GB190728759A - Improvements in Sound Records. - Google Patents

Improvements in Sound Records.

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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
Application number
GB1901190728759A
Inventor
Thomas Alva Edison
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of GB190728759A publication Critical patent/GB190728759A/en
Expired legal-status Critical Current

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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.
GB1901190728759A 1907-01-03 1907-12-31 Improvements in Sound Records. Expired GB190728759A (en)

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)

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