US42525A - James s - Google Patents

Description

'attainable by JAMEs'sDnowN, l o r LUoIAN sun-arnet* PROVIDENCE, RHODE ISLAND. l A

or In-iwaUcKi-ifr, Assio'non To Josnrn'n; snows AND lMPnovEs/IENT 1|- Florien-morenas.

Specification forming part of Lettera Patent No'. d 2,525,1datedApril 1864. Y

To all whom it'may concern-" Be itI known' that yI, JAMES S. BROWN, of

Pawtucket, in the county of Providence and.

State of Rhode Island, have invented a new and useful improvement'in the frictionclutch for. connecting and disconnecting a loose pulley with or from its shaft or axle and for other purposes t and I do hereby declare that thefollowing is a frh-clear, and'exact' description of the same, reference'being had to the accompanying drawings, making part of. this speciiicatiomin whicht Figure lis a transverse section of my improved friction-clutch and pulley, arranged in proper forni on a shaft, B. Fig. 2 isa view of the interior' face of the segment-plate D, Fig.

sponding parts in all the iigures. My'improvement consists in a peculiar ar` rangement of the levers and 'segmentsofa' rietion-cluteh, whereby `the construction is greatly simplified and rendered more substantial, and a. more direct and forcible pressure against the friction-surface, and consequently.

a greater olu,l nhing force, is obtained than is iifterently-arran ged frictionclutches hereton` erknown and'used.

To enable others skilled in the art to make and use myvinvention, l will proceed to describe the same.

"-- In the accompany-'ingdrawings B is a shaft and P-is a pulley thereon, having a suitable lengthof hub to give it steadiness upon the shaft, and 'having the rimY P formed almost wholly upon one side of the'plate or arms m,

the interior circular surface of which' (rim) is turned to a smooth bearing for the clutching device, which consists of two segments, E E, of form as shown in Figs. 1, 2, 'and 4, sliding freely inthe guides U C, formedin the segment-plate D, Figs. 2 and 3, by means of two straight levers, G G, Figs'. l, 6, and l', swinging upon two fulcrum-pins, d d, in the lugs g g of the segment-plate, and passing through and exerting their force against the edge of the openings l l,in sliding plates ofthe segments E E, at a point on the levers near" the i'ulcrum-pins, by motion and power appliedto the'opposite ends ofthe said levers through the medium of the sliding wedge-collar F upon theshaft. .The said segments E are connected by means of two spiralsprings, s s, attached to books t t upon each side thereof, as shown -inFg. 2, in order todraw each segment toward the center and from contact with the inner surface of the wheel-rim 'at the proper time. A set-screw, it, is inserted in the long* arm of the levers G to adjust'and regulate the sliding' movement of thetwo segments and their consequent pressure against the frictionsurface on the wheel-rim, the wedge'collaroperatingA against the heads of such set-screws.

The pulley P, as represented, -is intended to turn freely on the shaft B and is held Ain its position under suchcircumstances by the iixed collarr on one side and .the segmentplate D made fastto the shaft by the set- -screw la., through its hub, as seen in Fig. 3,

upon the other' side, whereby the parts composing the' clutch are secured tol and revolve Vwith the shaft. y

The wedge collar F is formed with two 'wedges or conical ends to operate a. frictionclutch upon both sides and with a deep score, j, in the middle for the reception of the forked shipper, which is generally used .to slide iteither way upon the shaft.

When the cone or circular wedge is slid between the set-screws z'z' in the ends of the levers G the segments E are pressed from the center directly against the under side ofthe wheel-rim, and when the said cone or wedge is slid from between the said set-screws they reaction ofthe springs s s withdraws. the seg-l ments from contact with the rim of the wheel,

fitted` up with Vthe 'commonest tools by any ordinary machinest.

It will also be seen that the segments have l a. direct action and pressure at rightangles with the shaft against thc under surface of ;"the wheel-rim, whereby any wear upon the friction-surface of said segments is calculated l I am aware also that a similar wedge-collar to tit the same more closelyand perfectly to the surface of the wheel-rim, and thus te insure a more perfect and forcible clutching action than can possibly' be attained by an obliquel or other, movement of the said segments that is less direct; and itwill be seen that the arrangement of the levers G with the segments is such that a sufficient sliding movement is imparted to the-'said segments from a. point on the lever at about a quarter of the distance ot' its length from the t'ulcrnnrpin (l, so that the power exerted upon the long arm ot' the segments, which chiefly distinguishes my iu- \ention from other arrangen'lents which have been heretofore employed for this purpose."

I am aware that similar segments, counected byvtoggles with a sliding sleeve and snrroumleder encompassed by au endless .spiral spring to withdraw the segu'lents from eontact with the \vheelrim, have been previously patented by Vendell Wright, June 15, lt`52, and I would not, therefore, be understood as elaiming the segments when so arranged.

for operating two levers or clamps to' clutch the Vedge of a disk'or ycollar has been previously `patented by- Francis A. Pratt, Sep tember 4, 1860, and I would not, therefore, be understood as claiming` such wedge-collar or the arrangement of parts therein set forth.'

I am aware, too, that the said wedge-collar, in combination with two angular levers, the action ot which is adapted to the rimA et' the pulley, has been previously patented by the said Francis A. Pratt, November 26, 1861, and I would not, therefore, be understood as claiming such combination, as neither this or the other arrangements ofthe saidPratt and Wright, above referred to, are eapableot' produein g the desirable results herein described as peculiar to my improved arrangement.

Having thus .described my invention, what I claim, and desire to secure by Letters Pat ent, is-

The combination and arrangement of the segments ll E,the segment-plate D, and levers GG, with the Wedge-eollar F and pulley P, substantially as described, for the purpose specified. l

.IA-nies s. BROWN.

Witnesses:

Unas. A. WARLAND, Tiros'. K. KING."

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