US3890027A - Electrical socket - Google Patents

Electrical socket Download PDF

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Publication number
US3890027A
US3890027A US411672A US41167273A US3890027A US 3890027 A US3890027 A US 3890027A US 411672 A US411672 A US 411672A US 41167273 A US41167273 A US 41167273A US 3890027 A US3890027 A US 3890027A
Authority
US
United States
Prior art keywords
socket
base portion
housing
housing base
slots
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
US411672A
Other languages
English (en)
Inventor
Wallace H Orr
James L Grindle
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Priority to US411672A priority Critical patent/US3890027A/en
Priority to JP8991174A priority patent/JPS5719551B2/ja
Priority to ES431149A priority patent/ES431149A1/es
Application granted granted Critical
Publication of US3890027A publication Critical patent/US3890027A/en
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
    • H01R33/00—Coupling devices specially adapted for supporting apparatus and having one part acting as a holder providing support and electrical connection via a counterpart which is structurally associated with the apparatus, e.g. lamp holders; Separate parts thereof
    • H01R33/05—Two-pole devices
    • H01R33/22—Two-pole devices for screw type base, e.g. for lamp

Definitions

  • Greenberg 5 7 ABSTRACT Electrical socket device includes a socket housing containing a center contact assembly having a resiliently mounted freely movable center contact to enable a lamp mounted in the socket to be correctly positioned in axial alignment in the socket while providing good electrical contact.
  • Spaced ledges are provided in the socket housing on opposite sides of the center contact assembly for engaging the lamp base to maintain proper alignment of the lamp.
  • the present invention relates to electrical sockets, and more particularly concerns electrical sockets for removably mounting lamps.
  • Still another object of the invention is to provide an electrical socket of the above type wherein a lamp mounted in the socket is properly positioned and aligned while having good electrical contact with the conductive socket parts.
  • an electrical socket comprising, in combination, a socket housing having an open end and a transverse base portion near its other end and having a central axis, the housing base portion having a pair of spaced slots extending therethrough on opposite sides of the central axis, resilient means arranged on the housing base portion between the slots, and U-shaped conductive contact means having a pair of legs respectively extending loosely through the slots and having a web portion engaging the resilient means, and securing means movably holding the contact means on the housing base portion with the web portion pressed in resilient engagement against the resilient means.
  • FIG. 1 is an exploded perspective view of an embodiment of the socket device of the invention, with parts broken away;
  • FIG. 2 is a cross-sectional view in elevation of the socket device showing the base portion of a lamp in assembly therewith;
  • FIG. 3 is a top plan view of the socket housing of the FIG. 1 device.
  • FIG. 1 there is shown an embodiment of the invention which comprises a cylindrical socket housing 1 of electrical insulating material such as porcelain which is open at its top end and is formed with a transverse base portion 2 near its bottom end.
  • base portion 2 In its central region, base portion 2 is formed with a recessed, somewhat circular seat 3 for receiving coil spring 6.
  • base portion 2 On opposite sides of recess 3, base portion 2 has a pair of slots 4, 4' (see FIG. 2) for respectively receiving legs 5a, 5b of a U- shaped conductive contact member 5 which has a web portion 5c which overlies the top of coil spring 6 in the assembled condition of the parts.
  • Legs 5a, 5b of contact member 5 are provided with punched-out projections or barbs 5d, so that when contact member 5 is inserted into slots 4, 4 straddling coil spring 6, barbs 5d engage the underside of base portion 2 for holding contact member 5 in assembly in socket housing 1 with web portion 5c pressing resiliently against and compressing coil spring 6, as seen in FIG. 2.
  • Legs 5a, 5b of contact member 5 have elongated terminal portions or tabs 5e, 5f, respectively, at their ends which project below the bottom of slots 4, 4' for receiving push-on terminal connectors of known type (not shown).
  • conductive screw shell 7 which, in the illustrated embodiment, comprises two curved shell parts 7a, 7!; having tongue and slot portions at their respective adjoining edges for securing the two parts together. It will be understood, however, that screw shell 7 may be of conventional unitary form if desired. Projecting downwardly from opposite sides of the cylindrical threaded portion of screw shell 7 are terminal strips 7a, 7b formed with transverse projections 70, 7d, the arrangement being such that when terminal strips 7a, 7b are inserted through corresponding slots 8, 8a in base portion 2, the ends of the terminalstrips may be twisted slightly so that projections 70, 7d engage the underside of base portion 2 to hold conductive shell 7 in assembly in socket housing 1.
