US3044529A - Overwind device - Google Patents

Overwind device Download PDF

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Publication number
US3044529A
US3044529A US786824A US78682459A US3044529A US 3044529 A US3044529 A US 3044529A US 786824 A US786824 A US 786824A US 78682459 A US78682459 A US 78682459A US 3044529 A US3044529 A US 3044529A
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US
United States
Prior art keywords
coil
wire
uncoiled
coiling
leg portion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US786824A
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English (en)
Inventor
Alvin O Wollentin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CBS Corp
Original Assignee
Westinghouse Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Priority to US786824A priority Critical patent/US3044529A/en
Priority to DE1960W0027028 priority patent/DE1143930C2/de
Application granted granted Critical
Publication of US3044529A publication Critical patent/US3044529A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21F—WORKING OR PROCESSING OF METAL WIRE
    • B21F3/00—Coiling wire into particular forms
    • B21F3/02—Coiling wire into particular forms helically
    • B21F3/04—Coiling wire into particular forms helically externally on a mandrel or the like
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01K—ELECTRIC INCANDESCENT LAMPS
    • H01K3/00—Apparatus or processes adapted to the manufacture, installing, removal, or maintenance of incandescent lamps or parts thereof
    • H01K3/02—Manufacture of incandescent bodies
    • H01K3/04—Machines therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/4902—Electromagnet, transformer or inductor
    • Y10T29/49071—Electromagnet, transformer or inductor by winding or coiling

