Lamp cap for use with indicating light assembly

• US 4,070,568 A
• Filed: 12/09/1976
• Issued: 01/24/1978
• Est. Priority Date: 12/09/1976
• Status: Expired due to Term

• Current Assignee: AG Communication Systems Corp. (Nokia Corporation)
• Original Assignee: GTE Automatic Electric Laboratories Incorporated
• Inventors: Gala, Babulal Virji
• Primary Examiner(s): Hix, L. T.
• Assistant Examiner(s): Gellner, M. L.
• Application Number:
  US05/749,208
• Time in Patent Office: 411 Days
• Field of Search: 240/25, 240/106.1, 240/151, 240/8, 240/16, 200/314, 340/383
• US Class Current: 362/311.09
• CPC Class Codes: F21S 8/00 Lighting devices intended for fixed installation F21S9/00, F21S10/00 take precedence; using a string or strip of light sources F21S4/00
• CPC Class Codes: F21W 2111/00 Use or application of lighting devices or systems for signalling, marking or indicating, not provided for in codes F21W2102/00 – F21W2107/00
• CPC Class Codes: F21Y 2115/10 Light-emitting diodes [LED]
• CPC Class Codes: Y10S 362/80 Light emitting diode

Abstract

A lamp cap for use with an indicating light assembly or illuminated push button wherein the light source is a light emitting diode or other low output light producing device. A light concentrating lens is included which conducts light from the light source to the top of the lamp cap wherein a concentrated light pattern appears to indicate operation of the associated light producing device.

Claims

1. A lamp cap for use with indicating light assembly comprising:

A substantially flat upper portion;

supported by wall means extending in a downward direction from said upper portion to form an open bottomed structure having a hollow interior;

said upper portion including an off-center positioned frusto-conical shaped lens;

said lens extending downward from said upper portion and positioned within said wall means;

said wall means further adapted to releasably engage said indicating light assembly.

2. A lamp cap as claimed in claim 1 wherein said upper portion is constructed of light transparent material.

3. A lamp cap as claimed in claim 1 there is further provided cover means of light transparent material covering all of said upper portion and substantially all of said wall means.

4. A lamp cap as claimed in claim 3 wherein said wall means further include receiving means;

and said cover means include projecting means adapted to engage said receiving means.

5. A lamp cap as claimed in claim 3 wherein identification means are provided between said lens cap upper portion and said cover means.

6. A lamp cap as claimed in claim 1 wherein said lens includes an exterior surface treated to increase the light reflection characteristics of said lens.

7. A lamp cap as claimed in claim 1 wherein said indicating light assembly includes a light source providing illumination at a predetermined wave length;

and said upper portion and said lens are constructed of light transparent material of a color having the same wave length as said light source.

8. A lamp cap as claimed in claim 7 wherein said light source is a light emitting diode positioned directly below the center of said upper portion.