US3831274A - Jacket stripper - Google Patents

Jacket stripper Download PDF

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Publication number
US3831274A
US3831274A US42904973A US3831274A US 3831274 A US3831274 A US 3831274A US 42904973 A US42904973 A US 42904973A US 3831274 A US3831274 A US 3831274A
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Patent type
Prior art keywords
blade
cutting edge
foot
slitter
handle
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
Inventor
R Horrocks
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Adalet/ a Scott Fetzer Co
Original Assignee
Scott Fetzer Co
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
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21FWORKING OR PROCESSING OF METAL WIRE
    • B21F13/00Splitting wire
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02GINSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/12Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for removing insulation or armouring from cables, e.g. from the end thereof
    • H02G1/1202Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for removing insulation or armouring from cables, e.g. from the end thereof by cutting and withdrawing insulation
    • H02G1/1204Hand-held tools
    • H02G1/1207Hand-held tools the cutting element not rotating about the wire or cable
    • H02G1/1217Hand-held tools the cutting element not rotating about the wire or cable making a longitudinal cut

Abstract

A tool for use in stripping an insulating jacket from an electrically conductive cable includes a plastic handle and a cast high speed steel stripper. The stripper includes a shank embedded in the handle, a blade having a cutting edge, a foot and a guard.

Description

United States Patent [191 Horrocks Aug. 27, 1974 I JACKET STRIPPER [75] Inventor: Raymond G. Horrocks, Parkview,

Ohio

[73] Assignee: The Scott & Fetzer Company,

Cleveland, Ohio [22] Filed: 28, 1973 [21] Appl. No.: 429,049

[52] 11.8. C1 30/90.4, 30/294, 30/314 [51] Int. Cl B2lf 13/00 [58] Field of Search 30/90.4, 286, 294, 90.1,

[56] References Cited UNITED STATES PATENTS 1,268,997 6/1918 Pruett 30/294 1,642,625 9/1927 Norton 30/286 UX 2,098,123 11/1937 Wood 2,398,979 4/1946 Vaughan 2,636,245 4/1953 Stout 30/294 Primary Examiner-Al Lawrence Smith Assistant Examiner-J. T. Zatarga Attorney, Agent, or Firm-Watts, Hoffmann, Fisher & Heinke Co.

[57] ABSTRACT A tool for use in stripping an insulating jacket from an electrically conductive cable includes a plastic handle and a cast high speed steel stripper. The stripper includes a shank embedded in the handle, a blade having a cutting edge, a foot and a guard.

1 Claim, 5 Drawing Figures JACKET STRIPPER BACKGROUND OF THE INVENTION The prior art most nearly pertinent to this invention and known to me is U.S. Pat. No. 2,398,979 to Vaughan, No. 3,230,620 to Embelton and No. 3,486,228 to James.

While numerous attempts have been made heretofore to provide hand tools for slitting various materials ranging from tapes to roofing and including the insulation covering on cables, none of the proposed tools with which I am familiar has been entirely satisfactory particularly as regards simplicity and permanence of structure, cost of construction and safety and certainty of operation. For example, the tool of US. Pat. No. 2,398,979 is costly to make because of the machine work required to provide the parts and the hand work necessary to assemble them and, furthermore, is dangerous to workmen due to the exposed cutting edges. The tool of US. Pat. No. 3,230,620 is costly to make and assemble and is subject to clogging. The tool of US. Pat. No. 3,486,228 is quite unsuited to slitting cable insulation and is unnecessarily costly because of the size and arrangement of parts and is dangerous to use because of the exposed cutting edges.

SUMMARY OF THE INVENTION The present invention provides a hand tool for slitting cable jackets composed of insulating, semiconducting or mechanical rubber material, or any other suitable material which can be slit by a hand tool. The tool can be made inexpensively for the handle may be made by injection molding plastic material and the slitter may be made by casting high speed tool steel and.

by the investment, or lost wax process. The slitter and handle may be readily assembled by forcing the shank of the slitter into a hole in the handle or, preferably, by heating the end of the shank and then pushing the shank into the hole thereby causing the plastic material thereof to soften and till the interstices in the shank. The slitter has a double bevel cutting edge which may be made sharp by grinding. The sides of the blade are recessed to minimize the frictional contanct therewith of the material being slitted. The slitter includes a narrow foot along the bottom edge of the blade having a rounded leading end, a top surface which slopes slightly upwardly and rearwardly to the cutting edge and a plane bottom surface projecting a short distance on each side of the blade, for example, approximately equal to the thickness of the blade.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be better understood by those skilled in the art by reference to the accompanying drawings in which:

FIG. 1 is a perspective view of a preferred form of the present invention;

FIG. 2 is a side elvational view partly in section of the tool of FIG. 1;

FIGS. 3 and 4 are, respectively, a top plan view and an end elevation view of the slitter of FIG. 2; and

FIG. 5 is a fragmentary sectional view taken on line 5-5 of FIG. 2.

