Illustrated catalogue and price list of bells, electric gas burners, batteries, push buttons ... (1899)
Novelty Electric Company · Novelty Electric Company · leaf 46
50, 52 <fc 54 NORTH FOURTH STREET, PHILADELPHIA, PA. 45 SIGNAL OR STRAP KEYS Cat. No. PRICES 935. Open circuit i 75 936. Close. 1 75 Cat. No. pbice 1 00 938. Metal base, top and bottom contact$1 00 987. Top and bottom contact, … bringing the arrow to a perpendicular position, stops the ring- ing of the bell. In connection with an electric floor bell this attachment is valuable, causing the electric vibrating bell to ring till the call is answered by the servant, and the connec- tion broken by turning the knob. When…
Electricity · Wiring devices · Telephones
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