Radiant energy – Photocells; circuits and apparatus – Photocell controls its own optical systems
Patent
1971-09-23
1976-11-23
Smith, Alfred E.
Radiant energy
Photocells; circuits and apparatus
Photocell controls its own optical systems
250214R, 317127, H01J 3912, H01H 4724
Patent
active
039935698
ABSTRACT:
A combination timer and photoelectrically activated control circuit to selectively repeat a timed electromechanical operation at dawn and/or dusk in response to sunrise and/or sunset conditions. Said photoelectric control timer being provided with a deactivating circuit which turns off the output to the load after a preselected time. The circuit remains off even though the initiating light conditions prevail, or reverse. For example, if set to operate with illumination, the device operates in the morning at about sunrise, and after the preset interval a deactivating circuit switches off the output which remains off the remainder of the day while daylight prevails. When daylight ebbs, the photoelectric initiating circuit resets and the entire circuit is reset to repeat the operation when light returns the following morning. An equivalent photoelectric initiating circuit is provided to trigger the timer when light conditions change from light to darkness, such as at sundown.
REFERENCES:
patent: 3421008 (1969-01-01), Shaw
patent: 3476943 (1969-11-01), Bruce
patent: 3502883 (1970-03-01), Archer
Biedermann David A.
Orr Francis D.
Zinsmeyer Herbert G.
Grigsby T. N.
Smith Alfred E.
Zinsmeyer Lois M.
LandOfFree
Photoelectrically triggered timing circuit for controlling elect does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Photoelectrically triggered timing circuit for controlling elect, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photoelectrically triggered timing circuit for controlling elect will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-230205