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US3336570A - Multiple element member and method of making the same - Google Patents

Multiple element member and method of making the same Download PDF

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Publication number
US3336570A
US3336570A US342504A US34250464A US3336570A US 3336570 A US3336570 A US 3336570A US 342504 A US342504 A US 342504A US 34250464 A US34250464 A US 34250464A US 3336570 A US3336570 A US 3336570A
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US
United States
Prior art keywords
ring
opening
insulating
metallic
contact
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
US342504A
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English (en)
Inventor
Tuchel Ulrich
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.)
Allied Corp
Original Assignee
Individual
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Publication date
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Publication of US3336570A publication Critical patent/US3336570A/en
Assigned to ALLIED CORPORATION A CORP. OF NY reassignment ALLIED CORPORATION A CORP. OF NY ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BUNKER RAMO CORPORATION A CORP. OF DE
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
    • H01R9/00—Structural 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
    • H01R9/16—Fastening of connecting parts to base or case; Insulating connecting parts from base or case
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/40—Securing contact members in or to a base or case; Insulating of contact members
    • H01R13/405—Securing in non-demountable manner, e.g. moulding, riveting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/20—Connections with hook-like parts gripping behind a blind side of an element to be connected
    • F16B2200/205—Connections with hook-like parts gripping behind a blind side of an element to be connected the hook being a separate retainer
    • 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
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49925—Inward deformation of aperture or hollow body wall
    • Y10T29/49934—Inward deformation of aperture or hollow body wall by axially applying force

