US Patent: 255,236
|
| Electric drill
|
|
Patentee:
|
|
| Charles E. Ball (exact or similar names) - Philadelphia, PA |
| Manufacturer: |
| Not known to have been produced |
|
|
Patent Dates:
|
| Applied: |
Dec. 31, 1881 |
| Granted: |
Mar. 21, 1882 |
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward
Jeff Joslin
|
|
Description: |
| Not really a handheld, but is one of the earliest electric drills we have seen. The feed uses hydraulics and the drill itself is a hammer drill that both rotates oscillates back and forth. It is intended, apparently, for drilling rock. |
|
