US Patent: 392,300
|
| Wrench
|
|
Patentees:
|
| Nathaniel W. Vandegrift (exact or similar names) - Bridgeport, CT |
| Frank Armstrong (exact or similar names) - Bridgeport, CT |
|
|
Patent Dates:
|
| Applied: |
Oct. 15, 1887 |
| Granted: |
Nov. 06, 1888 |
|
Patent Pictures:
[
1 | 2
]
|
|
Armstrong and Vandegrift Pat. Nov. 6, 1888 |
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward
Stan Schulz
|
|
Description: |
| This modification of Vandegrift's May 6, 1884 patent (No. 298,043) lengthens the adjustable jaw and frame so the threaded portion of the adjustable jaw does not extend to the bearing surface of the frame. |
|
){kind=link}
')){kind=link}