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US Patent: 79,767
Ornamenting Metals
Improvement in Screw Cutting Lathes
J. P. Theodore Lang - Washington, DC

USPTO Classifications:

Tool Categories:
metalworking machines : metal lathes : screwcutting lathes

J. P. Theodore Lang - Washington, DC
E. H. Ashcroft - Boston, MA
S. S. Fahnestock - Washington, DC

Not known to have been produced

S. S. Fahnestock
Joseph I. Peyton

Patent Dates:
Granted: Jul. 07, 1868

Patent Pictures:
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The nature of my invention consists in so constructing a lathe for chasing screws as to secure the machinery against unnecessary wear, as well as accident, and secure the operating machinist against any mistakes in chasing over the same thread, and at the same operation, saving a great deal of time.

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