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Expired
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William Ashforth Openshaw
Norman Openshaw
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Individual
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Individual
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Perforating, Stamping-Out Or Severing By Means Other Than Cutting
(AREA)
Abstract
24,990. Openshaw, W. A.. and Opensha.w, N. Nov. 20. Tools ; tool-holders.-In a hand chasing-tool for cutting screw threads, the chaser c is provided with two cutting-edges by dividing a screwed cylinder into halves. The edges may be ground along radii. It is held in a seating curved to fit its diameter by a plate e having a projection e' engaging the groove in the chaser.
GB190824990D1908-11-201908-11-20Improvements in Hand Chasing Tools for Cutting Screw Threads.
ExpiredGB190824990A
(en)