13th January 1933, Page 50
13th January 1933
Page 50

Page 50, 13th January 1933
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A Development In Trolley-bus Control
T lEmrecently granted patent (384,433) of Mr. J. G. Smithson, of Oakdale, Alvechurch, Worcestershire, should be of great interest to those concerned with the operation of......
The Marchant-stewart Electro-magnetic Injector
I N our recent description a the interesting Marchant-Stewart oil engine, we mentioned the fact that the injectors, or, rather, injector pumps, employed were of particularly......