Definitions

  • the present invention relates to a multiple element member, especially a connector, and particularly to an electrical plug-type connect-or, comprising an element made of insulating material and a metallic element.
  • the insulating member is preferably made of plastic and the metallic element serves as an electric contact piece, such as a contact blade.
  • Members of this type generally comprise a multiplepiece insulating body, particularly an insulating body made of two pieces.
  • the insulating body is constituted by two plastic pieces which are elongated and which are provided, at the faces at which the two pieces are brought together, with openings which, when the two pieces are in fact assembled, form a row of openings, such as slots, which pass through the insulating body.
  • Connectors are usually made by closing the two insulating pieces about a desired number of metallic contact elements which fit into the openings formed when the two insulating pieces are brought together.
  • the contact pieces and the openings of the insulating body are provided with suitable recesses, shoulders and/or ledges which are so arranged that the contact elernents will be firmly anchored to the insulating body, with special attention being given to so arranging the shoulders, etc., as to prevent longitudinal displacement of the contact pieces within their respective openings.
  • the contact pieces have at least two regions of different width and/ or thickness; one of the regions projecting out of one end of the opening serves as the contact prong or blade and another region projecting out of the other end of the opening serves as an eye portion to which a lead may be soldered. These two regions will generally be made to have difierent thicknesses or widths.
  • the primary object of the present invention to provide a structural entity and especially a connector which overcomes the above drawbacks, namely, to provide a connector which is suitable for use under highhumidity conditions as well as for use under conditions which require the connector to remain resistant to breakdown as well as to leakage currents, which connector, however, incorporates a unitary, i.e., single-piece, insulating element and which is susceptible to being mass-produced by manufacturing techniques which are at least as simple as those used to manufacture existing connectors.
  • the present invention resides, essentially, in a structure in which the metallic element, i.e., the actual contact-making element if the structure is an electrical connector, is, preferably, a flat contact blade, and has at one end, preferably the thinner and/ or narrower end, at least one and preferably two opposite recesses, the contact element being held in place within the insulating element by means of a ring which is initially flat but is then deformed out of its plane into a wedge-shaped configuration such that the ring is made to enter the cut-out or cut-outs of the contact element, the thus-deformed ring being received in a suitably configured portion of the opening within which the contact element is located.
  • the metallic element is effectively anchored in the insulating element to prevent longitudinal displacement in at least one direction, longitudinal displacement in the other direction being prevented, generally, by the provision of' interengaging shoulders with which the metallic and insulating elements are provided.
  • the present invention further resides in a method for making a structural entity of the above type, which method comprises the steps of first placing the metallic element in the insulating element, then slipping the retaining ring, while the same is substantially flat, over the end of the metallic element until the ring is in alignment with the lateral cut-outs with which the metallic element is formed, and finally deforming the ring out of its flat configuration thereby to impart to the ring its wedge-shaped configuration and simultaneously to draw the ring at least partly into the recesses of the metallic element.
  • FIGURE 1 is a sectional view of a multiple element connector according to the present invention, the retaining ring being shown in the position it occupies after having been slipped over the lower end of the contact element (as viewed in the figure) but not yet deformed into its final configuration.
  • FIGURE 2 is a bottom view of the contact element and retaining ring shown in FIGURE 1.
  • FIGURE 3 is a fragmentary sectional view essentially similar to FIGURE 1, but showing the retaining ring in its final configuration.
  • FIGURES 4, 5, and 6 are plan views of modified embodiments of the retaining ring usuable in the connector according to the present invention.
  • FIGURE 7 is an elevational, cross-sectional view of another embodiment according to the present invention.
  • FIGURE 8 is a view similar to that of FIGURE 7 of a further embodiment according to the present invention.
  • FIGURE 9 is an elevational view with a portion of the insulating body removed, of a yet further embodiment according to the present invention.
  • FIGURE 10 is a view similar to that of FIGURE 9 of a still further embodiment according to the present invention.
  • FIG. 1 shows a connector incorporating an elongated insulating body 1 made of plastic and provided with slots 2 passing through the body.
  • the upper end of each of the slots is provided with two opposite shoulders 3 and 4, while the lower end of each slot is provided with a wedge-shaped edge 5.
  • Arranged within one of the slots 2 is the flat metallic contact element 6 having a wide upper end portion 7 fashioned as a contact blade, and a narrow lower end portion 8 which serves as the eye portion to which a lead may be soldered.
  • the juncture of the upper and lower end portions results in the formation of two opposite shoulders 9 which, when the contact element is inserted into the slot 2 from above, come to sit on the shoulders 3 and 4.
  • the lower end portion 8 of the contact element is provided with two opposite recesses or cut-outs 11 which are easily formed during the stamping operation by which the contact element 6 is made.
  • the retaining ring 10 shown in bottom plan view in FIGURE 2 as being of rectangular configuration, is slipped over the lower end portion of the contact element, in the direction of arrow A, until it comes to abut against the wedge-shaped opening 5. This is the position of the ring illustrated in FIGURE 1, which also shows that when the ring is in such position, it is in alignment with the cut-outs 11.
  • the assembly of the connector is then completed as follows: the prongs of a bifurcated tool (not shown) are placed against the middle of the two long shank portions 10a of the ring 10the areas 12 at which the ring is contacted by the prongs being indicated by phantom linesand the ring 10, which is made of any suitable material susceptible to being worked cold, is then deformed by means of a blow applied to the tool in the direction indicated by arrow A, i.e., upwardly as viewed in FIG- URE 1.
  • the contact element 6 is securely anchored within the insulating element 1, longitudinal movement of the contact element 6 in downward direction being prevented by the interengagement of the shoulders 3, 4, and 9, and longitudinal movement of the contact element 6 in upward direction being prevented by the ring 10 whose engaging portions 10b are in the recesses 11 and whose now wedge-shaped portions 10a bear against the wall of the wedge-shaped receiving portion 5 of the slot 2.
  • a connector having a one-piece insulating body With the physical interconnection between the metallic and insulating element being such that there is no possibility for any capillary passages to form, thereby preventing the formation of leakage paths through the interior of the insulating carrier, so that the above-discussed drawbacks of the prior art connectors are avoided.
