US1119510A

US1119510A - Wire-feeding mechanism.

Info

Publication number: US1119510A
Application number: US54180810A
Authority: US
Inventors: Lewis R Heim
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-02-03
Filing date: 1910-02-03
Publication date: 1914-12-01
Anticipated expiration: 1931-12-01

Description

L. R. HEIM.

WIRE FEEDING MECHANISM. APPLIQATION FILED FEB. a, 1910.

Patented. Dec. 1, 1914.

3 SHEETS-SHEET 1.

WITNESSES: ,QJQW M HE NORRIS PETERS c0. PHOTO-LITHQ. WASHINOIUN. a. r

L. R. HBIM.

WIRE FEEDING MECHANISM. APPLIOATION FILED FEB. 3, 1910 1,119,510, Patented Dec.1,1914.

3 SHEETS-SHEBT 2.

A I 3 2% WITNESSES: INVENTOR XQQJQ ZT ZW/QM- L BY ATTORNEY YHE NORRIS PETERS 60.. PHOTO-LITHO. WASHINGTON. D. c.

L. R. HEIM.

WIRE FEEDING MECHANISM.

APPLICATION FILED FEB. 3, 1910. 1, 1 1 9,5 1 O.

Patented Dec. 1, 1914.

3 SHEETSSHEET 3.

"HE NORRIS PETERS 50., PHOTO-LITHO. WASHINGTON. D. Cv

LEWIS R. HEIIJI, OF DANBURY, CONNECTICUT.

WIRE-FEEDING MECHANISM.

Specification of Letters Patent.

Patented Dec. 1, 1914:.

Application filed February 3, 1910. Serial No. 541,808.

To all whom it may concern:

Be it known that I, LEWIS R. HEIM, a citizen of the United States, residing at Danbury, county of Fairlield, State of Connecticut, have invented an Improvement in ire-Feeding Mechanism, of which the following is a specification.

This invention relates to wire feeding mechanism particularly adapted for use in staple driving machines.

One of the objects of the invention is to produce a wire feeding mechanism provided. with means for interrupting the wire feeding functions when a predetermined quantity of wire has been fed.

A further object is to provide means whereby the wire feeding mechanism may slip with respect to the wire when the feeding movement is interrupted.

With these and other objects in'view the invention consists in certain constructions and in certain parts, improvements and com binations which will be hereinafter described and then specifically pointed out in the claims hereunto appended.

In the accompanying drawings forming a part of this specfication in which like characters of reference indicate the same parts in all of the views, Figure 1 is a front elevation of the machine complete; Fig. 2 a side elevation partly in section on the line 2-2 in Fig. 1 looking in the direction of the arrows; Fig. 3 a rear elevation; Fig. 4: a front elevation of the head with the face plate removed showing the cutting 0E, forming and driving mechanisms in the raised or normal position; Fig. 5 a similar view showing the parts in the depressed position, the front block being removed; Fig. 6 a detail vertical section on the line 66 in Fig. 4; Fig. 7 a view of the forming block detached;'Fig. 8 a view similar to Fig. 4 showing the position of the parts at the instant of the cutting otf operation; Fig. 9 a similar view showing the position of the parts after the forming operation and before the driving operation; Fig. 10 a section on the line l()l0 in Fig. 9 looking in the direction of the arrows; Fig. 11 an elevation of the former and cutter carrying block detached; Fig. 12a plan view of said block; and Fig. 13 is a detail elevation of the feed pawl and ratchet and the pinion as seen from the right in Fig. 3.

Referring to the drawing, 20 designates the body of my improved stapling device,

said body being of approximate L-shape in side elevation to form a vertical head and an elongated rearwardly extended supporting base (see Fig. 2) adapted to rest upon one side of a ,boX or case to which a tag or label. is to be attached. A plunger 25 is mounted to reciprocate within a suitable bore or guide 26. At the upper end of. the plunger is a rounded head 28 which is adapted to receive a blow or pressure of the hand in operation. Below the head is a shank 29 which is rigidly secured to the plunger and is provided with an arm 30 to which a slide 31 is rigidly secured, said slide lying in a guide 32 in a carrying plate lll'forming part of the body andreciproeating with the plunger. A spring 33 hearing against the underside of the shank and against the body, the lower end of the spring being preferably socketed in the body, acts to return the plunger and slide to their normal position after each operation. As this spring is not required to perform any 'feedingor other operation but merely to return the operative parts to their normal position after an operation, it may be made relatively light and but little power is required to overcome it in use, thus adding greatly to the ease of operation ofthe machine and reducing the power or force of the blow or the amount of pressure required to operate it.

