US Patent: 7,257 - Divider or Compass


	Home\| FAQ	Search:Advanced\|Person\|Company\| Type\|Class	Login


Quick search:	Patent number:	Patent Date:

US Patent: 7,257

Divider or Compass

Patentee:

Dexter H. Chamberlain (exact or similar names) - Boston, MA

USPTO Classifications:

217/31, 33/558.06

Tool Categories:

layout tools : compasses : dividers

Assignees:

Homers & Ladd - Boston, MA

Manufacturer:

Not known to have been produced

Witnesses:

Gridly J.F. Bryant

Ezra Lincoln, Jr.

Patent Dates:
Granted:	Apr. 09, 1850

Patent Pictures:

USPTO (New site tip)
Google Patents
Report data errors or omissions to steward Ralph Brendler

Description:

This divider provides a micrometer adjustment by cutting teeth in the outside of the arm, and providing a worm gear attached to a thembscrew to engage these teeth.