US2818641A - Tool for cutting shielded wire cable - Google Patents

Tool for cutting shielded wire cable Download PDF

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Publication number
US2818641A
US2818641A US598616A US59861656A US2818641A US 2818641 A US2818641 A US 2818641A US 598616 A US598616 A US 598616A US 59861656 A US59861656 A US 59861656A US 2818641 A US2818641 A US 2818641A
Authority
US
United States
Prior art keywords
cutting
insulation
tool
teeth
shielded wire
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
US598616A
Other languages
English (en)
Inventor
Kenneth E Peterson
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.)
TE Connectivity Corp
Original Assignee
AMP Inc
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
Priority to NL104428D priority Critical patent/NL104428C/xx
Priority to BE559082D priority patent/BE559082A/xx
Priority to NL219004D priority patent/NL219004A/xx
Priority to US598616A priority patent/US2818641A/en
Application filed by AMP Inc filed Critical AMP Inc
Priority to DEA27558A priority patent/DE1042688B/de
Priority to CH354131D priority patent/CH354131A/de
Priority to GB22795/57A priority patent/GB825983A/en
Priority to JP1778757A priority patent/JPS337289B1/ja
Application granted granted Critical
Publication of US2818641A publication Critical patent/US2818641A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
    • H02G1/12—Methods 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
    • H02G1/1202—Methods 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
    • H02G1/1204—Hand-held tools
    • H02G1/1221—Hand-held tools the cutting element rotating about the wire or cable
    • H02G1/1224—Hand-held tools the cutting element rotating about the wire or cable making a transverse cut

Definitions

  • a common type of electrical conductor is the shielded wire cable, which in standard form (e. g., military specification MILC3162) comprises an inner conductor of stranded wire which is surrounded by an insulation sheath.
  • a covering of metallic braid surrounds the insulation which in turn is surrounded by an outer insulation sheath.
  • a plastic wrapper is placed between the inner insulation and the metallic braid.
  • the inner conductor is adapted to carry electricity while the metallic braid is used for grounding the cable.
  • the insulation is of rubber or a similar material.
  • Figure l is a front view of a tool showing an illustrative embodiment of a metallic braid cutter as set forth in this invention
  • Figure 2 is a fragmentary enlarged view of the cutting teeth shown in Figure 1;
  • FIG. 3 is a fragmentary plan view taken through IIIHI of Figure 2;
  • Figure 4 is an enlarged view of the shielded Wire conductor
  • Figure 5 is a view of the cutter shown in Figure 2 during the cutting operation
  • Figure 6 is a fragmentary perspective view of the cutting teeth shown in Figures 1 through 3;
  • Figure 7 is an embodiment showing a different shape of cutting teeth.
  • the cutting means of this invention may be applied to a conventional type of tool 10 2,818,641 Patented Jan. 7, 1958 ice (shown in broken lines in Figure 1) having a pair of arms 12, 14 which are commonly pivoted as at 16.
  • the cutting means 18 comprises a pair of complementary semi-circular blades 20 and 22 disposed on the inner surfaces of the arms 12 and 14 respectively. It is understood however that the cutting tool of Figure 1 is merely exemplary of a preferred embodiment. Actually the cutting means can be incorporated in various types of tools wherein the blades may be brought together to cooperate with each other in a cutting relationship.
  • FIG. 4 A common type of shielded wire cable is shown in Figure 4.
  • This cable has an inner conductor 30 surrounded by a sheath of rubber insulation 32 which is surrounded by a metallic braid 34, which in turn is surrounded by an outer insulation sheath 36.
  • a thin, circular section of plastic wrapping 38 is provided between the insulation 32 and the metallic braid 34.
  • a cutter constructed according to the principles of this invention provides a means for severing the metallic braid 34, without injuring the inner insulation 32. Since the cutting blades 20, 22 are identical it will only be necessary to describe one of them.
  • the cutting blade is shown as concave-convex, describing a segment of a circle whose concave surface has a radius approximately equal to the radius of the rubber insulation sheath 32. Thus, as seen in Figure 5, when the cutting blades are brought together on the cable, the blades define a circle having a circumference approximately equal to the circumference of the rubber insulation.
  • the cutting blade is formed on the inner edge of the handle 12.
  • the blade is preferably tapered toward the concave edge as shown in Figures 3 and 6.
  • a series of V-shaped notches are provided in the concave edge at regular intervals thus forming teeth which perform the severing operation.
  • the preferred embodiment has an included angle of approximately 60 between the V-shaped teeth thus forming a negative rake angle of about 30.
  • the notches may be of other shapes, e. g. a keystone having a 30 negative rake angle.
  • the teeth are made blunt by rounding off their inner surfaces to form confining lands 42.
  • the cutting edges are formed by the intersection of the notches with the planar surfaces while the sides of the teeth defining thickness are blunt by reason of the are formed therebetween.
  • the lands 42 direct the rubber inwardly during the cutting operation, thus preventing rupture of the insulation.
  • the outer insulation 36 is first stripped with a conventional type of tool to expose a portion of the braid.
  • the cable is then inserted between the blades 18, 22 and with the section to be severed placed intermediately of the blades.
  • the blades are then brought together, gathering the metal lic braid in the notches, as shown in Figure 5.
  • the inner surface of the teeth 42 gently bear upon the inner insulation.
  • the cutting blade constitutes a series of teeth 40 which are accurately disposed.
  • the apices of the teeth are of substantial width to form lands which function as bearing surfaces.
  • the notches between the teeth define the sharp severing edges 41 which actually cut the metallic braid.
  • the lands 42 define segments of a circle having a circumference approximately equal to the circumference of the inner insulation 32.
  • a device for severing the metallic braid on a shielded braid wire having an insulation sheath underneath the shielded braid including; a plurality of blades, each blade comprising a segment of a circle with a concave edge having a radius approximately equal to the radius of the insulation sheath, said blade having a plurality of acute angle notches therein which form teeth, said teeth being blunt in lateral cross section, whereby the blades cooperate to sever the metallic braid without rupturing the underlying insulation.
  • a tool for use in severing a sheath of metallic braid surrounding an underlying sheath of flexible insulation including, a plurality of complementary concave-convex segmental blades tapering in thickness toward their concave surface, the concave surface being rounded between the tapered sides, and a plurality of acute angle notches in the concave surface forming teeth therebetween, whereby the blades may be utilized to sever the metallic braid without rupturing the underlying insulation.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Processing Of Terminals (AREA)
  • Removal Of Insulation Or Armoring From Wires Or Cables (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Gripping Jigs, Holding Jigs, And Positioning Jigs (AREA)
  • Scissors And Nippers (AREA)
US598616A 1956-07-18 1956-07-18 Tool for cutting shielded wire cable Expired - Lifetime US2818641A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
NL104428D NL104428C (enrdf_load_stackoverflow) 1956-07-18
BE559082D BE559082A (enrdf_load_stackoverflow) 1956-07-18
NL219004D NL219004A (enrdf_load_stackoverflow) 1956-07-18
US598616A US2818641A (en) 1956-07-18 1956-07-18 Tool for cutting shielded wire cable
DEA27558A DE1042688B (de) 1956-07-18 1957-07-16 Zangenartig ausgebildetes Werkzeug zum Schneiden eines gesponnenen Schirmleiters
CH354131D CH354131A (de) 1956-07-18 1957-07-17 Werkzeug zum Abtrennen der leitenden Geflechtshülse von einem Kabel
GB22795/57A GB825983A (en) 1956-07-18 1957-07-18 Tool for cutting a braided conductor
JP1778757A JPS337289B1 (enrdf_load_stackoverflow) 1956-07-18 1957-07-18