  • Such leakage paths as tend to form at the outside of the insulation are rendered less effective by the provision of wedge-shaped protuberances 20 interposed between the slots 2.
  • the present invention is not limited to connectors using flat contact elements.
  • the contact element may be a pin or a tube and both it and the opening receiving the same may have a circular or oval cross section.
  • the cross-sectional configuration of the central opening of the retaining ring is adapted to the cross section of the contact element.
  • the outer cross-sectional configuration of the ring can likewise be adapted to, i.e., be similar (in the geometric sense) to, the inner cross-sectional configuration, but need not necessarily be.
  • the ring can be provided with an elongated central opening but have a circular outer configuration, as illustrated in FIGURE 4 which shows a ring 20 having a circular outer circumference but a rectangular central opening 20a.
  • FIGURE 5 shows a ring 30 whose outer periphery as well as whose central opening 30a are circular.
  • the circular ring 40 whose central opening 40a is rectangular, has a specially provided outer region 41 whose diameter is greater than that of the portion 5 of opening 2 of the insulating element 1 within which it is to be received. Consequently, when the ring 40 is struck to assume its final configuration (cf., FIGURE 3) a turned-over flange-like border is formed which fits tightly against the wall of opening 5.
  • Such a turned-over flange can serve several purposes. For one thing, the flange is accessible from the outside and can therefore serve as a foothold for a tool introduced into the opening 5 for purposes of removing the ring. In this way, the anchoring of the contact element is a detachable one.
  • FIGURE 7 which is taken along a plane perpendicular to the plane of FIGURE 1, shows an assembled arrangement of a contact element 6 with a retaining ring 40 of the type shown in FIGURE 6. Because the element 40 has a circular outer periphery, the opening 5 in this embodiment should also be circular. In addition, since the outer diameter of portion 41 is larger than the diameter of cylindrical opening 5, this portion 41 will be deflected downwardly, when the ring 40 is forced into opening 5', into a position opposite the recesses in element 6. Since the ring 40 is to be bent along the lines a of FIGURE 6, the metallic element 6 of this embodiment has its recesses formed in its large lateral surfaces, these surfaces being at right angles to the plane of FIGURE 7.
  • the ring 40 When the ring 40 is in position, its outer edges will bear against the conical, or wedge-shaped, upper surface of opening 5'.
  • the ring may then be formed, in a manner similar to that described above in connection with the embodiment of FIGURES l to 3, by striking the ring upwardly in the vicinity of the lines a. This will cause the ring to fold along these lines so that the long edges of opening 40a (FIGURE 6) will be moved into the recesses formed in metallic element 6. Because of the inherent resiliency of the portion 41 of ring 40, this portion will continue to bear against the cylindrical wall of opening 5'. In addition, the bending of element 40 will cause the portions of region 41 which are in line with the bending lines a to fold inwardly away from the wall of opening 5.
  • region 41 will thus present footholds for a removal tool.
  • the region 41 can be so fashioned as to bend over the other way to provide a nondetachable double-anchoring if the opening 5 of slot 2 is provided with an inwardly extending ring 18 (FIGURE 1) behind which the flange is formed.
  • the retaining ring itself can thus serve to provide a fastening which prevents movement of the contact element in both directions.
  • This type of anchoring is, however, generally not needed if the contact element is, as described above, provided with shoulders 9 which seat on shoulders 3 and 4 of the insulating body 1.
  • FIGURE 8 Such an arrangement is shown in the cross-sectional View in FIGURE 8 and includes a ring 40 which is initially identical in form to the ring shown in FIGURE 6.
  • This ring is provided with a region 41 which is bent upwardly in a manner illustrated prior to insertion into the ring-receiving opening in insulating body 1.
  • Insulating body 1 is provided with an inwardly extending ring 18 of the type described above in connection With FIGURE 1. Since this ring 18 is of the same plastic material as body 1 and is relatively thin, the ring 40 can easily be forced therepast and into position opposite the recesses provided in metallic contact element 6', this contact element differing from the element 6 in that it is not provided with shoulders 9.
  • the recesses in the element 6' are also formed in the large lateral surfaces of that element.
  • the outer ends of region 41 will bear against the conical surface of the ring-receiving opening-so that, when the ring 40 is upstruck in the manner described above, the ring will be prevented from moving upwardly as a whole and will therefore deform in the manner illustrated so that the long sides of openings 40:: move into the recesses provided in contact element 6.
  • the resulting assembly will have the configuration shown in FIGURE 8, wherein the upper extremity of region 41 prevents upward longitudinal movement of contact element 6' and the lower extremity of region 41, which is opposite ring 18, prevents downward movement of the contact element.
  • the lines a in FIGURES 4 and 6 show the position of the crest of the retaining ring, after the same has been bent into the wedge shape, with respect to the central opening thereof.
  • This crest can be parallel or at right angles to the long axis of the rectangular central opening.
  • FIGURE 9 is an elevational view of another arrangement according to the present invention in which portion of body 1 is removed to show the other parts of the assembly.
  • the assembly includes a contact element 6 of the type shown in FIGURES l and 3, an insulating body 1 having an opening 5' provided with a conical receiving portion, and a retaining ring 20 of the type shown in FIGURE 4.
  • the retaining ring 20 is inserted into the opening 5' with its opening 20a in alignment with the recesses provided in the narrow lateral edges of contact element 6.
  • FIGURE 10 is a view similar to that of FIGURE 9 and in which the contact element 6" has a tubular portion 7' and a round pin portion 8' provided with an annular recess, as indicated by phantom lines.
  • the element 30, which is shown in plan view in FIGURE 5 is upstruck the portions of opening 30a which are perpendicular to the line along which the retaining ring is bent will be forced into the annular recess in portion 8.
  • a single insulating body 1 which may be made by injection, casting, pressing or other molding processes, can have a number of contact elements arranged on one side, all of which are inserted into respective slots 2 in one operation.
  • the means for introducing the retaining rings are arranged on the opposite side. These rings can be inserted eitherv successively or simultaneously. The inserted rings can then be deformed, either consecutively or simultaneously, by a suitable press or striker mechanism, or set of presses and striker mechanisms. In this way the entire connector can be easily assembled by machine. This, too, renders the connectors susceptible for use as miniature components, the manual assembly of which requires, a very high degree of accuracy, generally not-realizable by other than highly skilled labor.
