US3181112A - Miniature contact elements of tubular profile for electric couplings of the plug andsocket type - Google Patents

Miniature contact elements of tubular profile for electric couplings of the plug andsocket type Download PDF

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Publication number
US3181112A
US3181112A US239845A US23984562A US3181112A US 3181112 A US3181112 A US 3181112A US 239845 A US239845 A US 239845A US 23984562 A US23984562 A US 23984562A US 3181112 A US3181112 A US 3181112A
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US
United States
Prior art keywords
plug
socket
contact
strips
tube
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
US239845A
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English (en)
Inventor
Bonhomme Francois Robert
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.)
Curtiss Wright Corp
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Curtiss Wright Corp
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Publication date
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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
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • 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
    • Y10T403/00—Joints and connections
    • Y10T403/49—Member deformed in situ

Definitions

  • miniature contact element means an element the transverse dimensions of which do not exceed 0.6 mm, and may be as small as 0.2 mm. and even less. The use of such elements in certain types of electric and electronic apparatus has been steadily increasing.
  • Such small dimensions involve problems which are extremely ditlicult to solve for practical purposes.
  • such contact elements in order to have good qualities, must have at least two, and preferably three, reliable points or areas of contact between the plug and the socket.
  • they must be as resilient as possible so as to take into account the tolerances of machining and they must permit a very great number of connecting and disconnecting operations without deterioration of the device.
  • surface protection such as by V3.11 electric coating of silver, gold, rhodium or an analogous substance adapted to the application that is being considered.
  • This protection is particularly d-ificult to obtain in the case of contact elements having a tubular profile of closed outline, the inner diameter of which is of course very small, because in this case the electrolyte or any other treatment bath cannot penetrate thereinto from one end to the other due to surface tension phenomena.
  • a principal object of my invention is to provide an electric element of this type which is better adapted to meet the requirements of practice than those known up to this time, especially from the point of view of safety of operation and of surface protection by an electrolytic coating.
  • the contact element is characterized in that, seen in end View, it has a closed tubular profile but that, over its length for cooperating with the other element of the electric coupling, the solid portions located in any transverse plane have a peripheral development smaller than 180 and have angular configurations variable from one section to the other.
  • This contact element has, in at least one transverse area thereof, a projection with aspect to said closed tubular profile intended to ensure a tight contact with the other element of the electric coupling.
  • This projection is turned inwardly when the element under consideration is a socket (intended to cooperate with a cylindrical plug), the transverse dimensions of which range between the inner transverse dimensions of the general cylindrical profile of the socket andthose of the inner cross section thereof at the level of said project-ion.
  • This projection is, on the contrary, turned out- Wardly when the element under consideration is a plug (intended to cooperate with a cylindrical socket), the inner transverse dimensions of which range between the xternal transverse dimensions of the general cylindrical outline of the plug and those of the external cross section thereof at the level of said projection.
  • FlG. 1 is an axial section of a tube adapted for the manufacture of a contact socket according to a first embodiment of the invention
  • FIG. 2 is a similar View of a modification
  • FlG. 3 is a side elevational view of the contact socket obtained from either of the tubes of FIGS. 1 and 2;
  • FIG. 4 is a plan view seen from under FIG. 3 and corresponding thereto;
  • FIGS. 5 and 6 are sectional views of the socket ele ment of FIGS. 3 and 4, respectively on the lines V--V and VIVI of FIG. 3;
  • FIG. 7 is a transverse sectional view of a socket according to a modification oi the construction of FIGS. 3 and 4;
  • FIG. 8 is a view similar to FlGpl but corresponding to another embodiment of the invention.
  • FIG. 11 is a view, similar to FIGS. 1 and 8, of a tube for making the contact socket according to a third embodiment of the invention.
  • FIGS. 12 and 13 are views similar to FIGS. 3 and 4, respectively, of a contact socket made from the tube of P16. ll; 7
