Vaizdas:Wax cylinder in Dictaphone.jpg
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Wax_cylinder_in_Dictaphone.jpg (789 × 453 taškų, rinkmenos dydis: 103 KiB, MIME tipas: image/jpeg)
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Aprašymas
| Aprašymas | Photo of wax cylinder recording medium in Dictaphone dictating machine from the 1920s. The recording head at right moves from left to right. To play it back, 'stethoscope' type earphones are plugged into the hole in the recording head. The dark bands are shiny gaps between recordings, made by moving the needle forward before each dictation, enabling the typist to find the specific track needed. Each wax cylinder can record 1200-1500 words, and can be reused 100-120 times by putting it in an erasing machine that 'shaves' off the surface. |
| Data | |
| Šaltinis | Downloaded on 2008-1-12 from Clarence Charles Smith (1922) The Expert Typist, MacMillan Co., New York, USA, p.125, fig.40 on Google Books. The photo is credited (p.122) to the Columbia Phonograph Co. |
| Autorius | Colombia Phonograph Co. |
| Leidimas (Šios rinkmenos panaudojimas kitur) |
Public domain - published in USA before 1923. |
Licencija
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This media file is in the public domain in the United States. This applies to U.S. works where the copyright has expired, often because its first publication occurred prior to January 1, 1929, and if not then due to lack of notice or renewal. See this page for further explanation.
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This image might not be in the public domain outside of the United States; this especially applies in the countries and areas that do not apply the rule of the shorter term for US works, such as Canada, Mainland China (not Hong Kong or Macao), Germany, Mexico, and Switzerland. The creator and year of publication are essential information and must be provided. See Wikipedia:Public domain and Wikipedia:Copyrights for more details.
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| Data/Laikas | Miniatiūra | Matmenys | Naudotojas | Paaiškinimas | |
|---|---|---|---|---|---|
| dabartinis | 16:06, 12 sausio 2008 | | 789 × 453 (103 KiB) | Chetvorno | {{Information |Description=Photo of wax cylinder recording medium in Dictaphone dictating machine from 1920s. The dark bands are shiny gaps between recordings, enabling typist to find specific dictation needed. Each wax cylinder can record 1200-1500 wor |
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