Back to results
US 5,155,334 AGranted
Mirror heater
AssigneeFlexwatt Corporation
InventorsJohn A. Marstiller, Frederick G. J. Grise, deceased
Life of this patent
Estimating the term…
Abstract
A mirror heating system includes a sheet heater, sized and adapted to cover most of the back of the mirror surface, that can be mounted on the wall or other flat surface before the mirror is put into place. The system is designed so that, despite the needed electrical connections, the front and rear surfaces of the heating system remain essentially planar and parallel.
Claims8
A thin electrical heating system for mounting flush on a mounting surface and having a mirror or the like mounted flush on top of it, said system comprising:
- a backing sheet of electric insulating material having front and back surfaces that are generally planar and parallel to each other;
- a generally planar electric sheet heating element attached to the front surface of said backing sheet and having spaced apart conductive portions;
- and
- a pair of insulated connecting wires connected to respective spaced-apart conductive portions of said heating element,
- said backing sheet having channels therein extending from adjacent said portions of said heating element through a portion of said backing sheet to an edge of said backing sheet,
- said wires extending within said channels from adjacent respective ones of said heating element portions to said edge, and
- said wires, backing sheet, and heating element being selected and arranged such that the thickness of said wires is not greater than the combined thickness of said backing sheet and heating element, and the portion of said wires in said channels being between the plane of the top of said heating element and the plane of the back face of said backing sheet.
4 more elements
Dependencies are inferred from the claim text.