T he plunger is provided with a rack 34 which is engaged by a gear wheel 35 having a relatively long convex sectorindicated by 36. Gear wheel 35 meshes with a feed driving pinion 37 which is free to oscillate on a shaft 38 and is provided with a relatively short concave sector 109. naled in thebody and carries a feed ratchet 39 lying outside the pinion (see Fig.3) and on the opposite side of the body (see Fig. 1) carries a gear wheel -10, which hasformed integral therewith or rigidly secured thereto an upper feed roll 4 Shaft 38 is jour-' 42 denotes a housing which is rigidly sewheel 35 and pinion 37 will return the pawl backward over a tooth of the ratchet to its normal position. the pawl sliding forward to the engaging position after it has passed a tooth of the ratchet in the backward movement.

n denotes the lower feed roll which registers with the upper feed roll, and a pinion formed integral with or rigidly secured to the lower feed roll which meshes with gear wheel L0 on the upper feed roll. The lower feed roll and pinion 45 are mounted to rotate on a stud -16 which extends .from an arm 47 and lies loosely in a recess as in the body. Arm 4'? is pivoted in recess 48 as at 49 and the feed roll and pinion carried by the stud are yieldingly retained in operative position by a spring 50 the ends of which are connected. to the outer end of the arm 47 and to the body 20 (see Fig. 3 in connection with Fig. 1).

The wire, indicated by 51, is carried by a drum 52 mounted on a screw stud 53 which engages the body. A spring 54 bearing against the head of the stud and against the side of the drum provides the necessary tension therefor. The wire passes from the drum through a guide 55 which straightens it and then. between the feed rolls from which it passes into an elongated carrying groove 56 in a rear block 57 which is secured in the body by a screw 59 (see Fig. 4;). This groove which is covered and closed by a front block 58 intersects a guide channel 110 in rear block 57 in which the formers and driver, presently to be described, reciprocate. Said guide channel coincides with guidei32 and practically forms a continuation thereof. By providing this carrying groove for the wire between the feed rolls and the cutting off, forming and driving mechanisms, presently to be described, I prevent the possibility of the wire buckling and insure that the exact amount of wire delivered by the feeding mechanism will pass to the operating mechanism without kinks or bends. And furthermore by providing a relatively long convex sector 36 on gear wheel 35 and a corresponding relatively short concave sector 109 on pinion 37, I stop the rotation of the feed rolls the instant the feeding movement is finished and retain them stationary during the rest of the forward movement of the plunger and until near the end of the return movement thereof. At the end of the feeding movement concave sector 109 on the pinion will pass into engagement with the longer convex sector on the gear wheel and during the rest of the forward movement of the plunger the convex sector on the gear wheel will slide over the concave surface of the sector on the pinion the pinion being thus effectually locked against any movement whatever while the cutting off, forming and driving operations, presently to be de scribed, are being performed. i hen the plunger commences to rise or return the convex sector on the gear wheel will slide in the oppositedirection over the concave surface of the sector on the pinion, said pinion remaining locked, however, until the sector on the gear wheel has passed out 01 engagement with the sector on the pinion and the teeth of the gear wheel again engage the teeth of the pinion, which does not take place until near the end of the upward or return movement of the plunger, as will readily be understood from Fig. 3. As the wire is fed forward it passes through a groove 60 in the rear face of a forming block 61 which is socketed in front bloc]; 58. The forming block is shown as retained in its socket, indicated by 69, by a top plate 63. The forming block is free to reciprocate transversely to block 58 and is yieldingly retained in its forward or operative position by a spring 6% which is soclreted in a recess 65 in the forming block and bears against a face plate 66 which is secured to the body and covers the cutting off, forming and driving mechanisms. The upper rear edge of the forming block is provided with a bevel 67 for a. purpose presently to be explained. The forward end of the wire after the feeding movement abuts against the wall of guide channel 110 in bloclro'l' which acts as a stop, as clearly shown in Fig. 8, so that no more wire can be fed into carrying groove 56 until after a staple has been cut off and formed. Should the plunger be allo ed to rise or return after a feeding operation and before the cutting 1 off and forming operations and should the plunger again be driven forward the feed rolls would simply slip on the wire, as no wire could be forced into the carrying groove and there would be no danger of the wire buckling or of injury to the machine.

