US Patent: 331,481
|
Ruler
Six-Sided Rolling Ruler
|
|
Patentee:
|
|
| Myer Dittenhoefer (exact or similar names) - New York, NY |
|
|
Patent Dates:
|
| Applied: |
Jan. 02, 1885 |
| Granted: |
Dec. 01, 1885 |
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward
Ralph Brendler
|
|
Description: |
| This ruler looks somewhat like an engineering scale with six sides instead of the usual three. Unlike an engineer's scale, however, it does not use different scales on each face-- all faces are marked in inches.
Each edge of this ruler is cut with a decorative pattern, but also features a straight edge just above it. By varying the angle of the pen you could get either a decorative line or straight line. It could also be used like a rolling ruler to draw multiple parallel lines.
Known examples are made of hard rubber, and are marked with the patent date. |
|
