US Patent: 137,052
|
Dies for Forming Wrench-Heads Improvement in Dies for Forming Wrench-Heads
|
Patentee:
|
|
Luke Chapman (exact or similar names) - Collinsville, CT |
|
Patent Dates:
|
Granted: |
Mar. 25, 1873 |
Patent Pictures:
|
|
Luke Chapman Wrench Head Dies (Pat. Mar. 25, 1873) |
USPTO (New site tip) Google Patents
Report data errors or omissions to steward
Stan Schulz
|
Description: |
The patent is for a set of dies to form heads on monkey wrench bars by upsetting. "My invention consists in dies and process for forming a wrench-head upon a bar of the width and thickness of the wrench-bar, requiring only unskilled labor and at a great reduction of cost." Pat. no. 137,053 is a complement. |
|