Illustrated catalogue and price list of bells, electric gas burners, batteries, push buttons ... (1899)
Novelty Electric Company · Novelty Electric Company · leaf 82
50. 52 & 54 NORTH FOURTH STREET, PHILADELPHIA, PA. 81 MAGNETO CIRCUIT CLOSING ATTACHMENT … In many places the ordinary Magneto and Extension Bells do not ring Long or loud enough to he heard ; especially is this true in noisy factories. In such cases this attachment will he found valuable. It is arranged to close a local circuit and ring a vibrating electric bell until reset, which is…
Electricity · Wiring devices · Telephones
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