US802712A - Machine for coiling wire. - Google Patents

Description

No.802f712. PATENTED OCT. 24, 1906. G. H. SGOTT & G. E. BIGELOW.

MAGHINE FOR GOILING WIRE.

APPLICATION FILED 33.19. 1904.

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APPLIUATION FILED FEB. 19' 1904.

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GEORGE H. SCOTT AND GEORGE E. BIGELOW, OF WORCESTER, MASSA- CHUSETTS, ASSIGNORS TO MORGAN SPRING COMPANY, OF WORCES- TER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

MACHINE FOR COILING WIRE.

Specification of Letters Patent.

Patented Oct. 24, 1905.

Application filed February 19, 1904. Serial No. 194,336.

To It whom, it may concern.-

Be it known that we, GEORGE H. Score: and GEORGE E. BIGELOW, citizens of the United States, residing at Worcester, in the county of Vorcester and Commonwealth of Massachusetts, have invented a new and useful Improvement in Machines for Coiling W'ire, of which the following is a specification, accompanied by drawings forming a part of the same, in whieh- Figure 1 represents a front elevation of a wire-coiling machine embodying our invention. Fig. 2 is an end view of the same. Fig. 3 is a top view. Fig. A is a sectional view of a portion of the machine, taken on the plane of the broken line 3 3, Figs. 1 and 2. Fig. 5 is a detached VW' of the mechanism for adjusting the pressure-roll by whichthe wire to be coiled is held against a rotatable arbor, said mechanism being shown in vertical central sectional view; and Fig. 6 represents the mechanism for raising and lowering the bending-roll relatively to the rotatable arbor. Fig. 7 is a sectional view on line 7 7, Fig. 5. Fig. 8 represents a closely-coiled spiral spring. Fig. 9 represents a coiled spring with open coils, and Fig. 10 shows the end of the arbor with its axis adjusted at an oblique angle to the line of movement of the wire.

Similar reference-figures refer to similar parts in the different views.

Our present invention relates to a wire-coiling machine for the manufacture of coiledwire springs and comprising one or more pairs of rotating feed-rolls by which the wire is continuously fed forward and an arbor around which the wire is wound spirally to form a spring; and our invention has for its objects to provide a rotatable arbor the peripheral movement of which exactly corresponds with the feeding movement of the wire, to provide means for severing a continuous strip of wire to produce springs of a predetermined length, to provide means for the adjustment of the axis of the rotatable arbor relatively to the line of movement of the wire as it is fed thereto, to provide means for the adjustment of the wire-coiling mechanism relatively to the feedrolls, to provide means for raising or lowering the bending-roll relatively to the plane of the rotatable arbor, to provide means for varying the axis of the bending-roll relatively to the axis of the arbor in correspondence with the desired pitch of the spring, and to provide means for the more convenient adjustment of the pressure and bending rolls relatively to the arbor, and we accomplish these objects, together with others, as hereinafter pointed out, by the construction and arrangement of parts as hereinafter described, and set forth in the annexed claims.

Referring to the accompanying drawings, 1 denotes a table supporting an upright framework 2, in which are journaled feed-rolls 3, arranged in pairs and positively rotated by a geared connection with a driving-shaft 4, carrying a belt-pulley 5, having a clutch eonnection 6 with the driving-shaft of any suitable and known form of construction. The feed-rolls 3 are provided with circumferential grooves 7, adapted to engage acontinuous piece of wire 8 and feed the same forward in the direction of the arrow 9 to an arbor 10, around the end of which the wire is coiled to form a spiral wire-spring, such as that shown at 11, Fig. 8, when the coils are wound closely together, or, as shown at 12, Fig. 9, with the coils wound some distance apart.

The arbor is formed of two sections 14k and 15, having a screw-threaded connection. The section 1 1 is provided with a tapered surface 16, fitting a correspondingly-tapered surface in a rotatable sleeve 17. The section 15 is provided with a shoulder 18, hearing against the end of the sleeve 17, so that as the section 15 is screwed into the section 14: the latter will become fixed within the rotatable sleeve 17. The rotatable sleeve 17 is journaled within a sleeve 19, having an interposed series of antifriction-balls 20 between the sleeves 17 and 19. The sleeve 19 is held in a fixed position in a bearing 21, which forms part of an adjustable block 22, Fig. 1, held in ways 23 in a vertical post 24: and vertically adjustable therein by an adjusting-serew 25, by which the arbor 10 can be raised or lowered relatively to the feed-rolls 3, so that the wire may be fed either above or below the arbor as the spring to be wound is either right or left hand.

