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Summary
| Description |
English: An illustration from US patent 4,118,611 "Buckling Spring Torsional Snap Actuator". Was used in the Model F and was the base of the Model M "membrane buckling spring switch". |
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| Date | |||
| Source | US Patent n° 4,118,611 | ||
| Author | Richard Harris | ||
| Permission (Reusing this file) |
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Licensing
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This work is in the public domain because it was published in the United States between 1978 and March 1, 1989 without a copyright notice, and its copyright was not subsequently registered with the U.S. Copyright Office within 5 years. Unless its author has been dead for several years, it is copyrighted in the countries or areas that do not apply the rule of the shorter term for US works, such as Canada (50 pma), Mainland China (50 pma, not Hong Kong or Macau), Germany (70 pma), Mexico (100 pma), Switzerland (70 pma), and other countries with individual treaties. See this page for further explanation.
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 23:13, 29 August 2006 | | 790 × 826 (28 KB) | GreyCat | An illustration from US patent 4,118,611 "Buckling Spring Torsional Snap Actuator". Source: US patent office scan {{PD-US-patent}} |
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