US2976345A - Insulated electric terminal - Google Patents

Insulated electric terminal Download PDF

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Publication number
US2976345A
US2976345A US693693A US69369357A US2976345A US 2976345 A US2976345 A US 2976345A US 693693 A US693693 A US 693693A US 69369357 A US69369357 A US 69369357A US 2976345 A US2976345 A US 2976345A
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United States
Prior art keywords
terminal
body
conductor
wire
base
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Expired - Lifetime
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US693693A
Inventor
John B Whitted
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WHITSO Inc
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WHITSO Inc
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Priority to US693693A priority Critical patent/US2976345A/en
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Publication of US2976345A publication Critical patent/US2976345A/en
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/40Securing contact members in or to a base or case; Insulating of contact members
    • H01R13/405Securing in non-demountable manner, e.g. moulding, riveting
    • H01R13/41Securing in non-demountable manner, e.g. moulding, riveting by frictional grip in grommet, panel or base
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00Insulators or insulating bodies characterised by their form
    • H01B17/56Insulating bodies
    • H01B17/58Tubes, sleeves, beads, or bobbins through which the conductor passes
    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R9/00Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
    • H01R9/16Fastening of connecting parts to base or case; Insulating connecting parts from base or case
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S411/00Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
    • Y10S411/913Self-expanding anchor
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S411/00Expanded, threaded, driven, headed, tool-deformed, or locked-threaded fastener
    • Y10S411/955Locked bolthead or nut
    • Y10S411/965Locked bolthead or nut with retainer
    • Y10S411/97Resilient retainer
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49826Assembling or joining
    • Y10T29/49863Assembling or joining with prestressing of part
    • Y10T29/4987Elastic joining of parts
    • YGENERAL 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
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49826Assembling or joining
    • Y10T29/49863Assembling or joining with prestressing of part
    • Y10T29/49876Assembling or joining with prestressing of part by snap fit

Description

March 21, 1961 J. B. WHlTTED INSULATED ELECTRIC TERMINAL Filed 001;. 31, 1957 q a] ,t.

United States Patent INSULATED ELECTRIC TERMINAL John B. Whitted, Kenilworth, 111., assignor to Whitso, Inc., a corporation of Illinois 2 Filed Oct. 31, 1957, Ser. No. 693,693

2 Claims. (Cl. 174-153) This invention relates to an insulated electrical terminal that may be used with an apertured base plate of any desired material. More particularly, the invention provides an improved terminal structure that may be simply made and easily used.

The primary object of this invention is to provide a new and improved insulated electrical terminal structure.

Another object is to provide such a terminal structure comprising but two parts which may be assembled without tools.

Another object is to provide a terminal which may be pushed into an aperture in a base plate and in so doing the terminal structure is in eflect locked in operative position to the base plate.

A further object is to provide a terminal structure of the character described which will meet all standards required of electrical wiring of a nature disclosed.

Other features, objects and advantages of the invention will be apparent from the following description of preferred embodiments illustrated in the accompanying drawings in which:

Figure 1 is a sectional view through a base plate with two terminal structures mounted thereon and shown in section;

Figure 2 is a plan view of the terminal structure shown in the left hand side of Figure 1;

Figure 3 is a transverse sectional view through the terminal of Figure 2, taken on about line 33 of Figure 2;

Figure 4 is a plan view of the terminal structure shown on the right hand side of Figure 1, and

Figure 5 is a transverse sectional view taken substantially along line 5-5 in Figure 4.

All the figures of the drawing are much enlarged since the terminal structures are quite small and the enlargement is only for the purpose of clarity of illustration.

Attempts have been made to form a terminal structure for the purpose of inserting the same in apertures in a base plate permitting wiring to the metal part of the terminal on either side of the plate. Base plates of dielectric material, such as Bakelite, do not have the rigidity to hold a terminal against accidental displacement during installation or later use. It is preferable, therefore, to have a plate of metal which, of course, would be a good electrical conductor.

In general, the present invention provides a new type terminal structure in which a Wire segment comprises the metal part of the terminal and the segment is provided with a carrier body which also serves to insulate the segment from the base plate. As best seen in Figure 1, 'a base plate 6, which may be a steel plate of about 4 thickness or the like, is provided with apertures 7 and 8 of about diameter. On the left hand side of the figure,a push through type terminal 9 is installed in the aperture 7 while on the right hand side, a standoff type terminal 10 is installed in the aperture 8.

