Electrical transmission or interconnection systems – Vehicle mounted systems – Automobile
Patent
1978-12-11
1981-06-30
Hix, L. T.
Electrical transmission or interconnection systems
Vehicle mounted systems
Automobile
307141, 307590, 361195, H01H 4324
Patent
active
042764831
ABSTRACT:
A timed electric switch in a housing preferably for direct current loads such as for heating elements in vehicle windows, in which manually closable contacts supply current to the load and also to a digital timing circuit, which completes a circuit from said contacts through a holding solenoid for the contacts. After a predetermined count has been achieved in the timing circuit, the current supply through the holding solenoid is interrupted thereby releasing the contacts. Provision is made for allowing the second and subsequent timing periods to differ from the first timing period by independently supplying potential to the timing circuit, such as through the vehicle ignition switch. Reset of the timing circuit to produce the initial timing period once again is effected by switch off and re-operation of the ignition switch. An illuminated indication is provided, preferably by a light emitting diode, which operates when power is supplied to the load. Provision is made for altering the length of the second and subsequent time periods with respect to the initial timing period.
REFERENCES:
patent: 2898433 (1959-08-01), Felt
patent: 3303396 (1967-02-01), Culbertson
patent: 3393604 (1968-07-01), Lundin
patent: 3842375 (1974-10-01), Collette
patent: 3858027 (1974-12-01), Phillips
patent: 3898423 (1975-08-01), Taylor et al.
patent: 3939361 (1976-02-01), Aidala et al.
patent: 3944893 (1976-03-01), Hayden
patent: 3973140 (1976-08-01), Phillips
patent: 4047375 (1977-09-01), Wulff
patent: 4095213 (1978-06-01), Hayden
patent: 4101001 (1978-07-01), Smith
Dwyer James L.
Hix L. T,.
O'Connor James R.
O'Donnell Martin J.
O'Konski Thomas C.
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