File:Variable resistance exercising device.png
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| Description | An improved exercising device for exercising the legs of a user includes a frame member with a lever arm having one end pivotably attached thereto. The lever arm extends downwardly from the portion of the frame member to which it is pivotably connected, and a pair of foot-engaging force transferring members are mounted on the lower end of the lever arm. A cable has one end pivotably connected near the lower end of the lever arm, passes around an eccentrically mounted pulley and has its other end connected to weights. As the user lifts the lower portions of his legs, the lever arm is pivoted to pull the cable and the weights attached thereto, thereby strengthening the knee muscles of the user. The eccentrically mounted pulley varies the resistance to movement of the user's lower legs initially increasing the resistance and then decreasing the resistance in a sinusoidal manner as the lower legs are lifted to pivot the lever arm and lift the weights. |
| Date | |
| Source | US patent #4,256,302 |
| Author | Inventors: Dennis L. Keiser, Gideon B. Ariel |
| Permission (Reusing this file) |
This drawing was included in the application for US patent #4,256,302[1] with a priority date of March 10, 1976. It had no copyright notice and is therefore public domain. |
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This work is in the public domain in the United States because it was published in the United States between 1929 and 1977, inclusive, without a copyright notice. For further explanation, see Commons:Hirtle chart as well as a detailed definition of "publication" for public art. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.
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Original upload log edit
The original description page was here. All following user names refer to en.wikipedia.
| Date/Time | Dimensions | User | Comment |
|---|---|---|---|
| 2016-12-01 16:17:45 | 1255 × 1940 | Hroth69 | An improved exercising device for exercising the legs of a user includes a frame member with a lever arm having one end pivotably attached thereto. The lever arm extends downwardly from the portion of the frame member to which it is pivotably connected... |
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| current | 05:13, 26 September 2018 | | 1,255 × 1,940 (60 KB) | FSock (talk | contribs) | Transferred from en.wikipedia (MTC!) (1.1.1) |
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