US Patent: 222,744
|
| Improvement in Measuring Scales and Rules
|
|
Patentee:
|
|
| Lucian Sharpe (exact or similar names) - Providence, Providence County, RI |
|
|
Patent Dates:
|
| Applied: |
Sep. 30, 1878 |
| Granted: |
Dec. 16, 1879 |
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward
Joel Havens
"Vintage Machinery" entry for Brown & Sharpe Mfg. Co.
|
|
Description: |
| Three sided "draftsmen rule" made of sheet brass formed into a seamless tube and then formed into a triangular shape instead of using boxwood. Sold by DBS as the No 72. |
|
