US Patent: 51,967
|
| Improvement in Compasses and Calipers
|
|
Patentees:
|
| Frank P. Pfleghar (exact or similar names) - New Haven, CT |
| William Schollhorn (exact or similar names) - New Haven, CT |
|
|
Patent Dates:
|
| Granted: |
Jan. 09, 1866 |
|
Patent Pictures:
[
1 | 2
]
|
|
|
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward
Ralph Brendler
|
|
Description: |
| This design uses a tapered thumbscrew to lock the arm in place against a direct-reading scale.
Note that one of the witnesses here holds a previous caliper patent (John Earle: 19,058 - 1/05/1858). |
|
){kind=link}
){kind=link}