  • FIGS. 15 and 16 show, similarly to FIGS. 3 and 4 respectively, a socket element made according to a fourth embodiment of the invention from a tube such as shown by FIG. 11;
  • PEG. 17 shows, similarly to FIGS. 12 and 15, a socket elem nt made, according to a fourth embodiment of the invention, also from the tube of FIG. 11;
  • FIG. 18 is an axial sectional view of a tube serving to manufacture a contact plug element according to the invention.
  • FlGS. 19 and 25 are an elevational view and a plane view, respectively, of a plug element made from the blank of FIG. 18;
  • FIGS. 21 to 23 show various profiles, difierent from circular ones, of the tubes shown by FIGS. 1, 2, 8, 11 and 18.
  • I start from a cylindrical tube 2 of a resilient metal such as an alloy of copper and beryllium, a bronze, or the like, the inner diameter b of which is slightly greater than the diameter a of plug element 1, said tube preferably being of circular cross section (FIGS. ,1, 2, 8 and 11) and I cut oil a portion of this tube of a length equal to the desired length of the socket element.
  • a resilient metal such as an alloy of copper and beryllium, a bronze, or the like
  • 1 form an inward annular projection 3 such that the inner di ameter of the tube at this level has a value 0 smaller than a. l
  • the wall of tube 2 is then cut oif over its whole length intended to cooperate with plug element 1, over at least 180 of its peripheral development, preferably by means of a cutting tool of suitable shape.
  • I may use two frustoconical cuttingtools (or milling tools) 4- and 5 the axes 6 and 7 of which are parallel to the axis of the tube and are preferably, as shown, located in the same plane as said axi (this plane being that of FIG. 3), the respective generatrices of these cutting tools that are closest to each other being substantially parallel to each other. I thus obtain two portions or strips 8 and 9, as shown by FIGS.
  • FIGS. 8 to 10 Similar arrangements, which will be hereinafter described, are shown in FIGS. 8 to 10, FIGS. 11 to 13,
  • a contact socket which, seen endwise (FIGS. 5 and 6), has a closed tubular outline but the solid portions of which, over the length thereof intended to cooperate with plug element 1, have a total peripheral development smaller than 180 and HHgUlELI CllSPOSIUODS which may differ from one portion to another.
  • These solid portions consist of the respective strips 8 and 9, of the junctions I2 and 13 of these strips, and of-longitudinal portion 11.
  • the socket has, at the level of the portion 3 of reduced diameter, a projection on every portion 8 and 9 intended to come into contact with plug element 1, which is further guided by ring 10 and bythe beginning of portion 11.
  • portions 8 and 9 maybe about 15 mm., their length 9 about 2mm. and the width 11 of ring portion lit) about 0.15.
  • I provide a socket element'by making in a single piece'two sockets analogous to that above described connected together by a junction 12a corresponding to twice junction portion 12 of the preceding example.
  • FIGS. 8 to 10 In a general manner the elements of FIGS. 8 to 10 that are identical to those of FIGS. 1 to. 4, are designated by the same reference numerals, sometimes followed by letters a or b.
  • I provide on tube 2 two annular constrictions 3a and 3b, and this tube is cut by means of two frustoconical cutting tools 5:: and 5b, the respective axes 7a and 7b of which are in line with each other, and of a bi-conical cutting tool 4a having its axis 6a parallel to axes 7a and 7b and located in the same plane as said axes and as the axis of tube 2.
  • I thus obtain two strips 8a and 9a at the level of constriction 3a and two strips 812 and 9b at the level of constriction 3b, the whole of these four strips being connected together as above stated by junction 12a.
  • On the other side strips 8a and 9a are connected to a portion 11 identical to that of FIGS.
  • FIGS. 11 to 13 differs from that of FIGS. 8 to 10 only by the provision of a fifth point of contact with plug element 1.
  • tube 3 is provided, in addition to constrictions 3a and 3b, with a third middle constriction 3c which, after milling operations analogous to that illustrated by FIG. 9, provides an inward projection on junction 12c which is analogous to the junction 12a of FIGS. 9 and 10.
  • This increases the flexibility of the socket element between its ends 11 to 14, and facilitates good electrical contact with the plug at the level of constrictions 3a and 3b despite the functional wear and tear and metal fatigue.
  • tube 2 is cut by means of tools having their axes parallel to the axis of the tube.
  • FIGS. 15 to 17 where the initial tube is'identical to that shown by FIG. 11.
  • FIGS. 15 and 16 I make use for instance of three milling tools 15a, 15b, and 16, the respective axes of which are perpendicular to the axis of tube 2, the middle planes of a cutting tool passing through this last mentioned axis.
