Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 269
he pawls throw one or the other pawl out of lockfor reversing the motion. 1020. RECIPROCAL CIRCULAR MOTION from rec-^ tiiinear motion of a nut on a quick thread. The reciprocat-ing or Persian drill stock. The screw is swivelled in thehead of the stock, allowing a free movement of the drill bythe… … 1022. CONTINUOUS MOTION RATCHET from an oscillating arm. Three bevel gears, two of which have ratchets with pawls on opposite sides, so that there is a forward motion to the spindle at each stroke of the arm. 1022 a. Elevation. 1023. STOPS OF VARIOUS FORMS fora ratchet wheel. Hook and straight…
Mechanical movements
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