GB190728759A - Improvements in Sound Records. - Google Patents
Improvements in Sound Records.Info
- Publication number
- GB190728759A GB190728759A GB1901190728759A GB190728759DA GB190728759A GB 190728759 A GB190728759 A GB 190728759A GB 1901190728759 A GB1901190728759 A GB 1901190728759A GB 190728759D A GB190728759D A GB 190728759DA GB 190728759 A GB190728759 A GB 190728759A
- Authority
- GB
- United Kingdom
- Prior art keywords
- kilograms
- added
- asphalt
- melted
- driven
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
28,759. Edison, T. A. Jan. 3, [date applied for under Patents Act, 1901]. Drawings to Specification. Bituminous, resinous, and fatty plastic compositions. -Record-cylinders for phonographs are formed of a mixture of asphalt, lead stearate, and preferably a resin gum made as follows : 180 kilograms of commercial stearic acid, having about 5 per cent oleic acid and free from uncombined fats and glycerine, is added to 90 kilograms of resin gum, such as copal, kauri, or colophony, and melted at temperatures ranging from 121-205‹ C. When melted, 45 kilograms of litharge are added, forming lead stearate and water, the water being driven off as steam. Hard asphalt, such as gilsonite or Egyptian or Syrian asphalt, is then added in varying quantities, and a temperature of 205‹ C. is maintained until all the products of decomposition are driven off and the material is limpid. The composition is next filtered through layers of muslin, and is then ready for use. Specifications No. 20,767, A.D. 1899, No. 19,903, A.D. 1905, and No. 10,989, A.D. 1907, [Abridgment Class Electric telegraphs &c.], are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US190728759XA | 1907-01-03 | 1907-01-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB190728759A true GB190728759A (en) | 1908-07-23 |
Family
ID=32231407
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1901190728759A Expired GB190728759A (en) | 1907-01-03 | 1907-12-31 | Improvements in Sound Records. |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB190728759A (en) |
-
1907
- 1907-12-31 GB GB1901190728759A patent/GB190728759A/en not_active Expired
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