Jerry Daniel Pajer

US Patent:

46509712, Mar 17, 1987

Filed:

Oct 24, 1983

Appl. No.:

6/544600

Inventors:

John V. Manecci - Lorain OH
Jerry D. Pajer - Lorain OH

Assignee:

PGM, Inc. - Lyndhurst OH

International Classification:

H05B 102

US Classification:

219506

Abstract:

An optical indicator apparatus includes an optical output device for producing a light output in response to an electrical input thereto, a hollow housing for supporting the optical output device relative to another device to permit viewing of light output by the optical output device, electrical input leads extending through at least a portion of the housing for receiving such electrical input and coupling the same to cause the optical output device to produce an output indicating receipt of such electrical input, and seal material for sealing in substantially fluid-tight relation in the hollow housing at least part of the optical output device and at least part of the electrical input leads while holding the same in relatively fixed position in the hollow housing. A method of identifying the energized condition of an electrical device, such as heat trace cable or the like, includes mounting a plurality of indicators with respect to such heat trace cable or the like at a plurality of locations along the length thereof and electrically connecting such indicators thereto for energization in response to power received at such connection thereof, whereby failure of energization of such an indicator represents a failure in the energization of such heat trace cable or the like.