Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 118
rt-circuited, the vibratiuii bell servintr asinterrupter for the wiiole series. Obvi-ouslv tin-: system re(]uire3 a higher volt M Kiu. I-.. age tium parallel connection, and the cells must be of sutlicient F.M.F. to ring the bells satisfactorily. Sveral bell-, iii.iy bt> connected in tliis way.… … places,out* uf 01 82 ELECTRIC BELL WIRING several floors, or the bell in the office of a hotel may be rung fromany one of several different rooms. In this case it is neoessary tohave some device to indicate from which push the bell was rung.The annunciator furnishes this information very well. A…
Architecture · Building
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