Referring first to the terminal 9, it comprises but 2,976,345 Patented Mar. 21, 1961 two parts. The conductor 11 is a wire segment of square design,as best seen in Figure 3. The wire 11 is somewhat sharpened at its end .12 and 13 and extends completely through its housing 14. The housing is a molded nylon plastic body formed with a central round bore 15 and an outer fluted section. The flutes are in pairs, such as a pair 17 (Figure 3) forming a fishtail design in section separated from adjacent fishtail sectional flutes by a square groove 18. This particular form of flute structure has been found quite effective in holding the terminals in a base plate and is more particularly described in my copending application, Serial No. 568,404, filed February 28, 1956, now Patent No. 2,820,209. The end portions 19 and 20 of'the body are tapered, generally, so as to guide the terminal structure into a base plate aperture.

One of the advantages of the present structure is that the terminal conductor and the insulating carrier body may be separately formed. Once the nylon body is molded, the square wire segment may be pushed forceably through the bore 15. As illustrated in Figure 3, the corner portions 21 of the wire become embedded in the wall of the bore thus frictionally locking the body on the wire segment.

In assembling the segment to a base plate, the assembly is pushed into the aperture 7 until the body 14 rests within the aperture. The flutes 1-7 will flatten to allow the body to pass into the aperture. The resiliency of the material makes the flutes expand once through the aperture thus forming a shoulder 22 on the lower side of the plate. In practice, a flute structure about .020" larger than the diameter of the aperture is satisfactory so that a definite shoulder 23 is formed by the flutes on the side of the plate from which the terminal was forced. The flutesrebound or expand outwardly about half the distance required of them to flatten in passing through the orifice. Thus, the flutes 24 on the portion of the body that is passed through the orifice will be about .010" larger than the orifice.

Cooperation between the plate and the body of the terminal may be used to further lock the terminal in place. A notch 25 may be provided in the wire segment about midway within the body so that the nylon material '26 opposite the notch will be forced into it by the compression on the body within the orifice. Other ways of forcing material into a particular configuration in the wire segment may be used. Various shapes, turns, or twists of the wire may provide shoulders such as those on the top and bottom of the notch 25, all of which may aid in locking the parts in their assembly position. Additionally, notches 27 and 28 may be provided in the exposed portions of the wire segment for use and aid in attaching conductors to the segment.

The standoff terminal 10 is similarly formed in that a square wire segment 3-1 is forced into a round bore 32 formed in the body 33. In this form of the terminal, the body may have an enlarged head 34 and a fluted post portion 35 with flutes 36 formed the same as the flutes 17. The terminal segment may have notches 37 and 38 formed for similar purposes as the notches described in the terminal segment 11.

In both of the structures, the body is molded of nylon and then assembled on a wire conductor segment. The assemblage may be accomplished by merely forcing the wire into the round bore molded in the body. A friction fit, similar to the press fit, is accomplished. Considerable force is required to pull the parts apart. Once the terminal is forced into an aperture in the base, more than an ordinary force will be required to move it. The flutes in the body in efiect lock the ternnnal to the base.

Another advantage of the structure is that the insulating housing about the terminal protects the terminal against shorting on the base. Conductors may be attached to the wire segment and in the case of the push-through terminal, simplified wiring is possible since resistors may e maunte on on ide-pf he pla e nd cuitr an the other, and the two will not interfere with each other.

' The terminals are held rigidly upright relative to the base and the body effectively insulates the terminal and holds it in its useable position.

The foregoing detailed description has been given for clearness of understanding only and no unnecessary limitations should be understood therefrom as some modifications will be obvious to those skilled in the art.

I claim:

1. An insulated electrical terminal, comprising: a two part assembly including a square Wire conductor and an elongated insulating body about the central portion of the conductor, said body being a molded nylon plastic member and having an uninterrupted annular portion throughout its length, said member having a central bore defining the interior of said annular portion and receiving the conductor for frictionally binding the conductor and body together, resiliently yieldable, outwardly extending flutes on the annular portion of said body for binding the body to a base when forced into an aperture in the base smaller than the outermost extent of said flutes and larger than the outer extent of said annular portion, said body having a length to extend on either side of said base holding the conductor in position for use relative to the base and insulating the conductor from the base.