Definitions

  • the present invention relates to coil-winding machines and, more particularly, to an improved overwind device for such machines.
  • the reel, coil-guide head and coiling die are mounted on a wire-feed-gripper slide movable longitudinally with respect to the axis of the mandrel, which is retractable into and rotatable with the coiling head.
  • the wire-gripping finger holding the end of the uncoiled wire adjacent and across the mandrel rotates with the mandrel and the coiling head about the mandrel axis to coil the wire around the mandrel and thereby form the coil.
  • the coiling head is rotated a predetermined number of revolutions to produce a definite number of turns in the coil body. Simultaneously with such rotation the wire-feed-gripper slide is retracted longitudinally at a relatively slow rate in a direction away from the mandrel to provide a definite turns per inch in the finished coil.
  • the mandrel is further retracted at a faster rate to form the second straight uncoiled leg portion on the filament, parallel to the longitudinal body of the coil.
  • the mandrel is withdrawn from the coil and the second leg portion of the coil is cut a required distance from the mandrel whereupon the wound coil springs back a certain amount upon release from the coiling die.
  • the first leg of the filament is then released by the wire-clamping finger thereby permitting the finished filament to fall from the coil-winding machine into a suitable container.
  • Such prior-art overwind device has a cam and gear arrangement for rotating a carriage (which is slidable longitudinally of the mandrel axis and which carries the wiresupply reel on its spindle) through a predetermined angle about the mandrel axis and at a uniform rate with respect to the rotation of the mandrel and the coiling head to add or subtract a fraction of a turn from the coil, thus providing compensation for the spring-back of the coil on the mandrel when it is released therefrom, and
  • a further disadvantage of this conventional overwind mechanism resides in the fact that it is rotated to its starting position during the return of the wire-feed-gripper slide to its starting position and the presentation of the cut end of the uncoiled wire to the wire-gripping finger preparatory for the winding of the next coil. Such rotation of the cut end of the uncoiled wire during the return movement too often causes such end to strike the open wire-gripping finger and makes securement of such end therein impossible.
  • a specific object of the present invention is the provision of an improved overwind device which is readily accessible for any required maintenance, is simple in construction, has relatively few moving parts, and is low in manufacturing cost.
  • a further object of the present invention is the provision of an improved overwind device which rotates to its starting position during the formation of the second straight uncoiled leg portion, thereby eliminating rotation of the cut end of the uncoiled wire during the presentment of such cut end to the wire-gripping finger for securement of the lattertherein preparatory for the forming of the next coil.
  • Yet another object of this invention is the provision of an improved overwind device which utilizes its rotation to the starting position (during the formation of the second straight uncoiled leg portion) to rotate such second uncoiled leg portion during its formation to prevent bowing in such second uncoiled leg portion and to provide' a straight second leg portion and the same desired angularity with respect to the coil body in such second leg portion as in the first leg portion.
  • FIG. 1 is a fragmentary side-elevational view of the essential portions of a coil-winding machine of the type shown in the above-mentioned US. Patent No. 2,179,-
  • FIG. 2 is a perspective view of the improved overwind device shown in FIG. 1.
  • FIG. 3 is a fragmentary side-elevational view of the cam means and associated rack utilized. to drive the improved overwind device and showing the rack in the unlatched position preparatory for the starting of a winding cycle.
  • FIG. 4 is a fragmentary side-elevationalview of the coiling die and a portion of the wire-feed-gripper slide, the parts being shown in their positions at the start of the winding cycle and corresponding in time to the showing in FIG. 3.
  • FIG. 5 is a view similar to 'FIG. 3 and showing the rack at the end of the overwind operation.
  • FIG. 6 is a view similar to FIG. .4 and showing the amount of the overwind provided in the finished coil.
  • FIG. 7 is a view similar to FIGS. 3 and 5 but showing the latched position of the rack at the end of its return movement.
  • FIG. 8 is a view similar to FIGS. 4 and 6, taken alon the lines VIIIVIII of FIG. 1 in the direction of the arrows and illustrating the return movement of the coil: ing die preparatory for the presentment of the cut end of the uucoiled wire to the wire-clamping finger during movement of the wire-feed-gripper slide.
  • FIG. 9 is a vertical-sectional view taken along the; line IX-lXof FIG. 4 in the direction of the arrows showing the coiling die, associated die holder and pinion gear and a portion of the gear train used to drive the pinion gear.
  • FIG. 10 is a view similar to FIGS. 3, 5, 7 of an alternative embodiment of the overwind device of the' present invention where such device is utilized to sub tract a fraction of a turn from the body of the finished coil, showing the rack at the start of the winding opera 'Although the improved overwind device of the present;
  • a coil-winding machine of the type shown in the above-mentionedUS. Patent No. 2,179,296 is indicated generally by the reference numeral 10. Since the coil-winding machine 19, per se, forms no part of the present invention it is deemed sufllcient to only briefly describe its operation with respect to the improved overcoiling head 32, a predetermined number of turns in wind device of the present invention.
  • a reel 12 which carries uucoiled wire 14, is mounted on a wire-feed-gripper slide 15 of the coil-winding machine -10; 'This slide is horizontally reciprocable by conventional means (not shovm) on a frame 17 of the coil-winding machine 10.
  • an end of the uucoiled wire 14 from the reel 12 is fed by hand successively through a stationary jaw '16 and movable jaw 13 (which has been opened by conventional operating-means 9) and through a longitudinal Wire hole 20 (FIGS. 4, 6, 8, 9 and 11) in a coiling die 22 (FIG. 2), with the end of the wire 14 projecting therefrom a predetermined amount.
  • the jaws 16 and 18 are also mounted on the slide 15 and the coiling die 22 is secured in a die holder 23 (FIG. 9) which 7 holder is rotatable in the slide 15.
  • the coil-winding machine is then started.
  • the end of the uucoiled Wire 14 is moved by the slide 15 parallel to a retractable mandrel 26 which has been automatically inserted (by conventional means not shown) in a longitudinal mandrel hole 28 in the coiling die 22 and such end is presented to an open wire-gripping finger 30 on the nose of a coiling head 32 of the coil winding machine 10, which finger has been opened by operation of the aforesaid conventional operating means 19.
  • the wiregr-ipping finger 30 is thereafter automatically closed about the end of the uucoiled wire 14 and the movable jaw 18 is automatically opened by the same convention-a1 operating end-leg-potrtion 34 (FIG. 12) preparatory for the coilingoperation.
  • Wire-gripping finger 36 (holding the end of the uncoiled wire 14 adjacent and across the mandrel 26) is rotated, along with the mandrel 26 which telescopically engages the hole 28 in the die 22 as a bearing and the counterclockwise direction about the longitudinal axis of the mandrel 26 (in the direction of the arrow shown in FIG. 1) by conventional means (not shown) to provide a predetermined number of turns in the coil body 35 (FIG. 12