Slide 31 is retained in groove 32 by means of

side plates

68 and 69 which are secured to the head by screws 70 which also secure face plate 66 in place, the side plates lying under the face plate. These side plates partly overhang the groove and have in); port-ant functions which will presently be de scribed. The lower end of slide 31 is shown in Fig. 10 as cut away upon. its face, as at i over the sides of the forming block. The.

cutting off of the staple blank is performed by a cutter 77 at the outer edge of former 75 (see Figs. 8 and 11) acting in cooperation with the wall of groove 110 in block 57, said wall at the inner end of carrying groove,

56 (in which the wire is held against other than longitudinal movement) serving as a stationary cutting off die. It will be noted that the cutter is at the'outer edge of former 75 and extends downward slightly below former 7 6, so that the cutting off of the staple blank from the strip of wire is effected an instant before the formers commence to form the staple aboutthe forming block. An instant after the forming of the staple the driver engages the top of the staple and drives it through-the card or other article to be attached and into the article to which it is to be attached, as will be more fully decribed. I 1

Block 7 3 carrying the formers and cutter is operated from the slide by means of a hook 78 which is pivoted to the slide as at 79 and is provided at its lower end with a socket 80 which is adapted to receive a stud 81 extending from the block. The inner face of side plate 69 is a straight wall as at the upper end of projection 86 is a shoulder 87 which engages shoulder 84 on side'plate 68 to limit the upward or return movement of the slide and the parts carried thereby. In the normal position of the parts as in Fig. at, stud 81 on block 73 is firmly seated in socket 80 in the hook so that the block, formers and cutter are in fact locked to the slide and move forward with it, the hook being retained in the locking position by the engagement of surface 88 on the hook with straight wall 82 on side plate 69. The parts remain in this position durlng the forward movement of the slide until projection 86 on the hook engages incline and travels down said incline which forces the hook away from stud 81 as clearly shown in Fig. 5, leaving block 7 3 and the formers and the cutter wholly disconnected from the slide, incline 83 at the lower end of side plate 69 giving clearance to the hook. The disengagement of the hook from stud 81 will take place the instant the forming operation is completed and the block and formers will then remain stationary. An instant previous to the commencement of the driving operation the lower end of the driver will engage the beveled upper edge of forming block 61 and will force said block backward against the power of spring 6% (see Fig removes his hand from the plunger and spring 33 acts to return the plunger and with it the slide and theparts operated by both plunger and slide to their normal position. As the slide commences to rise or return the hook iscarried upward thereby and the engagement of surface 88 on the hook with incline 83 on side plate 69 forces the hook forward into engagement with stud 81 .on block 73, projection 86 on the hook riding up incline 85 on side plate 68 and permitting the hook to pass into engagement with the stud, as clearly shown in Fig. 9, in which position it is retained by the engagement of surface'88 on the hook with straight wall'82 on side plate 69. As soon as the hook has passed into engagement with the stud, block 73 and the formers and cutter will be raised to their normal position ready to cut off and form another staple.

