Light bulb with program disc

• US 5,345,143 A
• Filed: 08/31/1992
• Issued: 09/06/1994
• Est. Priority Date: 08/31/1992
• Status: Expired due to Fees

• Current Assignee: Charles T. Little
• Original Assignee: Charles T. Little
• Inventors: Little, Charles T.
• Primary Examiner(s): Pascal, Robert J.
• Assistant Examiner(s): Philogene, Haissa
• Application Number:
  US07/937,139
• Time in Patent Office: 736 Days
• Field of Search: 315/64, 315/65, 315/67, 315/68, 315/66, 315/70, 313/493, 313/634
• US Class Current: 315/64
• CPC Class Codes: H01K 9/00 Lamps having two or more incandescent bodies separately heated H01K11/00, H01K13/00 take precedence

Abstract

A light bulb having a program disc interposed between a base and bulb components, the program disc having sockets on either side adapted to receive base and bulb pins. The program disc can be installed in various rotated positions to electrically connect one or more filaments in various ways to provide differing functions, such as successive filament energization, energizing combinations of filament or to supply varying power levels to a single filament.

Claims

1. A light bulb comprising:

a base having a socket section configured to be received in a socket be connected to a source of electrical power, said socket section having portions establishing electrical contact with said socket;

a pair of power output contact elements on said base, said pair of power output contact elements electrically connected to respective portions of said socket section;

a bulb defining a sealed cavity and having at least one filament mounted therein, a pair of wire leads connected to said filament and extending through an endwall of said bulb;

power input contact elements extending through said bulb endwall, said power input contact elements connected to a respective one of said wire leads;

a program disc constructed of electrically insulating material interposed between said base and said bulb, said program disc having two opposite sides, each side adjacent a respective one of said base and said bulb end wall, and each side of said program disc having a separate set of contacts, each set of contacts matrable with each power output and input contact elements of said base and bulb respectively by a pin and socket connection; and

interconnection means carried by said program disc electrically interconnecting each contact on said one side of said program disc with a respective contact on said other side of said program disc, said interconnection means creating a different electrical connection between said base contact elements and said bulb contact elements in different rotated positions of said program disc.

2. The light bulb of claim 1 wherein said program disc set of contacts on each side of said program disc comprise a series of circumferentially spaced contacts which are adapted to mate with said base and bulb contact elements in each of a plurality of successive rotated positions of said program disc on said base and bulb endwall.

3. The light bulb of claim 1 wherein said program disc contacts are disposed in a series of sockets and said base and bulb contact elements are comprised of axially extending pins.

4. The light bulb according to claim 3 wherein said bulb is provided with a plurality of filaments, each having a pair of electrical leads extending through said bulb end wall, and a circumferentially spaced series of pairs of power input contact elements on said bulb end, each bulb contact element pair electrically connected with a respective filament electrical lead, said program disc including a series of pairs of contact elements disposed in corresponding sets of pairs of sockets on said one side of said program disc corresponding to each of said bulb contact element pair sets located to enable mating together in said successive rotated installed positions of said program disc.

5. The light bulb according to claim 3 wherein at least some of said program disc sockets carry a plurality of separate contacts comprising axially spaced rings disposed therein, and wherein said interconnection means establishes an electrical connection between said rings and said base contact elements whereby a plurality of filaments may be connected to said base power output elements in at least one installed position of said program disc.

6. The light bulb according to claim 4 wherein several socket sets of said program disc sockets have a plurality of contact rings therein and wherein said interconnection means establishes an electrical connection of said all of said contact rings in a particular socket with a respective bulb contact element so that filaments are connected to said base power output elements in successive rotative positions of said program disc on said bulb end wall.

7. The light bulb according to claim 1 wherein said program disc contains a plurality of transformers and wherein said interconnection means connects a single transformer between said base contact elements and said bulb contact elements in each successive rotated installed position of said program disc on said base and bulb end.

8. The light bulb according to claim 3 wherein said sockets of said program disc formed on either side of said program disc are circumferentially offset from each other.