

3. The combination of the valve-chamber, a bracket secured thereto, shaft D, carrying disk C, its surroundingdisk G, springs secured to the latter, and having Weights I, with means for limiting the movement of disk C in one direction, and means for giving itamovement in an opposite direction, substantially as specied.

4. The combination of the outer disk, G, having iiange g, springs H, and Weights thereon, With disk C, having stop L and counter- Weight K, and with valve-stem B and bracket, substantially as shown and described.

5. The combination of bracket E, shaft D, its sleeve and pulley, with disks G and C. Weighted springs, arm B, rod B, arm J, and

' weight K, secured to the inner disk, substantially as shown and described.

6. The combination of an outer disk carrying spring-seated Weights adapted to be operated by a governor-belt, with an inner disk connected with a valve-stem and provided With acounter-balance, substantially as and for the purpose specified.

In testimony whereof I affix my signature in presence of two witnesses.

THOMAS MALCOLMSON.

Vitfiiesses:

WM. McNair, M. C. Yornnns.

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