  • the wirefeed gripper slide 15 is moved to the left, as viewed in FIG. 1, at a predetermined relatively slow rate by conventional means (not shown) to properly space the turns being'formed in the coil body 35.
  • the die holder 23 and the ceiling die 22 are rotated in counterclockwise direction, as viewed in FIG. 1, about the mandrel axis by the improved overwind device of the present invention thereby adding a fraction of a turn to the turns in the coil body 35. This added fraction of a turn compensates for the spring-back in the coil body 35 when the coil is completed and released from the coil-winding machine 10 as hereinafter related.
  • a pinion gear 36 (FIGS. 2 and 9) 'afiixed to the die holder 23 and rotatable therewith is connected by a gear train 38 to a rack 40 which is vertically reciprocable in the wire-feed-gripper slide 15.
  • This rack 40 has a roller 42 biased by a compression spring 44 into engagement successively with a stationary operating cam 46 and return cam 48.
  • the operating cam 46 and the return cam. 48 are commonly pivoted at 50 on a plate 51 afiixed to the frame 17 of the coil-winding machine 10 and have their outer ends, as viewed in FIGS. 1 and 2, secured by suitable screws in annular adjustment slots 52 and 54 respectively, provided in the plate 51.
  • the improved overwind device of the present invention utilizes the abovementioned movement of the wire-feedgripper slide 15 to the left (during the rotation of the coiling head 32) to drive the overwind device.
  • This movement of the slide 15 causes the spring-biased roller 42, carried by the slide 15, to ride upwardly on the stationary operating cant 46 (from the position shown in FIG. 3 to the position shown in FIG. 5) thereby causing the rack 40 to move upwardly, as viewed in FIGS. 1 and 3.
  • This upward movement of the rack 46 is transmitted by the gear train 38 to the pinion 36 with resultant counterclockwise rotation of the latter, the die holder 23 and the coil die 22 (from their position shown in FIG. 4 to the position shown in FIG.
  • a latch 58 pivoted :at 60 on a bracket 62 afiixed to the wire-feed-gripper slide 15 slides into a notch 66 (FIGS. 1, 2, 3, 5, 7 and 11) provided in the left-hand face of the rack 49 thereby locking the rack 41 and the coiling die 22 in the position shown in FIGS. 1 and 2.
  • the latch 58 is biased by a tension spring 64 (FIGS. 1 and 2) into engagement with the left-hand face, as viewed in FIG. 3, of the rack 40.
  • Such spring 64 extends from a lug 65 projecting from the slide 15 to a rod 67 carried by the latch 58.
  • the mandrel 26 is then withdrawn from the mandrel hole 28 in the coiling die 22 and the second straight uncoiled end-leg portion 56 is then cut by conventional cutting means (indicated generally in FIG. 1 by the reference numeral 69) a predetermined distance from the coiling die 22, without any appreciable further spring back of the coil body 35.
  • the first straight uncoiled leg portion 34 is released from the wire-clamping finger 30 by operation of the operating means 19 thereby permitting the finished coil to drop from the coil-winding machine 10 into a container (not shown).
  • Operation of the operating means 19 also causes the movable jaw 18 to close 6 preparatory for the presentment of the cut end of the uncoiled wire 14 to the now open wire-clamping finger 30 during movement of the Wire-feed-gripper slide 15 to the right, as viewed in FIG. 1.
  • the improved overwind device uses its retracting rotation to the starting position (during the formation of the second straight uncoiled leg portion) to rotate such second straight uncoiled endleg portion in a direction opposite to the coiling rotation thereby releasing any bending stresses therein and pro viding the same desired angularity in both leg portions.
  • the rack 40 is lowered, as viewed in FIG. 10, and the pinion 36, coiling die holder 23 and coiling die 22 are rotated in clockwise direction about the longitudinal mandrel axis, as viewed in FIG. 11 to subtract a'fraction of a turn from the total number of turns being formed in the coil body 35' by the coiling head 32.
  • An overwind device for a coil-winding machine having a coiling head rotatable to form a coil provided with a coil body, a first uncoiled end-leg portion and a second uncoiled end-log portion
  • said. overwind device comprising a coiling die, means connected to the coiling die for rotating it through a predetermined angle in one direction during the rotation of the coiling head to form the coil body thereby varying by a fraction of a turn the total number of turns in the coil body to insure the disposition of the uncoiled end-leg portions of the coil in the same plane, and means also connected to the coiling die for returning the coiling die to its starting position after the formation of the coil body, for rotating the second uncoiled end-leg portion and the coil body in the other direction during the formation of the second uncoiled end-leg portion thus providing a straight second uncoiled end-leg portion and for allowing the coil body to spring back thus aligning the first and second uncoiled end-leg portions in the same plane.
  • an overwind device comprising a coiling die, means connected to the coiling die for rotating the coiling diethrough a predetermined angle in one direction during the rotation of the coiling head to form the coil body and operable by movement of the wire-feed-gripper slide during the spacing of the turns in the coil body thereby varying by a fraction of a turn the total number of turns in the coil body to insure the disposition of the uncoiled end-leg portions of the coil in the same plane and means also connected to the coiling die for returning the coiling die to its starting position aiter the formation of the coil body and operable by movement of the wire-feed-gripper slide to rotate the second end-leg portion and the coil body in the other direction during the formation of the second uncoiled end-leg portion thus providing
  • an overwind device comprising a.
  • an overwind device comprising a coiling die, rotating means connected to the coiling die, a first means operatively associated with the rotating means for causing rotation of the coiling die through a predetermined angle in onedirection during the rotation of the coiling head to form the coil body and operable" by movement of the wire-feed-gripper slide during the spacing of the turns in the ooil body thereby varying by a fraction of a turn the total number of turns in the coil body to insure the disposition of the uncoiled endleg portions of the coil in the "same plane, a second means also operatively associated with the rotating means for causing the return of thecoiling' die to its starting position after the formation of the coil body and operable by movement of the Wire
  • an overwind device comprising a coiling die, a rack reciprocable in the Wire-feed-gripper slide, gear means connected to the coiling die and to the rack for translating the reciprocating movement of the rack into rotational movement of the coiling die, a first cam ciated with the rack for causing the return of the coiling die to its starting position after the formation of the coil body and operable by movement of the wire-feed-gripper slide to rotate the second uncoiled end-leg portion and the coil body in the other direction during the formation of the second uncoiled end-leg portion, thus providing a straight second uncoiled end-leg portion and to allow the coil body to spring back thus aligning the first and second uncoiled end-leg portions in the sam plane, latching means on the wire

