Electric heating – Heating devices – With heater-unit housing – casing – or support means
Patent
1977-01-27
1978-08-15
Mayewsky, Volodymyr Y.
Electric heating
Heating devices
With heater-unit housing, casing, or support means
174 51, 219331, 219544, 362397, H05B 306
Patent
active
041075145
ABSTRACT:
Instead of the usual glass case the heating element and thermostat of a submersible thermostatically controlled heater are disposed in separate cases made of metal and plastics respectively which are secured together in liquid-tight manner with the heating element connected through the thermostat to an external source of operating current and the metal case for the heating element connected to earth.
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patent: 2930634 (1960-03-01), Merritt
patent: 3062940 (1962-11-01), Bauer et al.
patent: 3329803 (1967-07-01), Sink
patent: 3371192 (1968-02-01), Rosenel
patent: 3441711 (1969-04-01), Hirschowitz
patent: 3617611 (1971-11-01), Kuether
patent: 3895217 (1975-07-01), Hall et al.
patent: 3922528 (1975-11-01), Nickmeyer et al.
C. Ellson & Co. Ltd.
Mayewsky Volodymyr Y.
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