US3693136A - Electrical plug contact - Google Patents

Electrical plug contact Download PDF

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Publication number
US3693136A
US3693136A US9636A US3693136DA US3693136A US 3693136 A US3693136 A US 3693136A US 9636 A US9636 A US 9636A US 3693136D A US3693136D A US 3693136DA US 3693136 A US3693136 A US 3693136A
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US
United States
Prior art keywords
prong
receptacle
male
arcuate
female
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
US9636A
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English (en)
Inventor
Arthur I Appleton
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.)
Emerson Electric Co
Original Assignee
Individual
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
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3693136A publication Critical patent/US3693136A/en
Assigned to EMERSON ELECTRIC CO., A CORP. OF MO. reassignment EMERSON ELECTRIC CO., A CORP. OF MO. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ARTHUR I. APPLETON
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • H01R13/15—Pins, blades or sockets having separate spring member for producing or increasing contact pressure

Definitions

  • ABSTRACT Electrical plug connectors of the male type which are adapted to be matingly inserted into a female portion, wherein the male includes spring-biased, captive ball shaped members, preferably made of an insulating material such as a borosilicate glass for urging the male member against the corresponding arcuate contact surface of the female socket to which it is inserted with a relatively even distributed pressure, so that a substantial area of current contacting interface results.
  • the male portion includes two different radii of curvature, at least one forming an arcuate contact surface in cross-section which subtends an arc of less than 180.
  • This invention relates primarily to the field of electrical connections and connectors, and more specifically, to improved plug connectors for making an electrical connection with a consistent and low voltage drop thereacross.
  • Connectors of the multi-conductor type are most often used in conjunction with the transmission of small quantities of current. Typical applications include sensing equipment, measuring equipment, and other forms of delicate instrumentation where it is important that connectors do not transmit electrical noise which might disturb readings, etc. Also, there should not be a large and/or inconsistent voltage dropacross the various connections made by the multi-conductor, and all the connectors of a given size. in a manufacturers line should be relatively consistent in voltage drop.
  • the female receptacle is produced from tubular copper stock which is cut to length and then longitudinally slit at what will laterbe in connection end to achieve flexibility and thereby provide for slight variability of the hole size.
  • a separate peripherally extending spring is used to bias the opposed halves or quarters of the partially slit tubing toward one another in order to ensure that there will always be some pressure exerted on the prong. It will be understood, however, that due to tolerancesthe inner diameter of the tubing must initially be slightly larger than the outer diameter of the prong or a possible interference fit would result. Thus, this construction also exhibits line contact at best, and possibly only multiple point contact.
  • the slotting operation usually leaves some burrs within the inner diameter of the tubing. If the tubing has a smaller diameter, these burrs normally are not removed, nor can they be removed with ordinary manufacturing techniques, if at all.
  • the present invention minimizes or solves the problems discussed above by utilizing a male element with a contacting surface of identical mating shape to that of the receptacle so that there is an appreciable area of contact between plug and receptacle and novel captive biasing means carried by the plug for urging it against the receptacle.
  • the male plug portion includes at least one conductive element which has a contact surface of somewhat less than semicircular shape in cross section which is easily formed and plated.
  • the connector in fact makes two connections instead of the usual one, it would be expected that the total millivolt loss across the entire connector assembly would be much larger than the loss experienced in known connectors having only one connection. However, the contact resistance is so low with these improved connections that the double connection yields less total resistance thereacross than the single connection of these other known connectors.
  • the entire effect is due to the nature of the contactingsurfaces which lessens contact resistance and not to the bulk resistance because the component elements within the subject connectors are not any larger than known commercial constructions. Beyond having both less voltage drop and a more consistent voltage drop between all of the electrical connections in a connector assembly, the connector actually has, in some forms, less voltage drop between its extreme axial ends then a similar length of the same wire with which the connector is recommended.
  • a plug connector is disclosed herein that is particularly easy to work with and which exhibits both consistent and very low voltage drop.
  • the individual plug connection presents an extremely close fitting interface to afford a substantial area of common contact, with the receptacle and the connection made exhibits a minimun of electrical noise.
  • FIG. 1 is a partially cut away perspective view of a male connector embodying the features of the present invention
  • FIG. 2 is a cross-sectional view of the connector shown in FIG. 1, taken substantially along the line 2-2 of FIG. 1;
  • FIG. 3 is a side elevation view of another form of the male connector shown in FIG. 1;
  • FIG. '4 is a view taken substantially along the line 4- 4 of FIG. 3.
  • FIGS. 1 and 2 a male portion of an examplary connector in accordance with the present invention usable with a tubular female having an internal contact surface of circular cross-section (not shown).
  • the male member includes a body 12 of generally cylindrical shape, having a prong portion 11 extending axially outwardly for engagement with the receptacle socket with which it is to be used.
  • a longitudinally extending opening adapted to receive the insulation-striped end 14 of a conductor 16.
  • the prong portion is provided with radially outwardly biased captive mounted balls 18, which are adapted to be received within transversally extending bores 19, formed inas the prong portion 11, (FIG. 2).
  • the balls 18 are each restrained from entirely escaping out of the bore 19 by the formation of a lip 21 which is extruded from the prong material by means of a staking operation.
  • Resilient means (only one being shown in FIG. 2) herein shown as a spring 22 biases the ball 18 radially outward with respect to the outer periphery of the prong 11.
  • the cross-sectional shape of the prong is not circular, but, instead it is formed of two different radii, R1, and R2, generated from spaced apart axes and 24, respectively, and intersecting along a pair of lines 20.
  • the axis of the receptacle would be colinear with axis 23, and the radius of the mating female surface would be identical with the radius designated R1.
  • the mating female surface when a connection is made, would then be flush with the prong surface defined by radius R1 over the angle designated A" (this being less than and would continue around the prong along the dashed line 24 in FIG. 2.
  • Ball 18 has sufficient curvature and permissive travel, but its outermost portion juts outwardly and interferes with the receptacle during insertion. Being inwardly movable, it depresses upon initial insertion and rolls along the female contact surface until fully inserted. Thus, it causes no scraping or scoring of the wall of the female. The force of spring 22 maintains the proper contact pressure between the contacting surfaces.
  • a plug similar to that shown in FIG. 1 in that there is a body 26 of substantially cylindrical shape and prong portion 27 provided with radially outwardly biased captive mounted balls 28, which are received in bores 31 (FIG. 4).
  • the insulating material of which the balls are constructed is preferably a borosilicate glass, such as the products of Corning Glass Works sold under the tradename Pyrex, a glass that is resistent to heat, chemicals and electricity.
  • An electrical plug connector of the type incorporating a male prong which is adapted to be insertable into a female receptacle having a side wall and a con nection surface of arcuate shape in cross-section comprising, in combination, a plug body of substantially cylindrical shape adapted'to receive a conductor at one end and a substantially cylindrical prong portion at the opposite end, the prong portion having two different radii of curvature, at least one radius forming an arcuate connection surface in cross-section which subtends an arc of less than said prong arcuate shaped connection surface including substantially the same radius of curvature as the receptacle surface, and captive mounted biasing means including at least one spherical ball formed of an electrically insulating material, laterally movable and trapped within said prong and a resilient element for urging said spherical ball laterally outwardly to engage a receptacle side wall, the biasing means biasing a substantial portion of the length of the arcuate shape of said prong