  • the cut-outs 11 can be differently configured to meet the needs of the situation; for example, they can be in the form of notches. Also, it is possible to impart the wedge-shaped configuration to the retaining ring by striking the same at but one point. Furthermore, the metallic contact element can be held in place by two retaining rings, one at each end. While this would require some additional manufacturing steps, the same may be justified if the contact element is made of very expensive material so that the saving of such materialby the omission of the shoulder arrangement, for example-would more than compensate for the provision of the two retaining rings.
  • the present invention limited to electrical connectors, since the above-described retaining ring arrangement may be used generally to anchor a metallic element in an insulating or plastic element.
  • the anchoring may be used to avoid the difficulties incident to mounting the metallic element in the plastic element while the latter is still in deformable state.
  • a structural entity comprising, in combination: a one-piece element made of insulating material provided with an opening; a metallic element arranged in said opening; and a thin retaining ring surrounding said metallic element and securing said elements to each other; said opening of said insulating element having a receiving portion and said metallic element having at least one recess; said retaining ring having at least one substantially flat portion lying in a plane transverse to the longitudinal axis of said opening and extending at least partly into said at least one recess of said metallic element, and a bent portion having a V-shaped cross section in at least one plane parallel to such longitudinal axis, said bent portion being disposed in said receiving portion of said opening, thereby to prevent movement of said metallic element, relative to said insulating element, in at least one direction.
  • a structural entity comprising, in combination: a one-piece element made of insulating material provided with an opening; a metallic element arranged in said opening; and a deformable retaining ring surrounding said metallic. element and securing said elements to each other; said opening of said insulating element having a receiving portion and said metallic element having at least one recess; said retaining ring, which, while in its originally flat condition, was placed into said opening to be in alignment with said recess and was thereafter deformed out of its plane to assume a wedge-shaped configuration, having a portion which is in said receiving portion of said opening and another portion which is at least partly in said recess of said metallic element, thereby to prevent movement of said metallic element, relative to said insulating element, in at least one direction.
  • said ring has an outer dimension greater than the size of said receiving portion of said opening and is provided with a turned-over flange portion at least a part of which intimately engages the surface of said receiving portion.
  • a connector comprising, in combination: a onepiece element made of insulating material and provided with an opening; an elongated metallic contact element extending through said opening; and a thin retaining ring surrounding said contact element and securing said elements to each other; said opening of said insulating element having a receiving portion and said contact element having a pair of lateral recesses arranged opposite each other; said retaining ring having two substantially flat portions lying in a plane transverse to the longitudinal axis of said opening and each extending at least partly into a respective one of said pair of recesses of said contact element, and a bent portion having a V-shaped cross section in at least one plane parallel to such longitudinal axis, said bent portion being disposed in said receiving portion of said opening, thereby to prevent longitudinal displacement of said contact element, relative to said insulating element, in at least one direction.
  • a connector comprising, in combination: a onepiece element made of insulating material provided with an opening; an elongated metallic contact element extending through said opening; and a deformable retaining ring surrounding said contact element and securing said elements to each other; said opening of said insulating element having a receiving portion and said contact element having at least one lateral recess; said retaining ring,
  • An electric connector comprising, in combination: a one-piece element made of insulating material and provided with a plurality of openings; a plurality of elongated metallic contact elements extending through said openings, respectively; and a plurality of deformable retaining rings each surrounding a respective contact element and securing the same to said insulating element; each opening of said insulating element having a receiving portion and each contact element having a pair of lateral recesses arranged opposite each other; each retaining ring, which, while in its originally fiat condition, was placed into a respective opening to be in alignment with the pair of recesses of the respective contact element and was thereafter deformed out of its plane to assume a wedgeshaped configuration, having a wedge-shaped portion which is in the receiving portion of the respective opening and two opposite engaging portions which are at least partly in the two recesses of the respective contact element, thereby to prevent longitudinal displacement of said contact elements, relative to said insulating element, in at least one direction.
  • a method of making a structural entity comprising the steps of: providing a one piece element made of insulating material and having an opening; placing a metallic element having at least one recess in said opening; thereafter placing a retaining ring, while the same is substantially flat, about said metallic element and into said opening to be in alignment with said recess of said metallic element; and thereafter deforming said ring out of its fiat configuration to impart to said ring a wedgeshaped configuration, thereby simultaneously to draw one portion of said ring at least partly into said recess of said metallic element.
  • a method of making a connector comprising the steps of: providing a one-piece element made of insulating material and having an opening; placing an elongated metallic contact element having a pair of lateral recesses arranged opposite each other in said opening; then placing a retaining ring, while the same is substantially fiat, about said contact element and into said opening so that the ring lies in a plane common to said two recesses; and thereafter deforming said ring out of its fiat configuration to impart to said ring a wedge-shaped configuration, thereby simultaneously to draw two engaging portions of said ring at least partially into said two recesses of said contact element.
  • a method of making an electric connector comprising the steps of: providing a one-piece element made of insulating material and having a plurality of openings; disposing a plurality of contact elements, each having a pair of lateral recesses arranged opposite each other, in said openings; then simultaneously placing each of a plu rality of retaining rings, while each is substantially fiat, about a respective one of said contact elements and into the respective openings so that each ring lies in a plane common to the two recesses of its respective contact element; and thereafter simultaneously deforming each of said rings out of its flat configuration to impart to each respective ring a wedge-shaped configuration, thereby simultasneously drawing two engaging port-ions of each ring at least partly into the two recesses of its respective contact element.

