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US Patent: 318,981
Tuning Hammer
Patentee:
Andrew W. Green - Peoria, IL

USPTO Classifications:
81/52, 84/459

Tool Categories:
wrenches : socket wrenches

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
H. W. Wells
Rich'd A. Goldsbrough

Patent Dates:
Applied: Oct. 03, 1883
Granted: Jun. 02, 1885

Patent Pictures:
Andrew W. Green patent June 2, 1885
USPTO pdf tiff
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Description:
Tuning hammers are specialized socket wrenches for tuning pegs on pianos. This one has an adjustable socket -- one side of the socket has a piece moved in or out by set screws.

The sockets are called wrenches in the specifications.

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