Solid state potential indicator for watthour meters

Claim 1

In a watthour meter having an enclosure with a transparent meter reading window portion, a frame, an electro-responsive meter movement, carried on said frame, plural electro-magnetic potential coils, a register having an indicator means, and a faceplate assembly having first and second separate sections viewable through said window portion when said first section is mounted on said register and behind said indicator means and when said second section is mounted to a forward end part of said frame, a potential indicator for providing visual indications of the energization of each of said potential coils, said potential indicator comprising: an insulated mounting plate secured to said forward end part of said frame so as to expose a portion thereof immediately adjacent said faceplate assembly, the exposed portion having plural recessed areas; a plurality of solid state light emitters corresponding in number to the number of said plural potential coils and disposed in said recessed areas of said exposed portion of the mounting plate so as to be in a recessed relationship thereto for direct viewing through said window portion; printed circuit means disposed at the rear of said exposEd portion of said mounting plate and having printed conductive portions thereof connected between the solid state emitters and terminal contacts formed integrally in said printed conductive portions; and conductor means detachably connected to said terminal contacts of the printed conductive portions connecting each of said solid state light emitters across an illuminating voltage developed by a separate one of said potential coils so that each light emitter is lit in response to a normal energized condition of an associated potential coil.