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Wire Processing (AREA)
US786824A 1959-01-14 1959-01-14 Overwind device Expired - Lifetime US3044529A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US786824A US3044529A (en) 1959-01-14 1959-01-14 Overwind device
DE1960W0027028 DE1143930C2 (de) 1959-01-14 1960-01-08 UEberdrehvorrichtung fuer eine Drahtbiegemaschine zur Herstellung von Gluehlampenwendeln od. dgl.

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Application Number Priority Date Filing Date Title
US786824A US3044529A (en) 1959-01-14 1959-01-14 Overwind device

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US3044529A true US3044529A (en) 1962-07-17

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US786824A Expired - Lifetime US3044529A (en) 1959-01-14 1959-01-14 Overwind device

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Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2458721C3 (de) * 1974-12-12 1978-10-19 Philips Patentverwaltung Gmbh, 2000 Hamburg Vorrichtung zur Herstellung von Glühlampenwendeln

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2197296A (en) * 1939-03-04 1940-04-16 Henry V Carver Looper machine
US2439893A (en) * 1945-08-01 1948-04-20 Gen Electric Filament coiling apparatus
US2801670A (en) * 1955-04-27 1957-08-06 Westinghouse Electric Corp Fractional overwinding device for coil winding machines

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE109227C (de) *
US2179296A (en) * 1938-10-01 1939-11-07 Gen Electric Filament coiling machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2197296A (en) * 1939-03-04 1940-04-16 Henry V Carver Looper machine
US2439893A (en) * 1945-08-01 1948-04-20 Gen Electric Filament coiling apparatus
US2801670A (en) * 1955-04-27 1957-08-06 Westinghouse Electric Corp Fractional overwinding device for coil winding machines

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DE1143930C2 (de) 1963-08-29
DE1143930B (de) 1963-02-21

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