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Expired
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SYMPHONIONFABRIK AG
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SYMPHONIONFABRIK AG
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Publication of GB190815473ApublicationCriticalpatent/GB190815473A/en
15,473. Symphonionfabrik Akt.-Ges. June 13, [date applied for under Section 91 of Patents &c. Act, 1907]. [Patent of Addition to No. 15,426, A.D. 1908]. Phonographs; gramophones.-Relates to an improvement on Specification No. 15,426, A.D. 1908, in which the securing set-screw of the gramophone needle is provided with a sapphire point and is adapted to be used for reproducing record disks having the Edison hill-and-dale sound track, and consists in providing a slot 4 in the tone-arm, and two slots in a disk 5 supporting the sound-box, so that when the latter is rotated through 90 degrees, the sapphire-pointed setscrew can be adjusted to occupy the same position as that previously occupied by the gramophone needle.
GB190815473D1908-06-061908-07-21Improvements in or relating to Sound Boxes of Gramophones and like Machines.
ExpiredGB190815473A
(en)