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 Post subject: Henry Seymour Catalogue
PostPosted: Sat Nov 17, 2018 10:39 am 
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Victor V
His epigrams are all his own, the man's an epigramophone!
Joined: Mon Oct 24, 2011 1:21 pm
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Location: The Somerset Levels, UK.
Henry Albert Seymour (1861-1938) was the leading British pioneer in the field of improvements to sound reproduction.
His book "The Reproduction of Sound", published in 1917, was the definitive work on the subject at the time.

In 1923 Ellis Michael Ginn and his brother-in-law David Phillips set out to create the perfect gramophone, and it was to Henry Seymour that they turned for guidance. The Seymour Superphone was their inspiration, and their early EMG machines made extensive use of Seymour's components.

I recently acquired a copy of Henry Seymour's catalogue, which I reproduce here to share with you :


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 Post subject: Re: Henry Seymour Catalogue
PostPosted: Sat Nov 17, 2018 11:47 am 
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Victor IV
Joined: Sat Jul 09, 2016 7:12 pm
Posts: 1319
Many thanks for posting this. I see that the Seymour Loud-Speaker horn ...
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... anticipates Columbia's Plano-Reflex design ...
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...by several years!

OrthoFan


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 Post subject: Re: Henry Seymour Catalogue
PostPosted: Sat Nov 17, 2018 2:46 pm 
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Victor III
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Posts: 559
Location: Hampshire, England.
Many thanks Roger---extremely interesting and here are some photos of one of his Superphones.


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 Post subject: Re: Henry Seymour Catalogue
PostPosted: Sat Nov 17, 2018 2:49 pm 
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Victor III
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Joined: Mon Jul 02, 2012 9:57 am
Posts: 559
Location: Hampshire, England.
....and a soundbox box.......


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 Post subject: Re: Henry Seymour Catalogue
PostPosted: Sun Nov 18, 2018 12:55 am 
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Victor V
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Location: Where there's "hamburger ALL OVER the highway"...
It would be interesting to make a video comparison of the "Superphone" against other machines of the period; depending on how the "Hornite" diaphragm has aged versus mica diaphragms.

Bill


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 Post subject: Re: Henry Seymour Catalogue
PostPosted: Fri Nov 23, 2018 4:06 pm 
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Victor Jr
Joined: Sat Oct 13, 2018 7:59 am
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Yes, it is impossible to assess synthetic diaphragms like the Hornite and the Cliftophone, because we just don't know how they have deteriorated with age.
The Seymour loudspeaker does not anticipate the Columbia Plano-Reflex, because it does not have flats on the outside of the bends. It is simply made up of sections of tapered tube joined at angles, like the Waveola horn.


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 Post subject: Re: Henry Seymour Catalogue
PostPosted: Sat Nov 24, 2018 11:54 am 
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Victor IV
Joined: Sat Jul 09, 2016 7:12 pm
Posts: 1319
Oedipus wrote:
...The Seymour loudspeaker does not anticipate the Columbia Plano-Reflex, because it does not have flats on the outside of the bends. It is simply made up of sections of tapered tube joined at angles, like the Waveola horn.


Many thanks for the clarification. I enlarged the image of the loudspeaker horn and can (now) see what you mean.

OrthoFan


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