US3693133A - Fluid tight electric connector - Google Patents

Fluid tight electric connector Download PDF

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Publication number
US3693133A
US3693133A US77522A US3693133DA US3693133A US 3693133 A US3693133 A US 3693133A US 77522 A US77522 A US 77522A US 3693133D A US3693133D A US 3693133DA US 3693133 A US3693133 A US 3693133A
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US
United States
Prior art keywords
plug
stud
electric connector
tight electric
connector according
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
US77522A
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English (en)
Inventor
Jacques Harbonn
Jacques Garnier
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IFP Energies Nouvelles IFPEN
Original Assignee
IFP Energies Nouvelles IFPEN
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.)
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Application filed by IFP Energies Nouvelles IFPEN filed Critical IFP Energies Nouvelles IFPEN
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Publication of US3693133A publication Critical patent/US3693133A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/02—Surface sealing or packing
    • E21B33/03—Well heads; Setting-up thereof
    • E21B33/035—Well heads; Setting-up thereof specially adapted for underwater installations
    • E21B33/038—Connectors used on well heads, e.g. for connecting blow-out preventer and riser
    • E21B33/0385—Connectors used on well heads, e.g. for connecting blow-out preventer and riser electrical connectors
    • 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
    • H01R13/22—Contacts for co-operating by abutting
    • 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
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/523—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases for use under water

