US2804887A - Tool for unwrapping wrapped wire connections - Google Patents

Tool for unwrapping wrapped wire connections Download PDF

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Publication number
US2804887A
US2804887A US463948A US46394854A US2804887A US 2804887 A US2804887 A US 2804887A US 463948 A US463948 A US 463948A US 46394854 A US46394854 A US 46394854A US 2804887 A US2804887 A US 2804887A
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United States
Prior art keywords
tool
terminal
wire
groove
unwrapping
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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
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US463948A
Inventor
Reck Frank
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AT&T Corp
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Bell Telephone Laboratories Inc
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Publication date
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Priority to US463948A priority Critical patent/US2804887A/en
Application granted granted Critical
Publication of US2804887A publication Critical patent/US2804887A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/033—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for wrapping or unwrapping wire connections
    • H01R43/0335—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for wrapping or unwrapping wire connections for unwraping
    • 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
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53613—Spring applier or remover
    • Y10T29/53622—Helical spring
    • 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
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53687—Means to assemble or disassemble by rotation of work part

Definitions

  • This invention relates towi-re handling tools and more particularly to a tool for removing. a wrapped; wire connection' from a terminal.
  • a wrapped connection may be unwrapped by unwinding the connection wire from the terminal.
  • the end of the wire may be grasped by a suitable tool, such as a pair of pliers, and unwound.
  • a suitable tool such as a pair of pliers
  • An object of this invention is to expedite the removal of wrapped wire connections from terminals without damaging the terminals.
  • a feature of this invention resides in a tool having a helically formed end for picking up and loosening successive turns of the wrapped wire so that it may be easily withdrawn from the terminal.
  • a more specific feature of the invention is an unwrapping tool comprising a substantially cylindrical bar or rod having an axial, terminal-receiving bore or opening in one end and a spiral or helical land defining a groove around said end.
  • a feature of the tool of this invention lies in the knife edge or wedge formation of the outer end of the helical land or ridge that bounds the groove, whereby said outer end may be easily inserted between the end of the wire wrapping and the adjacent turn.
  • a further feature of the tool of this invention resides in a small flattened area or relieved portion immediately back of the tip on the outer surface of the wedge-shaped end to avoid gouging of the Wire and consequent interference with the loosening of the turns.
  • Fig. l is a perspective view of an embodiment of the invention.
  • Fig. 2 is a view in elevation of the grooved end of the tool of Fig. 1;
  • Fig. 3 is a further enlarged view somewhat exaggerated to show the flat on the outside of the wedge-shaped tip
  • F-ig. 41 isa View in elevation showing the tool, of Fig. 2' applied to;a terminal with the wedge-shaped tip inserted between theend of the coil portion of the wrapped con nection and an adjacent turn thereof;
  • Fig. 5 is a view similar to that of Fig. 2 of the outer end. of a modified unwrappingltool.
  • the unwrapping tool shown in Fig, l is; a hand tool. having a reduced. end portion. 10 withthe spiral groov'e'll ⁇ therein.
  • The'h'andl'ef portion 12] has. a knurled or otherwiseroughened' grip poftion I31;
  • Theend portion. 1'0 is. of a diameter 'suchjtliattlie spiral 1 1 is comparable in size to the coil. or wrappedj'po'rfion oftl'ie connection to be unwrapped.v
  • the liandlegportion may be, of some what greater diameter than the, end portion. 10 in. the interest of. ease of handling. f
  • the groove pitch is 2 to 4 times that of the wire coil or wrapping of the connection.
  • the ridge or land 15 between the convolutions of the groove 11 tapers to wedge form at the tip 16.
  • the extreme end of the tip has on the outer surface a small flat area, as shown at 17 in Fig. 3. This is somewhat exaggerated in the drawing in the interest of clarity of illustration.
  • This slight relieving of the wedge surface avoids gouging of the wire by the Wedge tip and consequent jamming of the tool in some instances.
  • the additional friction due to gouging may be enough to cause the tool to push the wire rather than sliding over it and to twist off the terminal.
  • the wrapped connection is ordinarily not a true helix, the turns on the flat side of a terminal being somewhat S shaped, as shown in Fig. 4.
  • the outer edge of the wedge encounters a slight depression followed by a rise in travelling over the bottom part of the S, which would increase the gouging tendency if it were not for the flat 17. 7
  • the tool is applied to a wrapped connection so that the terminal 20 enters the opening 14.
  • the tool is then rotated in the direction of the arrow 24 so that the wedge-shaped tip 16 enters the wrapping between its end 21 and the adjacent turn 22.
  • the end 21 of the wire is directed into the groove 11 of the tool, and continued rotation of the tool loosens the whole wrapping which may then be removed.
  • the outer end of portion 30 of the tool may be tapered, and the groove 31 may be of decreasing depth as it recedes from the tip.
  • This construction opens up the turns of the wrapping sufficiently so that when the opening 34 is removed from the terminal after unwrapping, the wire tends to drop free from the tool.
  • This latter-described construction may be varied by having only the taper with a groove of constant depth with reference to the taper, or only the shallowing groove with no taper. In either case the root radius of the groove will increase as the groove recedes from the tip, thus enlarging the diameter of the wrapping as it is loosened.
  • a tool illustrated is used by rotation in a counterclockwise direction, as indicated by the arrow 24 in Fig. 4. If it is necessary to unwrap connections of the other hand than that shown in Fig. 4, a tool adapted for operation in a clockwise direction may be used. Such a tool could be on the other end of the handle 12, for example.
  • the tool may be formed on the end of a bit adapted to be held in the chuck of a hand drill, used in place of the screwdriver bit in a power screwdriver or in other suitable drive means. also be combined with a power or hand driven wrapping tool.
  • the number of convolutionsfofthe groove 11 or the groove 31' may be varied within reasonable
  • a tool for unwrapping a wrapped wire connection from a terminal comprising an elongated bar having in one end thereof a substantially axial terminal receiving opening, and on the surface thereof and spaced from said opening a helical ridge, adjacent convolutions of which define a wirereceiving groove extending to said end, the groove bounding faces of said ridge tapering to define a wedge-shaped tip at the outer end thereof, and means for rotating said bar.
  • a tool as in claim 1 in which the outer surface of the wedge-shaped tip is flattened for a short distance.
  • a tool as in claim 1 in which the outer surfaceof the wedge-shaped tip immediately adjacent the end thereof has a relieved portion.
  • This unwrapping tool may 4.
  • a tool for unwrapipng a wrapped wire connection from a terminal said tool comprising a cylindrical bar, a substantially axial terminal receiving opening in one end of said bar, and on the surface of said bar a helical ridge defining between its convolutions a helical wire receiving groove extending to said end and communicating with said opening only at said end, the groove bounding faces of saidridge tapering to define a knife edge at the outer end thereof, and means for rotating said bar.
  • a tool as in claim 4 in which the surface of the knife edge that faces said end is flattened for a short dis tance back from the edge.
  • a tool as in claim 4 in which the surface of the knife edge that faces said end has a relieved portion immediately adjacent the edge.

