Method and apparatus for prescribing a time of day

Details Method and apparatus for prescribing a time of day Method and apparatus for prescribing a time of day

1978-04-11

1980-07-15

Hix, L. T.

Electrical transmission or interconnection systems

Switching systems

Condition responsive

315150, H01H 4300, H01H 3500

Patent

active

042130620

ABSTRACT:
The invention relates to electrical apparatus for indicating one or more prescribed times of day which occur between the hours of sunset and sunrise. The apparatus is photosensitive and operates in a manner so that the selected prescribed times are determined each day by utilizing detected sunrise and sunset times as the basis for the determination. This determination on a daily basis avoids accumulation errors which occur when the determination is on a cyclical basis as with the use of a clock.

REFERENCES:
patent: 3350581 (1967-10-01), Stein
patent: 3428861 (1969-02-01), Zinsmeyer
patent: 3555214 (1971-01-01), Lee
Hagerstown Town & Country Almanack for 1978, Gruber Almanack Co., Hagerston, Md., copyright, 1977.

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