US289427A - Half to octayius b - Google Patents

Description

' Patented Dele. 4,- 1883.

N. PETERS. Pmumxmgmnm. msnmgm. n, C.

T. MALGOLMSON.

STEAM GOVERNOR (No Modl.)

Ormea,

PATENT THOllIAS MALOOLMSON, OF OIL CITY,

PENNSYLVANIA, ASSIGNOR OF ON E HALF TO OOTAVIUS B. GOODWIN, OF SAME PLACE.

STEAM-GOVERNOR.

' l SPECIFICATION forming-part of Letters Patent No. 289,427', dated December 4, 1883.

Application tiled February 8, 1883. (No model.)

To all wiz/m zit may concern,.-

Be it known that I, '.IrroMAs MiiLcomrsoN, 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 Stealn-Governors, of

which the following is a specification.

f My invention relates to a governor designed for the purpose of controlling the supply of Io steam to the cylinder of an engine, in order that its speed of operation shall be uniform, the object being to control said supply of steam by devices which shall be as simple, sensitive, and practical as possible. In this instance I have adapted my invention for operation in its spring-Weights and surrounding disks; and Y Fig. et represents modifi cations of a'governor7 s spring-Weightconstructed in accordance with l 3o my invention.

Like letters refer to like parts in all the tigures.

A represents the valvechamber, which contains an ordinary oscillating valve, the cham- 5 ber being supposed to be connected with any ordinary steam-chest to regulate the supply of steam thereto in the usual Well-known manner.

B represents the bracket,secured in any suit- 4o able manner to one end ofthe valve-chamber,

and it serving to support ashaft, C, seated in the apex of the arch of the bracket, andsecured thereto by a nut, c. By this means the shaft "is held rigidly in the bracket, and serves as a support for the flanged disk D, and also for a second disk, E, rigidly secured to or formed integral with a sleeve, E', to which is rigidly secured the belt-pulley E2. The disks D and E are loosely journaled upon the shaft 5o C, and retained from longitudinal movement thereon by a nut, c', at the end of saidshaft.

The shaft C is hollow throughout a portion of its length, sufficient in extent to serve as an oil-chamber for the sleeve E', perforations c" being made in the walls ofthe chamber and filled With Wooden plugs or tiber,'the grain of 5 5 which is disposed lengthwise in the perforations,in order to conduct, by capillary attraction, the oil from the chamber through the perforations and against the inner or bearing surface of the sleeve. An elbow, C', is fitted to 6o the outer end of the oil-chamber, and is pro` vided with an oil-cup, G2. The disk D is provided in this instance with a projecting arm,

D', to which is adjustably secured the counter-balance D2. To the disk E are secured, in this instance by dat arcsprings E3, suitably bent and conformed to its periphery, Weights E4, which, by said springs, are in this instance forced inwardly against the periphery of disk E. Friction-pads care secured in dovetailed 7c recesses formed in the outer surface of the 'Weights El.

In an operative position the disk D incloses the disk E and its Weights and springs, and projecting from its outer dat surface there is 7 5 a post, F, to which is rigidly secured an arm,

F, projecting inwardly and secured rigidly to the val ve-stem G by means of apin, f, or other- Wise.

Upon the opposite side of one brauch of the 8o bracket-arch from that at Which point the post F is located is another post, F2, projecting also shaft C, and passes through a stuffing-box, G',

projecting from the face-plate of the bracket B, as clearlyshown in Fig. 2.

