US2772837A

US2772837A - Coil winding machine

Info

Publication number: US2772837A
Application number: US428659A
Authority: US
Inventors: James L Carroll
Original assignee: Individual
Current assignee: Individual
Priority date: 1954-05-10
Filing date: 1954-05-10
Publication date: 1956-12-04
Anticipated expiration: 1973-12-04

Description

Dec. 4, 1956 J. CARROLL 2,772,337

1 COIL WINDING MACHINE Filed May lO, 1954 2 Sheets-Sheet 1 I Z .1 21 a5 3732 |l|l' Q lul l In] I J 'H' Q 2; 1a 4.41;:

20 if N INVENTOR.

12 'I mesbmll ATTU RNEYS Dec. 4, 1956 J. L. CARROLL 7 2,772,837

COIL WINDING'MACHINE Filed May 10, 1954 2 Sheets-Sheet 2 W )V/Mff .L&\ \K

75 v I INVENTOR.

' ML. Calrvll A o N 4; 44

t COIL WINDING MACHINE I James L. cal-mu, Indianapolis Ind.

Application May 10, 1954, Serial No. 428,659 4Claims. (01.242 9 This invention relates to a coil winding machine, and more particularly to a machine for winding choke coils for television uses. p

The object of the invention is to provide a machine which will permit a person to quickly and easily wind coils such as television choke coils with accuracy.

1 Another object of the invention is toprovide a coil winding machine which includes a motor for rotating a chuck that engages an end of a coil form, there being a counter for recording the number of coils wound on the coil form. p p i Another object of the invention: is to provide a coil winding machine which is extremely simple and inexpensive to manufacture.

Other objects and advantages will be apparent during the course of the following description.

' -In the accompanying drawings, forming apart of this nate like parts throughout the-same:

Figure l is a front elevational view of the coil winding machine, constructed according to the present invention, and with parts broken away and insection.

Figure 2 is a top plan view of the coil winding machine. t t

Figure 3 is a'sectional view taken on the line 3-3 of Figure l. I l

' Figur'e4 is a fragmentary top plan view showing the application, and in which like numerals are used to desig- Patented Dec. 4, 1956 of the cable 21, and the cable 21 serves to operate a counter 24 which may be of conventional construction. The counter 24 is supported by an upstanding post 25 which extends from a body member 26 that maybe secured to the base 10. The counter 24 includes a scale or indicia 27, and movable pointers 28 and 29 are adapted to indicate on the 'scale 27 the number of coil windings that have been wound onthe form 36. A solenoid 30- is arranged contiguous to the counter '24, and the solenoid 30 includes a movable core 31 that is mounted for movement into and out of blocking relation with respect to the movable pointer 28. Thus, with the core 31 in the position shown in Figure 1, the pointer 28 will not be able to rotate, but when the solenoid 30 permits retraction of the core 31, then the finger 28 may rotate.

Wires

32 and 33 lead from the solenoid 30 for a purpose to be later described, and wires 34 and 35 leadfrom the motor 19. A casing 37 is arranged contiguous to one end of the solenoid 30, and a coil spring 38 is positioned within the casing 37.

A sleeve 39 is secured to an end of a drive shaft 49 which extends from the motor 19, the drive shaft 49 being rotated when the motor 19 is actuated. The sleeve 39 may be secured to the shaft 49 by means of a securing element 40, and mounted on the sleeve 39 is a bushing 41, there being a set screw 42 for holding the bushing 41 on the sleeve 39. Slidably mounted on the sleeve 39 is a collar 43 which is mounted for movement toward and away from the bushing 41. The collar 43 is provided with aninterior cutout or recess 48 for a purpose to be later described. A coil spring 44 is circumposed on the sleeve 39, and the coil spring 44 is interposed chuck and tailswcaand with parts of the chuck broken away and in section, the jaws beingclosed.

* Figure 5 isa view similar toFigure 4 but showing the jaws of the chuck open as when a coil form is to be removed or inserted. l

Figure 6is a sectional-view taken on the line 6-6 of Figure4. a

Figure 7 is a sectional view taken on the line .77 of Figure 4.

Figure 8 is a fragmentary elevational view showing a portion of the chuck and the coil form, and with portionsof the coil form broken away and in section.

--Figure 9 is a sectional view taken through the solenoid and showing the relation of the solenoid to the counter.

Figure 10 is aschematic wiring diagram for the pres ent invention. l l

. Referring in detail to the drawings, the numeral .10 designates a horizontally disposed base which can be madeof any suitable material, and the base 10 may be secured or clamped to a table 11 in any suitable manner, as for example by, means of the bolts 12. "A clamp 14 is secured between the bushing 41 and the collar 43 for normally urging the collar 43 away from the bushing 41.