Landscapes

  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
US9636A 1968-10-25 1970-02-09 Electrical plug contact Expired - Lifetime US3693136A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US77051868A 1968-10-25 1968-10-25
US963670A 1970-02-09 1970-02-09

Publications (1)

Publication Number Publication Date
US3693136A true US3693136A (en) 1972-09-19

Family

ID=26679710

Family Applications (1)

Application Number Title Priority Date Filing Date
US9636A Expired - Lifetime US3693136A (en) 1968-10-25 1970-02-09 Electrical plug contact

Country Status (4)

Country Link
US (1) US3693136A (de)
DE (2) DE1953301B2 (de)
FR (1) FR2021583A1 (de)
GB (1) GB1285608A (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3832674A (en) * 1972-12-11 1974-08-27 Mark Products Electrical connector
US4090761A (en) * 1976-03-26 1978-05-23 Compagnie Deutsch Connector with remote control locking system
US5480318A (en) * 1994-09-30 1996-01-02 Garrison; Dale E. Childproof electrical plug
US5500901A (en) * 1992-02-20 1996-03-19 Resistance Technology, Inc. Frequency response adjusting device
US9112307B2 (en) * 2012-11-06 2015-08-18 Souriau Connector locking system using a temperature responsive spring
US20190051998A1 (en) * 2016-02-26 2019-02-14 Hefei Sanyu Electric Co., Ltd Quick connect plug for cables

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4447110A (en) * 1982-04-15 1984-05-08 The Bendix Corporation Socket contact for an electrical connector
GB2120022B (en) * 1982-05-11 1985-08-29 Isc Alloys Ltd Electrical connector
US4904208A (en) * 1985-06-24 1990-02-27 Itt Corporation Connector system with modular socket insert assembly
CA1262760A (en) * 1985-06-24 1989-11-07 Lloyd James Powell Connector system with modular socket assembly
DE8914951U1 (de) * 1989-12-18 1991-04-18 Grote & Hartmann Gmbh & Co Kg, 5600 Wuppertal, De

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1134293A (fr) * 1952-02-21 1957-04-09 Fiche pour prise de courant
US3052867A (en) * 1958-11-12 1962-09-04 Burndy Corp Electrical connector
FR1368879A (fr) * 1963-06-26 1964-08-07 Lauravia S A Outillage de sécurité pour travail sous tension électrique

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1134293A (fr) * 1952-02-21 1957-04-09 Fiche pour prise de courant
US3052867A (en) * 1958-11-12 1962-09-04 Burndy Corp Electrical connector
FR1368879A (fr) * 1963-06-26 1964-08-07 Lauravia S A Outillage de sécurité pour travail sous tension électrique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Electrical Manufacturing, Steinberg, 11 1959, pp. 82 88. *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3832674A (en) * 1972-12-11 1974-08-27 Mark Products Electrical connector
US4090761A (en) * 1976-03-26 1978-05-23 Compagnie Deutsch Connector with remote control locking system
US5500901A (en) * 1992-02-20 1996-03-19 Resistance Technology, Inc. Frequency response adjusting device
US5480318A (en) * 1994-09-30 1996-01-02 Garrison; Dale E. Childproof electrical plug
US9112307B2 (en) * 2012-11-06 2015-08-18 Souriau Connector locking system using a temperature responsive spring
US20190051998A1 (en) * 2016-02-26 2019-02-14 Hefei Sanyu Electric Co., Ltd Quick connect plug for cables
US10553965B2 (en) * 2016-02-26 2020-02-04 Hefei Sanyu Electric Co., Ltd Quick connect plug for cables

Also Published As

Publication number Publication date
FR2021583A1 (de) 1970-07-24
GB1285608A (en) 1972-08-16
DE1953302B2 (de) 1972-06-15
DE1953302A1 (de) 1970-08-06
DE1953301A1 (de) 1970-07-02
DE1953301B2 (de) 1972-05-10

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Legal Events

Date Code Title Description
AS Assignment

Owner name: EMERSON ELECTRIC CO., A CORP. OF MO.

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:ARTHUR I. APPLETON;REEL/FRAME:004043/0926

Effective date: 19820322