Improvements in and connected with the Construction of Theatres and like Public Buildings.

摘要

1769. More, J. Jan. 23. Hooks.-A flue, built over the stage of a theatre to deflect fire and smoke from the proscenium and auditorium in the event of fire, is provided with a damper partially balanced by a weight. The further balancing-weight h, Fig. 4, is suspended from a Look k, the lower part of which forms one arm of a lever n, so that, when the circuit of the solenoid q is completed by the thermostat or switch s, the armature p is attracted and the weight h is released,