Description

Sept. 3, 1957 Filed Oct. 22, 1954 lNVE/VTOR By FRECK Mam ATTORNEY United States Patent.@
Too Fon UNWRAPPING wRmzrimwmE coNNneno s.
FrankReck, Flushing, N. assignor t'o Bell Telephone Laboratories; Incorporated; New York 'Nt Ya, a corporation of New York This invention relates towi-re handling tools and more particularly to a tool for removing. a wrapped; wire connection' from a terminal.
As set forth in Patent 2,585,010. tol-Iickman, Mallina andwReck, an electrical connection. canbe: made to a; suitable terminal with proper tools by wrapping a wire around the terminal. Tools such as the one disclosed in the noted patent or in applicants Patent 2,649,121, issued August 18, 1953, will wind or wrap a connection of this type.
In connection with making repairs, alterations, etc., it often becomes necessary to remove wrapped wire con nections. This may be done by bodily pulling the coil or Wrapping of wire from the terminal by means of a tool having a hook or lug to go behind the coil. The operation is in the nature of wheel or gear pulling. However, since the adherence of the coiled wire to the terminal is rather tenacious in a properly Wrapped connection, terminals, particularly those of small section, may be broken by such an operation.
A wrapped connection may be unwrapped by unwinding the connection wire from the terminal. For example, the end of the wire may be grasped by a suitable tool, such as a pair of pliers, and unwound. Such an operation is time-consuming and also rather diflicult to perform where the terminal spacing is slight.
An object of this invention is to expedite the removal of wrapped wire connections from terminals without damaging the terminals.
A feature of this invention resides in a tool having a helically formed end for picking up and loosening successive turns of the wrapped wire so that it may be easily withdrawn from the terminal.
A more specific feature of the invention is an unwrapping tool comprising a substantially cylindrical bar or rod having an axial, terminal-receiving bore or opening in one end and a spiral or helical land defining a groove around said end.
A feature of the tool of this invention lies in the knife edge or wedge formation of the outer end of the helical land or ridge that bounds the groove, whereby said outer end may be easily inserted between the end of the wire wrapping and the adjacent turn.
A further feature of the tool of this invention resides in a small flattened area or relieved portion immediately back of the tip on the outer surface of the wedge-shaped end to avoid gouging of the Wire and consequent interference with the loosening of the turns.
Other and further objects and features of this invention will appear more fully and clearly from the following description of exemplary embodiments thereof taken with the appended drawing in which:
Fig. l is a perspective view of an embodiment of the invention;
Fig. 2 is a view in elevation of the grooved end of the tool of Fig. 1;
Fig. 3 is a further enlarged view somewhat exaggerated to show the flat on the outside of the wedge-shaped tip;
F-ig. 41isa View in elevation showing the tool, of Fig. 2' applied to;a terminal with the wedge-shaped tip inserted between theend of the coil portion of the wrapped con nection and an adjacent turn thereof; and
Fig. 5 is a view similar to that of Fig. 2 of the outer end. of a modified unwrappingltool.
The unwrapping tool shown in Fig, l is; a hand tool. having a reduced. end portion. 10 withthe spiral groov'e'll} therein. The'h'andl'ef portion 12] has. a knurled or otherwiseroughened' grip poftion I31; Theend portion. 1'0 is. of a diameter 'suchjtliattlie spiral 1 1 is comparable in size to the coil. or wrappedj'po'rfion oftl'ie connection to be unwrapped.v The liandlegportion may be, of some what greater diameter than the, end portion. 10 in. the interest of. ease of handling. f
As maybe seen inthe-enlarged view of Fig- 2f,,the tool. is provided with an axialopeuing or; bore 14.1fm rgeceiv= i'ngja. terminal 'sucli as tli'e terminal 20 of" Fig. 3.
The spiral of helical groove 11, should?v have a pitch: greater than that of the connection't'o" be 'iinwrapped. Advantageously, the groove pitch is 2 to 4 times that of the wire coil or wrapping of the connection.
The ridge or land 15 between the convolutions of the groove 11 tapers to wedge form at the tip 16. The extreme end of the tip has on the outer surface a small flat area, as shown at 17 in Fig. 3. This is somewhat exaggerated in the drawing in the interest of clarity of illustration. This slight relieving of the wedge surface avoids gouging of the wire by the Wedge tip and consequent jamming of the tool in some instances. For example, with very fine terminals and wire, the additional friction due to gouging may be enough to cause the tool to push the wire rather than sliding over it and to twist off the terminal. It may be noted here that the wrapped connection is ordinarily not a true helix, the turns on the flat side of a terminal being somewhat S shaped, as shown in Fig. 4. Thus the outer edge of the wedge encounters a slight depression followed by a rise in travelling over the bottom part of the S, which would increase the gouging tendency if it were not for the flat 17. 7,