The machine of the present invention further includes a chuck which embodies a pair of'pivotally mounted jaws 45, and each of the jaws 45 includes a transverse finger 47 that is seated in the cutout 48 in the collar 43. Pins 46 pivotally connect the jaws 45 to the sleeve 39, and a fulcrum pin 50 is positioned between the pair of jaws 45.

There is further provided a tailstock 51 which may be clamped to the rod 18 by a bolt and nut assembly 52, and the upper end of the tailstock 51 is provided with a slit 53 which is adapted to receive a lead 54 which extends from an end of the coil form 36, Figure 8. An end of the lead 54 may be provided with an enlargement 55 in order to prevent the lead 54 from being accidentally pulled loose from the tailstock 51. The numeral 56 designates the wire to be wound on the coil form 36, and the numeral 57 indicates a Wire cutter which extends from the tailstock 51.

A means is provided for moving the collar 43 from the position shown in Figure 4 to the position shown in Figure 5 to thereby cause opening of the jaws 45, and this means comprises a yoke 58 which includes a cutout 59 through which project the jaws 45, Figures 5 and 6. The yoke 58 includes a pair of legs 60 which are arranged contiguous to the outer surface of the collar 43, and an ear 61 is arranged on the lower end of the yoke 58. The ear 61 is pivotally connected to a clamp 62 by means of a bolt and nut assembly 63, Figure 3, and the clamp 62 is mounted on the rod 18. A link 64 extends from the yoke 58 and is secured thereto or formed integral therewith, and an arm 65 includes a transverse portion 66 which is pivotally connected to the 1ink'64. The lower end of the arm 65 is arranged in engagement with a bracket 67 which is adjustably connected to a plate 68 by means of bolt and nut assemblies 70, The plate 68 is hingedly. or pivotally connected to the-bottom of the table 11 in anysuitable mannerfas for example by means of the screws 69. Depending 'from the plate 68 and secured thereto is an arm 71 which has a foot pedal 72 connected thereto. one end connected to the lower surface of the table 11, while the other end of the coil spring 73 is connected to the plate 68. a Y The jaws 45 of the chuck are provided with a cutout 74 which defines a lip, Figure 8, and this cutout '74 is adapted to receive a portion of the wire 56 during the initial phase of winding the wire onto the coil form 36. The outer ends of the jaws 45 are provided with cutouts or notches 7 for receiving therein an end of the lead 76 which can extend from an end of the coil forrn,36. The numeral 77 designates a completed coil such as a choke coil for a television set, Figure 4, and after the coil has been wound to the position shown in Figure 4, the end of the wire 56 can be cut ed by being arranged in engagement with the Wire cutter 57. Then the completed coil 77 can be removed and used where desired. The coil form 36 is provided with a longitudinally extending groove 78, Figure 8.

. The numeral 79 designates .a suitable plug f r eng g ment with a suitable source of electrical energy such as a Wall socket, and supply lines 80 lead from the plug 79 to a pair of switches 81 and 82 for a purpose to be later described.

From the foregoing it is apparent that there has been provided a machine for use in winding coils such as the coil 77 which can be used as a television choke coil. In use one end or lead 76 of the coil form 36 is gripped in the spaces 75 between the jaws 45 with the jaws in the position shown in Figure 5. The other lead 54 of the coil form 36 is arranged in engagement with the slit 53, and then the jaws 45 are closed and are held in their closed position by means of the spring 44. Then, in a proper sequence the motor 19 can be actuated to cause the wire 56 to be fed from a suitable spool onto the lead portion 76 and then onto the main body portion 36 of the coil form and after the main body portion of the coil form has been wound with wire, the other lead 54 is wound and then the wire is cut off on the wire cutter 57. Initially the wire is arranged in engagements with the cutout 74 so as to help start the winding of the wire on the lead 76.

In actual practice the winding of the coil is started by slipping the end of the wire 56 under the lip or cutout 74, the wire being unwound from a spool and being held by the fingers of the operator. Thus, when the chuck including the jaws 45 starts to revolve the coil wire is twisted around the coil form lead 76 and several turns are wound onto this lead until the twist progresses to the plastic part of the coil form 36. The wire is then lifted up onto the form and the winding of the coil itself is started. At this point the foot switch 82 is thrown to activate both the motor 19 and the solenoid 30. When the proper number of turns are completed, the wire 56 is brought down off the plastic portion and again wound on the other coil form lead 54 for several turns. During this operation the coil wire is held at a downward angle so that at the finish the wire is under the cut-otf blade 57. This blade is sharp on the lower edge and is fixed in the tailstock 51. As the winding is finished, the wire progresses outwardly under the blade 57 and can be cut off at any point with an upward motion of the operators hand holding the wire. The upward snap of the operators hand combines with the movement of the wire being wound on the form lead to cut the wire in one simple operation.

