US Patent: 325,973 - Mainspring-Winder


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US Patent: 325,973

Mainspring-Winder

Patentee:

Albert F. Robbins (exact or similar names) - Orange, MA

USPTO Classifications:

81/7.5

Tool Categories:

trade specific : watchmaker

Assignees:

None

Manufacturer:

Unknown

Witnesses:

J. H. Hackelton

W. B. Andrews

Patent Dates:
Applied:	Jan. 26, 1885
Granted:	Sep. 08, 1885

Patent Pictures: [ 1 | 2 ]

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Description:

This is an improvement on Bobbin's Patent 308096 allows for the use of interchangeable barrel or heads for different sized sizes of main-springs. Sample has both the Nov. 18,1884 and Sept. 9,1885 dates.