Thermally actuatable auxiliary electrical switch apparatus

Details Thermally actuatable auxiliary electrical switch apparatus Thermally actuatable auxiliary electrical switch apparatus

1996-10-11

1999-02-09

Picard, Leo P.

Electricity: electrothermally or thermally actuated switches

Thermally actuated switches

With bimetallic element

337333, 337372, 337380, H01H 3752, H01H 3704

Patent

active

058700145

ABSTRACT:
A thermally actuatable auxiliary switch (10, 10', 100) used with a refrigerator compressor system (60) has a generally U-shaped bimetallic element (12) mounted at one end on a base plate (16, 16', 102) and with a movable contact (28) mounted on the high expansion side (12a) of the bimetallic element in alignment with a stationary contact (32) mounted on a stationary contact support (18, 18', 116). A thermal generator (34) in the form of a PTC pill (36) wire-wound resistor (28), or other electrically energizable heater or in the form of a discharge tube (60e) of a compressor, provides heat to the bimetallic element (12) causing it to deflect after the solid state starter (50) has switched to its high resistance state to switch out the solid state starter while the compressor motor remains energized.

REFERENCES:
patent: 3146378 (1964-08-01), Grenier
patent: 3213239 (1965-10-01), Bodge
patent: 3521138 (1970-07-01), Enemark et al.
patent: 3803525 (1974-04-01), Bickmire et al.
patent: 3818404 (1974-06-01), Senor et al.
patent: 3936792 (1976-02-01), Senor et al.
patent: 4177443 (1979-12-01), Willeke
patent: 4297668 (1981-10-01), Place

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