US700004A - Governor. - Google Patents

Description

' Patented May 13, I902.

' E. ARMSTRONG.

G 0 VEB N 0 B0 (Application filed Nov. 20,, 1901- (No Model.)

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UNITED STArEs PATENT OFFICE.

EDWIN J. ARMSTRONG, OF ERIE, PENNSYLVANIA.

GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 700,004, dated May 13, 1902. Application filed November 20, Serial No. 83,069. (No model.)

To all whom it may concern:

Be it known that I, EDWIN J. ARMSTRONG,

a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsyl: Vania, have invented certain new and useful Improvements in Governors; andIdo declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates generally to governors, and particularly to shaft-governors for steam-engines; and-it has for its object to provide a shaft-governor of few parts, of simple and inexpensive construction, notliable to derangement by Wear, and which shall be capable of controlling the speed of the engine to which it is attached with a high degree of accuracy; and it consists of the parts and combinations of. parts hereinafter described and claimed.

In the accompanying drawing, forming a part of this specification, is illustrated a side:

elevation of my improved governor.

The two primary requirements in a gov-' ernor of this type are, first, that it should be balanced against the disturbing action of gravity, and,- second, that friction should be reduced to a very small amount. These requirements are met and the object above named attained by the mechanism now to be described.

Referring to the drawing, A represents the shaft upon which the fly-wheel or carrier B is mounted. An eccentric O is mounted upon a pivot a from the wheel or carrier and is adapted to be swung through a suitable arc thereon.

D is an arm extending laterally from the eccentric and pivotally connected at its free end to the end of a link E, the other end of said link being pivotally connected to a weight F, mountedon the free end of aspring G, which is attachedto thev carrier or wheel.

The weight F is preferably made of such proportions that it will balancethe eccentric 0, together withthe eccentric-strap and other parts whichmay be attached thereto.

The motion of the Weight and eccentric being in opposite directions, it is apparent that the disturbing action of gravity which exists of the weight.

where the movement of one part of a governor is not accompanied by a movement in the opposite direction of some other part of equal gravity moment is provided against. The Weight F being carried by the spring G and having its centrifugal force entirely resisted by saidspring, none of the centrifugal force of said weight is transmitted through the piv ots of the governor. Therefore the strains upon said pivots are very small vand not great enough to interfere with their proper lubrication or to cause serious wear.

The link E is so constructed as to be adj ustable lengthwise, which while not essential to the proper working of the governor affords a convenient adjustment for varying the positions, and consequently the centrifugal force,

As shown, the link Eis composed of an internally-threaded member into which an externally-threaded member screws, and a nut is employed to secure the parts in their adjusted position.

I am aware that a gravity balance in shaftgovernors is old in the patent to John E. Sweet, No. 252,276, January 10, 1882, and that it is also old to mount a weightupon a spring so that the weight is both carried and its centrifugal force resisted by said spring, as shown by the patent to D. A. Woodbury, No. 107,7 46, September 27, 1870, and I make no claim for such devices per se, but only to the means whereby the useful results obtained by the use of these two known devices are combined in'the same governor, since the gravity-balance andthe removal of strain from the piv- Having thus described my invention,- what I claim as new, and desire to secure by Letters Patent, is-

1. The combination in a shaft-governor of a carrier, an eccentric pivotally mounted thereon and adapted to be shifted through'a'suitable range, a centrifugal weight, a spring upon which said Weight is mounted and means whereby said weight and eccentric are'so con nected that their movements will bexin oppo site directions and of approximately equal gravity moment,thereby balancing the weight of the eccentric, and also so that the centrifugal force exerted by the weight shall not be transmitted through the pivots of the govnor that their movements shall be in opposite 1o ernor. directions.

2. The combination inashaft-governor of a In testimony whereof I afifiix my signature carrier, an eccentric pivotally mounted therein presence of two witnesses. on and adapted to be shifted through a suitable range, a centrifugally-acting weight, a EDWIN ARMSTRONG spring upon which said weight is mounted, \Vitnesses: and a longitudinally-adj ustable link connect- JUSTIN P. SLOOUM, ing said eccentric and weight in such a man- ANNA E. NUNN.

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