  • base portion 2 is formed with integral partitions 2a, 2b serving as insulating barriers between shell terminals 7a, 7b and central contact terminals 5e, 5f.
  • Base portion 2 is also formed (see FIGS. 1 and 3) with a pair of apertures 10, 10a for receiving screws to secure socket housing 1 with its assembled parts to a fixture or other support (not shown).
  • base portion 2 On its upper surface, base portion 2 is formed with parallel ledges 11, 12 located inwardly of slots 8, 8a and having substantially co-planar top surfaces.
  • ledges 11, 12 located inwardly of slots 8, 8a and having substantially co-planar top surfaces.
  • FIG. 2 showing a lamp 13 of conventional type mounted in socket housing 1 with its threaded base 14 screwed into screw shell 7, ledges ll, 12 are so spaced as to engage the bottom shoulder of lamp base 14 outwardly of contact 15 at the bottom of lamp 13.
  • the ledges thereby serve as stop means for automatically aligning lamp 13 in the proper position along the central axis of socket housing 1 and thus provide consistent location of the light center relative to the optical parts of the lighting fixture such as the reflector.
  • central contact member 5, being resiliently mounted in engagement with coil spring 6, serves in effect as a floating" contact which is readily movable in all directions. Accordingly, when the base of lamp 13 is screwed into contact with the top of contact member 5, the latter member automatically accommodates to the movement of lamp 13 and does not tend to tilt or cock the lamp at an angle to the socket axis as may occur with socket devices of known type, which can result in hindrance to the turning of the threaded lamp base in the screw shell, as well as misalignment of the lamp in its operating position.
  • the floating center contact member 5 permits lamp 13 to be readily screwed into the socket until its base comes into contact with positioning ledges 11, 12 so that alignment with the mating contact surface on the lamp base to provide good electrical contact is automatically achieved. Since in the described structure only a single part contains the surface which contacts the lamp base and also the terminal tabs which connect directly to the lead terminals with no intermediate parts or hardware, a low resistance connection is thereby provided. This permits the use of a higher electrical resistance, lower cost contact material such as stainless steel, which has greater strength and higher temperature capability than materials conventionally used for this purpose.
  • the top surface of central contact member has an indentation 5g for receiving a complementary projection at the bottom of lamp contact 15, such as is usually present in conventional lamps.
  • Indentation 5g serves not only to provide improved electrical contact between the mating parts but also, by extending into the end of coil spring 6, aids in centering the latter in the assembly.
  • legs 5a, 5b of contact member 5 are preferably somewhat spread apart so that their bottom ends are further apart than slots 4, 4, thus maintaining projections 5d in position outwardly of slots 4, 4 to ensure their holding contact member in proper assembly on housing base portion 2.
  • An electrical socket comprising, in combination, a socket housing having an open end and a transverse base portion near its other end and having a central axis, said housing base portion having a pair of spaced slots extending therethrough on opposite sides of said central axis, resilient means arranged on said housing base portion between said slots, and U-shaped conductive contact means having a pair oflegs respectively extending loosely through said slots and having a web portion engaging said resilient means, said legs having electrical terminal means for making an electrical connection to said contact means, and securing means movably holding said contact means on said housing base portion with said web portion pressed in yieldable engagement against said resilient means, said contact means being freely movable in all directions to accommodate the position of an electrical device adapted to be received in said socket housing in engagement with said contact means.
  • said securing means comprising projections on said pair of legs engaging the underside of said housing base portion.
  • said resilient means comprising a coil spring compressed between said U- shaped conductive contact means and said housing base portion.
  • said stop means comprising spaced ledges formed in the upper surface of said housing base portion, said ledges having substantially co-planar upper surfaces.

