Light actuated curtain puller

Details Light actuated curtain puller Light actuated curtain puller

1985-09-03

1989-09-05

Ro, Bentsu

Electricity: motive power systems

Automatic and/or with time-delay means

Radiant energy

49 25, 160 5, E05F 1520

Patent

active

048642010

ABSTRACT:
An automatic electro-mechanical device for opening and closing a curtain or drapery in response to changed light striking a photoelectric cell on the device. The device comprises a miniature high torque reversible electric motor and control packaged in a container of substantially the same size as a conventional cord tensioner of curtains or draperies. To close the drapes at sun-down and open the drapes at sun-up automatically without actuation if the lighting changes for short periods of time, the device comprises a dual timer circuit with individual ramping circuits. One timer circuit monitors the sustained presence or absence of light for a predetermined amount of time. The other timer regulates the motor drive run time. A flip flop circuit signals the current state of the curtains or drapes by providing memory of the last directional movement of the motor.

REFERENCES:
patent: 2149481 (1939-03-01), Bosch et al.
patent: 3529214 (1970-09-01), Corn
patent: 3646985 (1972-03-01), Klann
patent: 3675023 (1972-07-01), Kunke et al.
patent: 4471275 (1984-09-01), Comeau

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