Electricity: motive power systems – Automatic and/or with time-delay means – Time or with time-delay means
Patent
1980-11-14
1983-02-22
Dobeck, B.
Electricity: motive power systems
Automatic and/or with time-delay means
Time or with time-delay means
3071418, H02P 516
Patent
active
043750486
ABSTRACT:
The invention relates to a time switch assembly of the type having an electric stepping motor, a pulse generator and a connecting drive therebetween for driving the motor at speeds corresponding to the frequency of the pulse generator. A time plate is driven by the motor and a scanning switching circuit is responsive to different speeds of the time plate. First and second counters in series are provided between the pulse generator and the motor. A switching device between the counters provides selectable bypassing of the second counter so that the motor may be driven at a speed corresponding to the output of only the first counter or at a slower speed corresponding to a slower counter output of the two counters operating in series.
REFERENCES:
patent: 3005940 (1961-10-01), Johnson
patent: 3215918 (1965-11-01), Lichowsky
patent: 3646417 (1972-02-01), Cassie et al.
patent: 4084122 (1978-04-01), Gettings
Eriksen Peter A.
Jespersen Aksel
Danfoss A/S
Dobeck B.
Easton Wayne B.
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