| 摘要 |
A door hold-open device (10) adapted to work with a conventional single-arm door closer(C)comprises a shoe(24) moveable along a track (12) and connected to the closer operating arm(A). A detent in the form of a wheel(88) is provided in the track which can be lowered through linkages (60, 80) by a solenoid (70) to engage the shoe. Spring pressure on the detent can be adjusted in the field. The detent holds the shoe at one end of the track so that the door is held open. But the door can be forcibly closed causing the shoe to raise the detent, or the solenoid can be deactivated to raise the detent. |
