Oven

Details Oven Oven

1977-05-20

1980-06-17

Reynolds, B. A.

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

165169, 236 15A, 219364, 219367, 219369, H05B 906, H05B 102

Patent

active

042085721

ABSTRACT:
An oven having an electrical resistance heater and a heat exchanger to maintain a constant temperature in an oven chamber cavity. The heat exchanger is internal to the body of the oven and adjacent to the oven chamber cavity. Air is the exchange medium in the heat exchanger to achieve a balanced, cooling effect through direct air exhaust and also to achieve zero environment effect. An inert gas may be introduced into the oven chamber cavity during the heating process to reduce oxidation. Outside air may also be introduced into the oven during the heating process. Electrical circuitry provides for controlling the temperature range of the oven, for generating a signal for servo motor control of a damper in the heat exchanger, and a high limit temperature controller to disable the electrical resistance heater when an over temperature condition is reached.

REFERENCES:
patent: 2606372 (1952-08-01), Foulder et al.
patent: 3198503 (1965-08-01), Eichelberg et al.
patent: 3364912 (1968-01-01), Dills et al.
patent: 3367316 (1968-02-01), Eff
patent: 3445939 (1969-05-01), Malmquist
patent: 3626154 (1971-12-01), Reed
patent: 3686476 (1972-08-01), Schaver, Jr.
patent: 3783219 (1974-01-01), Tateda
patent: 3885126 (1975-05-01), Sugiyama et al.
patent: 3917444 (1975-11-01), Carthew
patent: 4029463 (1977-06-01), Johansson et al.

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