| 摘要 |
<p>A supervisory alarm accessory for a fire sprinkler stop valve of the type including a rotatable valve actuator driving a valve spindle. The accessory contains an adaptor sleeve connectable between the actuator and the spindle to rotate with the actuator. The adaptor sleeve has an externally threaded part, and a fixed housing supported on the sleeve to permit relative rotation of the sleeve and enclosing the threaded part. A follower is threadably engaged with the threaded part and keyed to the housing. An alarm generator, and activating arrangement are supported on the housing and provide an activating connection between the alarm generator and the follower to initiate an alarm.</p> |
