Henry Albert Seymour gramophone patents
Posted: Thu Mar 07, 2013 7:49 am
Available for free download from Espacenet.
Click on "original document" on the left, then click on "download" at the top. Diagrams are on the last page.
GB19431 (1904)
"An Improved Recording Instrument in connection with Phonographs, Graphophones and similar Machines for Registering Sounds."
http://worldwide.espacenet.com/publicat ... &KC=A&ND=4
- a modification to a phonograph recorder where the weight of the diaphragm etc is mostly born by a wheel riding on the cylinder's surface near the stylus, allowing the diaphragm to be of the correct weight and stiffness for optimal sound reproduction, rather than the higher stiffness required by the weight of the system.
GB19856 (1904)
"A Pneumatic Diaphragm for Recording and Reproducing Sound in connection with Phonographs, Graphophones, and similar Machines."
http://worldwide.espacenet.com/publicat ... &KC=A&ND=4
- a sound box / reproducer / recorder where instead of having one diaphragm, two separate glass diaphragms are used, in parallel, separated by washers.
GB103904 (1917)
"An Adjustable Fibre Needle Holder for Gramophone Sound-boxes."
http://worldwide.espacenet.com/publicat ... &KC=A&ND=5
- a neat little adapter to allow fibre needles to be used with sound boxes that only have a small circular hole for steel needles.
GB107262 (1917)
"Improvements in the Construction of Gramophones and Phonographs."
http://worldwide.espacenet.com/publicat ... &KC=A&ND=5
- a way of mounting the tone arm which allows an external horn gramophone to be fitted with a lid.
(the patent office's copy is a really lousy scan, especially of page one)
Hope these are of interest. If anyone else is thinking of searching out old patents, this page is very useful...
http://www.bl.uk/reshelp/findhelpsubjec ... ching.html
Cheers,
David.
Click on "original document" on the left, then click on "download" at the top. Diagrams are on the last page.
GB19431 (1904)
"An Improved Recording Instrument in connection with Phonographs, Graphophones and similar Machines for Registering Sounds."
http://worldwide.espacenet.com/publicat ... &KC=A&ND=4
- a modification to a phonograph recorder where the weight of the diaphragm etc is mostly born by a wheel riding on the cylinder's surface near the stylus, allowing the diaphragm to be of the correct weight and stiffness for optimal sound reproduction, rather than the higher stiffness required by the weight of the system.
GB19856 (1904)
"A Pneumatic Diaphragm for Recording and Reproducing Sound in connection with Phonographs, Graphophones, and similar Machines."
http://worldwide.espacenet.com/publicat ... &KC=A&ND=4
- a sound box / reproducer / recorder where instead of having one diaphragm, two separate glass diaphragms are used, in parallel, separated by washers.
GB103904 (1917)
"An Adjustable Fibre Needle Holder for Gramophone Sound-boxes."
http://worldwide.espacenet.com/publicat ... &KC=A&ND=5
- a neat little adapter to allow fibre needles to be used with sound boxes that only have a small circular hole for steel needles.
GB107262 (1917)
"Improvements in the Construction of Gramophones and Phonographs."
http://worldwide.espacenet.com/publicat ... &KC=A&ND=5
- a way of mounting the tone arm which allows an external horn gramophone to be fitted with a lid.
(the patent office's copy is a really lousy scan, especially of page one)
Hope these are of interest. If anyone else is thinking of searching out old patents, this page is very useful...
http://www.bl.uk/reshelp/findhelpsubjec ... ching.html
Cheers,
David.