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Expired
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Henri Francois Rummel
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Individual
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Individual
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Publication of GB190820699ApublicationCriticalpatent/GB190820699A/en
20,699. Rummel, H. F. Oct. 2, 1907, [date applied for under Section 91 of Patents &c. Act, 1907]. Casting phonograph records. - Cylindrical phonograph records are cast by running molten wax from a vessel 3, placed within a larger vessel 1, through a pipe 4 having a tap 13 controlled by a wheel 14, and through a valve 6 having an opening 11 to correspond either with an inlet 8 or an outlet 7, and into a matrix or mould 12. When the wax has cooled to a sufficient thickness, the valve 6 is rotated to allow the spare wax to pass through an outlet pipe 10 into another vessel.
GB190820699D1907-10-021908-10-01Improvements in or relating to the Manufacture of Phonograph and like Cylinders
ExpiredGB190820699A
(en)