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Charles Hall
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Individual
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B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
B23G—THREAD CUTTING; WORKING OF SCREWS, BOLT HEADS, OR NUTS, IN CONJUNCTION THEREWITH
B23G1/00—Thread cutting; Automatic machines specially designed therefor
B23G1/16—Thread cutting; Automatic machines specially designed therefor in holes of workpieces by taps
B23G1/20—Machines with a plurality of working spindles
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Abstract
14,597. Hall, C. June 22. Tapping. - A tapping-machine consists of a frame carrying a spindle on which are mounted two clutch portions B<1>, B<2> adapted to engage corresponding clutch portions C', C<3> respectively on reversely-driven pulleys A', A<2>, the spindle being adapted to slide in the pulleys and held in the disengaged position by springs D', D<2>.
GB191214597D1912-06-221912-06-22A Machine for Tapping Holes in all kinds of Metals.
ExpiredGB191214597A
(en)