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US Patent: 419,571
Wrench
Improvements in Ratchet Wrenches
Patentee:
Fredrick S. Thring - New York, NY

USPTO Classifications:
192/43.1, 81/62

Tool Categories:
wrenches : ratchet wrenches
wrenches : wrench components : wrench sockets

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
M. J. Clagett
Jos. H. Blackwood
Michael Duffy
J. Brown, Jr.
Thos. F. Gale

Patent Dates:
Applied: May 31, 1889
Granted: Jan. 14, 1890

Patent Pictures:
Fredrick S. Thring patent January 14, 1890
USPTO pdf tiff
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Description:
Reversible ratchet with interchangeable "chucks" (sockets). A swinging "T" frame holds the ratchet pawls. The specifications are vague on how the ratchet teeth and the chucks are connected, and how the chucks are retained in the frame.

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