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 25
to a sliding <loor, the mate-rials required are: Three flat pulleys, anold electric bell or buzzer, about 25 ft. of the key. for the drcull cannot be , loted withan ordinary nail or wire. B, Icatch B, Pig. 1, enlarged; 0, Fig. 2, li thecat throngb which the rope runs. 11. i .. is an elastic that… … Electric Lock for Sliding Door clothesline rope and some Xo. 18 wire. Thewooden catch, A (Fig. l),must be about 1 in.thick and 8 in. long; B should be of the samewood, 10 in. long, with the pivot 2 in. fromthe lower end. The wooden block, C, whichis held by catch B, can be made of a 2-in.piece of…
Handicraft · Amusements
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from [Graphophone patents] (1878)](https://img.insideoutlibrary.com/img/200/ia-graphophonepaten02unit-742-316.webp)
