File:Blower worm gear.png
Size of this preview: 408 × 599 pixels. Other resolutions: 163 × 240 pixels | 327 × 480 pixels | 523 × 768 pixels | 697 × 1,024 pixels | 2,320 × 3,408 pixels.
Original file (2,320 × 3,408 pixels, file size: 87 KB, MIME type: image/png)
 | The text and illustrations of US patents are in the public domain in the United States unless the patent text contains a specific notice that portions are copyrighted.[1][2][3]
The original patent contains no such notice, so its contents are in the public domain in the United States. |
Summary[edit]
1907 US patent image of multi-start worm gear as used in hand-cranked blower. Patent US869247 by Henry Keiper.
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 06:24, 17 March 2021 | | 2,320 × 3,408 (87 KB) | Drf5n (talk | contribs) | 1907 US patent image of multi-start worm gear as used in hand-cranked blower. Patent US869247 by Henry Keiper. https://patents.google.com/patent/US869247A/en |
You cannot overwrite this file.
File usage
The following pages on the English Wikipedia use this file (pages on other projects are not listed):
