Three-stage temperature switch, preferably for a hot water heate

Details Three-stage temperature switch, preferably for a hot water heate Three-stage temperature switch, preferably for a hot water heate

1982-10-26

1984-12-11

Broome, Harold

Electricity: electrothermally or thermally actuated switches

Thermally actuated switches

With bimetallic element

337334, 337348, H01H 3752

Patent

active

044881380

ABSTRACT:
A three-stage temperature switch, preferably for hot water heaters, having regulator contacts in the 1- and 2-branches of the switch, wherein the operating thermostat and the safety thermostat are connected to the casing of the three-stage switch for, respectively, maintaining an operating temperature by connecting and disconnecting an electric circuit via an operating contact in the L-branch of the switch, and monitoring a higher, critical temperature for disconnecting the electric circuit via switching contacts in the 1-, 2- and L-branches of the switch if the critical temperature (e.g., 95.degree. C.) is exceeded. The switching contacts are constituted by the regulator contacts and by a switching contact on the L-branch, which three contacts may be simultaneously actuated by an adjacent body which has mechanical contact with and is moved by the safety thermostat. If the critical temperature is exceeded, the safety thermostat will snap from its operative position into its inverted position, thereby opening the contacts and disconnecting the heating element of the hot water heater. The three-stage switch is provided with a reset button for restoring the safety thermostat to its noninverted, operative position, thereby closing the contacts.

REFERENCES:
patent: 3242293 (1966-03-01), Manecke
patent: 3435189 (1969-03-01), Manecke
patent: 3470516 (1969-09-01), Basse
patent: 3493911 (1970-02-01), Broetto
patent: 3885222 (1975-05-01), Manecke

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