Patent Model - Improvement in Ratchet-Drill
Maker and role
Charles Sinclair, Patentee
Sep 01 1868
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4 x 12 1/4 x 4 1/4" (10.2 x 31.1 x 10.8cm)
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)
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