The tool T of FIG. 1 consists of handle 1 which is preferably composed of plastic material, for example, cellulose acetate. Handle 1 may be made by injection molding and is providedwith a longitudinal axialopening 3 for the shank of the slitter 7.

The slitter 7 is preferably composed of high speed tool steel and may be made. by casting, as by theinvestment or lost wax method.

The slitter 7 consists of a shank. 9, preferably cruciform in cross section, and with the. edges 11 of the ribs 13 thereof being of varying widths to form uneven sur-- faces and to insure that the handle and slitter will remain in assembled relation. The handle andslitter may be readily assembled simply by inserting the shank 9 in.

the longitudinal opening 3 in the handle 1, by driving.

' force when the opening is not large enough to admit the shank freely, or by heating the end of the shank of the. slitter to a dull red color and then pushing the shank into the hole in the handle. Such heating will cause the.

plastic material to flow into the interstices of the shank and to shrink and tightly grip it when cold.

The portion of the slitter 7 which projects from handle l is provided with a blade 15 having a leading cutting edge 17 formed by double beveled surfaces 19. A portion 21 of the shank projects beyond the adjacent end of the cutting edge. to serve as a guard against injury of the user by accidental contact with the cutting. edgev 17.

The edge of the blade. 15 oppositethe shank is provided with a narrow foot 23 having a plane bottom surface 25 and a rounded end 27 projecting beyond the adjacent end of the cuttingv edge 17. This foot is approximately three times as wide as the -blade is thick, i.e., the foot projects approximately as far on each side of the blade as. the thickness of the blade. The upper surface 26 of the leading end 27 of the foot 23 slopes upwardly at a small angle, for example, about 20 to a. point close to the adjacent end of the cutting .edge 17. The function of this upward slope is to elevate slightly the jacket on the cable and direct it toward the cutting edge.

The side surfaces 29 of the blade rearwardly from the beveled surfaces 19 are recessed on each side as is bet-. ter shown at 31 in FIG. 5 for the purpose of minimizing the friction of the material being slit with the sides of the blade.

The plane surface 25 of the narrow foot 23 makes a narrow plain area of contact with the cable within the jacket regardless of the diameter of the cable. As a result the tool may be used with cables of a wide range of diameters without making one or two line contacts with the cable and thereby possibly damaging the cable.

The manner of use of a tool embodying the present invention will be readily understood by those skilled in the art but may be briefly described as follows: The end 27 of foot 23 of the tool is inserted betweena cableand the insulating jacket which is around. the cable and which is to be slitted. The tool is moved longitudinally of the cable causing the sloping surface 26.0f the foot to elevate slightly the jacket as the tool is moved forwardly and direct it against the cutting edge 17 which slits the jacket as thetool is moved forwardly. The beveled edges 19 direct the jacket away-from the recessed side surfaces 31 of the blade without the creation. of any substantial friction.

Having thus described this invention in such full, clear, concise and exact terms as to enableany person skilled in the art to which it pertains to make anduse the same, and having set forth the best mode contemplated of carrying out this invention, I state that the subject matter which I regard as being my invention is particularly pointed out and distinctly claimed in what is claimed, it being understood that equivalents or modifications of, or substitutions for, parts of the invention may be made without departing from the scope of the invention as set forth in what is claimed.

downwardly and forwardly inclined cutting edge and side surfaces recessed rearwardly of said beveled surfaces, said slitter including a guard projecting forwardly above the upper end of the cutting edge and a foot at the lower edge of the blade, said foot having a plane bottom surface, a rounded leading end projecting just beyond the cutting edge and an upper surface sloping upwardly and rearwardly to the bottom end of the cutting edge at an angle of about 20 to the bottom surface of the foot, said fott projecting laterally beyond each side of the blade a distance approximately equal to the thickness of the blade.

