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US Patent: 428,193
Balance Wheel Pliers and Calipers
Improvements in Combined Calipers and Balance-Wheel Truing-Pliers
Patentee:
George B. Widdifield - Columbia City, IN

USPTO Classifications:
33/203.1, 7/101, 7/125, 81/6

Tool Categories:
pliers

Assignees:
George B. Widdifield - Columbia City, IN
William H. Shiffler - Columbia City, IN

Manufacturer:
Not known to have been produced

Witnesses:
A. Thatcher
S. L. Miller
O. H. Woodworth
H. O. Clapham

Patent Dates:
Applied: Sep. 12, 1889
Granted: May 20, 1890

Patent Pictures:
George B. Widdifield patent May 20, 1890
USPTO pdf tiff
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Description:
The adjustable sockets in the jaws are to hold a watch balance-wheel by its pivots. The swinging latch on the handle combined with the rack teeth on the other handle hold the pliers closed. The spring holds the latch in engagement with the rack teeth.

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