USRE14755E - Fbictioir-ci - Google Patents

Description

FLM. Norms. FBJCTlON CLUTCH,

AFPLIQATION HLED JULY 18| 1919.

Reissucd Nov. 18, 1919.

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UNITED sTATEs k vHENRY M. NORRIS, OF CINCINNATI, OHIO, ASSIGNOR T0 THE CINCINNATI IBICKFORD i, TOOL COMPANY, OF CINCINNATI, OHIO, A CORPORATON OF OHIO,

FRIcTIoN-CLUTCH.

led July 18, 1919.

To all whom t may concern:

Be it known thatA I, Hexa-r M. Noiuiis, a citizen of the United `tates, and residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented a new and Imroved Friction-Clutch, of which the folowing specification is a full disclosure.

My invention relates to *friction clutches of the class adapted to be used for driving or reversing the spindle of radial drills or for other suitable purposes and the objects of my improvements are to provide an adjustable fulcrum for the cam levers to coinpensate for the wear of the friction ring; to provide means for controlling the expansion of the :friction ring to a predetermined amount for preventing excessive strain or wear thereon; to provide a perfectly balanced clutch adapted forhigh speeds, and to provide simple and durable construction and assemblage of the various members for securing facility of operation and efficiency of action. These objects are attained in the following described manner as illustrated in the acci'mipanying drawings, in Whichz- Figure 1 is a. llong ,ritiidinal section of a friction clutch embodying my improvei ments; Fig. 2 a transverse section on the I' line a-a, of Fig.

. for the cam levers; Fig. 4 a perspectived 1;v Fig, 3 a plan of the sleeve with the actuating plunger therein view of said levers; and Fig. 5 a transverse section on the line 7i-b of Fig. 1, with parts broken away.

In the drawings, 1 nepresents a driving shaft formed with a longitudinal groove 2, 3 a sleeve splined thereon by means of key secured therein and slida'bly engaging at one end with said groove. Said sleeve is formed with a transverse notch 5 and with a longitudinal groove 6 terminating at its end therein. A stepped collar 7 formed with a. peripheral flange 8- and with a gap 9. in registration with the notch 5 is secured 1n rotative engagement with'sleeve 3 by means of the engagement of the other end of key 4 therewith and prevented from longitudinal movement by means of a set screw 10. A grooved collar 11 longitudinally movable 0n sleeve 3 by means of a hand lever not shown is secured to a plunger 12 which is thereb movable within groove 6.- Said plunger 1s Specification of Reissued Letters Patent. Reissued NOV, 8, 1919 dated .Tune 25, 1912, Serial No. lv77l5, led August 17, 1910. Application for reissue Serial No. 311,88

- i taper pin 14 adjustably threaded in the 55 stepped collar 7 adjustable ful- `criim for twin cam levers 15 which niova'bly engage near one end therewith and are extended through gap 9 and terminate aty the other end within notches 5 as` 2, and with their adjacent ,edges in registration with the opposite sides of `the point of plunger 12.

A split contractile friction ring 16 secured on the collar i' by means of a key nates in movable clamping engagement with the twin cam levers 15, as shown in Fig. A bevel gear 18 formed in its rear end with a counter bore 1f) and with a circular groove 21 in registration mounted idly on sleeve 3 with said counter bore loosely inclosing the friction ring il and with the annular wali 22 thereof in inovable'engagenient with the peripheral flange of collar shaft 23 journaled in bearings not shown is provided with a pinion. 2l in continuous engagement with gears 18.

n operation7 by means 4of thelsliding collar, the plunger may be moved in opposite directions with itstaper point between and beyond the corresponding twin cam levers for actuating said levers to expand the friction ring into frictional en-y gagement with the inside of wall 22 for 85 turning the gear 18 with the gear 24 for driving shaft 23. 'The'adjustn'ient ofthe taper pin longitudinally serves to cause the ,fam levers to take iipiiny wear on the fricionj ring that its frietional engagement With'90 the iwal] ofthe counter bore may be maintained constant during the contact of said levers with the parallel edges of the plunger regardless of the further movement thereof.

The clutch described the other side off`gear`24 if desired for driving the shaft ,23 in a reverse direction. The longitudinal adjustment of the sleeve 3 on shaft 1 permits shaft. 23 to be adjusted to different positions thereon for adapting it tof 100 drive the spindle in different adjusted positions on the arm of a radial drill.

Havin fully described `my improvements What I c aim as my invention and desire to shown in Fig.

1T ternii` 65 with the tapei'pins 14 is 70 7 as shown in Fig. 1. A driven 75 alternately may beduplicated at Secure by Letters Patent of the United. States is 1. In a friction clutch the combination with a Sha-ft formed with a spline groove, a sleeve slidable thereon and formed with a radial slot, a stepped collar encircling the sleeve and formed with a key seat, a key secured at one end in the key seat and terminating at the other end through the slot in the sleeve -and in slidable engagement with the spline groove, of a anged idle member on the sleeve concentric with the collar, a contracile friction ring secured to said collar, and lever mechanism for expanding said ring into frictional engagement with the idle member.

2. In a friction clutch the combination of a shaft, a sleeve splined thereon, a collar secured on the sleeve, a contractile ring secured on the collar, an idle member on the sleeve concentric with the collar` twin levers carried by the collar and engaging with the ring, and a. movable wedgel for simultaneously actuating the levers with the ring into frictional engagement with the idle member. l

3. In u friction clutch the combination of a shaft, a sleeve splined thereon and formed with a longitudinal groove, a collar secured on the sleeve, a contractile split ring secured thereon, twin levers carried by the collar engaging with the respective ends of the ring, a member mounted to turn on the sleeve concentric with the collar, and a taperedkey movable within the groove in the sleeve for actuating the levers simultaneously to expand the ring intofrictional engagement with the idle member.

4. .A reversing mechanism combining an elongated cylindrical sleeve; a spindle freely translatable therethrough and splined thereto so as to positively rotate therewith; 4

, enable -it to prfJ ject through the bore of each of said gears Without interfering with the free rotation of either of the gears journaled on said sleeve; and a collar freely shiftable on said sleeve between said gears and oper# atively connected to said bar to control the position of said bar; whereby either one or the other of said gears may be engaged by its respective clutch-means to act therethrough and rotate with said sleeve.

HENRY M. NGRRIS.

lWitnessesz' D. C. KLAusMEm, C. C. Smm.

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