The block 22 is provided at its lower end with a clamp-bearing26, which maybe tightened by a bolt 27, and the upper end of the block 22 has a similar clamp-bearing28, which is tightened by a bolt 29. The bearings 26 and 28 are adapted to receive a stem 30, Fig.

5, upon which is supported a pressure-roll 31, adapted to bear against the Wire and hold the same in contact with the arbor 10. In Figs. 1, 2, and 3the pressure-roll 31 is placed above the arbor 10 and the stem 30 is represented as being held in the clamp-bearing 28; but if the arbor 10 is raised so as to receive the wire upon its under side the pressure-roll 31 would then be held on the under side of the arbor and the stem 30 would be inserted in the clamp-bearing 26. The pressure-roll 31 is journaled upon a stud 32, which is held in a cylindrical block 33, capable of being vertically adjusted in the head 34 of the stem 30 by means of an adjusting-screw 35, havinga geared connection witha spindle 36, journaled in the head 34 and provided with a hand-wheel 37, thereby enabling the pressure-roll 31 to be vertically adjusted relatively to the arbor 10 in order to impart suflicient pressure to the wire to hold it firmly in contact with the arbor. The block 33 is also capableof being turned about its own axis within the head 34 in order to adjust the plane of the pressureroll 31 relatively to the axis of the arbor 10 to correspond with the pitch of the spring to be wound. \Vhen. the pressure-roll is thus adjusted, the block 33 is held from rotating by means of a clamping-ring 38, which is clamped against a sleeve 39, connected by a spline with the block 33, thereby enabling the block 33 to be held against rotation, but at the same time al low it to be vertically adjusted. The clamping-ring 38 is operated by a clamping-screw 41. The vertical post 24 is also provided with ways 42 for a vertically-adjustable block 43, which is vertically adjustable on the post 24 by means of an adjusting-screw 44. The vertically-adjustable block 43 carries a T-shaped casting composed of a stem 45 and a head 46. The stem 45 is held in the block 43 and is capable of being slightly rocked by hand in the block 43 and also of a longitudinal movement as it is actuated by an adj Listing-screw 47. In the head 46 is a cylindrical bar 48, carrying at one end a stud 49, on which is journaled a grooved bending-roll 50, adapted to press against the wire after it passes between the arbor and the pressure-roll 31 and bend the wire around the arbor. The inner end of the cylindrical bar 48 enter a sleeve 51 and is connected therewith by a spline 52. The sleeve 51 is provided with a neck 53, which extends through a plate 54, bolted to one end of the head 46, and provided with an external screw-thread having a nut 55, by

which the sleeve 51 may be clamped against the plate 54 and frictionally held from rotating. The cylindrical bar 48 is capable of a longitudinal movement as actuated by a screw 56 in order to enable the grooved bendingroll to be adjusted toward or away from the arbor 10. The adjusting-screw 56 has a geared connection with a shaft 57, provided with a hand-wheel 58, and the ad justing-screw 47 has likewise a geared connection with a shaft 59, provided with a hand-wheel 60, said hand- wheels 58 and 60 being located at the front of the machine and in a position to be conveniently operated by an attendant standing in front of the rotatable arbor 10.

The post 24 is mounted upon the table 1 and is swiveled upon a long bolt 61, which passes through a cap-piece 62, extending over the top of the post 24, and is screwed at its lower end into the table 1. The upper end of the bolt 61 carries a nut 63. The post 24 is also provided with a foot 64, resting on the table 1 and capable of being clamped to the table by a bolt 65, extending through a slot in the foot and entering the table 1. By loosening the bolt 65 and the nut 63 the post 24 may be rotated slightly around the long bolt 61 in order to vary the axis of the rotatable arbor l0 relatively to the line of movement of the wire as it is being fed to the arbor through the feed-rolls 3, so that the line of movement of the wire will form an angle other than a right angle with the axis of the arbor and approximating the desired pitch of the spring or the angle which is formed by the successive coils of the spring and the axis of the arbor, as illustrated in Fig. 10.

