Light actuated curtain puller

An electric drapery puller comprising a motor and motor drive circuit, means to sense a change in light level and a control circuit connected to the light sensing means and the motor drive circuit,

• first and second timing circuits in the control circuit, said first timing circuit adapted to start and reset in response to change in light level beyond a threshhold level, said second timing circuit adapted to start in response to attainment of an electrical threshhold reached by the first timing circuit and said second timing circuit in response to attainment of an electrical threshhold adapted to signal the control circuit to halt the motor.

An electric drapery puller comprising a motor and motor drive circuit, means to sense a change in light level and a control connected to the light sensing means and the motor drive circuit,

• means engageable with a drapery cord and actuateable by the motor,
• enclosure means attached to the motor frame and attachable to a stationary support, said enclosure means including elastic means in the attachment to the support,
• first and second timing circuits in the control circuit, said first timing circuit adapted to start and reset in response to change in light level beyond a threshhold level, said second timing circuit adapted to start in response to attainment of an electrical threshhold reached by the first timing circuit and said second timing circuit in response to attainment of an electrical threshhold adapted to signal the control circuit to halt the motor.

An electronic control apparatus responsive to changes in light levels to move an object between first and second predetermined positions comprising;

• light sensing means for sensing changes in light levels, motor means operatively connected to the object and actuable for moving the latter between said positions and control circuit means operatively interconnecting said light sensing means and said motor means for actuating said motor means to move the object between said positions in response to a change in light levels for a predetermined period of time and to deactivate said motor means when the object reaches said first or second positions, said control circuit means including a first or second circuit means connected to said light sensing means for determining a first predetermined time period of a change in light level and a second timing circuit means interconnecting said first timing circuit means and said motor means for determining a second predetermined time period said motor means will actuate to move the object to said first and said second positions.