Definitions

  • This invention relates to a fluid tight electric connector of a new type providing for the tight connection between two electrical circuits placed in a fluid medium, particularly in a liquid medium which may be electrically conducting.
  • the electric connectors proposed up to now generally comprise two complementary members coated with or consisting of an elastomer. At the surface of said elastomer are placed electric studs or contact elements. Centering devices or interpenetrating plugs of complementary shapes of the two connection members provide an accurate positioning of the corresponding contact elements of said connection members.
  • connection members are of small size, the two connection members being then easily and with sufficient accuracy, positioned with respect to each other.
  • the assembling of the two connection members is usually made by hand and the pressing forces are relatively small and may reach a maximum of a few kilograms.
  • connection members to be assembled are very heavy and of a large size, e. g. of about one meter, provided with electric contact elements, the plugs or connectors of the above type are no longer satisfactory.
  • the clearances in the mechanical assembling reach values higher than one millimeter and do not permit a sufficiently accurate positioning of the two complementary members of the connector. It is therefore not possible to make use of interpenetrating contactors or of rigorous centering devices for positioning in front of each other the electric contact studs of each connector element.
  • the pressing force on the connection members being very high, e. g several hundreds of kilograms, results in a flow of the elastomer which is difficult to control and it has been observed that the electric connections were not always properly established.
  • the tight connector of this invention consisting of at least one pair of connection members each formed of a casing housing a plug of substantially incompressible deformable insulating material comprising a conducting stud projecting outside the plug above the free surface thereof, the electric connection being achieved by mere application on each other of the studs of the connection members in a position of closeness of the latter, by pressing against each other their respective deformable plugs, wherein the free surface of the deformable plug of each connection member protrudes from its housing above the edge thereof and wherein a recess is arranged around the plug in its housing, close to the edge thereof, leaving a space for the flow of said deformable material when the two connection members are pressed against each other, thereby ensuring the sealing and the electric insulation around each conducting stud.
  • FIG. 1 illustrates an example of use of an electric connector according to the present invention
  • FIG. 1A diagrammatically shows a distribution of the clearances during the assembling of large sized members
  • FIG. 2 shows one embodiment of connector according to the invention
  • FIGS. 3 to 6 illustrate the operation of assembling the two members of the connector of FIG. 2,
  • FIG. 7 illustrates a variant of assembling the two members of the connector of FIG. 2,
  • FIG. 8 shows another embodiment of connector according to the invention.
  • FIG. 9 is a variant of the connector of FIG. 8.
  • FIG. 1 shows an example of use of a connector of this invention on a submerged oil well head.
  • Reference 1 indicates the top block of the oil well head submerged at great depth, for example 200 or 300 meters on which operations are to be performed with the aid of a special device therefor diagrammatically shown with reference 2.
  • connection of device 2 to the top of the well head 1 is, for example, carried out in a known manner, by means of a coupling 3 secured on the end of device
  • This connection must allow the establishment of electric connections diagrammatically shown with reference 4, said electric connections being provided, for example, in order to ensure the continuity of the remote control circuits for actuation devices present on the well head or of telemetering circuits etc.
  • FIG. 2 illustrates an embodiment of connector according to this invention.
  • the connector comprises two identical connection members, only one of which is shown in FIG. 2.
  • This element to which is given the general reference 4 comprises a casing or rigid body 5 of any external shape adapted to the conditions of use of the connector.
  • a housing 6 Inside the body 5 is a housing 6 wherein is placed a plug 7 made of a deformable insulating material such as elastomer and which projects by a height In above the outer surface of the body 5.
  • a diameter reduction 9 of said plug 7 is provided at its upper part thus forming an annular groove or recess 10 between the plug 7 and the housing 6.
  • a stud or electrically conducting element I1 is partially driven in the plug 7 and projects by a height e above the plug surface.
  • a flexible conductor 12 for the current supply is connected to stud 11 through any known means.
  • the plug 7 of incompressible elastomer must not be prestressed when placed in position into the bore 6 of body 5 and the clearance between the diameter of the housing or bore 6 and the plug diameter must be from 0 to 0.1 millimeter preferably between 0 and 0.05 mm.
  • the volume of the annular groove 10 must be at leaSt equal to the volume of the protruding portion of plug 7.
  • the selection of the elastomer is not critical, but the best results have been obtained with the use of an incompressible elastomer having a sufficient hardness i.e hardness degree in shore units in the range from 50 to 75, preferably from 60 to 65.
  • the height h of the elastomer above the connector body is chosen at least equal to one half of the maximum clearance m (FIG. 1A) acceptable between the opposed surfaces of the members to be assembled.
  • FIGS. 3, 4 and 5 illustrate the operation of the embodiment of the invention shown in FIG. 1.
  • members 4 and 4a of the connector are positioned and fixed respectively in the top block 1 of the well head and in the coupling 3.
  • the bodies 5 and 5a of the connection members might be optionally omitted and the plugs 7 and 70 directly housed in the respective cavities of the top block 1 of the well head and of coupling 3.
  • the coupling 3 is brought closer and closer to the well head until the end surface 14 thereof comes into contact with the end surface 15 of the top block I of the well head, as shown in FIG. 5.
  • the corresponding pressing of the connection members against each other results in the flow of the elastomer of plugs 7 and 7a, which is made easier by the provision of recesses or grooves 10 and 10a.
  • the elastomer thus forms a sealing ring providing, in addition, a good electrical insulation about studs 11 and 11a.
  • FIG. 6 illustrates the case where, as a result of the accepted tolerances, the two end surfaces of the members to be assembled are not parallel. In such a case even after pressing of the members against each other, it still remains a slight clearance m which is lower than 2h, 1: being (FIG. 2) the protrusion of projection height of the elastomer plug above the connector body. Accordingly as shown in FIG. 6, there is still achieved a sufficient flow of the elastomer for ensuring the insulation and sealing about studs 1 l and 1 In.
  • a connector according to this invention may be used for establishing electrical connections between elements immersed in a liquid medium, even electrically conducting.
  • FIG. 7 illustrates a preferred embodiment of a connector according to the invention.
  • At least one of the connection members, e.g. 4a in FIG. 7, is rigidly locked onto coupling 3 by means of any known device such as an elastic stop ring of the circlip type 16, whereas the body 5 of the other member 4 may slide into the bore 17 of top block I, the protruding portion of member 4 with respect to block I being limited by a circlip 19, cooperating with a shoulder 20 of body 5.