As shown in Fig. 4, the tool is applied to a wrapped connection so that the terminal 20 enters the opening 14. The tool is then rotated in the direction of the arrow 24 so that the wedge-shaped tip 16 enters the wrapping between its end 21 and the adjacent turn 22. The end 21 of the wire is directed into the groove 11 of the tool, and continued rotation of the tool loosens the whole wrapping which may then be removed.
As shown in Fig. 5, the outer end of portion 30 of the tool may be tapered, and the groove 31 may be of decreasing depth as it recedes from the tip. This construction opens up the turns of the wrapping sufficiently so that when the opening 34 is removed from the terminal after unwrapping, the wire tends to drop free from the tool. This latter-described construction may be varied by having only the taper with a groove of constant depth with reference to the taper, or only the shallowing groove with no taper. In either case the root radius of the groove will increase as the groove recedes from the tip, thus enlarging the diameter of the wrapping as it is loosened.
It is noted that the tool illustrated is used by rotation in a counterclockwise direction, as indicated by the arrow 24 in Fig. 4. If it is necessary to unwrap connections of the other hand than that shown in Fig. 4, a tool adapted for operation in a clockwise direction may be used. Such a tool could be on the other end of the handle 12, for example.
Where it is desirable to use a power drive with a tool of this type, the tool may be formed on the end of a bit adapted to be held in the chuck of a hand drill, used in place of the screwdriver bit in a power screwdriver or in other suitable drive means. also be combined with a power or hand driven wrapping tool.
Various modifications may be made in this tool without departing from the spirit and scopeof theinvention,
For example, the number of convolutionsfofthe groove 11 or the groove 31' may be varied within reasonable,
limits.
What is claimed is:
1. A tool for unwrapping a wrapped wire connection from a terminal, said tool comprising an elongated bar having in one end thereof a substantially axial terminal receiving opening, and on the surface thereof and spaced from said opening a helical ridge, adjacent convolutions of which define a wirereceiving groove extending to said end, the groove bounding faces of said ridge tapering to define a wedge-shaped tip at the outer end thereof, and means for rotating said bar.
2. A tool as in claim 1 in which the outer surface of the wedge-shaped tip is flattened for a short distance.
3. A tool as in claim 1 in which the outer surfaceof the wedge-shaped tip immediately adjacent the end thereof has a relieved portion.
This unwrapping tool may 4. A tool for unwrapipng a wrapped wire connection from a terminal, said tool comprising a cylindrical bar, a substantially axial terminal receiving opening in one end of said bar, and on the surface of said bar a helical ridge defining between its convolutions a helical wire receiving groove extending to said end and communicating with said opening only at said end, the groove bounding faces of saidridge tapering to define a knife edge at the outer end thereof, and means for rotating said bar.
5. A tool as in claim 4 in which the surface of the knife edge that faces said end is flattened for a short dis tance back from the edge.
6. A tool as in claim 4 in which the surface of the knife edge that faces said end has a relieved portion immediately adjacent the edge.
References Cited in the file of this patent UNITED STATES PATENTS Abramson et a1 Jan. 7, 1936
US463948A 1954-10-22 1954-10-22 Tool for unwrapping wrapped wire connections Expired - Lifetime US2804887A (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3014271A (en) * 1957-07-18 1961-12-26 Leonard J Englund Tool for removing seals
US3019517A (en) * 1958-02-17 1962-02-06 Bell Telephone Labor Inc Wire unwrapping tool
US3162938A (en) * 1961-11-29 1964-12-29 Huck Mfg Co Spacer applying tool
US3805854A (en) * 1971-07-16 1974-04-23 B Self Wire wrapping tool
US4195401A (en) * 1977-11-07 1980-04-01 Cooper Industries, Inc. Conductor unwrapping bit
US5070720A (en) * 1991-01-23 1991-12-10 Burns John W Loop forming tool for cables and method of use thereof
US5125437A (en) * 1991-06-27 1992-06-30 Houston Industries Incorporated Preform remover apparatus
US5245749A (en) * 1992-09-14 1993-09-21 Couch Jr Donald J Wire wrapping and unwrapping kit
US20070187121A1 (en) * 2006-02-16 2007-08-16 Roger Kliskey Drum brake implement
US9083160B2 (en) 2012-09-24 2015-07-14 Wisman Enterprises, Llc Multi-function high voltage wire service handtool
US20190003204A1 (en) * 2017-06-28 2019-01-03 Rusty Lane Rogers Fencing tool

