US1136891A - Dial mechanism. - Google Patents

Description

z. PICANDEE.

DIAL MECHANISM.

APPLICATION FILED JUNE I i914.

. .Patented Apr. 2o, 1915. l

3 SHEETS-SHEET 1.

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DIAL MECHANISM. APPL'lcATloN man JUNE 1. 1914.

Patented Apr. 20, 1915.

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z.P.cANnEE. DIAL MECHANISM.

APPLICATION FILE'D JUNE 1| |914.

1,136,891 Patetea Apr. 2o, 1915.

3 SHEETS-SHEET 3.

ZENAS iP. CANDEE, WATERBURY, CONNECTICUT, ASSIG'NOR TO lIH-E WATAERBURY FARREL FOUNDRY AND MACHINE COMPANY, or

CORPORATION OEF CONNECTICUT.

WATERBURY, CONNECTICUT, A

DIAL MECHNISM.

Specification of Letters Patent.

Patented Apr. 20, 1915.

'Application filed June 1, 1914. Sera1No.-`8512,'2`39.

To all lwhom it may concern.'

Be it known that' I, ZENAS P. CANDEE, a citizen of the United States, residing at Waterbury, in the county of New Haven and State of Connecticut, have invented certain new and useful Improvements in Dial Mechanism, of which the following .is a specification, reference being had therein to the accompanying draw-ings.

This invention relates to a new and improved dial mechanism. It is illustrated in the drawings as applied to a press, but its use is not limited thereto, as it maybe applied to a dial of any kind, or used with any other type of machine.

It is the object of this invention, among other things, to provide a simple and easy moving mechanism that will operate the dial positively, with the minimum of wear upon the parts, and lock the'same against movement at predetermined periods.

To these, and other ends, this invention consists 1n the dial mechanism, having certain details of construction, and lcombinations of parts, as will be hereinafter described, and more-'particularly pointed out in the claims.

Referring to the drawings, in which like numerals of reference designate like parts in the several figures; Figure 1 is a view of my improved mechanism as attached to a press, a portion thereof being shown; Fig. 2 is a front elevation of the parts shown in Fig. l; Fig. 3 is a view of the dial actuating mechanism, looking toward the rear yof the press; Fig. 4 is a sectional view of the dial with its adjacent parts, taken upon line A-B of Fig. l; Fig. 5 is a view of a portion of a modified form of mechanismk embodying my invention; and Fig. 6 is an elevation of the pawl and adjacent mechanism, shown in Fig. 5.

This invention may be applied to any form of mechanism wherein 4a rotary dial is requisite, but as herein shown, it is applied toa press of the ordinary typ-e, having a reciprocating gate.

It is'the practice to operate a rotary dialy from a moving pawl connected with a member having an endwise movement in a straight path, and lock the same against movement at predetermined periods by a lockingpawl, or similar mechanism, that maintains a permanent Contact with the pemovement.

causes both the .pawl and dial notch to become worn, and in time results in a defective and uncertain movement of 'the dial and the substitution of 'a new pawl and dial. 'lfhe locking pawl dragging against fthe periphery of 'thev dial, usually under pressure, is an added cause for unusual wear upon the periphery of lthe dial, which is accentuated if 'the locking pawl is considerably h'arder than the dial; and again, the

-pawl, as 4ift is forced intothe vnotch, wears oft' the sharp corners of the notch, 4causing them to become rounded in a comparatively short time, and :assisting with the moving pawl to so enlarge them as to -entirely ruin the dial. i

It will be observed that both the moving pawl and locking Apawl have ya constantly deteriora-ting eifect upon the dial, so that the same in practice is comparatively shortlived. In my invention I have overcome these and other objections by providing an. operating vvpawl that, is Amoved about the center of the dial, and during its entire contafct therewith has no relative movement, hence there is 'no wear upon either the -dial or the p'awl, fand the locking -pawl is so 'designed and operated that it does not bear against the periphery of the dial, but moves into '-tlie notch-Without dragging 4over 'the corners thereof. All of this mechanism is so designed and 2arranged that none of its parts interfere with the punch and die mechanism, which may be inserted in, or removed from, the press without disarranging any portion of the dial mechanism.

