Photoelectric switch and dimmer control

Details Photoelectric switch and dimmer control Photoelectric switch and dimmer control

1977-07-08

1978-11-14

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

250214AL, H01U 3919

Patent

active

041257677

ABSTRACT:
A combination electric lamp dimmer with automatic photocontrol which is adapted for mounting within a conventional electrical junction box such as mounted within walls. The devices includes a rotary dimmer switch for adjusting the current magnitude provided to the lamp to establish the magnitude of light produced thereby. The position of the dimmer switch is controlled by a manually rotatable knob. The knob includes an opening in it to allow ambient light to pass therethrough. A photocell is mounted behind the knob. When a knob is rotated to a position wherein the opening is disposed over the photocell, the photocell is enabled to monitor the ambient light. When the ambient light intensity drops below a predetermined value, the photocell and switch means responsive thereto enable current to be provided through the dimmer to the lamp to illuminate it.

REFERENCES:
patent: 2917663 (1959-12-01), Engelmann
patent: 3500455 (1970-03-01), Ross et al.

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