Journal - Franklin Institute of the State of Pennsylvania (1826)
Franklin Institute, Philadelphia, Franklin Institute (Philadelphia, Pa.) · [Philadelphia : Franklin Institute] · leaf 422
nd efficient, with noliability of locking or unlocking, except at the will of the ope-rator. Items and Novelties. 369 Screw Slotting Machine.—By Brown & Sharpe ManufacturingCompany. Quite an extensive machine is often used by guumakersand others for slotting the heads of screws, but the device… … the bed of a hand-lathe, the long lever projecting in front at a rightangle with the bed. An arbor carrying a circular cutter is held inthe centres of the lathe. The long lever is moved horizontally toopen the jaws for inserting and removing the screws, and downwardto bring the screw to be slotted…
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