Title: Control circuit for providing time selected application of A.C. power

Abstract: A solid-state programmable control circuit provides multiple time selected application of A.C. power to one or more utilization circuits or devices. The control circuit uses a crystal controlled time base generator which is synchronized to commercial A.C. power. Stand-by battery power is provided to maintain timing when A.C. power is lost. A time display plug-in module is used with the circuit for setting the time for the control circuit. Programming can be done at a point remote from the control circuit.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Lee, John H. (North Oaks, MN, US)
Lind, Peter A. (Afton, MN, US)

Application Number: 818652
Filing Date: 1977-07-25
Publication_date: 1979-03-20
Assignee: Minnesota Mining and Manufacturing Company (St. Paul, MN)
Primary Class(es): 307/43 307/66, 307/141, 368/159, 368/204
Other Classes:
US Patent Ref:

3394674	Jul, 1968	Downing	116/63.
3400366	Sep, 1968	Downing	340/124.
3456123	Jul, 1969	Pihl	307/141.
3733810	May, 1973	Girard	58/4.
4020358	Apr, 1977	Wyland	307/141.
4023343	May, 1977	Martinet	58/23.
4040247	Aug, 1977	Haydon	58/23.

Other Refs:
Primary Examiner: Rubinson, Gene Z.
Assistant Examiner: Ginsburg, Morris
Attorney: Alexander; Cruzan, Sell; Donald M., Marben; Robert L.