In beginning the operation of coiling a spring the end of the wire fed through the rolls 3 is entered between the arbor 10 and the pressure-roll 31, andthe end is bent clown- Ward to cause it to pass between the arbor 10 and the bending-roll 50, and to accomplish this the bending-roll is raised by rocking or swinging the T-shaped casting, carrying the bending-roll in its bearing in the block 43, and this is accomplished by connecting one end of the head 46, by means of a link 66, with a crank-pin 67, carried on a plate 68, which may be rotated on a stud 69 by a handle 70. The upward movement of the bending-roll 50 is limited by the contact of a shoulder 71 with a fixed stud 752, and the downward movement of the bending-roll 50 is limited by the contact of the link 66 with one side of the stud 69. The bending-roll 50 is also capable of adjustment by the rotation of the cylindrical bar 48 about its own axis in the head 46, and this is accomplished by inserting a spanner in a hole 73, Fig. 1, of the bar 48 after the clamping-nut 55 has been loosened and slightly rotating the bar 48 to its desired position, which may be determined by the position of a gage-mark 74 on the bar 48 relatively to the graduate-marks 75 on the end of the head 46, Fig. 6.v

Supported on the front side of the frame 2 is a bar 76, having its upper end pointed to form a cutting edge 77, and above the cutting edge 77 is mounted a vertically-sliding bar 78, having a similar cutting edge 79 in the plane of the cutting edge 77, and as the wire is fed between the rolls 3 it passes between the cutting edges 7 '7 and 79. Whenever it is desired to sever the wire, the bar 78, which is normally held in its highest position by a spiral spring 80, is forced downwardly by a cam-plate 81, pivoted on a stud 82 and having an eccentric slot 83, inclosing a stud 84, carried by the bar 78. The plate 81 is rocked by a lever-handle 85 with sufficient force to bring the cutting edges 7 7 and 7 9 against the opposite sides of the wire and produce nicks, so that when the nicked portion of the wire reaches the arbor 10 and is bent by the action of the roll 50 it will break apart. The handwheel 25, which is shown upon the top of the adjusting-screw 25, is removable therefrpm and may be transferred to the rectangular shank of the adjusting-screw I L, so that one handwheel may be utilized to actuate either one of the adjusting-screws 25 or l i, and the adjustingscrews 25 and 44 pass through slots 86 and 87 in the cap 62, said slots being curved concentrically with the axis of the long bolt 61.

What we claim as our invention, and desire to secure by Letters Patent, is-

1. In a wire-coiling machine, the combination with a rotatable arbor, of means for feeding the wire longitudinally to said arbor, means for holding the wire against the surface of said arbor, and means for varying the axis of said arbor relatively to the axis of the wire fed thereto, substantially as described.

2. In a wire-coiling machine, the combination with means for feeding the wire to an arbor, of an arbor, means for holding the wire against the surface of the arbor, and. means for varying the axis of the arbor relatively to the axis of the wire fed thereto, substantially as described.

3. In a wire-coiling machine, the combination with a bearing, of a sleeve journaled therein, a series of antifriction-balls between said sleeve and said bearing, and a removable arbor non-rotatably held in said sleeve, and means for feeding wire to said arbor.

4. In a wire-coiling machine, the combination with a pair of feed-rolls for feeding the wire to an arbor, of a post having vertical ways, a block adjustable along said ways, and an. arbor carried by said block, substantially as described.

5. In a wire-coiling machine, the combination of a supporting-table, feed-rolls mounted thereon, a post supported on said table and provided with vertical ways, Wire-coiling mechanism supported on said post and vertically adjustable thereon, substantially as described.

6. In a wire-coiling machine, the combination with means for feeding the wire to a coiling mechanism, of a wire-coiling mechanism comprising an arbor, a supporting-post for said wire-coiling mechanism, said post being capable of a rotating movement,whereby the axis of said arbor is varied, substantially as described.

7. I11 a wire-coiling machine, the combination with an arbor on which the wire is coiled, of a bending-roll, means for adjusting said roll in a line parallel with the axis of the arbor, means for adjusting said roll toward and away from said arbor, said adjusting mechanism comprising a pair of adjustingscrews, a pair of actuating-shafts having gear connection with said screws, and handwheels on said shafts contiguous to said arbor, substantially as described.

8. In a wire-coiling machine, the combination with an arbor in which the wire is coiled, of a bending-roll, a support for said bending-roll capable of swinging about an axis parallel with the axis of said arbor, a rocking crank-plate, stops for limiting the movement of said crank-plate, and a link connecting said crank-plate with said rollsupport, substantially as described.

9. In a wirescoiling machine, the combination with an arbor on which the wire is coiled, of a post having vertical ways, a block adjustable in said ways, a bearing for said arbor in said block, bearings in said block above and below said arbor-bearing, a pressureroll, and a pressure-roll support adapted to be interchangeably held in said upper and lower bearings, substantially as described.

Dated this 15th day of February, 1904.

GEORGE E. BIGELOW. GEORGE II. SCOTT. Witnesses PENELOPE CoMBEaBAorI, RUFUS B. FOWLER.

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