American horological journal, devoted to practical horology (1869)
Miller, George B · New York, G. B. Miller · leaf 261
efinger collar, a spring, d,and below, a set screw, c,to fasten the screw-driverinto its lower end. Theblock, b, with its containedscrews, is placed under the revolving screw-driver, and moved by the operator so that ascrew is brought under the driver, which isthen pressed down by the finger, and… … One of the neatest little arrangements is forproducing the little eccentric screws used asbanking pins. This is aecomplished by adouble-faced steel disk, the periphery of oneface being concentric with the hole tapped forthe screws, and the periphery of the other diskbeing sufficiently eccentric to…
Clocks and watches
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