Patent Model - Improvement in Ratchet-Drill
Maker and role
Charles Sinclair, Patentee
Production date
Sep 01 1868
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Object detail
Media/Materials
Brass, steel
Measurements
4 x 12 1/4 x 4 1/4" (10.2 x 31.1 x 10.8cm)
Description
Sinclair's invention relates to "a new ratchet-drill of that class which is turned or rotated in the same direction, in whatever direction the handle may be turned or oscillated." (Patent Number 81,694)
Collection
Object number
2015.14.912a,b
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Maker
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