Patent Model - Machine for Expanding Spectacle-Bows
Maker and role
George Cummings, Patentee
Production date
Sep 15 1857
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Object detail
Media/Materials
Steel
Measurements
4 1/4 x 8 1/2 x 3 1/2" (10.8 x 21.6 x 8.9cm)
Description
The nature of Cummings's invention "consists in the construction and operation of expanding jaw, or jaws, to finish forming the metallic rim of spectacle eyes." (Patent Number 18,194)
Collection
Object number
61.47.690
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Maker
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