Claims (1)

1. A ntool for slitting an insulating jacket on an electrically conductive cable comprising a handle composed of plastic material and a slitter composed of cast high speed tool steel and having a shank fixedly embedded in the handle, the slitter having a blade projecting from the free end of the shank and having a double beveled, downwardly and forwardly inclined cutting edge and side surfaces recessed rearwardly of said beveled surfaces, said slitter including a guard projecting forwardly above the upper end of the cutting edge and a foot at the lower edge of the blade, said foot having a plane bottom surface, a rounded leading end projecting just beyond the cutting edge and an upper surface sloping upwardly and rearwardly to the bottom end of the cutting edge at an angle of about 20* to the bottom surface of the foot, said fott projecting laterally beyond each side of the blade a distance approximately equal to the thickness of the blade.
US3831274A 1973-12-28 1973-12-28 Jacket stripper Expired - Lifetime US3831274A (en)

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Cited By (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4048719A (en) * 1976-02-17 1977-09-20 Mary Kay Thompson Carton opener
US4048696A (en) * 1976-07-01 1977-09-20 Master Machine & Manufacturing Co. Shrimp sheller
US4604804A (en) * 1985-03-04 1986-08-12 Horse Health Products, Inc. Cutting device for limb wrappings
JPH01109223U (en) * 1988-01-08 1989-07-24
JPH02129110U (en) * 1988-10-26 1990-10-24
US5094003A (en) * 1991-06-03 1992-03-10 Schwab Albert J Paper web cutting and retracting tool
US5387222A (en) * 1993-05-14 1995-02-07 Strickland; James W. Carpal tunnel tome and carpal tunnel release surgery
US5732471A (en) * 1996-11-14 1998-03-31 Applied Power Inc. Wire stripper with integral cable sheath cutter
US5827311A (en) * 1997-05-08 1998-10-27 Biomet Inc Carpal tunnel tome
US5873858A (en) * 1995-04-27 1999-02-23 University Of Utah Research Foundation Endotracheal tube splitter
US5908433A (en) * 1996-05-10 1999-06-01 Stryker Corporation Carpal tunnel knife
US6497681B1 (en) 2000-06-02 2002-12-24 Thomas Medical Products, Inc. Device and method for holding and maintaining the position of a medical device such as a cardiac pacing lead or other intravascular instrument and for facilitating removal of a peelable or splittable introducer sheath
US20030158565A1 (en) * 2002-02-15 2003-08-21 Medtronic, Inc. Slitting tool
US6711824B2 (en) * 2000-12-18 2004-03-30 Bridgeview Mfg. Inc. Bale processor twine cutter
US20040260205A1 (en) * 2003-06-20 2004-12-23 Boutillette Michael P. Guidewire exit tool
US20060108128A1 (en) * 2004-10-27 2006-05-25 Andreas Stihl Ag & Co. Kg Protective Shield for a Trimmer
US20070011885A1 (en) * 2005-07-15 2007-01-18 3M Innovative Properties Company Media Cutting Tool
US7169033B1 (en) 2005-10-21 2007-01-30 Colbert Norman V Seafood sheller
US20080163490A1 (en) * 2007-01-04 2008-07-10 Darrel Cruse Cable stripper
US20090049698A1 (en) * 2007-08-24 2009-02-26 Drake Ron A Slitter with adjustable shroud
US20090320664A1 (en) * 2006-08-02 2009-12-31 William Rayner Cutter device
US20120174410A1 (en) * 2006-01-31 2012-07-12 Medtronic, Inc. Slitting tool
US20130055863A1 (en) * 2011-09-02 2013-03-07 Wayne Winton Safety cutting device and associated methods
US20140081306A1 (en) * 2012-09-14 2014-03-20 The Spectranetics Corporation Tissue slitting methods and systems
CN104037676A (en) * 2014-06-19 2014-09-10 国网四川省电力公司成都市新都供电分公司 Heatable cable peeling device
CN104037677A (en) * 2014-06-19 2014-09-10 国网四川省电力公司成都市新都供电分公司 Cable stripping device applicable to low-temperature environment
US20150231369A1 (en) * 2014-02-20 2015-08-20 Boston Scientific Scimed, Inc. Peelable sheath
CN105947332A (en) * 2016-06-15 2016-09-21 罗国友 Installation device for high-voltage transformer substation in electric power engineering
CN106005632A (en) * 2016-06-15 2016-10-12 吴金玉 Convenient tool for tearing packing open
US9502869B2 (en) 2013-09-17 2016-11-22 Abb Technology Ltd. Tool and method for extracting wires from a cable
US20170203449A1 (en) * 2013-02-12 2017-07-20 Raymond E. Davis Utility cutter
US9782905B2 (en) 2007-08-24 2017-10-10 Medtronic, Inc. Slitter with mechanical holding finger