  • An elastic device 18, shown in the drawing as a spring is interposed between the body 5 and the bottom of bore I7.
  • This elastic device is adapted to exert on the body 5 of element 4 a force substantially equal to the pressing force exerted for assembling members 3 and 4. Any clearance m between members 1 and 3 to be assembled is completely, balanced by the only sliding of member 4, if smaller than the sum of the protrusion height C, of body 5a of member 4a with respect to coupling 3 (which is non-existent in the embodiment of FIG. 7) and of the protrusion height C, of body 5 of member 4 with respect to top block 1 when the elastic device is not compressed.
  • the operation of the connector will always be convenient as long as clearance m is lower or at most equal to C, C, +2h,h being the protrusion height of elastomer plugs 7 and 7a respectively with respect to bodies 5 and 5a.
  • the selected height C is about I millimeter and the height h about I to L5 mm for members to be assembled having sizes of the order of one meter, on which are exerted pressing forces in the range of from about one hundred of kilograms to about one ton, the maximum acceptable clearance between surfaces 14 and 15 of members 1 and 3 being thus of about 4 mm, which limit is in fact never reached.
  • FIG. 8 shows another preferred embodiment of con nector according to this invention.
  • This phenomenon is due partly to the flow of the elastomer which under the high pressing forces applied thereon, comes to a position where it is interposed between the contact surfaces of the studs, and partly to the cylindrical shape of the studs which does not provide for an efiicient anchoring thereof in the elastomer plugs, thus making possible the flow of the whole mass of elastomer surrounding the cylindrical surface of the studs.
  • the plug is manufactured by direct vulcanization on the stud and the groove is obtained by machining a chamfered edge on body 5.
  • the elastic device 18 may consist of a pile of so-called Belleville" spring washers.
  • FIG. 9 shows an alternative embodiment of FIG. 8 with the surfaces of studs ll and 11a establishing the electrical contact.
  • the stud 11 has a plane contact surface and the stud 110 has a conical contact surface which can be impressed in stud 11.
  • the stud 11 may for example be made of lead and stud 11a of an aluminum alloy well known in the art under reference AG It will be understood that, while there has been given herein certain specific examples of the practice of this invention, it is not intended thereby to have this invention limited to or circumscribed by the specific details of materials, sizes, proportions or conditions herein specified in view of the fact that the invention may be modified according to individual preference or conditions without necessarily departing from the spirit and scope thereof, and consequently such modifications are properly, equitably and intended to be within the full range of equivalence of the appended claims.
  • a tight electric connector comprising two connection elements, each having at least one conducting stud embedded in a plug of deformable and substantially incompressible insulating material, the conducting stud protruding from the plug free surface, the electrical connection resulting from the contacting of the conducting studs at a close position of said connection elements, each stud being provided with an individual housing for the plug in which said stud is embedded, the free surface of the deformable plug protruding from its housing above the edge thereof and having a recess arranged at the periphery of the plug close to and extending below the edge of the housing to provide for the flow of said deformable material both into the recess and about the stud as a result of the pressing of said two connection elements against each other such that a seal and electrical insulation is provided about each conducting stud.
  • the plug wherein is made of substantially incompressible elastomer whose hardness degree, expressed in shore units, is between 50 and 75.
  • Tight electric connector according to claim 1 wherein the plug is made of substantially incompressible elastomer whose hardness degree, expressed in shore units, is between 60 and 65.
  • Tight electric connector according to claim 1 for establishing electrical connections between two connecting parts of large size, each connection element of said connector being carried on one of the connecting parts to be assembled, wherein an elastic device is in terposed between at least one of the connection elements and the connecting part carrying said element for biasing the connection element toward the other connecting part to be assembled.
  • Tight electric connector according to claim l, wherein said plug and said stud are connected by vulcanization.
  • a tight electric connector formed of at least one pair of connector members each comprising a casing wherein is housed a plug of deformable insulating material, substantially incompressible, comprising a conducting stud protruding from the plug free surface, the stud having a conical shape with an increasing diameter towards the inside of the plug and being extended by a cylindrical portion of a diameter lower than the greater diameter of the conical portion, the electrical connection resulting from the mere application of the connection member studs on each other in a position of closeness of said members, by pressing said deformable plugs against each other, wherein the free surface of the deformable plug of each connection member protrudes from its housing above the edge thereof and wherein a recess is arranged about the plug in its housing, close to the edge thereof, in order to leave a space for the flow of said deformable material which results from the pressing of said two members against each other, thereby ensuring the sealing and electrical insulation about each conducting stud.
  • a tight electric connector formed of at least one pair of connector members each comprising a casing wherein is housed a plug of deformable insulating material, substantially incompressible, comprising a conducting stud protruding from the plug free surface, the electrical connection resulting from the mere application of the connection member studs on each other in a position of closeness of said members, by pressing said deformable plugs against each other, the contact surface of the stud of one of said connection members is conical and the contact surface of the stud of the other is flat, wherein the free surface of the deformable plug of each connection member protrudes from its housing above the edge thereof and wherein a recess is arranged about the plug in its housing, close to the edge thereof, in order to leave a space for the flow of said deformable material which results from the pressing of said two members against each other, thereby ensuring the sealing and electrical insulation about each conducting stud.
  • a tight electric connector according to claim 15 wherein said stud having a conical contact surface is made of a conducting material of a greater hardness than that of which is made the stud having a plane surface.
  • Tight electric connector formed of two connection members having each an insulating plug of deformable material housed in an individual casing and projecting beyond the casing end surface, a stud embedded into said plug and projecting beyond the end surface of said plug, and an annular recess provided in at least one of said plug and said casing proximate to and extending below the casing end surface forming a space for the flow of the plug insulating material, occurring when the two connection members are pressed against each other.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Connector Housings Or Holding Contact Members (AREA)
US77522A 1969-10-08 1970-10-02 Fluid tight electric connector Expired - Lifetime US3693133A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6934485A FR2062051A5 (enrdf_load_stackoverflow) 1969-10-08 1969-10-08