The. operation of the machine as a whole has been so fully described in describing the operation of the mechanisms as to-hardly require further description. Inbrief, the

card, tag or other article to be attached is placed in position upon the box or other article to which it is to be attached, the staple driver is placed upon the card or tag with the slide over a place wherea staple is to be driven and then a blow upon the rounded head of the plunger is struck with thepalm of the hand, driving it forward. The forward movement of the plunger performs the several operations of feeding the wire for a staple, cutting off. the staple blank, formingthe staple, and driving it, and the return movement of the plunger, which is effected by a relatively light spring the instant the hand is removed from the rounded head or the pressure is relieved merely returns the parts to their normal position. The operation of feeding is performed by feed rolls drivenzby gearing operated by the plunger. The feed rolls are locked against backward movementby the engagement of a feed pawl with a feed ratchet and the feed driving pinion is looked after each feeding operation through the engagement of a concave sector on the feed driving pinion with a longer convex sector on the gear wheel which drives it, thus rendering movement of the pinion impossible until the gear wheel has passed, during the return movement of the plunger, into position to cause the teeth of the gear wheel to again engage the teeth of the pinion. T he staple driver is a part of or is rigidly se cured to a slide which in turn is rigidly connected .to the plunger. The staple is formed over a sliding forming block provided with a, groove to receive it, the formers, one of which is provided with a cutter to cut off the staple blank, are carried by a block which is detachably connected to the slide and is carried forward by the slide until the cutting off and forming operations are completed and is then detached therefrom, the block, formers and cutter remaining stationary while; the slide and driver continue their forward movement (the driver displacing the forming block), and drive the staple through the card, tag or notice to be attached and into the article to which it is to be attached. The return movement of the plunger caused by a spring raises the slide and driver, causes the block carrying the formers and cutter to be connected with the slide and raised thereby, and returns the feed pawl, over a tooth of the ratchet, to its normal position ready to feed the wire of another staple. Having driven a staple the body is moved to where another staple is required and another blow is struck upon the rounded head, staples being formed and driven as fast as the blows are struck.

As is clearly shown in Figs. 1 and 2, the outer or free end of arm 30'is connected to the slide 31 by a screw or other suitable detachable fastener, so that when necessary or desirable, the slide can be quickly released from the arm.

Having thus described my invention, I claim 1. As an improvement in wire feeding mechanism, the combination with a head and a plunger mounted in said head, of wire feeding mechanism actuated by said plunger and including interengaging complemental members having means for interrupting the wire feeding functions when a predetermined quantity of wire has been fed, and means for permitting the wire feeding members to slip with respect to the wire when the feeding movement is interrupted. 2. As an improvement in Wire feeding mechanism, the: combination with a head and a plunger mounted in said head, of wire feeding rolls, means actuated by said plunger for operating said feed rolls, said operating means including interengaged complemental members for permitting the rolls to slip when feeding movement of the Wire is completed.

3. As an improvement in wire, feeding mechanism, the combination with a head and a plunger mounted in said head, of wire feeding mechanism actuated by said plunger, said wire feeding mechanism includinga drive pinion, an operating pinion meshing with said drive pinion, said pinions being provided with complemental smooth sector portions for interrupting the wire feeding functions when a predetermined quantity of wire has been fed, and means actuated by said plunger for driving said operating pinion. v p

4. As an improvement in wire feeding mechanism, the combination with a head and a plunger mounted therein, of wire feeding mechanism actuated by said plunger, said wire feeding mechanism including a drive pinion, an operating pinion meshing with said drive pinion, said drive pinion being provided with a relatively small smooth sector portion, said operating pinion being provided with a relatively large smooth sector portion cooperating with the sector portion of thedrive pinion to render the feeding mechanism inoperative when a predetermined quantity of wire has been fed, and means actuated by said plunger for driving said operating pinion.

5,. As an improvement in wire feeding mechanism," the combination with a head and a plunger mounted therein, of an arm pivoted to said head at one end, means for resiliently supporting the other end of said arm, feed rolls one of which is supported by said arm, a drive pinion for actuating said feed rolls, and an operating pinion rotated by said plunger and meshing with said drive pinion, said pinions being provided with complemental smooth sector portions for interrupting the wire feeding functions when a predetermined quantity of wire has been fed.

In testimony whereof I afiiX my signature in presence of two witnesses.

LEWIS R. HEIM. WVitnesses i A. M. l/Voos'rnn, S. W. ATHERTON;

flopies of this patent may be obtained for five cents each, by addressing the Commissioner of Iatents, Washington, D. C.