ace plate into the interior of the case, and is connected rigid- COOPERS FIRE ALARM, ly with a rod, o. The rods, o o, have spiral springs ] carried once or twice round a belaying pin, and iswound around them tending to force the slides, M, then connected with a thread or small twine which istoward… … dows, and secured by winding its end upon a buttonprovided for the purpose. If a fire occurs in the room, it burns off the pre-pared thread, allowing the cord to unwind from itsbelaying pin, thus releas-ing the wire, p, and permit-ting the slide, M, to bethrown inward by the spir-al spring upon the…
Combination · Patents · Manner · Claim · Iron · Purpose · Purpose set · Improvement · Maximum charge · Manner set · Scientific American · Address munn · Cast Iron · Wrought iron · Main frame · Purposes set · Grass roots
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