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US Patent: 148,065
Improvement in Calipers
Patentee:
Eli Horton (exact or similar names) - Windsor Locks, CT

USPTO Classifications:
33/558.2

Tool Categories:
layout tools : calipers

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Wm. E. Simonds
John Pollitt
Timothy E. Steele

Patent Dates:
Applied: Dec. 11, 1872
Granted: Mar. 03, 1874

Patent Pictures:
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Ralph Brendler
Description:
This design is for a "3-point" caliper, used for accurately taking the diameter of a screw inside the thread.

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