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1268997A (en) * 1917-09-06 1918-06-11 Truman Curtis Pruett Cutting device.
US1642625A (en) * 1926-08-27 1927-09-13 Edwin C Norton Blubber-slicing implement
US2098123A (en) * 1935-10-01 1937-11-02 American Enka Corp Device for stripping strandular material from circular holders
US2398979A (en) * 1945-02-14 1946-04-23 Jr Charles S Vaughan Cable stripping tool
US2636245A (en) * 1951-01-04 1953-04-28 Textile Trimming & Boarding Ma Cutting device
US2691822A (en) * 1951-05-10 1954-10-19 Jr Charles Swoope Vaughan Cable stripping tool
CH343987A *
US3162945A (en) * 1963-04-30 1964-12-29 Richard C Stabs Stripper for wire cable covering
US3230620A (en) * 1963-06-17 1966-01-25 Embleton Roy Mckinley Band cutter
US3365798A (en) * 1966-04-08 1968-01-30 Frank W. Cunningham Device for cutting soft wrappings
US3486228A (en) * 1967-09-12 1969-12-30 Russell P James Device for cutting roofing and the like

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH343987A *
US1268997A (en) * 1917-09-06 1918-06-11 Truman Curtis Pruett Cutting device.
US1642625A (en) * 1926-08-27 1927-09-13 Edwin C Norton Blubber-slicing implement
US2098123A (en) * 1935-10-01 1937-11-02 American Enka Corp Device for stripping strandular material from circular holders
US2398979A (en) * 1945-02-14 1946-04-23 Jr Charles S Vaughan Cable stripping tool
US2636245A (en) * 1951-01-04 1953-04-28 Textile Trimming & Boarding Ma Cutting device
US2691822A (en) * 1951-05-10 1954-10-19 Jr Charles Swoope Vaughan Cable stripping tool
US3162945A (en) * 1963-04-30 1964-12-29 Richard C Stabs Stripper for wire cable covering
US3230620A (en) * 1963-06-17 1966-01-25 Embleton Roy Mckinley Band cutter
US3365798A (en) * 1966-04-08 1968-01-30 Frank W. Cunningham Device for cutting soft wrappings
US3486228A (en) * 1967-09-12 1969-12-30 Russell P James Device for cutting roofing and the like