Publications (1)

Publication Number Publication Date
US3693133A true US3693133A (en) 1972-09-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
US77522A Expired - Lifetime US3693133A (en) 1969-10-08 1970-10-02 Fluid tight electric connector

Country Status (7)

Country Link
US (1) US3693133A (enrdf_load_stackoverflow)
BE (1) BE756767A (enrdf_load_stackoverflow)
DE (1) DE2048578A1 (enrdf_load_stackoverflow)
ES (1) ES189373Y (enrdf_load_stackoverflow)
FR (1) FR2062051A5 (enrdf_load_stackoverflow)
GB (1) GB1305809A (enrdf_load_stackoverflow)
NL (1) NL7014744A (enrdf_load_stackoverflow)

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4146286A (en) * 1978-04-17 1979-03-27 Ford Motor Company Electrical connection apparatus and method
FR2605149A1 (fr) * 1986-10-13 1988-04-15 Sharp Kk Connecteur en caoutchouc
US4943243A (en) * 1988-10-21 1990-07-24 Appleton Arthur I Wire connector
US5120268A (en) * 1990-08-07 1992-06-09 Al Gerrans Marine electrical connector
US5542856A (en) * 1994-04-11 1996-08-06 Tescorp Seismic Products, Inc. Field repairable electrical connector
US5595497A (en) * 1995-03-01 1997-01-21 Tescorp Seismic Products, Inc. Underwater electrical connector
US5605468A (en) * 1995-11-22 1997-02-25 Tescorp Seismic Products, Inc. Electrical connector assembly having replaceable sleeve seal
US5641307A (en) * 1994-12-01 1997-06-24 Gerrans; Al Marine electrical connector
US5704799A (en) * 1994-04-11 1998-01-06 Tescorp Seismic Products, Inc. Field repairable electrical connector
US5711685A (en) * 1996-01-23 1998-01-27 Tescorp Seismic Products, Inc. Electrical connector having removable seal at cable entry end
WO1998017930A1 (en) * 1996-10-18 1998-04-30 Abb Offshore Systems Limited Piston and cylinder device with resilient seal
WO1998017892A1 (en) * 1996-10-18 1998-04-30 Abb Offshore Systems Limited Connector comprising a pair of pistons with mating surfaces
US5971783A (en) * 1998-03-16 1999-10-26 Northrop Grumman Corporation Button connector with safe front
WO1999062146A1 (en) * 1998-05-22 1999-12-02 Reipur Technology A/S Means for providing electrical contact
US20040221995A1 (en) * 2003-05-06 2004-11-11 Hall David R. Loaded transducer for downhole drilling components
US6830469B1 (en) * 2004-03-19 2004-12-14 Molex Incorporated Electrical connector assembly
US20050074988A1 (en) * 2003-05-06 2005-04-07 Hall David R. Improved electrical contact for downhole drilling networks
WO2007115070A3 (en) * 2006-03-31 2008-10-02 Azura Energy Systems Inc Sealed eurytopic make-break connector utilizing a conductive elastomer contact
US20100195853A1 (en) * 2007-10-16 2010-08-05 Estron A/S Electrical Connector for a Hearing Device
US20180351278A1 (en) * 2017-06-06 2018-12-06 Amphenol Corporation Spring loaded electrical connector
US10615530B2 (en) 2017-06-06 2020-04-07 Amphenol Corporation Spring loaded electrical connector

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3248336C1 (de) * 1982-12-28 1984-07-05 Fa. Carl Freudenberg, 6940 Weinheim Druckkontakt
DE4408652C2 (de) * 1994-03-15 1997-11-27 Gisewsky Karl Robert Dipl Ing Kabelsteckverbinder
GB2463837B8 (en) * 2007-06-27 2013-04-03 Gkn Aerospace Services Structures Corp In-situ electrical connector with composite structure

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2195189A (en) * 1937-06-19 1940-03-26 Kilborn Sauer Company Automobile lamp socket
DE1033752B (de) * 1955-11-28 1958-07-10 Siemens Ag Verbindungsanordnung mit Stirnkontakt fuer ein oder mehrere Leitungsdraehte
FR1554320A (enrdf_load_stackoverflow) * 1968-01-31 1969-01-17
NL6713298A (enrdf_load_stackoverflow) * 1967-09-29 1969-04-01
US3478298A (en) * 1967-11-13 1969-11-11 Electro Oceanics Inc Fluidproof end connector

