Small, Sidney Aylmer, 1876- [from old catalog] · Chicago, F. J. Drake & co · leaf 353
acrossthe low voltage coil and thereby releasing the trigger. The Tell Tale is merely a mechanically operatedswitch, which the opening of the breaker closes. Thetell tale may close the circuitof an electric bell and callthe attendants attention. It usually rings a bell and lights a lamp. It mayeven… … Lifting Tabl» Lifting Cam Fig. 168. Oil Circuit Breaker. ELECTRICAL WORK—ROWER 355 ers of type shown in Fig. 168 are used. A magnetwhen current is too large operates the valve which ad-mits air to the cylinder. The cylinder piston through awooden rod operates the main contact first and then…
Electricity
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