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US Patent: 745,281
Wrench for Threshing Machine Cylinders
John T. Hume - Newton, IA

USPTO Classifications:
192/44, 74/157, 81/177.85, 81/59.1, 81/DIG.8

Tool Categories:
wrenches : cylinder tooth wrenches


Maytag Co. - Newton, IA

Geo. F. White
H. Manger
T. G. Bryant
Asa Moler

Patent Dates:
Applied: Sep. 29, 1902
Granted: Nov. 24, 1903

Patent Pictures:
John T. Hume patent November 24, 1903
USPTO pdf tiff
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The curved shank and thin head allow the head to be slipped between the bars to reach the nuts inside the cylinder. The gripper for the ratchet action is a small toothed roller which can be shifted to either side of the center line for reversible ratchet action. The shifting mechanism is a rod running through the center of the shank, with a leaf spring at the end. The handle end of the rod has a knurled nut.

Ken Cope's "American Wrench Makers 1830-1930" identifies this as the first cylinder tooth wrench supplied by the Maytag Co.

Corresponding Canadian patent no. CA-91872 issued Febr. 28, 1905 was assigned to the Parsons Band Cutter and Self Feeder Company.

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