Twentieth century hand-book for steam engineers and electricians with questions and answers; a practical non-technical treatise .. (1913)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 968
Fig. 386 OTIS LEVER CAR SWITCH Electro magnets are employed throughout, thereby elim-inating the use of all rheostats, sliding contacts, or othereasily deranged devices. The contacts and wearing partsJiin the controlling mechanism are of ample dimensions torimeet the severe conditions, and exacting…
