US806000A - Frictional clutch. - Google Patents

Description

' PATENT-ED NOV. 28, 1905.

J. RIBPPEL. FRIGTIONAL CLUTCH.

APPLICATION FILED AUG.11,1904.

2 SHEETS-SHEET 1.

HHOINCE "ma omooo. PATENTED NOV. 28, 1905.

J. RIEPPEL.

. PRIGTIONAL CLUTCH. 1 APPLICATION IILBD AUG. 11, 1904.

2 SHEETS-SHEET 2.

Invenpr Wings:

UNI E ST ES rA ENT OFFICE JOHN RIEPPEL, OF COWANESQUE, PENNSYLVANIA.

FRlCTlONAL CLUTCH.

Specification of Letters Patent.

Patented. Nov. 28, 1905'.

Application filed August 11, 1904. Serial No- 220,393.

To all whom it may concern:

Be it known that I, J 01in RIEPPEL, of (Iowanesque,in the county of Tiog a and State of Pennsylvania, have invented certain new and useful Improvements in Frictional Clutches; and I do hereby 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.

The object of this invention is to provide improvements in that class of friction-clutches whose parts are so constructed and arranged that the binding of the friction-shoes is effected by the swinging of the latter outwardly from a common point by means which will firmly hold them in their adjusted positions and which will allow them to readily return .to their normal positions upon the release of a 7 pressure.

A further object is to provide improved means for readily compensating for wear without the necessity of dismantling theparts.

The invention will be hereinafter fully set line 7 7, Fig. 6.

Referring to the drawings, 1 designates the shaft, and 2 a band wheel or pulley which is shown as having a ring or flange 3 secured to its spokes, but of considerably less diameter than the pulley. Upon the shaft is fitted a sleeve 4, whereon the pulley is held loosely by a fixed collar 5. Upon this sleeve is secured a cross-piece 6, forming two lateral arms, upon each of the ends of which are pivoted the ends through which is passed a pivot-rod 9. One

sleevein its adjusted position. (See Fig. 3.) The flange of the other shoe is formed with an irregular orcam-like-surface 14:, designed to conform to a correspondingly-formed surface on the inner end of an adj usting-arm 15, pivoted on rod 9 between the contiguous ends of the adjacent pairs of shoes. These arms at their pivot ends on the sides opposite to those formed vwith the cam or irregular surfaces are flat, was to fit flush against the flanged ends of sleeves 10. The pivoted ends of the shoes are formed with openings to accommodate nutted rods or bolts 16, extending outwardly from the two lateral arms-.. At their outer ends the shoeactuating arms 15 are pivotally connected by links 17 to a collar 18, movable longitudinally of shaft 1, such collar carrying in its peripheral groove a split ring 19, to which a shifting-lever (not shown) may be connected. To maintain this adjusting-collar in proper position and guard against any lateral strain on the adjusting-arms, I form such collar with an apertured flange 20 to accommodate a guide bolt or rod 21, extending outwardly from the cross-piece 6.

22 designates springs mounted on each of the pivot-rods 9, which springs are compressed when the arms are turned to force the shoes outwardly into engagement with the ring or flange and the tendency of which is to immediately withdraw the shoes from frictional engagement with the ring or flange once the pressure of the cam ends of the adjustingarms is released.

In practice the shoes are normally out of frictional engagement with the ring or flange of the clutch-pulley. When it is desired to actuate the clutch, the collar 18 is moved outwardly, so asto turn the adjusting-arms on their pivots. These arms by reason of the cam-surfaces on their inner ends force the adjacent ends of the two pairs of shoes outwardly, such shoes swinging or turning on their pivots, so that the contact is had with the ring or flange under the radial movements of the shoes- In this way the clutching is readily and easily effected and all danger of slipping is avoided. As soon as the collar 18 is moved inwardly the springs 22 at once cause the free ends of the two pairs of shoes to move toward each other, and thus release the bite or hold on the ring or flange. As the cam-surfaces wear, and likewise to compensate for the wear of the engaging surfaces of the. shoes, the sleeves 10 are readily turned so as to always secure a snug fit between the LOO flanges 8 of the shoes and the pivot ends of the adjusting-arms.

Although I have specified a ring or flange secured to the spokes of a pulley, it is obvious that the shoes may engage directly with the pulley-rim, the latter serving the same purpose as thefriction-ring 3. It is also manifest that any number of pairs of clutch-shoes may be employed. In some instances I have used three pairs and in others four pairs. Then, again, in small pulleys I have used but a single pair, as shown in Figs. 6 and 7, in which instance but one lateral arm is necessary, the cross-piece being then extended in but one direction. In this arrangement I have shown the apertured flanges for the pivotrods 9 as extended outwardly instead of inwardly, as in the other instances. Other changes and modifications may be made and still be within the scope of my invention.

The advantages of my invention are apparent and will be readily appreciated by those skilled in the art.

I claim as my invention- 1. The combination with the shoes pivoted each at one end and free at the other, said shoes having at their free ends angularl-y-extended flanges, one flange of adjacent shoes having a cam-surface, the other flange having clamping-jaws, a sleeve adjustably held by said jaws, a pivot-rod passed through said former flange and said sleeve, an adjustingarm mounted on said pivot-rod having on one side a cam-surface to engage the corresponding surface of one of the flanges, its other side engaging the face of said adjustable sleeve, and

means for actuating said arm.

2. The combination with the shoes pivoted each at one end and free at the other, said shoes having at their free ends angularly-extended flanges, rods passed through said flanges, adjusting-arms mounted on said rods intermediate said flanges, means for actuating the arms, means for forcing said shoes outwardly as the arms are moved in one direction, and springs encircling said rods for returning said shoes to their normal positions when relieved of the pressure of said arms.

3. The combination with the sleeve and the lateral arms, of the shoes arranged in pairs, the shoes of each pair being pivoted at adjacent ends to said arms, said shoes at their outer ends having angularly-extended flanges, the flange of one shoe having a cam-like surface, an adjustable flanged sleeve fitted in the flange of the other shoe, rods passed through adjacent flanges, springs on said rods, ad justing-arms mounted on said rods having each on one side a cam-like surface for coaeting with the corresponding surface of the adjacent flange, an endwise-movable sleeve, and links connecting the latter to the outer ends of said arms.

4. The combination with the cross-piece forming lateral arms, of the clutch-shoes arranged in pairs, the shoes of each pair being pivoted to said cross-piece, adjusting-arms fitted between the free ends of adjacent shoes for forcing the latter outwardly, a longitudinally-movable sleeve to which said adjustingarms are connected, and a guide extended outwardly from said cross-piece, said collar having an apertured flange to accommodate said guide.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

JOHN RIEPPEL.

Witnesses:

GEORGE M. RIEPPEL, JOHN RIEPPEL, Jr.

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