Temperature switch

Details Temperature switch Temperature switch

1990-12-12

1991-10-08

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Thermally actuated switches

With longitudinally expansible solid element

219449, 337382, H01H 3748, H05B 372

Patent

active

050558196

ABSTRACT:
A temperature switch, used more particular as a temperature limiter for a radiation heating element (11) for heating a glass-ceramic plate (12), has radiation heaters (13, 14). Its rod-shaped temperature sensor (20) has an expansion rod (24) which is disposed in a tube (25) acting as a comparison norm and can be made of a chromium-iron-aluminum alloy and is heat-treated above 1100.degree. C. The tube (25) can be made of a radiation-absorbing material or is coated with such a material, for example, cordierite, non-transmissive glass-ceramics or quartz material. The result of both steps is that the temperature switch has an enhanced switching amplitude and therefore a reduced switching frequency.

REFERENCES:
patent: 4631390 (1986-12-01), Crossley et al.
patent: 4665307 (1987-05-01), McWilliams
patent: 4700051 (1987-10-01), Goessler et al.

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