US Patent: 502,997
|
Monkey Wrench
|
Patentee:
|
|
Edwin Sylvester Pratt (exact or similar names) - Parry Sound, ON Canada |
Manufacturer: |
Not known to have been produced |
|
Patent Dates:
|
Applied: |
Mar. 23, 1893 |
Granted: |
Aug. 08, 1893 |
Patent Pictures:
|
|
Edwin S. Pratt patent August 8, 1893 |
USPTO (New site tip) Google Patents
Report data errors or omissions to steward
Stan Schulz
|
Description: |
The adjusting nut is mounted on a pivoting plate, so that it can be moved into and out of engagement with the rack threads on the main shank.
Canadian patent CA-43,855 issued August 7, 1893 and British patent GB-189313389 registered July 10, 1893 are parallel patents for the same design. |
|