Manually operatable electric curtain

Details Manually operatable electric curtain Manually operatable electric curtain

A - Human Necessities

47

H

160/17

A47H 5/032 (2006.01)

Patent

CA 1292938

ABSTRACT OF THE DISCLOSURE A manually and automatically operable curtain is provided with an electric motor, a planetary gearing of which the sun gear is fixed to the output shaft of the motor, a driven gear engageable with the planet gear of the planetary gearing, a cord pulley fixed to the driven gear for drawing the curtain, and an electric control system including a motor-reversing means. The rotation of the motor is transmitted to the cord pulley through the intermediary of the planet gear when the motor turns. Responsive to a signal to stop the motor, the motor-reversing means reverses the motor for a very small time so as to disengage the planet gear from the driven gear. Thus, the curtain is easily operated by hand without receiving the rotational resistance of the motor.

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