US1319465A - Clutch - Google Patents

Description

E. S. FAIRBANKS.

CLUTCH.

APPLICATION FILED JUNE 21. 191B.

,3 1 9,46 5., Patent-ed Oct. 21, 1919.

' 2 SHEEi'S-SHEETI.

' E. s. FAIRBANKS.

CLUTCH.

APPLICATION FILED JUNE 21.1918.

Patented Oct. 21, .1919.

2 SHEETSSHEET 2.

m m UNN. -UH- 9m I Ewen/$07 Ewwai'ifiziwn/m ERNEST S. FAIRBANKS, 0F GREENFIELID,

'rR ssi nsTEEL 00., 0F PHILADELPHIA,

jsynvaiv a.

Application filed-June 21, 1915.

To all whom it may concern:

. Be it known that I, ERNEST S. FAIRBANKS, aecitizen of the United States, residing in Greenfield, Franklin coimty, Massachusetts, have invented certain Improvements in Clutches, of which the following is a speciiication.

My invention relates to friction clutches of the typecomprising a contractileand expansible ring disposed inside the rim of a loose pulley, which ring is adapted through suitable means to be placed in engagement with such pulley so that the latter will rotate with the shaft carrying the contractile and expansible ring.

1 My present inventionis in the nature of improvements upon the structure disclosed in my Patent 1,186,301, June 6, 1916;-and the object of my present invention is .to in- 'creasethe amount of contact between the ring and the surface of the pulley whereby .a greater elliciency inoperation maybe secured, and on the other hand nsurlnglevenness .of wear.

A further object of nay invention is to provide means whereby the ring constitutes a substantially floating member free to engage the walls of the pulley at substantially the same pressure at all points.

A further feature of my invention is to provide astructure that may be readily applied to line shafting already set up, or to any other type of shafting when the latter is installed.

These and other features of my invention are more fully described hereinafter, reference being had to the accompanyingdravw ings, in which:

Figure 1, is a face view of my improved clutch.

Fig. 2, is a sectional view on the line IIII, Fig. 1.

Fig. 3, is a view similar to Fig. 1, illustrating a modified arrangement within the scope oflmy invention, and

Figs. #1 and 5, areviews similar to Figs. 1 and 2, illustrating a further modification within the scope of my invention.

i In the drawin s 1 re resents a lineor counter-shaft, having a pulley 2 loose thereon; and3 representsa hub keyed or other- Wise secured to and rotating with the shaft 1. Disposed within the rim of the pulley and mounted so as to be out of contact there- Specification of Letters Patent.

pulley flange,

ivmzsseo rnsnrrs, ASSIGNOR To STANDARD PENNSYLVANIA, A CORPORATION or PENN- CLUTCH.

Patented Oct. 21, 1919. ;Serial No. 241,177.

with when not in action, is a ring l forming the clutching member; which ring is operatlvely connected to the hub 3 and is provided with means hereinafter described whereby it may be expanded into engagement with the flange 5 of the pulley.

The hub carries a lever 6 disposed between suitable ear pieces 6" and pivotally mounted 011a pin 6' carried by said ear pieces, and such lever coacts with a conical sliding collar 6 ofa typecommonly employed as the actuating device of clutches.

Carried by the ring is a yoke-shaped member 7 connected tothe ring 7, and having arms 7 which,,in the form of structure illustrated in Figs. 1 and 2, are disposed opposite apertured projections 8 carried by the Vberbypins 10; :the opposite ends of said pins 9 having heads or washers 11 in engagenient with springs 12 which are preferably-disposed in .sockets 13 'formed in the apertured members 8. These springs, when the ring is expanded into contact with the are under tension, and when the'ring is released they serve to holdthe same out of contact with said pulley flange. Oppositely disposed with respect to the yoke member 7 is a yoke member 15 having arms 16; the endsof which are connected at 17 to links 18, whose opposite ends are secured at 19 to the free ends of the ring.

"The arms'of the yoke 15 are preferably reduced in thickness so as to render them resilient and deflectable one relatively to the other and both relatively to their connecting portion 20 which is engaged by the lever '6 for operating the clutch ring ithrough coaction-with the eonically sliding collar 6. In the structure illustrated in Fig. 3, the

hub is split'andconnected together by bolts similar to the structure illustrated in Figs.

1 and 2, excepting that their relation is re versed, and the springs are adapted to sockets in said yoke .member.

In order to take up wear which may occur upon the inner surface of the pulley or the outer surface of the split ring, in the form' "the split ring.

1, 2 and 3.

ring, hub and yoke member 7, shown in Figs. 1, 2

- sary,to cut the connection and hub, and the space clutch ring,

hub, ing drawings, is such that the structure proof structure shown in Figs. 1,2 and 3 the yoke member 15 is provided with a screw 22 having threaded engagement with one of the arms 16 and having its end arranged to crowd or bear against the other arm 16 so that after such wear occurring between the engaging surfaces of the clutch rin and pulley flange, inward movement 0 said screw will increase the separation of the arms of the yoke member and thereby increase the normal diameter of the split ring.