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US342504A 1963-02-06 1964-02-04 Multiple element member and method of making the same Expired - Lifetime US3336570A (en)

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Application Number Priority Date Filing Date Title
DET0023441 1963-02-06

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US3336570A true US3336570A (en) 1967-08-15

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US (1) US3336570A (de)
CH (1) CH425938A (de)
DE (1) DE1490757B2 (de)
GB (1) GB1047825A (de)
NL (2) NL6400859A (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3408891A (en) * 1966-01-21 1968-11-05 Hilti Ag Anchor pin and guide disk construction
US3437417A (en) * 1965-12-28 1969-04-08 Bassani Spa Assembly method for electrical devices
US3812895A (en) * 1970-02-17 1974-05-28 Dayton Progress Corp Fastener and retainer assembly
US4274700A (en) * 1977-10-12 1981-06-23 Bunker Ramo Corporation Low cost electrical connector
US4413493A (en) * 1981-01-05 1983-11-08 Edward Meinsen Frangible lock apparatus
US4566750A (en) * 1982-07-12 1986-01-28 Hideo Umezu Plastic insert-mold element containing a metal-piece insert
US5356341A (en) * 1991-07-25 1994-10-18 Gkn Automotive, Inc. Encapsulated spring for a mechanical joint
US5588882A (en) * 1995-04-28 1996-12-31 Helms-Man Industrial Co., Ltd. Wall socket with twist lock prongs