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US598616A US2818641A (en) 1956-07-18 1956-07-18 Tool for cutting shielded wire cable

Publications (1)

Publication Number Publication Date
US2818641A true US2818641A (en) 1958-01-07

Family

ID=24396284

Family Applications (1)

Application Number Title Priority Date Filing Date
US598616A Expired - Lifetime US2818641A (en) 1956-07-18 1956-07-18 Tool for cutting shielded wire cable

Country Status (7)

Country Link
US (1) US2818641A (enrdf_load_stackoverflow)
JP (1) JPS337289B1 (enrdf_load_stackoverflow)
BE (1) BE559082A (enrdf_load_stackoverflow)
CH (1) CH354131A (enrdf_load_stackoverflow)
DE (1) DE1042688B (enrdf_load_stackoverflow)
GB (1) GB825983A (enrdf_load_stackoverflow)
NL (2) NL219004A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5414931A (en) * 1993-12-16 1995-05-16 Artos Engineering Universal stripping blade
US20060090346A1 (en) * 2004-10-28 2006-05-04 Chih-Ching Hsieh Cutting edges for wire cutters

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2523148C2 (de) * 1975-05-24 1982-04-15 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Absetzwerkzeug für Koaxialkabel
AT382984B (de) * 1982-06-14 1987-05-11 Krampe Josef Abisoliergeraet zur entfernung der aeusseren isolierung ein- oder mehradriger kabel

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5414931A (en) * 1993-12-16 1995-05-16 Artos Engineering Universal stripping blade
US20060090346A1 (en) * 2004-10-28 2006-05-04 Chih-Ching Hsieh Cutting edges for wire cutters
US7093364B2 (en) * 2004-10-28 2006-08-22 Chih-Ching Hsieh Cutting edges for wire cutters

Also Published As

Publication number Publication date
NL219004A (enrdf_load_stackoverflow)
JPS337289B1 (enrdf_load_stackoverflow) 1958-08-25
NL104428C (enrdf_load_stackoverflow)
BE559082A (enrdf_load_stackoverflow)
DE1042688B (de) 1958-11-06
CH354131A (de) 1961-05-15
GB825983A (en) 1959-12-23

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