Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1976-03-17
1977-07-12
Miller, Jr., Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307246, 307251, 307255, 307304, 361197, H03K 1756, H03K 513
Patent
active
040356680
ABSTRACT:
The invention discloses an electronic input-interruption timer for use with an electrical appliance such as a washing machine, a fan, a refrigerator and so on. The timer comprises an integrator consisting of an input resistor and a capacitor, a switching element, a MOS field-effect transistor, a discharge resistor, and a switching circuit operable in response to the magnitude of the drain current of the field-effect transistor; the field-transistor, the switching element, the capacitor and the discharge resistor being embedded or potted in a molded plastic insulation. Since the capacitor and the discharge resistor are completely air- and water-tightly sealed, the highly reliable and dependable operation may be ensured even when used with a water-handling appliance such as a washing machine.
REFERENCES:
patent: 2974258 (1961-03-01), Garthwaite
patent: 3409901 (1968-11-01), Dost et al.
patent: 3463993 (1969-08-01), Beck et al.
patent: 3633050 (1972-01-01), Zajac
patent: 3721832 (1973-03-01), Lee
patent: 3894249 (1975-07-01), Minami et al.
patent: 3925720 (1975-12-01), Minami et al.
Minami Shunji
Oka Shunzo
Matsushita Electric - Industrial Co., Ltd.
Miller, Jr. Stanley D.
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