  • Cutting tools 15a and 15b are located on the same side of this axis and cutting tool 16 on the other side, the transverse plane passing through the axis of cutting tool 16 being at equal distances from the transverse planes passing respectively through the axes of the two other cutting tools.
  • the oval shaped hole 18 provided by the middle tool 16 has its ends at the same longitudinal level as those of the oval shaped holes 17a and 17b provided by the end tools 15:: and 15b.
  • hole 18 is obtained, by a tool of greater diameter than those of the two other tools and over a greater length than holes 17a and 17b.
  • the solid portion consists as in the preceding embodiments of strips 19a,-19b, 20a, 2% between which the surface protection electrolyte can pass.
  • milling tools 15a, 15b and 16 may be spherical. Furthermore instead of parallel disposition of the axes of these tools, they may be offset by for instance with respect to the axis of tube 2.
  • tools 21a, 21b and 22 may use tools 21a, 21b and 22 having their respective axes perpendicular to the axisof tube 2, the distance k between the axes of the middle tool 22 and that of either of the extreme tools 21a and 21b being preferably smaller than the sum of the respective radii R and r of these tools.
  • FIG. I proceed as for making the sockets of FIGS. 1 to 17 with the difference that, instead of one or several constrictions such as 3, 3a, 3b and 30, I provide tube 2 with one or several portions of enlarged diameter such as the two portions 24a and 24b in the case of FIG. 18. I determine the whole in such manner that the external diameter m of the tube is smaller than said diameter l but that the external diameter n at the level of portions 24:: and 24b is greater than this diameter 1.
  • the initial tube is of circular cross section.
  • this cross section might have a different shape without modifying the principle of the invention, in particular the tube may have an oval shape (FIG. 21), an approximately triangular shape, (FIG. 22) or an approximately rectangular shape (FIG. 23).
  • a miniature electrical connector having plug and socket contact elements, one of said elements being formed of integrally united elemental portions of a conducting sleeve and comprising a ring defining the end for cooperating with the other contact element, a pair of spaced strips shaped as opposing side wall portions respectively, of the sleeve and extending at corresponding ends thereof from a common junction with said ring generally along and obliquely with respect to the longitudinal axis 2.
  • a socket element for receiving a pin-like plug contact said socket element being formed of integrally united elemental portions of a conducting sleeve, comprising a ring defining the socket entrance for guiding the plug contact, a pair of spaced strips shaped as opposing side Wall portions respectively, of the sleeve and extending at corresponding ends thereof from a common junction with said ring generally along and obliquely with respect to the longitudinal axis of the cylinder,-and a terminal strip extending parallel to said axis in alignment with a point on said ring generally opposite the aforesaid junction, at least one of said strips having a projection extending inwardly toward said axis for wiping contact engagement with said plug contact, and both strips at their other corresponding ends, having a common junction with said terminal strip.
  • a socket element for receiving a pin-like plug contact said socket element being formed of integrally united elemental portions of a conducting cylinder, comprising a ring defining the socket entrance for guiding the plug contact, a pair of spaced strips shaped as opposing side wall portions respectively, of the cylinder and extending at corresponding ends thereof from a common junction with said ring generally along and obliquely with respect to the longitudinal axis of the cylinder, the combined width of said strips at atransverse section representing less than of the corresponding periphery of said cylinder, and a terminal strip extending parallel to said axis in alignment with a point on said ring generally opposite the aforesaid junction, each strip having a projection extending inwardly toward said axis for Wiping contact engagement with said plug contact, and both strips at their other corresponding ends having a common junction with said terminal strip.
  • a socket element for receiving a pin-like plug contact, said socket element comprising a ring defining the socket entrance for guiding the plug contact, a pair of bowed spaced strips diverging at corresponding ends thereof from a common junction with said ring generally along and obliquely with respect to the longitudinal axis of the ring so as to conform to the corresponding plug surface, and a terminal strip extending parallel to 'said axis in alignment with a point on said ring generally opposite the aforesaid junction, at least one of said strips being deformed to provide a projection extending inwardly toward said axis for wiping contact engagement with said plug contact, and both strips at their other corresponding ends converging to make a common junction with said terminal strip.

