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US Patent: 1,072,807
Ratchet Driving Mechanism
Patentee:
Frederick H. Ayer - Chicago Heights, IL

USPTO Classifications:
192/43.1, 74/577R, 81/63

Tool Categories:
wrenches : ratchet wrenches

Assignees:
None

Manufacturer:
F. H. Ayer Mfg. Co. - Chicago Heights, IL

Witnesses:
Milton Lenoir
Joyce M. Lutz
Emilie Rose
Albert H. Graves

Patent Dates:
Applied: Jun. 10, 1912
Granted: Sep. 09, 1913

Patent Pictures:
Frederick H. Ayer patent September 9, 1913
USPTO pdf tiff
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Description:
A projection on an external adjusting ring shifts a rocking ratchet dog to engage teeth cut in the internal surface of the extended shank of the tool.

A screw through the shank engages a groove in the ratchet head to hold the parts together.

The ratchet driver based on this patent also uses the sliding rod handle and handle position retaining spring described in Ayer's Sept. 26, 1916 patent (no. 1,199,737). The alternate shifting means described in patent nos. 1,199,737 and 1,199,738 are not used in the tool as manufactured.

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