In Figs. 4 and 5, I have shown a further modification .in which the connection between the clutch hub and the clutch ring is slightly different from the structures illustrated in Figs. 1, 2 and 3. In the structure shown in Figs. 4: and 5, a single post connection is employed; the clutch ring carry- 0 a projection or boss 25 recessed to re- 111 cei ve the head of'a bolt 9 which is pinned at 10 to the hub, with a spring 12 interposed between the head of'said bolt and the socket or recess 13 in the boss carried by The free ends of the split ringareconnected together by an element 15 withinterposed links 18*, and said member has a split portion'with a conical seat 26 for the reception of a conical sleeve 27'; a screw28 being employed todraw up said sleeve so as to regulate. the extent of opening of the split portion. of the yoke member 15. in'order that proper positioning of the flange of In other respects, the Figs. 4: and 5, is substantially like the structure shown in Figs. If desired, a roller bearing may be employed with the pulley; the same being inclosed within a. case 29.

' In manufacturing the improved structure forming the subject of my invention, the of the form and 3, as well as the boss. hub and ring of the structure shown in Figs. .4 and 5, are preferably cast in one piece. For operative purposes, it is necesbetween the yoke formed by such cutting operation is 'filled in with washers 30, as illustrated in the several views. addition, the part illustrated by dotted lines in Fig. 3, and preferably cast with the fore the ring isfinished for application to the pulley. V 7

It will be'understood, therefore, that the several forms of spring-supported connec tionsbetween the clutch ring proper and the and as illustrated in the accompanyvides what may be termed a floating clutch ring; positive in its action, and engaging substantially the entire surface of the flange of the pulley flange of I the same,

is subsequently broken out beand one that is capable of being readily thrown out of action so as to be supported by its hub entirely clear ofsuch pulley surface.

It will be understood, of course, that.

wish to be limited to the constructions disprojection diametrically opposite the split portion of the same, a hub, and a resilient connection between the lateral projection of the split ring and saidhub. V

2. In a clutch, the combination ofza pulley, split ring for engagement withone means forexpanding said split ring; said projection diametrically opposite the split portion of the same, a hub, a resilient consaid split ring and the'hub, and a resilient -0r flexible connection betweenthe free ends he combination of a puling the free ends of the ring, a hub, means carried thereby for expanding said split r ng, a lateral projection carried by saidringopposlte the split portion thereof, and

a spring connection between said projection and the hub and member,

5. In a clutch, the combination of a pulley, a split ring for engagement with a flange of the same, a hub, a tension member,

disposed opposite said yoke links connecting said tension member with the free ends of the split ring, a lever pivotally connected to, the hub and adapted to engage said tension member to expand the split ring, a lateral projection carried by saidring opposite the split portion thereof,

anda resilient connection between said proect on and the hub.

6. In a clutch, the combination of 'a pul-' for engagement with one split portion thereof, and

closed; desiring to claim broadly any conring having a lateral election.hetween'the lateral projection of ley, a split ring for engagement with a flange of the same, a tension member, links connecting said tension member with the free ends of the split ring, a split hub, means connecting the same together, a lever pivotally connected to one portion of the hub and adapted to engage said tension member to expand the split ring, a lateral projection carried by said ring opposite the split portion thereof, and a resilient connection between said projection and the hub.

7. In a clutch, the combination of a pulley, a split ring for engagement with a flange of the same, a hub, a tension member, links connecting said tension member with the free ends of the split ring, a lever pivotally connected to the hub and adapted to engage said tension member to expand the split ring and projecting laterally beyond the plane of the pulley, a yoke member car ried by the ring, and springs connecting said yoke member and the hub.

8. The combination, in a friction clutch, of a shaft having a loose pulley thereon, a hub fixed on the shaft adjacent the pulley, a split clutch ring positioned inside the pulley rim, a lever pivoted to said hub, resilient or flexible means connecting the free ends of the split ring including a yoke mem- Gopies of this patent may be obtained for her in operative engagement with said lever, means for adjusting the position of the arms of said yoke member with respect to each other, a yoke arm connected to the ring opposite said yoke member; said yoke arm projecting laterally at the side of the clutch ring outside the plane of the pulley flange, and a flexible connection between said laterally projecting yoke arm and the hub.

9. The combination, in a friction clutch, of a shaft having a loose pulley thereon, a hub fixed on the shaft adjacent the pulley, a split clutch ring positioned inside the pulley rim, a lever pivoted to said hub, a pair of toggle links connected to the free ends of the split ring, a yoke member connected to said toggle links and in operative engagement with said lever, means for adjusting the position of the arms of said yoke memher with respect to each other, a laterally projecting yoke arm connected to the ring opposite said yoke member, a bolt connecting said projectingyoke arm with the hub, and a spring in operative engagement with said bolt and forming a flexible connection between said projecting yoke arm and the hub.

ERNEST 'S. FAIRBANKS.

five cents each, by addressing the Commissioner of Patents, Washington, D. G.

Images