2. An insulated electrical terminal for providing a conductor through an electrically conductive base plate, comprising: a resilient molded nylon body of generally cylindrical configuration and having a round central bore therethrough forming an annular insulating body, an outer fluted surface in the insulating body, a generally square conductor wire extending through the central bore and having its corner portions frictionally gripped in the bore, said fluted surface having outwardly extending flute members extending longitudinally of the body, said flute members being resiliently yieldable to bind the body to the base plate when the assembly of base and conductor wire is forcibly inserted into an aperture therein so that the annular body both mounts the terminal for use and insulates the conductor wire from the base plate.

References Cited in the file of this patent UNITED STATES PATENTS OTHER REFERENCES Erie Resistor Corp. Bulletin ERD 101A, Teflon Insulated Electronic Components, page 7, Erie, Pennsylvania.

US693693A 1957-10-31 1957-10-31 Insulated electric terminal Expired - Lifetime US2976345A (en)

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Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3164054A (en) * 1962-04-13 1965-01-05 Illinois Tool Works Bushing with rib and shoulder means
US3180009A (en) * 1964-02-27 1965-04-27 Honeywell Inc Method of fabricating a composite electrical terminal assembly
US3200694A (en) * 1963-02-08 1965-08-17 Illinois Tool Works Plastic fastener
US3203304A (en) * 1960-09-08 1965-08-31 Illinois Tool Works Plastic sealing washer and fastener assembly
US3230592A (en) * 1963-11-07 1966-01-25 Gen Motors Corp Molding strip fastener
US3232160A (en) * 1964-09-09 1966-02-01 Long Lok Corp Self-locking pin
US3248078A (en) * 1964-04-30 1966-04-26 Radar Relay Inc Support bracket
US3264591A (en) * 1963-12-31 1966-08-02 Gen Electric Removable bar for current transformer
US3327581A (en) * 1965-03-24 1967-06-27 Schlueter Ernest Polygonal shafted stud with corner grooves
US3403369A (en) * 1965-02-18 1968-09-24 Bell Telephone Labor Inc Connector
US3560690A (en) * 1968-12-18 1971-02-02 United Carr Inc Electrical switch with lowered panel mounting means
US3810054A (en) * 1973-04-26 1974-05-07 Robertshaw Controls Co Automatic pilot valve magnet contact construction
US3871057A (en) * 1973-05-25 1975-03-18 Hughes Aircraft Co Tool and method for insertion and removal of electrical connector interface seals
US3982363A (en) * 1974-10-18 1976-09-28 Ddk Investments, Ltd. Frangible insert
US4016696A (en) * 1975-04-04 1977-04-12 The Dayton Sure-Grip & Shore Co. Tie rod hole plug in combination with a wall hole
US4548450A (en) * 1984-05-29 1985-10-22 Gte Communication Systems Corporation Terminal pin securing arrangement
FR2573583A1 (en) * 1984-11-22 1986-05-23 Aerospatiale Device for guiding elongate objects such as cables through a wall
US4710132A (en) * 1984-11-12 1987-12-01 Siemens Aktiengesellschaft Electrical plug connector strip
US4750878A (en) * 1985-08-09 1988-06-14 Automotive Products Plc Retainer bushing
US5017151A (en) * 1990-10-05 1991-05-21 Molex Incorporated Floating panel mount for electrical connectors
US5334047A (en) * 1993-03-12 1994-08-02 Thomas & Betts Corporation Electrical connector mounting posts
US6485330B1 (en) * 1998-05-15 2002-11-26 Fci Americas Technology, Inc. Shroud retention wafer
US20060104743A1 (en) * 2004-09-30 2006-05-18 Illinois Tool Works, Inc. Flute positioner
WO2009015926A1 (en) * 2007-07-27 2009-02-05 Robert Bosch Gmbh Elongate component having an inner conductor
US20100266362A1 (en) * 2007-11-30 2010-10-21 Phoenix Contact Gmbh & Co. Kg Connecting flange, particularly for an electric terminal

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20381C (en) *
US121060A (en) * 1871-11-21 Improvement in screw-bolts
US793737A (en) * 1904-02-23 1905-07-04 Eli Packer Nut-lock and bolt-lock combined.
US1141598A (en) * 1915-06-01 Alfred A Ziegler Circuit-wire terminal.
US2433911A (en) * 1944-11-29 1948-01-06 Johnston Leith Lead through terminal
GB641917A (en) * 1948-03-03 1950-08-23 Mini Of Supply Improvements in or relating to sealing devices
US2542144A (en) * 1945-01-01 1951-02-20 Shellmar Products Corp Blind rivet
GB667393A (en) * 1949-04-25 1952-02-27 Telegraph Condenser Co Ltd Improvements in or relating to means for mounting electric terminals or leading-out wires
US2820209A (en) * 1956-02-28 1958-01-14 Whitso Inc Insulated electrical terminal

