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 34
the key stands straight up and down.Place the clock on the shelf and the keyunder the flange of lever, E. Pull lever, G,down out of the way and close the lever onthe switch. The alarm key will turn anddrop down, letting lever, E, drop into theV-shaped piece, D, and make connection. For the door… … Door Bell and Alarm Combined 32 POPULAR MECHANICS the back of the board. The switch andlevers are fastened with small screw bolts,which allows wiring at tin- back. Bspools in half and fasten the halves to thefour corners of the board at the hack andthe apparatus can be put up where one likes. HOW…
Handicraft · Amusements
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