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Publication numberUS3554243 A
Publication typeGrant
Publication dateJan 12, 1971
Filing dateMar 28, 1968
Priority dateMar 28, 1968
Also published asDE1914588A1
Publication numberUS 3554243 A, US 3554243A, US-A-3554243, US3554243 A, US3554243A
InventorsDerose Ralph A, Dicius Renualdas P
Original AssigneeItt
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Insulation stripping and wire wrapping equipment
US 3554243 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

United. States Patent EQUIPMENT 10 Claims, 6 Drawing Figs.

US. Cl.... 140/124; 242/7.l7:81/9.5 Int. Cl B2lfl5/00 Field of Search. 140/124; 81/95; 242/7.06, 7.17

References Cited UNITED STATES PATENTS 2,807,810 10/1957 Belek et al. 242/7.17 5/1959 Shulters et al. 242/7. 1 7

Inventors Ralph A. DeRose Villa Park; Renualdas P. Dicius, llinsdale, Ill. Appl. No. 716,878 Filed Mar. 28, 1968 Patented Jan. 12, 1971 Assignee International Telephone and Telegraph Corporation New York, N.Y.

a corporation of Delaware INSULATION STRIPPING AND WIRE WRAPPING 3,311,139 3/1967 Allen 3,378,048 4/l968 Woodetal.

ABSTRACT: Wire wrapping equipment is provided in the form of a novel bit for a wire wrap machine. The bit has the capability of removing insulation from a wire and then wrapping the hated wire around a terminal. To perform these functions the bit includes a rotary shaft supported within a cylindrical element. The cylindrical element and the rotary shaft couple directly to the wire wrap machine which holds the cylindrical element in a fixed position while coupling the rotary element to a drive shaft. An insulated wire to be wrapped is inserted into a slot on the rotary element, under a cutting element on the rotary element and over a slot fixed to the cylindrical element. A terminal to be wrapped is inserted into a hole in the end of the rotary element. When the rotary element is turned, insulation is severed by the cutting element, and the wire is pulled from the insulation by coaction of the rotary element and the slot in the fixed element. With further rotation, the hated wire is wrapped around the terminal.

lXYXllll lIIlIll INSULATION STRIPPING AND WIRE WRAPPING EQUIPMENT The present invention relates *to improvements in wire wrapping equipment used inymaking electrical connections.

The prior art includes devices forwrapping bare wire on terminals. It also includes devices'which can remove insulation from wires and wrap the wires on terminals in a more-or-less continuous manner. The wire wrappers used for wrapping bare wire frequently are simple, low-cost devices which function well to wrap wire from which insulation has previously been removed, but cannot cope with insulated wire. The machines capable of both stripping wire and wrapping it on terminals tend to be complicated and expensive. The present invention provides a simple and low-cost means for simultaneously stripping wire and wrapping wire on terminals.

The present invention relates to bits for hand-held wire wrap machines. The bits include means for receiving and supporting one end of an'insula'ted wire, for removing insulation from a portion of the wire, and for wrapping the bared portion of the wire and a piece of the insulated wire onto a terminal. The invention is equally adaptable to electrically operated machines and to machines which operate from an air supply. It is necessaryonly thatthe machineinclude a' chuck capable of receiving and operating the mechanism of abit.

The novel features of this invention are set forth with particularity in the appendedclaims. The invention itself, however, both as to its organization and its method of operation, together with additional objects and advantages-thereof, will best be understood from the following description of specific embodiments when read in connection with the accompanying drawings, in which:

FIG. 1 shows a wire wrap gun together with a bit in accordance with the present invention.

FIG. 2 is a perspective view of a bit embodying the principles of the invention.

FIGS. 3 and 4 show further details of the exemplary bit of F l6. 2.

FIG. 5a and 5b illustrate modifications in the bit.

F l6. 1 shows a wire wrap gun indicated generally at 2 which may be of conventional manufacture. The gun illustrated includes a handle in the form of a pistol grip at G, a power leadin at P, a motor housing l-l,.an operating trigger T and a chuck at C. The power supplied over the lead-in at P may, depending on the requirements of the, particular gun, take any suitable form, such as electric power, air pressure, a mechanical drive,


The chuck C, of the gun 2, includes ajn'element for gripping the outer surface of the shank 6 of a bit 3,and holding it in a fixed position relative to the gun 2;An internal .drive shaft, shown in the sectional view at 7, of the gun 2 is coupled to the motive force in the housing H and terminates within or near the chuck C. This internal drive shaft couples the motor to the shaft 8 of the bit so that operationof the gun will cause the shaft 8 to rotate within the shaft 6.