Referring to the drawings, the numeral 1 designates the bed of a power press, 2 the uprighits usually made integral therewith, and 3 a punch 'that is fixed in a gate (not shown), haviiig 'a reciprocatory movement toward'and -away from the bed l. This mechanism is Vwell known in the art and constitutes no part of my resent invention.l

Secured to 'the press d 1 is a dial bed 4,

having a bushing 6 therein held against rotation by the dowel 7. Rotatable about the upper end of said bushing 1s the dial 5, which rests upon the dial bed 4, and rotatable about the lower end is a pawl-arm 8.

The dial 5 is provided with the usual peripheral notches 16 and the openings 17 therethrough to carry the articles mto line with the punch and die.

A washer 10 secured against rotation by the dowel 9 rests upon the dial 5, and is engaged by the friction disk 11 that surrounds the stud 12 held lagainst rotation within the dial bed -4. This stud extends through the bushing 6, and threaded thereon are the nuts 13 and-14, the former of which bears against the friction disk 11,

and between the latter and the bushing 6 is a coil spring 15. t

By the mechanism just described both the pawl arm 8 and dial 5 are held with independently variable friction, the former through the medium of the coil spring 015 and nut 14, and the latter through the friction disk 11 and nut 13. Only a very limited friction is required upon the dial 5. Its weight would be sufficient in most cases, but to insure an operation positive beyond all doubt, only a limited variable friction is applied thereto, which, however, may be materially increased through manipulation of the nut 13.y

Connected with the pawl arm 8 upon the pin 18 isl the pawl 19, having a tooth 20 upon its'outer end of substantially the same shape asthe notches 16, and an arm 21, to

. which the swivel block 22 is connected by j the pintle 23.

Upon one side of the bed 1 is a journal bearing 24, within which is rotarily mounted a shaft 25, having a cam 26 thereon that rotates in a path substantially parallel with that `of the dial 5. Within said journal bearing isa. fixed stud 27, upon which is mounted a rock lever 28 vhaving a spring arm 32, a connection arm 30 having a slot 31 therein, and a cam roll 29 rotatable therein that contacts with the periphery of the cam 26.

The dial driving lever 33 is pivotally connected with the bed 1 bythe stud 34, and is provided with a slot 35 therein, into which projects a roll 36 upon the stud'37 that is fixed to the arm 30 of the rock lever 28 by the nut 33, said stud passing through the slot 31. By this form of connection between the rock arm 28 and dial driving lever 33,

means are provided for varying the length of movement of said driving lever and thereby provide adjustment of movement'to the pawl 19, with which it is connected through a connection comprising a link 39 pivotally joined with the driving lever 33 by the pin- 'tle 40, and the rod 41 that is threaded into the and passes through the swivel` block 22, with a jam nut 42 thereon that bears against the link 3 9, and nuts 43 and 44 thereon upon opposite sides of the swivel block 22. A sprin 45, between the nut 43 and said swivel b ock, permits a limited movement of the connection between the driving lever 33 and the swivel block 22,

' movement of the\pawl rather than its connection with the driving lever.l p

The lockingpawl is designated by the numeral 46 and terminates at one end in a tooth 47, which is substantially the same shape as the notch 16, and the tooth 20 upon the pawl 19. This locking pawl, by.

means of the stud 49, is pivotally mounted upon a plate 48l adjustably secured to the driving lever 33 by the bolt 50, which passes through a slot 51 in said plate. The relative position of said locking pawl and driving lever is determined by the position of the screw 52 that is threaded through a lug 53 on the driving lever 33, and against the end of which the locking pawl is normally held by a springk 54 between the pins 55 and 56.

