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 29
e not easy to explain, is Benhams colortop. Cut out the black and white discshown in the figure, and paste on a piece ofstiff cardboard. Trim the edges of the cardboard to match the shape of the disc, andmake a pin hole in the center. Cut thepin in half and push through from theunder side until the… … An Optical Top POPULAR MECHANICS D1RECT=C0NNECTED REVERSEFOR SMALL MOTORS. ALARM CLOCK TO PULL UP FUR=NACE DRAFT A simple reverse for small motors can beattached directly to the motor as shown inFig. 1. Fig. 2 shows the construction of thereverse block: A is a strip of walnut % in.square and 3i in.…
Handicraft · Amusements
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