Twentieth century handbook for steam engineers and electricians, with questions and answers; a practical nontechnical treatise on the care and management of steam engines, boilers and electric machinery (1922)
Swingle, Calvin Franklin, 1846- [from old catalog] · Chicago, F. J. Drake & company · leaf 1336
Fig. 607type b westinghouse oil circuit breaker pole of the breaker. Each stationary contact is supportedby a porcelain insulator, rigidly secured to the frame. Theleads are brought to the terminals of the stationary contactwithin the insulator, forming an unbroken and continuous 1302 Steam…