Cited By (48)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4048719A (en) * 1976-02-17 1977-09-20 Mary Kay Thompson Carton opener
US4048696A (en) * 1976-07-01 1977-09-20 Master Machine & Manufacturing Co. Shrimp sheller
US4604804A (en) * 1985-03-04 1986-08-12 Horse Health Products, Inc. Cutting device for limb wrappings
JPH01109223U (en) * 1988-01-08 1989-07-24
JPH02129110U (en) * 1988-10-26 1990-10-24
JPH0635627Y2 (en) 1988-10-26 1994-09-14 東海旅客鉄道株式会社 Sheath cut knife for cable
US5094003A (en) * 1991-06-03 1992-03-10 Schwab Albert J Paper web cutting and retracting tool
US5387222A (en) * 1993-05-14 1995-02-07 Strickland; James W. Carpal tunnel tome and carpal tunnel release surgery
US5507800A (en) * 1993-05-14 1996-04-16 Strickland; James W. Carpal tunnel tome and carpal tunnel release surgery
US5906593A (en) * 1995-04-27 1999-05-25 University Of Utah Research Foundation Endotracheal tube splitter
US5873858A (en) * 1995-04-27 1999-02-23 University Of Utah Research Foundation Endotracheal tube splitter
US5908433A (en) * 1996-05-10 1999-06-01 Stryker Corporation Carpal tunnel knife
US5732471A (en) * 1996-11-14 1998-03-31 Applied Power Inc. Wire stripper with integral cable sheath cutter
US5827311A (en) * 1997-05-08 1998-10-27 Biomet Inc Carpal tunnel tome
US6497681B1 (en) 2000-06-02 2002-12-24 Thomas Medical Products, Inc. Device and method for holding and maintaining the position of a medical device such as a cardiac pacing lead or other intravascular instrument and for facilitating removal of a peelable or splittable introducer sheath
US6711824B2 (en) * 2000-12-18 2004-03-30 Bridgeview Mfg. Inc. Bale processor twine cutter
US20030158565A1 (en) * 2002-02-15 2003-08-21 Medtronic, Inc. Slitting tool
WO2003070311A2 (en) * 2002-02-15 2003-08-28 Medtronic, Inc. Slitting tool
WO2003070311A3 (en) * 2002-02-15 2004-02-26 Medtronic Inc Slitting tool
US7029460B2 (en) 2002-02-15 2006-04-18 Medtronic, Inc. Slitting tool
US20040260205A1 (en) * 2003-06-20 2004-12-23 Boutillette Michael P. Guidewire exit tool
US7264001B2 (en) * 2003-06-20 2007-09-04 Scimed Life Systems, Inc. Guidewire exit tool
US7836602B2 (en) * 2004-10-27 2010-11-23 Andreas Stihl Ag & Co. Kg Protective shield for a trimmer
US20060108128A1 (en) * 2004-10-27 2006-05-25 Andreas Stihl Ag & Co. Kg Protective Shield for a Trimmer
US20070011885A1 (en) * 2005-07-15 2007-01-18 3M Innovative Properties Company Media Cutting Tool
US7169033B1 (en) 2005-10-21 2007-01-30 Colbert Norman V Seafood sheller
US8584364B2 (en) * 2006-01-31 2013-11-19 Medtronic, Inc. Slitting tool
US20120174410A1 (en) * 2006-01-31 2012-07-12 Medtronic, Inc. Slitting tool
US20090320664A1 (en) * 2006-08-02 2009-12-31 William Rayner Cutter device
US8220162B2 (en) * 2006-08-02 2012-07-17 Rayner Design Pty Ltd Cutter device
US20080163490A1 (en) * 2007-01-04 2008-07-10 Darrel Cruse Cable stripper
US20090049698A1 (en) * 2007-08-24 2009-02-26 Drake Ron A Slitter with adjustable shroud
US10005193B2 (en) 2007-08-24 2018-06-26 Medtronic, Inc. Slitter with adjustable shroud
US9782905B2 (en) 2007-08-24 2017-10-10 Medtronic, Inc. Slitter with mechanical holding finger
US9119940B2 (en) 2007-08-24 2015-09-01 Medtronic, Inc. Slitter with adjustable shroud
US20130055863A1 (en) * 2011-09-02 2013-03-07 Wayne Winton Safety cutting device and associated methods
US9763692B2 (en) * 2012-09-14 2017-09-19 The Spectranetics Corporation Tissue slitting methods and systems
US9949753B2 (en) 2012-09-14 2018-04-24 The Spectranetics Corporation Tissue slitting methods and systems
US20140081306A1 (en) * 2012-09-14 2014-03-20 The Spectranetics Corporation Tissue slitting methods and systems
US9724122B2 (en) 2012-09-14 2017-08-08 The Spectranetics Corporation Expandable lead jacket
US20170203449A1 (en) * 2013-02-12 2017-07-20 Raymond E. Davis Utility cutter
US9502869B2 (en) 2013-09-17 2016-11-22 Abb Technology Ltd. Tool and method for extracting wires from a cable
US20150231369A1 (en) * 2014-02-20 2015-08-20 Boston Scientific Scimed, Inc. Peelable sheath
CN104037677A (en) * 2014-06-19 2014-09-10 国网四川省电力公司成都市新都供电分公司 Cable stripping device applicable to low-temperature environment
CN104037676A (en) * 2014-06-19 2014-09-10 国网四川省电力公司成都市新都供电分公司 Heatable cable peeling device
CN106005632A (en) * 2016-06-15 2016-10-12 吴金玉 Convenient tool for tearing packing open
CN105947332A (en) * 2016-06-15 2016-09-21 罗国友 Installation device for high-voltage transformer substation in electric power engineering
CN105947332B (en) * 2016-06-15 2018-07-06 永春县永荣信息科技有限公司 Kind of power engineering equipment installed in high-voltage substations

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AS Assignment

Owner name: ADALET/SCOTT FETZER COMPANY, A CORP. OF DE.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SCOTT & FETZER COMPANY;REEL/FRAME:004688/0256

Effective date: 19861126

Owner name: ADALET/SCOTT FETZER COMPANY,OHIO

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SCOTT & FETZER COMPANY;REEL/FRAME:004688/0256

Effective date: 19861126