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US802184A (en) * 1904-09-07 1905-10-17 Frederic W Hillard Dowel-making machine.
US1073005A (en) * 1912-05-11 1913-09-09 Samuel J Watkins Boring-bit.
US1129711A (en) * 1914-02-21 1915-02-23 Elisha A Tinker Wire-splicer.
US2027139A (en) * 1933-04-21 1936-01-07 Greenlee Bros & Co Tubular boring tool

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US802184A (en) * 1904-09-07 1905-10-17 Frederic W Hillard Dowel-making machine.
US1073005A (en) * 1912-05-11 1913-09-09 Samuel J Watkins Boring-bit.
US1129711A (en) * 1914-02-21 1915-02-23 Elisha A Tinker Wire-splicer.
US2027139A (en) * 1933-04-21 1936-01-07 Greenlee Bros & Co Tubular boring tool

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3014271A (en) * 1957-07-18 1961-12-26 Leonard J Englund Tool for removing seals
US3019517A (en) * 1958-02-17 1962-02-06 Bell Telephone Labor Inc Wire unwrapping tool
US3162938A (en) * 1961-11-29 1964-12-29 Huck Mfg Co Spacer applying tool
US3805854A (en) * 1971-07-16 1974-04-23 B Self Wire wrapping tool
US4195401A (en) * 1977-11-07 1980-04-01 Cooper Industries, Inc. Conductor unwrapping bit
US5070720A (en) * 1991-01-23 1991-12-10 Burns John W Loop forming tool for cables and method of use thereof
US5125437A (en) * 1991-06-27 1992-06-30 Houston Industries Incorporated Preform remover apparatus
US5245749A (en) * 1992-09-14 1993-09-21 Couch Jr Donald J Wire wrapping and unwrapping kit
US20070187121A1 (en) * 2006-02-16 2007-08-16 Roger Kliskey Drum brake implement
US7458298B2 (en) * 2006-02-16 2008-12-02 Mayhew Steel Products, Inc. Drum brake implement
US9083160B2 (en) 2012-09-24 2015-07-14 Wisman Enterprises, Llc Multi-function high voltage wire service handtool
US20190003204A1 (en) * 2017-06-28 2019-01-03 Rusty Lane Rogers Fencing tool
US10920448B2 (en) * 2017-06-28 2021-02-16 Rusty Lane Rogers Fencing tool

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