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  • Manufacturing Of Electrical Connectors (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
US239845A 1961-11-24 1962-11-23 Miniature contact elements of tubular profile for electric couplings of the plug andsocket type Expired - Lifetime US3181112A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR879989A FR1314448A (fr) 1961-11-24 1961-11-24 Contacts électriques sub-subminiatures

Publications (1)

Publication Number Publication Date
US3181112A true US3181112A (en) 1965-04-27

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US239845A Expired - Lifetime US3181112A (en) 1961-11-24 1962-11-23 Miniature contact elements of tubular profile for electric couplings of the plug andsocket type

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US (1) US3181112A (it)
CH (1) CH388414A (it)
DE (1) DE1265807B (it)
FR (1) FR1314448A (it)
GB (1) GB1028473A (it)
NL (2) NL139631B (it)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3761871A (en) * 1971-05-28 1973-09-25 L Teurlings Electrical connector
US4025012A (en) * 1975-07-11 1977-05-24 Chan David M F Modular decorative structure
US4572606A (en) * 1983-11-25 1986-02-25 Otto Dunkel Fabrik fur Elektrotechnische Gerate Process for producing contact-spring bushes and a spring contact bush
US4679890A (en) * 1984-06-25 1987-07-14 American Telephone And Telegraph Company, At&T Bell Laboratories Connector contact terminal
US4886474A (en) * 1987-08-14 1989-12-12 Drogo Pierre L M Spindle-receiving jack for forming an electrical connection and electrical connector comprising at least one such jack
US7559779B1 (en) 2008-05-14 2009-07-14 Cinch Connectors, Inc. Electrical connector

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4090772A (en) * 1977-01-24 1978-05-23 International Telephone And Telegraph Corporation Low insertion force electrical connector
FR2450510A1 (fr) * 1979-02-28 1980-09-26 Souriau & Cie Perfectionnements aux jeux de contacts pour connecteurs electriques

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1684973A (en) * 1925-09-12 1928-09-18 Naylor Radio Corp Contact-protecting means for vacuum tubes
GB313322A (en) * 1928-06-21 1929-06-13 Conrad Beck Improvements in or relating to optical systems for projecting images on to screens
US2209734A (en) * 1939-09-28 1940-07-30 Nat Company Inc Electrical apparatus
FR881186A (fr) * 1942-04-13 1943-04-16 Dispositif d'accouplement à manchon élastique pour connexions électriques
US2450529A (en) * 1945-01-22 1948-10-05 H H Buggie & Company Method of making electrical socket connections
US2456764A (en) * 1945-04-30 1948-12-21 Mines Equipment Company Electrical connector
US2457796A (en) * 1944-10-10 1948-12-28 Jesse M White Method of forming and assembling connecting sleeves
US2467914A (en) * 1944-12-11 1949-04-19 E C Atkins And Company Pinch lock
US2644146A (en) * 1949-09-16 1953-06-30 Burndy Engineering Co Inc Detachable connector having two-point support
US2853691A (en) * 1956-01-25 1958-09-23 Mccord Jesse Lee Tune-up extension for use with spark plugs for testing purposes
US2944945A (en) * 1955-07-29 1960-07-12 Gen Motors Corp Electroplating

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE429869C (de) * 1926-06-04 Sigwart Ruppel Dipl Ing Gewellte Steckerhuelse

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1684973A (en) * 1925-09-12 1928-09-18 Naylor Radio Corp Contact-protecting means for vacuum tubes
GB313322A (en) * 1928-06-21 1929-06-13 Conrad Beck Improvements in or relating to optical systems for projecting images on to screens
US2209734A (en) * 1939-09-28 1940-07-30 Nat Company Inc Electrical apparatus
FR881186A (fr) * 1942-04-13 1943-04-16 Dispositif d'accouplement à manchon élastique pour connexions électriques
US2457796A (en) * 1944-10-10 1948-12-28 Jesse M White Method of forming and assembling connecting sleeves
US2467914A (en) * 1944-12-11 1949-04-19 E C Atkins And Company Pinch lock
US2450529A (en) * 1945-01-22 1948-10-05 H H Buggie & Company Method of making electrical socket connections
US2456764A (en) * 1945-04-30 1948-12-21 Mines Equipment Company Electrical connector
US2644146A (en) * 1949-09-16 1953-06-30 Burndy Engineering Co Inc Detachable connector having two-point support
US2944945A (en) * 1955-07-29 1960-07-12 Gen Motors Corp Electroplating
US2853691A (en) * 1956-01-25 1958-09-23 Mccord Jesse Lee Tune-up extension for use with spark plugs for testing purposes

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3761871A (en) * 1971-05-28 1973-09-25 L Teurlings Electrical connector
US4025012A (en) * 1975-07-11 1977-05-24 Chan David M F Modular decorative structure
US4572606A (en) * 1983-11-25 1986-02-25 Otto Dunkel Fabrik fur Elektrotechnische Gerate Process for producing contact-spring bushes and a spring contact bush
US4679890A (en) * 1984-06-25 1987-07-14 American Telephone And Telegraph Company, At&T Bell Laboratories Connector contact terminal
US4886474A (en) * 1987-08-14 1989-12-12 Drogo Pierre L M Spindle-receiving jack for forming an electrical connection and electrical connector comprising at least one such jack
US7559779B1 (en) 2008-05-14 2009-07-14 Cinch Connectors, Inc. Electrical connector

Also Published As

Publication number Publication date
DE1265807B (de) 1968-04-11
GB1028473A (en) 1966-05-04
CH388414A (fr) 1965-02-28
FR1314448A (fr) 1963-01-11
NL285881A (it)
NL139631B (nl) 1973-08-15

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