Amateur mechanics ... a book for old and young who like to make things .. (1907)
Popular mechanics magazine, Chicago. [from old catalog] · Chicago, Popular mechanics · leaf 20
which is in the door, thus locking the doorTo unlock the door, merely push the but-ton, E. The magnet then draws the arma-ture out of the screw eye and the door isunlocked. The dotted bine at D shows theposition of the armature when the en Iis implete and the door unlocked. Theweight must be in… … For Reversing a Currentis placed on with the big arrow. A. pointingas in the direction indicated in Fig. 3, thecurrent flows with the small arrows Toreverse turn through an angle of 90 degrees(Fig. 4).—Contributed by F. CrawfordCurry, Brockville, Ontario, Canada. 16 POPULAR MECHANICS BICYCLE POWER…
Handicraft · Amusements
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
