File:Reedswitch.PNG
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Original file (1,580 × 1,540 pixels, file size: 238 KB, MIME type: image/png)
Summary
| Description |
English: The reed switch is a device that is composed of aligned, flat cantilevered ferrous metal reeds spaced apart and placed one on top of another, surrounded by dry inert gas or a vacuum inside a hermetically sealed glass envelope and, between the overlapping members, there is a small air gap. Image cleaned up, rotated and condensed from patent drawing found in U.S. Patent 2,264,746, granted 2 December 1941. The drawing depicts a single-pole double throw (SPDT) switch with three terminals passing through the glass envelope. Descriptions from the patent text are as follows:
Fig. 1 - device shown in nonoperated position 1 - glass envelope |
| Date | |
| Source | Walter B. Ellwood, U.S. Patent 2,264,746, Electromagnetic switch |
| Author | United States Patent and Trademark Office |
Licensing
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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}}. |
File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 05:38, 10 March 2019 | | 1,580 × 1,540 (238 KB) | wikimediacommons>Hydrargyrum | Bigger; replaced incorrect embedded descriptions in favor of original patent drawing number keys and separate descriptions that can be translated into other languages on Wikimedia Commons. |
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