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20381C (en) *
US121060A (en) * 1871-11-21 Improvement in screw-bolts
US1141598A (en) * 1915-06-01 Alfred A Ziegler Circuit-wire terminal.
US793737A (en) * 1904-02-23 1905-07-04 Eli Packer Nut-lock and bolt-lock combined.
US2433911A (en) * 1944-11-29 1948-01-06 Johnston Leith Lead through terminal
US2542144A (en) * 1945-01-01 1951-02-20 Shellmar Products Corp Blind rivet
GB641917A (en) * 1948-03-03 1950-08-23 Mini Of Supply Improvements in or relating to sealing devices
GB667393A (en) * 1949-04-25 1952-02-27 Telegraph Condenser Co Ltd Improvements in or relating to means for mounting electric terminals or leading-out wires
US2820209A (en) * 1956-02-28 1958-01-14 Whitso Inc Insulated electrical terminal

Cited By (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3385157A (en) * 1960-09-08 1968-05-28 Illinois Tool Works Plastic fastener
US3203304A (en) * 1960-09-08 1965-08-31 Illinois Tool Works Plastic sealing washer and fastener assembly
US3164054A (en) * 1962-04-13 1965-01-05 Illinois Tool Works Bushing with rib and shoulder means
US3200694A (en) * 1963-02-08 1965-08-17 Illinois Tool Works Plastic fastener
US3230592A (en) * 1963-11-07 1966-01-25 Gen Motors Corp Molding strip fastener
US3264591A (en) * 1963-12-31 1966-08-02 Gen Electric Removable bar for current transformer
US3180009A (en) * 1964-02-27 1965-04-27 Honeywell Inc Method of fabricating a composite electrical terminal assembly
US3248078A (en) * 1964-04-30 1966-04-26 Radar Relay Inc Support bracket
US3232160A (en) * 1964-09-09 1966-02-01 Long Lok Corp Self-locking pin
US3403369A (en) * 1965-02-18 1968-09-24 Bell Telephone Labor Inc Connector
US3327581A (en) * 1965-03-24 1967-06-27 Schlueter Ernest Polygonal shafted stud with corner grooves
US3560690A (en) * 1968-12-18 1971-02-02 United Carr Inc Electrical switch with lowered panel mounting means
US3810054A (en) * 1973-04-26 1974-05-07 Robertshaw Controls Co Automatic pilot valve magnet contact construction
US3871057A (en) * 1973-05-25 1975-03-18 Hughes Aircraft Co Tool and method for insertion and removal of electrical connector interface seals
US3982363A (en) * 1974-10-18 1976-09-28 Ddk Investments, Ltd. Frangible insert
US4016696A (en) * 1975-04-04 1977-04-12 The Dayton Sure-Grip & Shore Co. Tie rod hole plug in combination with a wall hole
US4548450A (en) * 1984-05-29 1985-10-22 Gte Communication Systems Corporation Terminal pin securing arrangement
US4710132A (en) * 1984-11-12 1987-12-01 Siemens Aktiengesellschaft Electrical plug connector strip
FR2573583A1 (en) * 1984-11-22 1986-05-23 Aerospatiale Device for guiding elongate objects such as cables through a wall
US4750878A (en) * 1985-08-09 1988-06-14 Automotive Products Plc Retainer bushing
US5017151A (en) * 1990-10-05 1991-05-21 Molex Incorporated Floating panel mount for electrical connectors
US5334047A (en) * 1993-03-12 1994-08-02 Thomas & Betts Corporation Electrical connector mounting posts
US6851974B2 (en) 1997-05-15 2005-02-08 Fci Americas Technology, Inc. Shroud retention wafer
US6485330B1 (en) * 1998-05-15 2002-11-26 Fci Americas Technology, Inc. Shroud retention wafer
US20060104743A1 (en) * 2004-09-30 2006-05-18 Illinois Tool Works, Inc. Flute positioner
WO2009015926A1 (en) * 2007-07-27 2009-02-05 Robert Bosch Gmbh Elongate component having an inner conductor
US20100266362A1 (en) * 2007-11-30 2010-10-21 Phoenix Contact Gmbh & Co. Kg Connecting flange, particularly for an electric terminal
US8485768B2 (en) * 2007-11-30 2013-07-16 Phoenix Contact Gmbh & Co. Kg Connecting flange, particularly for an electric terminal

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