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US Patent: 1,160,160
Louis E. Gaisser - Louisville, KY

USPTO Classifications:

Tool Categories:
wrenches : wrench adjustment types : self-adjust wrenches


Red Chief Manufacturing Company - Louisville, KY

J. R. Tomlin
R. L. Parker
Wm. C. Cross
Rogers King

Patent Dates:
Applied: Apr. 29, 1915
Granted: Nov. 16, 1915

Patent Pictures: [ 1 | 2 ]
Louis E. Gaisser patent November 16, 1915
USPTO pdf tiff
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The movable jaw slides from side to side by the rocking action of the handle. A thumb lever on the corner of the head allows for one-handed operation to adjust the size of the opening. The patent shows the wrench with flat nut jaws and curved pipe-gripping jaws.

The patent date appears on the L.G. AUTOMATIC WRENCH, although the external appearance and internal construction may be closer to Gaisser's Jan. 15, 1918 patent no. 1,253,227. A mid-1920s ad lists the wrench in 6 inch and 8 inch sizes, either black or nickel finish.

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