Rotation of the shaft 8 causes parts 10, 12, 14 and 16 of the bit 3 to rotate with the shaft. Part is secured to the shaft 8 by mechanical means. Part 10 incorporates a long recess at 12 which is proportioned to receive the end of an insulated 'wire. The wire is retained in the recess by a fastener 14.0neend of the insulating wire is inserted in a groove 17 under a cutter edge at 16 and passed over the notch 18. The notch 18 forms a portion of an element 20 which is fastened to the fixed shaft by a sleeve 22. The notch 18 keeps the main body of the insulated wire in a fixed position relative to the end in groove 12 when the shaft 8 is rotated by the gun. v

Rotation of the shaft 8, as indicated further in FlGS. 3 and 4, causes the cutter edge 16 to sever the insulation from the end of the wire. ln severing the insulation near the end of the wire the cutter edge 16 and part 10' rotate about the shaft 8 from the position shown in FIG. 3 to that shown in FIG. 4. During this period, the element) moves along the shaft 8 a distance d permitting the cutter edge 16 to sever the insulation substantially in a straight line and start pulling the wire from the insulation. The first portion of bare wire is indicated at 30 and the portion of insulation retained by 14 is indicated at 32. Further rotation of the shaft 8 then causes the end of the wire to pull free of the severed insulation at 32 and causes the wire. as it is bared, to wrap around a terminal 24 which has been previously inserted into the opening 26.

The position of the notch 18 on the element 20 relative to that of the cutter 16 and groove 17 determines the amount of insulated wire which will be wrapped around the terminal 24 as the wrapping occurs. This relative position can easily be adjusted by loosening the sleeve 22 and by turning the shaft 8 The amount of insulated wire to be wound in addition to the bare wire in a particular instance will be determined by specifications established for the particular use. The length of the bare wire wrapped on the terminal 24 depends on the length of wire 32 passed under the cutter edge 16 and under the fastener 14 into the recess, or groove, 12.

FIGS. 5a and 5b illustrate modifications of the bit including changes in the cutter edge 16, the retainer 14, and in the recess or slot at 12. The opening 26 in FlG. 5a is provided to receive a post or terminal on which wire may be wrapped. Wire in FlG. 5b will be passed over the cutter edge 16, through a hole which is not shown in part 10 and into the recess or slot 12. The hole between the cutter edge 16 and the slot 12 serves the same retaining function as does 14 in FIGS. 2-4. In order to better illustrate the cutter 16, a portion of FIG. 5b has been shown in section. The bit of FIG. 5a and 5b may be fitted via shaft 8 to a drive shaft 7 within a shaft 6 as is done in FIGS. 1 and 2. The portion of a bit shown in F lGS. 5a and 5b may also incorporate an element 20 to assure the necessary functional elements for wire wrapping.

To make use of the present invention,.a bit 3 is inserted in the chuck C of a wire wrap gun 2. The pistol grip will normally be grasped with one hand while wire is inserted by the other. To insert the wire, one end of an insulated wire 28 is thrust under the fastener 14 and into the recess 12 of the bit 3. The wire is passed through thenotch 17 and over the notch 18. The loose end of the wire is held taut by one hand so that the wire will be retained in the notch 18 when the shaft 8 rotates. The gun is then prepared to wrap wire on a particular terminal 24 by placing the opening 26 of the bit over the terminal.

Operation of the gun by squeezing the trigger will cause the shaft 8 and element 10 to rotate. As element 10 rotates, the insulated wire is caught in the notch 17 and forced against the cutter 16 which severs the insulation and, in effect, locks the severed portion of the insulation in the notch. Continued rotation of 10 then causes the portion of the wire formerly held in the notch to be pulled from the severed insulation 32 and wrapped around the terminal 24.

While the principles of the invention have been described above in connection with specific apparatus and applications, it is to be understood that this description is made only by way of example and not as a limitation on the scope of the invention.

