| 摘要 |
A device (10) for closing swinging doors of the type utilizing a rotating member to compress a spring (40) during door opening to store energy in the spring (40) to effect a closing of the door is provided with a driving connection to a d.c motor/generator (62) effective to cause rotation of the motor during a closing movement of the door. The motor/generator (62) acts as a generator during the closing with the generated electrical energy fed back to the motor/generator (62) to retard rotation of the rotor, providing a brake on the closing movement of the door. The feedback circuitry includes a switch (82) disabling or diminishing the braking during the final degrees of closing movement as well as a variable setting device (80) allowing control of braking force. <IMAGE> |
