BULB-MOUNTING ASSEMBLY

• US 3,573,705 A
• Filed: 03/21/1969
• Issued: 04/06/1971
• Est. Priority Date: 03/21/1969
• Status: Expired due to Term

• Current Assignee: Magi Hugo
• Original Assignee: Magi Hugo
• Inventors: MAGI HUGO
• Application Number:
  US04/809,099
• Time in Patent Office: 746 Days
• US Class Current: 439/101
• CPC Class Codes: F21S 43/195 Details of lamp holders, terminals or connectors

Abstract

A socket assembly for a bulb, consisting of two nonconductive parts fastened together, and several conductive members. One of the parts provides a base, while the other is upstanding from the base and defines a semicylindrical recess opening away from the base. A single-piece conductive ground strap stamped from sheet metal is provided to form a semicylinder to define with the recess a socket aperture. The ground strap also has a shield portion which shields from the bulb a space through which a wire can pass to be connected with a terminal at a location between the nonconductive parts.

Claims

1. A socket assembly for a bulb, the assembly comprising:

a first nonconductive member having a supporting surface;

a second nonconductive member adapted to be secured against said supporting surface and having a substantially semicylindrical depression opening away from said supporting surface, thereby to define one-half of a cylindrical socket aperture;

a conductive ground-strap having a first portion, a step-portion and a second portion;

the step-portion being integral with said first and second portions respectively at first and second substantially parallel bend-lines, said step-portion having a semicircular aperture of which the diametral edge coincides with said first bend-line and of which the curved edge substantially corresponds to the curvature of said semicylindrical depression;

said first portion being substantially at right angles to said step-portion, the first portion having adjacent the semicircular aperture an upwardly arched central part which defines the other half of said cylindrical socket aperture when said first portion is secured against the second nonconductive member with the said curved edge of the semicircular aperture in registry with the semicylindrical depression of the second nonconductive member;

said second portion extending away from the second nonconductive member in spaced relation with the first nonconductive member, thereby to provide a shielded space between itself and the first noncOnductive member, the conductive ground-strap being adapted to be grounded the said first nonconductive member to a suitable ground;

at least one conductive terminal having a portion adapted to be locked between the first and the second nonconductive member when they are secured tightly together, the conductive terminal further having a portion adapted to be electrically connected with a contact for the bulb filament, said shielded space being adapted to receive a wire connected to the conductive terminal at a location between the first and second nonconductive members; and

means for securing the conductive ground-strap against the nonconductive members.

2. A socket assembly as claimed in claim 1, in which the first nonconductive member is provided with aperture means through which a wire can exit from the said shielded space.

3. A socket assembly as claimed in claim 1, in which the end of the socket aperture remote from the step-portion of the conductive ground-strap is provided with bayonet locking means for a bayonet-type bulb, and in which the conductive terminal is sufficiently resilient that the portion of the conductive terminal adapted to be electrically connected with the bulb filament contact is capable of urging the inserted bulb in the direction opposite to the insertion direction, thereby locking the inserted bulb into the bayonet locking means.

4. A socket assembly as claimed in claim 1, in which there are two conductive terminals, each having a portion adapted to be electrically connected with one of the bulb filament contacts on a two-filament bulb.

5. A socket assembly as claimed in claim 1, in which said upwardly arched central part is sandwiched between two end parts of the first portion, each end part having an aperture, said second nonconductive member having two upstanding pillars adapted to register through the apertures, the pillars being capable of deformation to prevent their withdrawal from the aperture.

6. A socket assembly as claimed in claim 5, in which the pillars are made of a heat-deformable substance.