The present invention will wind coils such as television choke coils extremely fast and in operation the jaws 45. of the chuck are opened by means of the foot pedal 72 which, through the

lever mechanism

65, 64 and 58 depresses the collar 43 which slides on the sleeve 39. The collar 43 is normally in a forward position due to the provision of the spring 44. Thespring pressure on the collar 43 normally holds the jaws 45 closed tightly on the coil form lead 76. The coil form is inserted from the top side of the machine with the motor 19 stopped and A coil spring 73 has with one lead 76 of the coil form inserted between the open jaws 45 of the chuck'and the other coil form lead 54 placed in the slit 53 in the'tailstock 51. When pressure on the foot pedal 72 is released, the spring 73 will return the parts from the dotted line position of Figure 3 to the solid line position of Figure 3 and the coil spring 44 will move the jaws 45 to he Closed position as shown in Figure 4. Then, with the U-shaped yoke 58 backed away from the face of the collar 43, the complete chuck assembly rotates freely.

After the coil-form'36is in place and the chuck operating the yoke 58 .is no longer pressing against the face of collar 43, the winding operation is started by laying the end of the wire under-the notch 74in the tip of the jaws 45. Then, by throwing the foot switch 81 to its On" position, the motor 19 only will be actuated so that the chuck will start to rotate and the coil wire 56 will be wound over the coil form lead wire 76. .Although the motor 19 is running, the counter pointer 28 does not move because of the solenoid stop 31. As the coil wire 56 progresses up to the edge of the form 36, the machine is stopped by the foot switch and by means of the handwheel 20. The wire 56 is then brought up over the edge of the coil form 36 and the foot switch is thrown to the position so that the'portion 82 of the switch is actuated whereby both the motor 19 and the solenoid 30 are actuated. This starts the motor 19 and releases the pointer 28 on the dial counter and when the proper number of turns have been wound, the machine is stopped again and the wire brought down oi the form onto the other lead 54 of the coil form. The motor 19 only is again turned on to wind the wire on the form lead 54 and this also brings the counter back to zero where it is stopped by the solenoid pin 31. The coil wire is snapped in two at the end of the wind by hooking it under the cutter S7. The jaws 45 are automaticallyopened when the foot pedal is de- Pr ss d.

. Iclam:

1. In a machine for winding coils, a horizontally disposed base, .a pair ofxjclamps secured to said base, a horizontally disposed rod extending between said clamps and secured thereto, a motor-supported by said rod and. connected to a source of electrical energy, a handwheel connected .to said motor, a flexible shaft operated by said motor, a counter operated by said flexible shaft and including movable pointers, a solenoid arranged contiguous.

to said counterand including a core mounted for movement into and .out of blocking engagement with a pointer of said counter, said solenoid being connected to said power source, a :driveshaft extending from said motor, a sleeve mounted on an end of said shaft, a-bushing mounted on said sleeve and secured thereto, a collar, slidably mounted on said sleeve and mounted for movement towards and away from said bushing, a coil 1 spring mounted on said sleeve and interposed between said bushing and collar, said collar being provided with an inner recess, a chuck including a pair of pivotally mounted jaws having fingers engaging said recess, said jaws clamping therebetween a coil form lead, -a tailstock'supported by said rod and provided with a slit in its upper end for receiving the other coil form lead, and means for operating said jaws. i

2. The apparatus as described in claim 1, wherein said means comprises a plate hingedly mounted below said base, a yoke arranged contiguous to said'collar, a link secured to said yoke and pivotally connected to said rod, a lever having one end connected to said link and its other end connected to said plate, and a coil spring conincluding a wire cutter connected to said tailstock.

4. In 'a machine for winding coils, a base, clamps secured to said base, a rod extending between said clamps and secured thereto, a motor supported by said rod and connected to a source of electrical energy, a handwheel connected to said motor, a flexible shaft operated by said motor, a counter operated by said flexible shaft and including movable pointers, a solenoid arranged contiguous to said counter and including a core mounted for movement into and out of blocking engagement with a pointer of said counter, said solenoid being connected to said power source, a drive shaft extending from said motor, a sleeve mounted on said shaft, a bushing mounted on said sleeve and secured thereto, a collar slidably mounted on said sleeve and mounted for movement towards and away from said bushing, resilient means mounted on said sleeve and interposed between said bushing and collar,

said collar being provided with an inner recess, a chuck including pivotally mounted jaws having fingers engaging said recess, said jaws clamping therebetween a coil form lead, a tailstock supported by said rod and provided with a slit therein for receiving the other coil form lead, and means for operating said jaws.

References Cited in the file of this patent UNITED STATES PATENTS Baldwin Jan. 5, 1954