US Patent: 1,382,247
|
| Device for operating the jaws of spanners and the like
|
|
Patentee:
|
|
| Robert Schäfer (exact or similar names) - Erfurt, Germany |
|
|
Patent Dates:
|
| Applied: |
Apr. 28, 1920 |
| Granted: |
Jun. 21, 1921 |
|
Patent Pictures:
[
1 | 2 | 3
]
|
|
Patent 1,382,247 (wrench) - edited drawing |
USPTO (New site tip)
Google Patents
Report data errors or omissions to steward
Stan Schulz
'VELOX" and "RAPID" spanners (Feb. 1922 ad) - edited (FLICKR)
|
|
Description: |
| An internal "nut" with interior threads and exterior "interrupted threads" is at the heart of this quick / screw adjustment means. The original German patents were DE-336,765 for the wrench, and DE-340,796 for the vise. The wrench was produced as the "RAPID" together with Schäfer's DE-340,985 as the "VELOX."
Both were advertised together in 1921 / 1922.
Note: Some machine translations will transliterate Schäfer into Schaefer. |
|
%20-%20edited%20drawing')){kind=link}
%20-%20edited%20drawing')){kind=link}
){kind=link}