As the driving lever 33 is moved upon its pivot mounting, the locking pawl 46 moves therewith, and the tooth 47 upon the end thereof travels in a path toward' and away 16, which at the time is in register therewith. If for any reason the dial has not been moved to such position as to present a notch in the path of the tooth 47 the said tooth will contact with the periphery of the said dial and be rocked upon its pivot mounting 49 against the tension of the spring 54, permitting the driving lever 33 to continue its movement without action of the rocking pawl. This relative movement of the locking pawl upon Vthe driving lever 33 prevents the breakage of any of the parts if for any reason the dial is not moved to its proper position.

Cam roll 29 is held against the periphery of the cam 26, and the driving lever 33 is held under tension in one direction by a spring 58 that 'surrounds a spring-rod 59 between the collar 61 and the nuts 62 .and 63. The rod 59 passes through the spring arm 32 upon the rock lever 28 at one end and projects at the other end into an opening 60 in the lug 57 upon the driving lever 33.

is moved toward the dial and performs its operation upon the article in the opening 17 that is in -register therewith.A From this zero position the pawl 19 is moved about the axis of the dial 5, through the movement.

of the driving arm 33, which first rocks the said pawl 19 upon its pivot mounting 18 until the face 64 thereon contacts with the lat .face 65 upon the stud 66 fixed in the pawl arm 8, at which time the tooth 20 of the said pawl has been moved out of its engagement with the notch in the dial. By this action, the toothl 20 does not drag against either side of the notch, and therefore imposes no wear thereon. After the pawl has contacted with the stud 66,` the continued movement of .the driving arm 33 moves the pawl arm 8 in a rotary path about the aXi-s of the dial, and at the same time withdraws the tooth 47 onthe locking pawl 46 out of engagement'with lts notch,

so that the dial is entirely free for a subsequent rotation. During the movement of the pawl arm 8, just described, no portion of the pawl -19 is in engagement with the dial. At the next forward movement of the driving arm 33, the pawl 19 1s again rocked upon its pivot mounting 18 and the `tooth 2O thereon moved into the notch 16 in register therewith, and the continued movement of said driving arm maintains the said tooth 20 in engagement with said notch and rotates thedial about its axis until the substantial limit of its movement is reached, at which time the tooth 47 upon the locking p pawl 46 engages the notch 16, now brought into register therewith. Any additional movement of the driving arm 33, due to faulty adjustment, or other means, is accommodated by the yielding of the sprlng 45. During this entire movement of the pawl and dial the pawl maintains a fixed position in relation to the dial and has no relative movement in relation thereto.

The die block, designated by the numeral 67, is all below the dial, and can be moved into and out of its operative position without disturbing any of the elements of the feeding mechanism, a very desirable arrangement of the parts, and one not heretoi fore obtained.

In Fig. 5 I have shown a modified form of dial actuating mechanism, wherein the pawl arm 68 is provided with a lug 69 at its outer end, to which a pawl 71 is pivuotally secured by a pintle 70. This pawl is also liXed by the screw 73l to a pawl block 72, connected with the driving lever 74 by a rod 7 5 that passes through a swivel block 76, rotarily mounted within the driving lever 74. Nuts 77 provide means for adjusting the relative endwise position of the con- -movable into and out of the necting rod 75. The driving arm 74 and the locking pawl connected therewith .are both actuated by fthe same means as has been heretofore described in the preferred form of structure. Inl this case the first movement of the connecting rod rotates the pawl block 72, and thereby shifts the pawl 1 upon its pivot mounting and out of engagement with the notch in the dial, and at the commencement of the movement in the opposite direction the first action of the connection 75 .is to rotate the pawl 71 upon the pivot mounting in the opposite direction Within the spirit of this invention the details of the mechanism may be very materlally altered and still operate within the broad idea -of my invention, and I would -therefore have it understood, that I do not limit myself to the exact construction herein shown and described, but claim all that falls fairly within the spirit and scope of my invention. A

Having described my invention, what I claim as new and desire to secure by Letters Patent, is

