US1290713A - Clutch. - Google Patents

Description

E. H. CARROLL.

y CLUTCH. APPLICATION FILED JUNE 24. I9I4.

1,290,71 3. Patented Jan. 7, 1919 y 3 sIIEETs-SHEET 1.

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CLUTCH.

APPLlcAlou FILED :uns 24. lsu.

'- Patented Jan. 7,1919.

3 SHEETS-SHEET 3 comprislng a driving and a driven member,

- 'y STATES PATENT OFFICE.: y

ELBERT H. CARROLL, orwoncEsTEn,MASSACHUSETTS, AssIGNon To MORGAN coN- STRUCTION COMPANY.,

0F WORCESTER, MASSACHUSETTS, A CORPORATION vOIF MASSACHUSETTS. CLUTCH.

1,290,719. i spehcmafionofteeersPatent, Patented Janv, 1919.

' .To all wlw/0m t may/concern:

Be it known. that I, ELBERT .CnRoLL, a citizen of the United States, residing at Worcester, in theco'unty of Worcester and I connection with the accompanying drawings, is a specification.

The p resent invention relates to a clutch,

and means for frictionally connecting said membersat will. In the embodiment thereof shown in the accompanying drawings,

and hereinafter described and claimed, my

invention is applied to a rotatable wire drawing block and serves -to connect the shell or winding surface of said block wi'th its driving mechanism. However, my invention is not limited to such a use, but 1s applicable to any and all uses wherein it is desired to transmit considerable A-power with the least possible shock to the mechanism in starting.

In the said drawings,

Figure 1 is acentral vert-ical sectional View of a wire drawing block embodying my invention.

Fig. 2 is a sectional view on line 2 2, Fig.

Fig. 3 is a sectional view on linel 33,

Fig. 1.`

Fig. 4 is a view similar to` Fig. 3, showing the operating parts in a different position, and

Fig. 5 is a view in elevation of the mechanism contained within the interior of the block, the shell being broken away to disclose vthe same.

. Like reference characters refer to like parts in the. different figures.

Referringto the. drawings. 1 denotes 'a driving shaft, suitably journaled in a fixed bearin 2,' and having secured to its lower end a ge tive movement, from a source of power, not

shown, isconstantly imparted to said shaft.

The bearing 2 of said shaft is preferably carried by the table or framework of the machine, and its upper end is adapted for the support of a substantially cup shaped member 4, forming an annular oil receptacle and having an inner annular overhanginglip or ange 5 which rests on the upper end Application mea :une 24', 1914. seriai no. 847,107.

vel gear 3, by meansof which rotaof said bearing. Near its upper end the said shaft 1 is squared, and a driving hub 6, having a central apertureA corresponding in shape and size to the crosssection of said shaft is slidably fitted thereon. A depending annular flange 7 of said lhub enters an annular recess 8 formed in the bottom of member 4 and rests upon an anti -friction Vring 9 lying in the bottom of said recess.

The hub 6 rotates with the shaft 1, and its rotation is adapted to be imparted to the Anormally stationary memberf4 and to the wire receiving surface .of vthe block by the mechanism about to be described. Theabove referred to construction, relatin .tol the sup` port of the wire drawin vblock y the bear- `ing 2, forms no part o the present invention, the same being described and claimed' in the Letters Patent of the United States issued to me February 29, 1916,1No. 1,173,707.-

The member 4 has an' outer upstanding annular rim 10, -provided at 'its base with a flange 11 which is adapted for the support of ashell 12, the periphery of which forms the winding surface of the block. The shell 12 has an internal recess 13 formed in its side wall,'within which fits a projection 14,

on the rim 10 of the member 4, whereby said member and' shell are connected together to rotate in unison. The shell 12 projects upwardly'in surrounding relation to the member 4` and hub 6, and is provided with apreferably integral cover section'15, spaced f surrounded by a depending boss 16, through which loosely extends the upper reduced portion of the shaft 1. A plate or disk 17,

guided by said boss and capable of sliding movement with respect thereto, is constrained to move downwardly thereon by av spring 18, surrounding said boss and housed within a recess 19 formed on the upper surface of said plate, against which the lower vend of said spring` bears. The plate 17 has above 'said member and hub and having a central opening formed therein which is" ianges are beveled, as shown, and constitute coperating conical frictional clutching surfaces adaptedto'be rendered operative by lowering the plate 17 so that said surfaces ing the rotation of the are brought into'contact. The spring 18 serves to press the flan e 20 into increasingly intimate contact with flange 21, effectwith the driving hub. The plate 17 is moved upwardly, against the force ,of spring 8, Y.

