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US Patent: 85,708
Improvement in Parallel Rules
Patentee:
Frederick A. Traut - New Britain, CT

USPTO Classifications:
33/454

Tool Categories:
rules : parallel rules

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
E. W. Bliss
Jeremy W. Bliss

Patent Dates:
Granted: Jan. 05, 1869

Patent Pictures:
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Description:
This patent for a parallel rule features a pair of graduated scales to allow the user to insure that the two blades are perfectly parallel.

The patent was granted to Frederick Traut, who was one of the Stanley Rule & Level company's premier inventors in the early years of the company, but this patent is not assigned to Stanley, nor was it produced by them.

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