1. The combination with a dial having one or more stop faces thereon; of a pawl lever movable about the same axis, as said dial; a pawl movably mounted upon said lever; means for .limiting the movement of said pawl upon said lever in one direction; a' rock lever; a second rock lever, having an operative engagement with andactuated by said first lever; means having connection with both of said levers for moving them in one direction; a connection between said second rock lever and said pawl; and a detent connected with one of said levers 4and l path of the stop faces in said dial. y

2. The combination with a dial having one or more stop faces thereon; of a pawl lever movable about the same axis as said dial; a pawl movably mountedv upon said lever; means for limiting thefmovement of said pawl upon said lever in one direction; a rock lever; a second rock lever, having an operative engagement with and actuated by said first lever; means having connection with both of said levers for moving them in one direction; a connection between said second rock lever and said pawl; means for varying the length of said connection; and a detent movabl mounted upon one of said levers and mova le into and out of 'the path of the stop faces in said dial.

3. The combination with a dial having one by said first lever; means rock lever;

' lever;

dial; a pawl movably A for applying an independor more stop faces thereon; of a pawl lever movabe about 'the same axis as said dial; a paw movably mounted upon said lever' means for limiting the movement of said pawl upon said lever in one direction; a rock lever; a second rock lever, having an operative engagement with and actuated having connection with both of said levers for moving them in one-direction; a connection between said second rock lever and said pawl; adetent connected with one of said levers and movable into and out of the path of the stop faces in said dial; and means :for variably limiting the movement of said detent upon lsaid lever. f

4. The combination with adialhaving one or more stop faces thereon;;of a ypawl lever movable about the sameaxis as said dial; a pawl movably mounted upon said lever; means for limiting the movement y, of said pawl upon said lever in one direction; a a second rock lever, having an operative engagement with and actuated by said iirst lever; means having connection with both of said levers for moving them in one direction; a connection between said second rock lever and said pawl; a locking pawl pivotally connected with one 0f said levers; means for varying the relative position of said pivotal connection with said lever; and means limiting the movement of said locking pawl in one direction.

5. The combination with a dial having one or morestop faces thereon; of a pawl lever; a pawl'movably mounted upon said and mLeansv for applying a variable friction to saidfdial and to said pawl lever. 6. -The combination with a dial; of a pawl lever movable about the same axis as said mounted upon said lever; and means ently variable friction to said dialv and said pawl lever.

7.The-combination with a central member; of a -diall rotatable thereon; a pawl lever rotatably mounted thereon; a pawl mounted upon said lever; means for maintaining the .incassi l contact of said central member withl said -pawl lever with a variable friction; and inendent means for applying a variable dep friction tol said dial. v

8. The combination with a central member; of a dial rotatably mounted thereon; a pawl lever rotatably mounted thereon; a pawl movably mounted upon said pawl lever; a member connected with said central member and having two independent spring elements connected therewith; and means for independently varying the tension of said spring members.

9. The combination with a central member; of a dial rotatably mounted thereon; a pawl lever rotatably mounted thereon; 'a pawl movably mounted upon said pawl lever; a member connected with said central member and having two independent spring elements connected therewith; and means for vindependently varying the tension of said spring members, one of said spring elements determining the friction upon said pawl lever and the other of said spring elerdnents determining the friction upon said ial. Y

10. The combination with avdial having one or more stop faces thereon; of a pawl.

lever movable about the axis of said dial; a pawl movably mounted upon said lever; means for limiting the movement of said pawl upon said lever in one direction; a rock lever; a second rock lever; means for operatively engaging said levers; means for adjusting the'relative position of said engaging means, whereby the stroke of said second lever may be varied; a connection between said second rock lever and said pawl; and a detent connected with one of said levers and movable into and out of the path of the stop faces in said dial.

vIn testimony whereof I ailix my signature "n presence of two witnesses.

ZENAS P. CAN DEE.

Witnessesz J. M. GALLOND, N. CoNNoR.

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