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US Patent: 267,655
Plumb Bob
Willis C. Vajen - Indianapolis, IN

USPTO Classifications:
33/308, 33/332, 33/350, 33/354, 33/392

Tool Categories:
layout tools : plumb bobs

Vajen and New - Indianapolis, IN


R. P. Daggett
James B. Lizius
C. Bradford
Chas. L. Thurber

Patent Dates:
Applied: Nov. 10, 1881
Granted: Nov. 14, 1882

Patent Pictures: [ 1 | 2 ]
Willis C. Vajen patent November 14, 1882
USPTO pdf tiff
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The patent is for the interchangeable point and line holder, which allow the point to be stored in the body of bob, and the heavy portion of the body to be closest to the point. The specifications discuss work situations where this feature would be preferred.

A known example matches the patent drawings, and is marked with the patent date.

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