Electrode boiler with automatic control

Details Electrode boiler with automatic control Electrode boiler with automatic control

1974-02-15

1976-03-16

Bartis, A.

Electric heating

Heating devices

Combined with diverse-type art device

219273, 219295, 219501, 338 86, H05B 102, H05B 360

Patent

active

039447855

ABSTRACT:
An electrode boiler includes a plurality of veritcal electrodes arranged in a container having an open steam outlet at its top whereby the boiler operates at substantially atmospheric pressure. The boiler is provided with electrically controlled feed and drain valves and a water level sensing electrode is provided in the container. Electronic solid state control circuitry includes means response to the water level sensed by water level sensing electrode for controlling operation of the feed valve to replace water boiled away thereby maintaining a constant water level in the boiler. The electronic control circuitry also includes current responsive means operative to open the drain valve when the electrode current reaches a predetermined maximum magnitude irrespective of the water level and to close the drain valve when the electrode current falls to a predetermined lower value. The control circuitry includes means to prevent the feed and drain valves from being open simultaneously and electronic hysteresis means to prevent the feed valve from being opened and closed in rapid succession.

REFERENCES:
patent: 1462350 (1923-07-01), Merrill et al.
patent: 1650632 (1927-11-01), Kowallik
patent: 1665793 (1928-04-01), Sandborgh
patent: 2453211 (1948-11-01), Eaton
patent: 3083288 (1963-03-01), Vischer
patent: 3114028 (1963-12-01), Vischer
patent: 3219796 (1965-11-01), Graf et al.
patent: 3761679 (1973-09-01), Dall
patent: 3780261 (1973-12-01), Eaton-Williams

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