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2315484C2 (de) * 1973-03-28 1983-03-10 Siemens AG, 1000 Berlin und 8000 München Messerleiste
DD204356A1 (de) * 1982-03-25 1983-11-23 Sondershausen Elektro Kontaktstift
DE19738654A1 (de) * 1997-09-04 1999-03-11 Nokia Deutschland Gmbh Kontaktstecker
DE19812501C1 (de) * 1998-03-21 1999-06-24 Helms Man Ind Co Ltd Steckervorrichtung

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US799156A (en) * 1904-01-18 1905-09-12 Stromberg Carlson Telephone Flange for rods.
US1249948A (en) * 1914-06-25 1917-12-11 Hydraulic Pressed Steel Company Process of uniting articles to sheet-metal supports.
US1280302A (en) * 1916-01-06 1918-10-01 Charles H Richardson Boot or shoe calk.
US1897253A (en) * 1932-02-23 1933-02-14 Gen Motors Radio Corp Radio coil and shield mounting
US1952483A (en) * 1930-11-12 1934-03-27 Wylie G Wilson Mechanical lock
US2421115A (en) * 1943-02-05 1947-05-27 Frank L Lindstrom Method of securing laminations on a rotor shaft
US2757945A (en) * 1956-03-07 1956-08-07 Robert W Bingham Sealed pipe joint and method of making the same
US3172721A (en) * 1965-03-09 Electrical connector contact and insulator retention system

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3172721A (en) * 1965-03-09 Electrical connector contact and insulator retention system
US799156A (en) * 1904-01-18 1905-09-12 Stromberg Carlson Telephone Flange for rods.
US1249948A (en) * 1914-06-25 1917-12-11 Hydraulic Pressed Steel Company Process of uniting articles to sheet-metal supports.
US1280302A (en) * 1916-01-06 1918-10-01 Charles H Richardson Boot or shoe calk.
US1952483A (en) * 1930-11-12 1934-03-27 Wylie G Wilson Mechanical lock
US1897253A (en) * 1932-02-23 1933-02-14 Gen Motors Radio Corp Radio coil and shield mounting
US2421115A (en) * 1943-02-05 1947-05-27 Frank L Lindstrom Method of securing laminations on a rotor shaft
US2757945A (en) * 1956-03-07 1956-08-07 Robert W Bingham Sealed pipe joint and method of making the same

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3437417A (en) * 1965-12-28 1969-04-08 Bassani Spa Assembly method for electrical devices
US3408891A (en) * 1966-01-21 1968-11-05 Hilti Ag Anchor pin and guide disk construction
US3812895A (en) * 1970-02-17 1974-05-28 Dayton Progress Corp Fastener and retainer assembly
US4274700A (en) * 1977-10-12 1981-06-23 Bunker Ramo Corporation Low cost electrical connector
US4413493A (en) * 1981-01-05 1983-11-08 Edward Meinsen Frangible lock apparatus
US4566750A (en) * 1982-07-12 1986-01-28 Hideo Umezu Plastic insert-mold element containing a metal-piece insert
US5356341A (en) * 1991-07-25 1994-10-18 Gkn Automotive, Inc. Encapsulated spring for a mechanical joint
US5588882A (en) * 1995-04-28 1996-12-31 Helms-Man Industrial Co., Ltd. Wall socket with twist lock prongs

Also Published As

Publication number Publication date
CH425938A (de) 1966-12-15
GB1047825A (en) 1966-11-09
NL6400859A (de) 1964-08-07
DE1490757A1 (de) 1969-07-31
DE1490757B2 (de) 1971-12-16
NL127973C (de) 1900-01-01

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