Electric heating – Heating devices – With power supply and voltage or current regulation or...
Patent
1980-10-20
1982-05-18
Reynolds, B. A.
Electric heating
Heating devices
With power supply and voltage or current regulation or...
219493, 219501, 219491, 219442, 99281, 99283, H05B 102
Patent
active
043307027
ABSTRACT:
A coffeemaker is provided with a power circuit and a control circuit. The power circuit is connected to a household source of electric power and it is activated by a relay switch. The control circuit includes a relay coil for the switch, and a triac that may be triggered into conduction when a turn on signal from an electronic timer module is applied to the control terminal of the triac simultaneously with the application of direct current control circuit voltage across the triac. Thereafter, the triac remains in its conductive state so long as the direct current flowing through the triac remains above a minimum level. Subsequent removal of the turn on signal from the control terminal of the triac has no effect on the operation of the power circuit which includes the coffeemaker heating means so long as the direct current flowing through the triac remains above a minimum level.
REFERENCES:
patent: 3888075 (1975-06-01), Wecker
patent: 3969610 (1976-07-01), Ratti et al.
patent: 4069750 (1978-01-01), Kemp
patent: 4155291 (1979-05-01), Ryckman, Jr. et al.
"SCR Manual" G.E., pp. 110-111, 74.
Nationa Semiconductor, C 1978 FEPM-0091, MA1040/1042/1043 Series.
Cullen John F.
General Electric Company
Paschall M. H.
Platt Leonard J.
Powers George R.
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