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  • Connecting Device With Holders (AREA)
US411672A 1973-11-01 1973-11-01 Electrical socket Expired - Lifetime US3890027A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US411672A US3890027A (en) 1973-11-01 1973-11-01 Electrical socket
JP8991174A JPS5719551B2 (enrdf_load_stackoverflow) 1973-11-01 1974-08-07
ES431149A ES431149A1 (es) 1973-11-01 1974-10-18 Mejoras en la construccion de un portalamparas electrico.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US411672A US3890027A (en) 1973-11-01 1973-11-01 Electrical socket

Publications (1)

Publication Number Publication Date
US3890027A true US3890027A (en) 1975-06-17

Family

ID=23629861

Family Applications (1)

Application Number Title Priority Date Filing Date
US411672A Expired - Lifetime US3890027A (en) 1973-11-01 1973-11-01 Electrical socket

Country Status (3)

Country Link
US (1) US3890027A (enrdf_load_stackoverflow)
JP (1) JPS5719551B2 (enrdf_load_stackoverflow)
ES (1) ES431149A1 (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3976349A (en) * 1975-02-21 1976-08-24 General Electric Company Electrical socket
US4228583A (en) * 1979-04-27 1980-10-21 General Electric Company Screw socket assembly device
US4690648A (en) * 1985-04-05 1987-09-01 Cooper Industries, Inc. Cartridge fuse holder
US5267879A (en) * 1992-11-03 1993-12-07 Gould Inc. Panel mount fuse assembly
US7234973B1 (en) 2006-03-23 2007-06-26 Shelly Mark E Lighting system having modified light bulb base and luminare socket for preventing the selection of an over wattage light bulb and method of forming same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5882711U (ja) * 1981-11-30 1983-06-04 カツラ電工株式会社 照明器具用部品ブロツク体
JPS6279379U (enrdf_load_stackoverflow) * 1985-11-07 1987-05-21

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1774517A (en) * 1927-10-11 1930-09-02 Pass & Seymour Inc Lamp receptacle
US2651763A (en) * 1947-12-03 1953-09-08 Henry Hyman Shock absorber assembly for portable electric flashlights
US2721985A (en) * 1950-03-30 1955-10-25 Gilbert Margaret Doris Lamp socket apparatus
US2890435A (en) * 1954-08-12 1959-06-09 United Carr Fastener Corp Electric lamp sockets
US2921146A (en) * 1957-12-02 1960-01-12 Gen Electric Plug-in type power take-off device with bimetallic contacts
US3170750A (en) * 1962-06-21 1965-02-23 Arthur I Appleton Lamp receptacle
US3187296A (en) * 1961-08-31 1965-06-01 Gen Electric Plug-in terminal and terminal block for meter socket
US3241136A (en) * 1963-10-07 1966-03-15 Marco Oak Ind Modular type indicator unit
US3360768A (en) * 1966-11-02 1967-12-26 Pass & Seymour Inc Screw socket

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1774517A (en) * 1927-10-11 1930-09-02 Pass & Seymour Inc Lamp receptacle
US2651763A (en) * 1947-12-03 1953-09-08 Henry Hyman Shock absorber assembly for portable electric flashlights
US2721985A (en) * 1950-03-30 1955-10-25 Gilbert Margaret Doris Lamp socket apparatus
US2890435A (en) * 1954-08-12 1959-06-09 United Carr Fastener Corp Electric lamp sockets
US2921146A (en) * 1957-12-02 1960-01-12 Gen Electric Plug-in type power take-off device with bimetallic contacts
US3187296A (en) * 1961-08-31 1965-06-01 Gen Electric Plug-in terminal and terminal block for meter socket
US3170750A (en) * 1962-06-21 1965-02-23 Arthur I Appleton Lamp receptacle
US3241136A (en) * 1963-10-07 1966-03-15 Marco Oak Ind Modular type indicator unit
US3360768A (en) * 1966-11-02 1967-12-26 Pass & Seymour Inc Screw socket

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3976349A (en) * 1975-02-21 1976-08-24 General Electric Company Electrical socket
US4228583A (en) * 1979-04-27 1980-10-21 General Electric Company Screw socket assembly device
US4690648A (en) * 1985-04-05 1987-09-01 Cooper Industries, Inc. Cartridge fuse holder
US5267879A (en) * 1992-11-03 1993-12-07 Gould Inc. Panel mount fuse assembly
US7234973B1 (en) 2006-03-23 2007-06-26 Shelly Mark E Lighting system having modified light bulb base and luminare socket for preventing the selection of an over wattage light bulb and method of forming same

Also Published As

Publication number Publication date
JPS5719551B2 (enrdf_load_stackoverflow) 1982-04-23
JPS5078178A (enrdf_load_stackoverflow) 1975-06-25
ES431149A1 (es) 1976-11-01

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