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US Patent: 1,199,737
Ratchet Mechanism
Frederick H. Ayer - Chicago Heights, IL

USPTO Classifications:
192/43.1, 81/177.5, 81/177.85, 81/63

Tool Categories:
wrenches : ratchet wrenches


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

Arthur W. Carlsen
Robert H. Weir

Patent Dates:
Applied: Dec. 23, 1915
Granted: Sep. 26, 1916

Patent Pictures: [ 1 | 2 ]
Frederick H. Ayer patent September 26, 1916
USPTO pdf tiff
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Improvement to patent no. 1,072,807. The major features of the patent are a spring to hold the rod handle in position, and a modification to the ratchet reversing mechanism.

The second image shows a ratchet tool marked F.H. AYER MFG. CO. CHICAGO HEIGHTS ILL. PAT. SEP 9, 1913 SEP. 26, 1916. It has the rod handle as described in this patent, and the ratchet shifting mechanism from the earlier patent.

Another variation of the ratchet shifting mechanism appears in patent no. 1,199,738.

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