Electric heating – Microwave heating – Tunnel furnace
Patent
1974-03-13
1976-06-22
Miller, J D
Electric heating
Microwave heating
Tunnel furnace
317 13B, 219499, 219510, H02H 708
Patent
active
039653960
ABSTRACT:
A contactor or switch to an electrically powered unit, such as a motor, is controlled by a condition responsive circuit which may include facilities for changing the response condition of the circuit and/or facilities responsive to several conditions, such as temperature and excessive current.
REFERENCES:
patent: 3321641 (1967-05-01), Howell
patent: 3328639 (1967-06-01), Gryctko
patent: 3329869 (1967-07-01), Obenhaus
patent: 3457460 (1969-07-01), Buiting et al.
patent: 3500074 (1970-03-01), Obenhaus
patent: 3564205 (1971-02-01), Tyler
patent: 3648074 (1972-03-01), Nurnberg
patent: 3660718 (1972-05-01), Pinckaers
patent: 3739198 (1973-06-01), Clements
W. R. Spofford Jr., "The D13T-A Programmable U. J. T.", 11/67, Application Note.
Newell Dennis E.
Tyler Hugh J.
Miller J D
O'Brien Anthony A.
Robertshaw Controls Company
Salce Patrick R.
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