File:Rice Kellogg loudspeaker 2.jpg
![File:Rice Kellogg loudspeaker 2.jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/9/91/Rice_Kellogg_loudspeaker_2.jpg/800px-Rice_Kellogg_loudspeaker_2.jpg?20210503170850)
Size of this preview: 800 × 510 pixels. Other resolutions: 320 × 204 pixels | 640 × 408 pixels.
Original file (941 × 600 pixels, file size: 289 KB, MIME type: image/jpeg)
File information
Structured data
Captions
Captions
Add a one-line explanation of what this file represents
Summary
editDescriptionRice Kellogg loudspeaker 2.jpg |
English: One of the first moving coil cone loudspeakers, developed by Chester W. Rice and Edward W. Kellogg at General Electric Laboratory in Schenectady, New York in 1925. It is the prototype for almost all modern loudspeakers. This may have been a commercial version sold with the RCA Radiola receiver. It consists of a paper cone attached at the rim to the baffle plate with a very flexible compliant coupling, attached to a light coil of wire (voice coil) in the field of an electromagnet. |
Date | |
Source | Retrieved January 5, 2015 from http://www.thescreamingend.com/PHONOLAND/rice-kellogg.html Credited to Rice, Chester W.; Kellogg, Edward W. "Notes on the development of a new type of hornless loud speaker" in Journal of the American Institute of Electrical Engineers, A.I.E.E, New York, Vol. 44, No. 9, September 1925, p. 982-991, DOI:10.1109/JAIEE.1925.6534260 |
Author | Chester W. Rice, Edward W. Kellogg |
Permission (Reusing this file) |
This 1925 issue of Journal of the American Institute of Electrical Engineers magazine would have the copyright renewed in 1953. Online page scans of the Catalog of Copyright Entries, published by the US Copyright Office can be found here. Search of the Renewals for Periodicals for 1952, 1953, and 1954 show no renewal entries for Journal of the American Institute of Electrical Engineers. Therefore the magazine's copyright was not renewed and it is in the public domain. |
Licensing
editPublic domainPublic domainfalsefalse |
![]() |
This work is in the public domain because it was published in the United States between 1929 and 1963, and although there may or may not have been a copyright notice, the copyright was not renewed. For further explanation, see Commons:Hirtle chart and the copyright renewal logs.
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 (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties. العربية ∙ Deutsch ∙ English ∙ español ∙ français ∙ galego ∙ italiano ∙ 日本語 ∙ 한국어 ∙ македонски ∙ português ∙ português do Brasil ∙ русский ∙ sicilianu ∙ slovenščina ∙ українська ∙ 简体中文 ∙ 繁體中文 ∙ +/− |
![]() |
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 17:08, 3 May 2021 | ![]() | 941 × 600 (289 KB) | Materialscientist (talk | contribs) | FFT, rotation |
10:53, 5 January 2015 | ![]() | 941 × 600 (168 KB) | Chetvorno (talk | contribs) | User created page with UploadWizard |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
File usage on other wikis
The following other wikis use this file:
- Usage on ca.wikipedia.org
- Usage on en.wikipedia.org
- Usage on es.wikipedia.org
- Usage on fr.wikipedia.org
- Usage on he.wikipedia.org
- Usage on it.wikipedia.org
- Usage on nl.wikipedia.org