ADAPTER BASE FOR ELECTRIC LAMP

• US 3,746,906 A
• Filed: 08/10/1971
• Issued: 07/17/1973
• Est. Priority Date: 08/10/1971
• Status: Expired due to Term

• Current Assignee: John G. Cardwell Jr
• Original Assignee: John G. Cardwell Jr
• Inventors: Cardwell, John G. Jr.
• Primary Examiner(s): Wibert, Ronald L.
• Assistant Examiner(s): Sacher, Paul A.
• Application Number:
  US05/170,589
• Time in Patent Office: 707 Days
• Field of Search: 313/318 174/50,52 339/146
• US Class Current: 313/318.04
• CPC Class Codes: H01K 1/46 supported by a separate part, e.g. base, cap

Abstract

An adapter screw-base is attached to a lamp of the type having cup-shaped ferrule terminals, by means of an adapter disc positioned over the ferrule terminals and against the lamp envelope and held in place by fastening means attached to the outer ends of the ferrule terminals. A screw-base is positioned with its skirt surrounding the adapter disc and attached thereto by interlocking indentations. Wires provide electrical connections between the screw-base and ferrule terminals.

Claims

1. A base assembly for a lamp of the type having terminal posts extending substantially mutually parallel from a Surface of the lamp, comprising an adapter member shaped and positioned to fit over said terminal posts and against said surface of the lamp, fastening means attached to said terminal posts in a position to hold said adapter member in place, and a base member attached to said adapter member and connected electrically to said terminal posts.

2. A base assembly as claimed in claim 1, in which said fastening means comprises washer-like devices respectively positioned around said terminal posts and soldered thereto, said washer-like devices bearing against a surface of said adapter member so as to hold the adapter member in position against said surface of the lamp.

3. A base assembly as claimed in claim 1, in which said fastening means comprises washer-like devices of the '"'"''"'"''"'"''"'"'speed nut'"'"''"'"''"'"''"'"' type respectively positioned around said terminal posts and held in place by means of integral inwardly extending tabs pressing against said terminal posts, said devices bearing against a surface of said adapter member so as to hold the adapter member in position against said surface of the lamp.

4. A base assembly as claimed in claim 1, in which said adapter member is disc-shaped and provided with one or more openings therethrough into which said terminal posts extend.

5. A base assembly as claimed in claim 4, in which the thickness of said adapter member is less than the lengths of said terminal posts extending from said surface of the lamp.

6. A base assembly as claimed in claim 4, in which said base member is cylindrically shaped and provided with an open-end skirt portion shaped and positioned to closely surround the periphery of said disc-shaped adapter member.

7. A base assembly as claimed in claim 6, in which said skirt portion of the base member and said periphery of the disc-shaped adapter member are provided with interlocking indentations for fastening said base member to said adapter member.

8. A base assembly as claimed in claim 1, in which said terminal posts comprise cup-shaped ferrules sealed at the open ends thereof into said surface of the lamp, each of said ferrules being provided with an outwardly extending nipple at the closed outer end thereof, said fastening means respectively surrounding and being attached to said nipples of the terminal posts.

9. A base assembly as claimed in claim 1, in which said adapter member is disc-shaped and provided with one or more openings therethrough into which said terminal posts extend, the thickness of said adapter member being less than the lengths of said terminal posts extending from said surface of the lamp, said base member being cylindrically shaped and provided with an open-end skirt portion shaped and positioned to closely surround the periphery of said disc-shaped adapter member, said skirt portion of the base member and said periphery of the disc-shaped adapter member being provided with interlocking indentations for fastening said base member to said adapter member.

10. A base assembly as claimed in claim 8, in which said base member is a screw-base provided with a cylindrical threaded portion.