发明名称 |
DEURBEDIENINGSINRICHTING. |
摘要 |
A reversible motor operates a vertically movable door through transmission means including a friction clutch. Control means receiving the output of a tachometer generator driven by the driven member of the friction clutch are arranged to switch off the motor automatically in response to a predetermined deviation downwards of the rate of rotation caused by an obstruction in the path of the door. The system may include means for automatically re-starting the motor in the opposite direction subsequent to a switching-off caused by an obstruction to the travel downwards of the door. |
申请公布号 |
NL7710709(A) |
申请公布日期 |
1978.10.02 |
申请号 |
NL19770010709 |
申请日期 |
1977.09.30 |
申请人 |
CRAWFORD DOOR AB TE TORSLANDA, ZWEDEN. |
发明人 |
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分类号 |
E05F15/00;E05F15/16;H02H7/085;H02H7/093;(IPC1-7):05F15/20 |
主分类号 |
E05F15/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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