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Scientific American, Vol. 57, No. 26 (December 1887) (1887)

leaf 4

An illustration from Scientific American, Vol. 57, No. 26 (December 1887), 1887, leaf 4
ntly press the rail partly by the same bolt which holds the diagonal bolt forward, the handle of which projects through an brace to this rail. This angular plate is also held firmly opening with side -notches to permit the turning of by a nut which locks thereon the end of the vertical the handle… … CLABEK'S DOOB BOLT. Pig. 2, so that it will exert a cam action in the keeper for closing the door tightly. When the handle stands at right angles to the door, as shown in Figs. 1 and 3, the flat surface on one side of the extremity of the HOLTON'S GATE. bolt will face outward, and in this position…

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