As thus far described, it will be seen that as motion is first given to the pulley IE.'2 by the 9o usual governor-belt, the sleeve E and disk E are rotated, and that this rotation is independent of disk D and has no effect upon the valvestem, the valve secured thereto being retained open by the weight or counter balance D 95 when the engine starts, but when the speed of rotation of the sleeve and its disk :and the i springs and Weights Ei, secured thereto, as described, is sufcientto force or throvvr by centrifugal impulse said Weights against the roo retractive force of the springs` and away from the disk E, said weights come in contact'with the inclosing-fiange of the disk D, and communicate motion thereto, so as to partially revolve it, and thus lift the counter-balance D2, and partly rotate the valve-stem by means of the rigidly-attached arm F, secured to post F, which arm and post move with the disk. By this means the valve is closed, the supply of steam shut off, and the speed of the engine reduced. When so reduced sufficiently, the tension of the springs withdraws the weights from the fiange of disk D, and the counterbalance D2 restores said disk, post, and arm and the valve-stem to their original position. The counter-balance D2 is adjustably'secured to the arm D', in order to regulate the amount of friction exerted by the springs upon the flange of disk D, so that more or less of the said friction shall be necessary to operate the disk and valve-stem. It is readily seen that lif the counter-balance is set near the disk less friction will be required to lift the counter-balance than when set a distance therefrom. By this means exceedingly fine adjustment is secured, and a like sensibility in the governor,

as constructed, to variations in the speed of the engine is attained.

It is apparent that many modifications or variations in the mechanism of a governor constructed in accordance with my invention are within the scope of mechanical skill-' as, for instance, instead of the fiat arc-springs conformed to the periphery of the disk E, arms h may be hinged to the periphery of the disk E and provided with frictional weights c2, retained from the disk D by retractible coiled springs.

Elliptical springsz', secured to the periphery of the disk E, may be interposed between the iianges of the disks D and E, and weights secured to the outer leaf'thereof. Coiled springs may be secured to the inner disk and provided with radiating weights j, and adapted to slide in grooves therein and project against the fiange of the outer disk. Furthermore, the disks may be in skeleton form-that is, comprising hubs, spokes, and a fiange. If desired, one or more of said spokes may be hollow and a weight inclosed therein in the form of a piston, secured to the hub or spoke by a retractible spring. Other means may be'employed for lubricating the journals of the moving parts, and instead of the exterior counter-balance, D2, supported by a rigid arm to the disk D, a strap or chain supported upon the periph,- ery of the disk, and having a counter-balance secured thereto, may be employed, or a retractible spring may be secured to the arch B at one end and to the arm F or post F or F2 at the other end, to take the place and perform the functions of the counter-balance. A helical spring placed between the disks D and E, and having one end secured to each one of these disks, may also perform the same function.

The invention herein disclosed is an improvement upon the construction shown in a companion application filed by me and pending at the same time.

Having described my invention and its operation, what I claim isl. In a speed-governor for steam-engines, the combination of a shaft, a flanged disk loosely jonrnaled thereon, connected to the valve-stem an d inclosin g a second disk', and in- 7 5 terposed`weights connected by springs to said inclosed disk,with a counter-balance, or its described cquivalent, secured to the inclosingdisk, and means for revolving the inclosed disk, substantially as described.

2. In a speedgovernor for steam-engines, the combination of a shaft adapted to receive the end of the valve-stem, a bracket for its support, a flanged disk, D, journaled upon the shaft and provided with an arm connected to the valve-stem, and a stop-post, F2, with a sleeve provided with a fianged disk, E, means for revolving the disk E, and weights connected to the flange of said disk, and adapted to be thrown therefrom by centrifugal impulse, substantially as specified.

3. In a speed -governor for steam-engines, the combination, with the valve-stem, of two iianged disks, one arranged within the other, interposed weights adapted to -be forced by centrifugal impulse from one disk to the other, and a counter-balance, or its described equivalent, substantially as specified.

4. A steam-engine speed-governor consisting of a shaft carrying a disk provided with weights retained. by springs, having one end' secured thereto and adapted to be thrown off by centrifugal motion, in combinationwith a surrounding disk to arrest the centrifugal momentum of said weights and by friction therewith reduce the speed of the disk and governor-shaft, substantially as and for the purpose described.

5. The combination of the hollow shaft C, perforated as described, wooden plugs c2,`the elbow C', oil-cup C2, sleeve E', and disk E, of a governor carryingweights secured to springs, substantially as specified.

6. 'Ihe combination ofthe bracket B, shaft C, disks D and E, weights secured to springs between saiddisks, and adjustable counterbalance D2, with the valve stem G and suitable connections, substantially as specified.

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

THOMAS MALCOLMSQN.

IOO

IIO

VVit-nesses:

WM. MCNAIR., N. H. CooP'n.

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