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US Patent: 893,431
Machine for Cuting Screw, & c.
James Bowen - Philadelphia, PA

USPTO Classifications:
409/76, 409/78, 470/176

Tool Categories:
metalworking machines : metal lathes : screwcutting lathes

Sayre Stamping Co. - Sayre, PA

Not known to have been produced

Robert J. Byron
Edmund W. Kirby
V. S. Diven
L. V. Stoelzler

Patent Dates:
Applied: Dec. 28, 1906
Granted: Jul. 14, 1908

Patent Pictures:
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Eugene Diven - patent attorney

This invention relates more particularly to improvements in machines wherein a rotating cutter is employed for cutting screw threads upon rods of considerable length, and for turning and finishing the surfaces of shafts, rolls and the like. One object of my improvements is to provide a machine of this character which will accurately cut screws of long lengths, and which may also be employed to give a true and smooth finish to cylindrical surfaces of various shapes. A further object is to so arrange the lead screw that the work will be directly driven thereby, and to provide a differential driving and feed mechanism whereby, with a minimum number of change-gears of comparatively small diameters, the longitudinal travel of the lead screw may be perfectly regulated, with relation to its rotary motion, in conformity with any pitch of thread or width of cut which it may be desired to make; in other words, to render the machine universal; capable of cutting all the different pitches and styles of screw threads, whether right or left hand, without changing the lead screw.

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