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US Patent: 61,537
Metal Nut
Patentees:
William Harris - Rush Run, OH
Clinton Browning - Rush Run, OH

USPTO Classifications:
411/141, 411/974, 81/119

Tool Categories:
wrenches
wrenches : wrench components : wrench jaw components

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
T. B. Litten
John Trainer

Patent Dates:
Granted: Jan. 29, 1867

Patent Pictures:
Harris & Browning Pat. Jan. 29, 1867
USPTO pdf tiff
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Description:
This patent is for a nut with an attached spring which would prevent loosening until released by a wrench with an angled groove in the throat. The wrench itself is noted as being the subject of a separate patent application, although it is prominent in the drawings for this patent.

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