File:Mu metal CRT shields.jpg
No higher resolution available.
Mu_metal_CRT_shields.jpg (325 × 328 pixels, file size: 25 KB, MIME type: image/jpeg)
 | This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
Summary
| Description |
English: Magnetic shields for cathode ray tubes (CRTs) made of mu metal for use in oscilloscopes, from an ad by James Millen Mfg. Co. in a 1945 electronics magazine. The electron beams used in cathode ray tubes to draw on the tube's screen could be deflected by magnetic fields from transformers and other electronic components in the oscilloscope's insides. So the sides of the long CRT tube were surrounded by a shield made of mu metal. Mu metal is a high permeability nickel-iron alloy which could shield against magnetic fields by conducting the magnetic field lines around the shielded space. |
| Date | |
| Source | Retrieved June 12, 2014 from Radio News magazine, Ziff-Davis Publishing Co., New York, Vol. 33, No. 3, March 1945, p. 12 on American Radio History site |
| Author | Unknown author |
| Permission (Reusing this file) |
This image is from an advertisement for James Millen Mfg. Co. without a copyright notice published in a 1945 magazine. In the United States, advertisements published in collective works (magazines and newspapers) are not covered by the copyright notice for the entire collective work. (See U.S. Copyright Office Circular 3, "Copyright Notice", page 3, "Contributions to Collective Works".) Since the advertisement was published before 1978 without a copyright notice, it falls into the public domain. |
Licensing
|
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.
|
 |
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 06:44, 14 June 2014 | | 325 × 328 (25 KB) | Chetvorno | User created page with UploadWizard |
File usage
The following 2 pages use this file:
Global file usage
The following other wikis use this file:
- Usage on fa.wikipedia.org
