US780511A - Centrifugal speed-regulator. - Google Patents

Description

PATENTED- JAN. 24, 1905.

R. LEWIS. "GENTRIPUGAL SPEED REGULATOR.

APPLIOATION FILED DEO.16, 1903.

Patented January 24, 190 5.

PATENT OFFICE.

RICHARD LEWIS, OF RIVERDALE, MARYLAND.

CENTRIFUGAL SPEED-REGULATOR.

SPECIFICATION forming part of Letters Patent N0.'780,51l, dated January 24, 1905.

Application filed December 16, 1903. Serial No. 185,334.

To all whom it may concern."

Be it known that I, RICHARD H. LnwIs,a citizen of the United States, residing at Riverdale, in the county of Prince George and State of Maryland, have invented certain new and useful Improvements in Centrifugal Speed- Regulators, of which the following is a specification. l

This invention relates to speed-regulators comprised in the class of machine-brakes, and

pertains especially to a centrifugal speedcon trolling device.

The object of the invention is to provide a novel and peculiar construction and arrangement of parts in a device for regulating or controlling speed which shall quickly and positively coact with the element under its control, and thereby prevent lost motion of such element or of the parts of the device.

A further object of the invention is to pro vide a specially-arranged mechanism for controlling the movement of a sprocket-chain wheel whereby the speed of said wheel is governed and to devise a peculiar frame or hanger for mounting said wheel and mechanism together thereon, so that they may be suspended in operative position as desired without-separate adjustment thereof.

With these and various other objects in View the invention consists principally in loosely mounting apair of frictional blocks forming brake-shoes within a fixed housing to work about a housing-stud, a pinion loose upon the stud and having a flange provided with projections into the shoes to give them frictional bearing on the housing.

As far as known to me speed-controlling devices appertaining to this invention have brake-shoes working in a ring concentric to a shaft and between radial arms on the shaft,

the latter being provided with a governor, or the shoes are carried between two revoluble clutch-sections secured to a divided shaft and provided with a brake mechanism. It is therefore the purpose of this invention to vary such arrangement, and thereby overcome the objections and disadvantages found therein, to reduce the number of parts employed in them, to provide more direct and closer connections between the brake-shoes and the element they control, and to use certain of said connections as a means forholding the shoes and a flanged pinion in cooperative position.

In the, accompanying drawings, forming part of thisap'plication, Figure 1 is an elevation of the device applied as a fire-escape, partly broken away. Fig. 2 is a top or edge view of the device. Fig. 3 is an enlarged central longitudinal section partly broken away. Fig. 4 is a section on the line as m, Fig. 2. Fig. 5 is a detail perspective view of one of the shoes. Fig. 6 is a similar view showing a modification of the shoes.

The same numeral references denote the same parts throughout the several views of the drawings.

The speed-controlling device being devised especially to control the fall of a fire-escape chain, it is for purposes of exemplification shown. suspended from a window by a frame having a circular flange 1 projecting therefrom and forming'a housing, an arm 2, entending from the housing and pivoted to swing from a fixed bracket 3, a projection 4 from the housing opposite the arm2, a shaft-bearing lug 5 formed on the said projection, and

' The pair of friction-blocks which constitute the brake-shoes 12 have non-frictional faces 13, which incline, from each other to the peripheryof the shoes to permit their movement without contact with each other, and each shoe has a U-shaped cavity 14 at the juncture of the faces 13. This cavity extending only into the shoes and not through them strengthens the shoes at this point, increases their durability, and forms an uninterrupted shoe-bearing surface for the back or base of the housing. The back or base of the housing has a boss 15, in which the stud is secured and strengthens the housing at this point.

A pinion 16, having a flange 17 formed on or secured thereto, is loosely mounted on the stud 6 and held there by the gear-wheel 9 bearing against the conical outer face of the flange 17 and meshing with said pinion. Lugs or projections 19 on the flange 17 extend into the shoe-cavities to operate the shoes, and the flange 17 forms a revoluble cap or cover for the housing. By this arrangement the gearwheel 9 not only makes a direct and close connection between the sprocket-wheel and the controlling device, but said wheel constitutes the only means of holding the pinion upon the stud and the flange to the housing, said flange forming a revoluble cap or cover for the housing as well as the shoes and fully protecting the same.

Referring to the modification shown in Fig. 6, there is a U-shaped opening 18 through the shoe instead of the cavity hereinbefore referred to, so as to permit the use of longer flange projections, if desired.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a centrifugal speed-regulator, the combination with a fixed housing, a stud secured to the base of the housing and projeetingtherefrom through the face of the housing, of a pinion having a flange to cover said face and revoluble on the stud projection, a pair of friction-shoes having cavities, projections from the flange extending into the shoe-cavities, and a gear meshing with the pinion to operate it and to hold it on the stud.

2. In a centrifugal speed-regulator brake, the combination, with a non-revoluble housing, a stud fixed to and projecting from the housing, and a pinion upon the stud and having a flange, of a pair of brake-shoes loosely held within the housing by the flange, projections extending from the flange into the shoes to operate them, and a driving-gear meshing with the pinion and bearing on the said flange to hold the latter to the housing.

3. In a centrifugal speed-regulator brake. the combination, with a non-revoluble housing having an arm by which the housing is suspended, a stud projecting from the housing opposite the arm, and a shaft-bearing lug formed on the projection. of a pair of brakeshoes loose about the stud and bearing on the housing, a pinion loose upon the stud, a flange on the pinion,1n'ojections extending from the flange into the shoes,a shaft extending through the said bearing-lug, and a gear-wheel carried by the shaft to operate the pinion and to hold the flange to the housing.

4. A speed-regulator con'iprising a non-revoluble housing, a non-revoluble stud fixed centrally in the housing, a cap or cover for the housing revoluble upon the stud and having projections, a pair of brake-shoes loose within the housing and adapted to have said projections extend thereinto without extending through them, and a pinion carried by the cap or cover.

5. In a speed-regulator, the combination, with a fixed housing, a stud projecting from the back of the housing, and shoes loose in the housing and having cavities, of a cap or cover for the housing revoluble on the stud and having projections extending into the cavities to operate the shoes, a pinion carried by the cap or cover, and a gear-wheel meshing with the pinion and engaging said cap or cover to hold the latter to the housing and the pinion loose upon the stud.

6. In a speed-regulator, the combination, with a fixed housing having a central boss, a stud projecting from the boss, semicircular shoes making frictional contact with the inner periphery of the housing and having faces which incline from an opening or cavity so as to prevent the shoes from working against said boss and engaging each other or the stud, of a pinion having a flange forming a cap or cover for the housing, projections extending from the flange into said openings or cavities, and a gear-wheel meshing with the pinion and holding the latter and the flange loosely upon the stud.

7. The eombination,with a stud, a base-plate to which the stud is fixed and provided with a surrounding flange, and the brake-shoes, of a cap or cover revoluble on the stud and forming with said plate and flange a housing for the shoes, and projections extending from the cap or cover into the shoes to operate them.

In witness whereof I hereunto set my hand in thepresence of two witnesses.

RICHARD H. LE\Y.IS.

Witnesses:

C. F. BELT, C. T. BRIDE.

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