Builder's hardware; a manual for architects, builders and house furnishers . which is disposed radi-ally a series of flat slidersworking up and downthrough slots in a fixedhorizontal plate. Thesliders have notches onthe outer edges, cut atdifferent heights, so thatthe cylinder can revolveonly when the notcheson the sliders are on aline and level with theplate. The sliders areforced upward by a sin-gle central coiled key consists of atube, on the sides of whichare straight grooves cor-responding to the de-sired dej>ression of theslides, with a shoulder toturn the cylinder. Thelock
Builder's hardware; a manual for architects, builders and house furnishers . which is disposed radi-ally a series of flat slidersworking up and downthrough slots in a fixedhorizontal plate. Thesliders have notches onthe outer edges, cut atdifferent heights, so thatthe cylinder can revolveonly when the notcheson the sliders are on aline and level with theplate. The sliders areforced upward by a sin-gle central coiled key consists of atube, on the sides of whichare straight grooves cor-responding to the de-sired dej>ression of theslides, with a shoulder toturn the cylinder. Thelocking-bolt is moved by an eccentric attached to the cylinder. The notches on the sliders are disposed as irregularlyas possible, and false notches are added, with correspondingfalse widenings of slots in the plate. All of the sliders can bepushed in farther than is needed to bring the notches on a linewith the plate, so that the lock is picked with great difficulty. Cotterills lock, Figures 293, 294 and 295, is anotherexample of English ingenuity. The portion which is acted.
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License: Licensed
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Keywords: ., bookcentury1800, bookdecade1890, bookidbuildershard, bookyear1890