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2195189A (en) * 1937-06-19 1940-03-26 Kilborn Sauer Company Automobile lamp socket
DE1033752B (de) * 1955-11-28 1958-07-10 Siemens Ag Verbindungsanordnung mit Stirnkontakt fuer ein oder mehrere Leitungsdraehte
NL6713298A (enrdf_load_stackoverflow) * 1967-09-29 1969-04-01
US3478298A (en) * 1967-11-13 1969-11-11 Electro Oceanics Inc Fluidproof end connector
FR1554320A (enrdf_load_stackoverflow) * 1968-01-31 1969-01-17

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4146286A (en) * 1978-04-17 1979-03-27 Ford Motor Company Electrical connection apparatus and method
DE2914658A1 (de) * 1978-04-17 1979-10-18 Ford Werke Ag Trennbare, elektrische kontaktvorrichtung, insbesondere zwischen gegeneinander bewegbaren karosseriebauteilen
FR2605149A1 (fr) * 1986-10-13 1988-04-15 Sharp Kk Connecteur en caoutchouc
US4943243A (en) * 1988-10-21 1990-07-24 Appleton Arthur I Wire connector
US5120268A (en) * 1990-08-07 1992-06-09 Al Gerrans Marine electrical connector
US5704799A (en) * 1994-04-11 1998-01-06 Tescorp Seismic Products, Inc. Field repairable electrical connector
US5542856A (en) * 1994-04-11 1996-08-06 Tescorp Seismic Products, Inc. Field repairable electrical connector
US5641307A (en) * 1994-12-01 1997-06-24 Gerrans; Al Marine electrical connector
US5885108A (en) * 1994-12-01 1999-03-23 A-G. Geophysical Products, Inc. Electrical connector
US5595497A (en) * 1995-03-01 1997-01-21 Tescorp Seismic Products, Inc. Underwater electrical connector
US5605468A (en) * 1995-11-22 1997-02-25 Tescorp Seismic Products, Inc. Electrical connector assembly having replaceable sleeve seal
US5711685A (en) * 1996-01-23 1998-01-27 Tescorp Seismic Products, Inc. Electrical connector having removable seal at cable entry end
WO1998017930A1 (en) * 1996-10-18 1998-04-30 Abb Offshore Systems Limited Piston and cylinder device with resilient seal
WO1998017892A1 (en) * 1996-10-18 1998-04-30 Abb Offshore Systems Limited Connector comprising a pair of pistons with mating surfaces
US5971783A (en) * 1998-03-16 1999-10-26 Northrop Grumman Corporation Button connector with safe front
US6575764B1 (en) 1998-05-22 2003-06-10 Reipur Technology A/S Means for providing electrical contact
WO1999062146A1 (en) * 1998-05-22 1999-12-02 Reipur Technology A/S Means for providing electrical contact
US6929493B2 (en) * 2003-05-06 2005-08-16 Intelliserv, Inc. Electrical contact for downhole drilling networks
US20040221995A1 (en) * 2003-05-06 2004-11-11 Hall David R. Loaded transducer for downhole drilling components
US20050074988A1 (en) * 2003-05-06 2005-04-07 Hall David R. Improved electrical contact for downhole drilling networks
US6913093B2 (en) 2003-05-06 2005-07-05 Intelliserv, Inc. Loaded transducer for downhole drilling components
US6830469B1 (en) * 2004-03-19 2004-12-14 Molex Incorporated Electrical connector assembly
WO2007115070A3 (en) * 2006-03-31 2008-10-02 Azura Energy Systems Inc Sealed eurytopic make-break connector utilizing a conductive elastomer contact
US20100195853A1 (en) * 2007-10-16 2010-08-05 Estron A/S Electrical Connector for a Hearing Device
US20180351278A1 (en) * 2017-06-06 2018-12-06 Amphenol Corporation Spring loaded electrical connector
US10249973B2 (en) * 2017-06-06 2019-04-02 Amphenol Corporation Spring loaded electrical connector
US10615530B2 (en) 2017-06-06 2020-04-07 Amphenol Corporation Spring loaded electrical connector
US11128080B2 (en) 2017-06-06 2021-09-21 Amphenol Corporation Spring loaded electrical connector
US11735853B2 (en) 2017-06-06 2023-08-22 Amphenol Corporation Spring loaded electrical connector

Also Published As

Publication number Publication date
ES189373U (es) 1974-03-16
NL7014744A (enrdf_load_stackoverflow) 1971-04-14
ES189373Y (es) 1974-10-16
BE756767A (fr) 1971-03-29
DE2048578A1 (de) 1971-04-22
GB1305809A (enrdf_load_stackoverflow) 1973-02-07
FR2062051A5 (enrdf_load_stackoverflow) 1971-06-25

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