We claim: I. A wire wrapping unit in the form 'of a bit for use with v.a wire wrapping gun, comprising:

a rotary element supported axially within a stationary cylindrical element; means forming an integral part of said rotary element for receiving the end of an insulated wire;

means coupling to said rotary element for holding the end of whereby rotation of said rotary element forces said insulated wire into contact with the cutting element and severs the insulation.

3. A wire wrapping unit as claimed in claim 1, including:

means associated with said rotary element for receiving the end of a terminal; and

means associated with the stationary cylindrical element for holding said insulated wire and forcing the end segment of bare wire to wrap around the terminal when the rotary element turns.

4. A wire s wrapping unit as claimed in claim 1, in which the rotary element and the stationary cylindrical element together form a bit operable in the chuck of a wire wrap driver machine.

5. A wire wrapping unit as claimed in claim 4, in which the means for receiving the end of an insulated wire includes a slot in said rotary element.

6. A wire wrapping unit as claimed in claim 1, in which the means for receiving the end of an insulated wire includes a slot in said rotary element.

7. A wire wrapping unit as claimed in claim 6, in which the means for holding the end of an insulated wire includes a retaining element extending over said slot to keep said insulated wire in said slot.

8. A wire wrapping unit as claimed in claim 4. in which the means for pulling said wire from said severed insulation includes means on said the stationary cylindrical element for supporting said wire and providing a pull on said insult insulated wire as said rotary element turns and pulls on said severed insulation.

9. A wire wrapping unit as claimed in claim 1. in which the means for pulling said wire from said severed insulation to provide an end segment of bare wire includes means serving to hold said bare wire while it is wrapped around a terminal.

10. A wire wrapping device comprising:

a rotary shaft including means integral thereto for receiving and holding one end of an insulated wire;

a fixed element for supporting and retaining a portion of said insulated wire in a fixed position relative to said one end;

said rotary shaft including cutting means integral thereto for removing insulation from said one end of said insulated wire;

said rotary shaft including a receptacle into which an electrical tenninal may be inserted;

said cutting means serving to sever the insulation from said wire permitting a strip of bare wire to be pulled from the insulation when the rotary element turns; and

said rotary shaft forcing the bare wire to twist around said terminal to form a firm electrical connection between said terminal and said bare wire.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2807810 *Dec 23, 1954Oct 1, 1957Bell Telephone Labor IncCombination wire stripping, cutting, and wrapping tool
US2885764 *Apr 18, 1955May 12, 1959Gardner Denver CoTool for preparing and applying wires to terminals
US3311139 *Oct 6, 1964Mar 28, 1967Ingersoli Rand CompanyHand tool wire wrappers
US3378048 *Aug 27, 1965Apr 16, 1968Int Standard Electric CorpWire wrapping tools
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3716080 *Feb 22, 1971Feb 13, 1973Int Standard Electric CorpWiring dressing tool
US3781932 *Dec 16, 1971Jan 1, 1974Gardner Denver CoCutting, stripping, and wrapping bit for insulated conductor wire
US3882906 *Jun 26, 1973May 13, 1975Siemens AgWire winding machine
US3967661 *Sep 17, 1975Jul 6, 1976Vector Electronic CompanyInsulation slitting and wire wrapping tool
US4380111 *Sep 8, 1980Apr 19, 1983Cooper Industries, Inc.Cutting, stripping and wrapping bit
US4633921 *Jun 12, 1985Jan 6, 1987Cooper Industries, Inc.Adjustable support bracket for conductor wrapping tool attachment
US5988018 *Nov 14, 1997Nov 23, 1999Tolbert; Thomas R.Mechanical wire stripper
US8136337Dec 23, 2009Mar 20, 2012Albert JacksonWire twisting device
US20070283559 *Jun 9, 2006Dec 13, 2007Albert JacksonWire twisting device
US20080083473 *Oct 5, 2006Apr 10, 2008Daniel Thomas WagnerWire splicer
US20110146222 *Dec 23, 2009Jun 23, 2011Albert JacksonWire twisting device
U.S. Classification140/124, 242/439.3, 81/9.43
International ClassificationH01R43/033, H02G1/12
Cooperative ClassificationH02G1/1204, H01R43/033
European ClassificationH02G1/12B2, H01R43/033
Legal Events
Jan 21, 1988ASAssignment
Owner name: ALCATEL USA, CORP.
Effective date: 19870910
Mar 19, 1987ASAssignment
Effective date: 19870311
Apr 22, 1985ASAssignment
Effective date: 19831122