Incandescent lamp

• US 3,885,185 A
• Filed: 03/29/1974
• Issued: 05/20/1975
• Est. Priority Date: 03/29/1974
• Status: Expired due to Term

• Current Assignee: Ralph E. Tilley
• Original Assignee: Ralph E. Tilley
• Inventors: Tilley, Ralph E.
• Primary Examiner(s): Chatmon, Jr., Saxfield
• Application Number:
  US05/456,097
• Time in Patent Office: 417 Days
• Field of Search: 313/315,318 339/242,258R,258P,91L
• US Class Current: 313/318.03
• CPC Class Codes: H01K 1/42 Means forming part of the lamp for the purpose of providing electrical connection, or support for, the lamp

Abstract

An incandescent lamp having a bulb and a male base at the trailing end thereof for placement in a conventional threaded electrical socket, the male base comprising a ring conductor secured to the necked down portion of the bulb and from which a plurality of electrically conductive resilient fingers rearwardly extend, the unrestrained composite diameter of the resilient fingers being less than the inside diameter of the conventional electrical socket. A second axial conductor projects rearwardly from the base of the lamp, being insulated from the ring connector by suitable dielectric whereby the male end of the lamp may be linearly inserted into the socket causing constriction of the fingers creating a firm electrical connection with the threaded peripheral conductor of the socket, the axial conductor of the lamp coming to rest against the exposed spring of the axial conductor of the socket whereby electrical energy is communicated to the filament of the lamp.

Claims

1. An incandescent lamp for rectilinear insertion into press-fit conducting relation with a conventional threaded electrical socket comprising:

a bulb having an axis, the bulb containing a filament and having a necked down trailing end;

first conductor means connected to one end of the filament and mounted to the necked down trailing end of the bulb, said first conductor means comprising a plurality of axially extending, rearwardly directed, and outwardly radially biased resilient conductive fingers with memory, each finger being initially resiliently biased a predetermined radial distance from the axis of the bulb to form an initial composite diameter greater than the diameter of said threaded socket;

second conductor means carried in exposed relation at the trailing end of the bulb and connected to the other end of the filament; and

electrical insulating means disposed between the first and second conductor means;

whereby the resilient fingers are inwardly deflected reducing said composite diameter to one equal to the socket diameter upon rectilinear insertion of the trailing end of the lamp into the socket, the memory of the resilient fingers insuring electrical conduction with a conductor at the socket threads.

2. The incandescent lamp of claim 1 wherein the fingers are each joined to a conductive ring carried at the trailing end of the bulb and comprising said first conductor means.

3. The incandescent lamp of claim 1 wherein each finger is inwardly curved so that the free end thereof is situated well within said composite diameter.

4. The incandescent lamp of claim 1 wherein said electrically insulating means is stepped.