to disengage said clutchinglsurfaces posts 22, one of which is shown in Fig, 1,

- mechanism, such,

with an irregular raised `28 and spaced said posts projecting upwardly from a ring 23 through holes formed in bosses 24 formed. 'on the rim 10 of member 4. The ring 23v which surrounds the lower end of said meniber, is raised and lowered by operating arms 25, one of which is shown in Fig. 1, said arms being elevatedto release the clutching members by any suitable manually operated for example,as that shown Letters Patent of the and described `in 1,007,335, issued to me United States No. October 31, 1911.

A boss 26, formed on the interior of the rim 10 of member 4, has journaled therein a rocking stud. 27, which is provided on its upper end with a radial arm 28. The free.

ofsets of registering holes 33, by means v.of which the small end of a spiral spring vin .the interior of member flexible connection, mechan1sm,.not shown, on

' nected to the inner end of chain 40.

or band 35, pivotally connected to said links by a pin 34 inserted in4 said holes, may beadjusted with respect to said links. band 35 is wound loosely around the driving The hub 6, .with its convolutions superposed one upon the other, and its other end has an enlargement 36 which fits within a recess 37 The cover section 15 of the shell 12 has a curved upstanding rim 38 forming a shield, which is provided withan opening 39 through which a chain 40, or other suitable having a wire gripping its outer4 end, is drawn.- A swinging lever 41 is journaled on a stud 42 projecting from the cover section 15, with its free end adapted to be conr ttached to the lever between its free end and its pivotal point is a spring 43, which has its other end secured to a stud 44 on said cover section, tension to draw the line position,- Fig. 2, when the strain of the Wire upon the chain is relieved. The lever 41 is held in the full line positionshown in Fig. 2 by means of a der 47 in the edge of said lever. is pivoted on a pin 48, carried by an enplate 17 in unison spring-50, attached 'Fig 2, against the said spring exerting ay moves pas't lever 41 into the dotted latch 45 operating in the cover section 15 to engage .tshoullargement 49 extending upwardly from the riin 10 of member 4, and the latch is position to engage at one end to the latch vbetween its pivot and its free end, and .at the other end to a stud 51 on the plate 17.

The spring acts to retain a projection 52 on the inner edge of said latch against the periphery .of the -plate 17 The said. periphery has a depression 53 within which, inthe stationary condition ofthe mechanism, shown in Fig. 3, the projection 52 lies, thereby holding the free end of said latch 45 inwardly, in the path of the shoulder 47. Rotation' of the plate 17 in the direction of arrowA, Fig. 3', causes the,l

free endy .of the latch to move outwardly,

when said projection 52 rides upon the circular portion of the periphery of the plate.

In operation, with the parts in the positions shown in Figs. 2 and `3, the latch'45 holds the lever 41 in the full lineposition,

the flexible connection 40 extended beyond said shield to provide for the attaching of the wire thereto. When this is accomplished, the rotation of the mechanism is started by thewithdrawal of the posts 22 from the' support of plate 17, permitting the beveled face of the flange 20` of said plate to make frictional contact with the correspondingly beveled face on.the flange 21 of the rotating driving hub 6, under the pressure aof' spring 18. The'initial vrotation of the plate 17 in the direction of arrow A, Fig. 3, as a consequence of the supplemental frictional clutching action, above described, moves the end of latch 45 outwardly. This movement allows the'flexible connection 40 to be withdrawnA immediately within the rim 38 by the spring 43,- in case the the attendant, due to swinging of said connection by centrifugal force in the rotation of the block. During the movement of the plate 17 to effect the above described release of the 'lever 41 from the latch 45, the travel `bf the end of said arm 28 along the raised cam track 29 is not sufficient to cause any appreciable movement of said arm, owing to the substantially radial disposition of the inner portion of said track, indicated at 54, Figs. 3 and 4, which the free end of the arm during this time. Further rotation of said plate, however, brings the main section'of the cam track 29.against the end of said arm, with the result that the 'arm is forced outwardly, effecting the rocking of stud 27 to carry through an opening 46 j n held in, the shoulder 47 by a force of spring 43, with lto the wire drawing block, through themedium of band 35, which'is drawn tight upon the driving hub 6 by power furnished z by the machine. The power necessary to so tighten the band 35 is transmitted by vmeans of the supplemental friction produced betweenthe driving hub 6 and the plate 17; and by the arrangement of the cam track 29 and arm 28, they force which is thus transmitted by the friction clutch between the hub 6v and plate. 17 is greatly multiplied in order to insure the appllcation of ample force to tighten the band 35.

