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Summary
| Description | . Was used in the Model F and was the base of the Model M "membrane buckling spring switch". |
| Date | |
| Source | U.S. Patent 4,118,611 / File:IBM buckling spring.svg |
| Author | Richard Hunter Harris |
Licensing
 | The text and illustrations of US patents published before March 1, 1989 are in the public domain unless the patent text contains a specific notice that portions are copyrighted. See 37 CFR 1.71(d), 37 CFR 1.84(s) The original patent contains no such notice, so its contents are in the public domain. Note: This only applies to images published before March 1, 1989. Patents published after that date are most likely copyrighted, unless in the public domain for another reason, such as {{PD-ineligible}}. |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 15:25, 31 December 2013 | | 360 × 381 (25 KB) | Shaddim | User created page with UploadWizard |
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