In other words, the plate 17 is caused to rotate through a'considerable are to effect a very small movement ofthe small end'. of said band, and it will be apparent that the multiplying effect, abovedescribed, may be varied at will by changing the contour of cam track 29 and the relative proportions of arms 28 and' 30.

During the drawing operation, the shaft 1,'mem'ber 4 and shel1 12 rotate in unison, with theend of arm 28 bearing' against cam track 29, in a position farther or nearer the inner end of said track as determined by the tension of the wire in opposition to the rotation of the shell. When the drawing operation. is completed, or when it isL -desired to stop the mechanism, the plate 17v is raised `by elevation of the ring 23, thereby eliminating the supplemental friction produced between the hub -6 and said plate. The operative connection between' the hub 6 and the shell 12 is thereby destroyed and the rotation of said shell comes to an end because the elastic band 35 becomes loosened l on said hub due to the resilience of the elastic band 35. The' plate 17 is drawnback into the position shown in Fig. 3, under the influence of the spring 50, causing .the end of arm 28 to assume its former position on the portion 54vof the track and effecting the inward movement of latch 45" to hold the lever 41 in itsfull lineposition, Fig. 2. In order to prevent too: great a recoil of the plate 17, a-raised lportion 55 is provided and is adapted to Contact with the arm 28 and to guide it into contact with theyportion 54 of trackl29, in readiness to move thereon when the clutchingmechanism is again rendered operative. The return of the plate 17 to the position-shown in Fig. 3 again causes the latch 45 to be interposed in the path of lever 41, whereby the latter is held in the full line position Fig. 2,-in-

readiness for the attachment of the end o1" the wire to the flexible connection 40. p

I claim, 0 1.l A clutch having.l driving and driven members, an elastic band surrounding said driving member and having one end operatively connected' with the driven member, means connected with the other end of said band for tighteningthe band around the driving member, a'movable member, and a camA carried by said movable member for actuating said tightening means.

2. A clutch having driving and driven membersan elastic band spirally surrounding said driving member, and operatlvely connected with the driven member, a movable member, means for forcing said mov-v able member into' frictional engagement with said driving member, an oscillating `stud supported by the driven member, le-

versof unequal length attached to said stud, with the shorter of said levers one end of said elastic band,and a cam vcarried by said movable member for actuating Athe longer V of said levers to draw said elastic band into frictional contact with the driving'member. -v

3. A clutch having driving and driven members, a member movable into frictional engagement with said`driving member, an elastic band -surrounding said driving member and having one end operatively connected with said driven member, a rocking stud carryingtwo arms of unequallength, an

adjustable connection between the'opposite.

end of said elastic band and the shorter of said arms, and a cam carried by said movable member in contact 'with said longer arm. l

4. A'clut-ch having driving and driven members, a member movable into frictional engagement with said driving member, an elastic band surrounding said dri-ving member having one end in operative connection with the driven member, arocking stud carried by the driven memberand having two radial arms, with one of said arms attached to the opposite end of said elastic band, a cam carried by said movable member and actuating said second radial arm to tighten said elastic bandl on the driving member.

5.A clutch having driving and driven members, a band surrounding-said driving member and attached at one end to said driven member, a member movable into engagement with said driving member to rotate therewith, said member having a cam surface thereon, and a 'rocker arm carried by said driven member and operatively conso j attached to l0 y actuate said swinging arm, and a Stcp 'connected with the driven member, a mem- 5 'ber movable into frictional engagement with said driving member, a swinging arm supported lby the driven member' and operativtly connected with said elastic band to tighten the same-0n the driving member, a cam carried by said movable member to to limit the movement of said arm in one direc# tion.

. In a clutch of the class described, a driving and a driven member, an elastic band encircling said driving member and having` one end operatively connected with said driven member, a swinging arm sup` ported by the driven member and operatively connected .with the opposite end of said elastic band, a member movable into' frictional engagement with said driving member, -a cam carried by said movable an initial section radially movable member.

Dated this 22nd day of June, 1914.

Witnesses:

WILLARD A. WINN, PAULINE W. '13. HAAs.

ELBERT yH. CARROLL.- g n

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