Hi
It was totally a mechanical device, no electronics or electricity in any
form. No volume control at all.
This too is off - topic really and lets close it.
Harish Kotian.
---- Original Message -----
From: "Syed Imran" <syed.f...@gmail.com>
To: <jaisonay...@gmail.com>; <accessindia@accessindia.org.in>
Sent: Wednesday, October 17, 2012 7:52 PM
Subject: Re: [AI] A glympse into the working of a Gramophone
So the wind-up gramophone did not need electricity? Did it have a volume
control attached to it?
-----Original Message-----
From: AccessIndia [mailto:accessindia-boun...@accessindia.org.in] On
Behalf
Of Jaison Bellarmine
Sent: 17 October 2012 15:27
To: accessindia@accessindia.org.in
Subject: Re: [AI] A glympse into the working of a Gramophone
There was one gramaphone at HKCMM School for the Blind Karimpuzha in
Kerala
which worked with the force of an woun spring. When the spring is
tightened
the disc will start to revolve on its tray. A stylus which works as the
track reader is set in such a way that it moves in the track of the disc.
In
the tracks, there is hights and low places in an anologue style as per the
recorded sound. So the stylus moves back and forth as the disc
revolves.the
other end of the stylus is attached to a magnet which moves in a solinoid.
Since the stylus moves acording to the recorded audio frequency an audio
frequency signal is generated in the solinoid. This signal is coupled to a
tiny speaker which serves as the driver of a cone loudspeaker. The
specially
designed cone loudspeaker, through its impedence matching, gives
sufficient
volume to the audio output.
Even in this digital era, this invention is a real miracle. When I saw the
gramaphone for the last time, it could play only for one and a half minute
because of its weak spring. Experts were not available to repair it.
With regards,
Jaison Bellarmine-----Original message-----
From: Syed Imran
Sent: 07/10/2012, 12:31 pm
To: accessindia@accessindia.org.in
Subject: Re: [AI] A glympse into the working of a Gramophone
Sorry folks. Just a correction - The inventor of the gramophone is Emile
Berliner <http://en.wikipedia.org/wiki/Emile_Berliner>
Thanks
From: Syed Imran [mailto:syed.f...@gmail.com]
Sent: 07 October 2012 12:02
To: 'accessindia@accessindia.org.in'
Subject: A glympse into the working of a Gramophone
Hi all
A gramophone is An antique record player; the sound of the vibrating
needle
is amplified acoustically. It is the first machine to reproduce a recorded
sound with clarity. Has anyone come across a wind-up gramophone which
required no power? If so, please give its physical description.
This is invented by none other than one of the greatest inventor Thomas
Alva
Edison. His other inventions included the incandescent electric light and
the microphone and the Kinetoscope (1847-1931).
In case you are curious to hear a sample sound of how a gramophone worked
those days, here's the link to the Advertising Record of phonographs,
recorded by Len Spencer circa 1906.
http://upload.wikimedia.org/wikipedia/commons/7/76/Advertising_Record.ogg
The recording begins, "I am the Edison phonograph .", and explains the
novel
benefits of the phonograph from the first person perspective of the
machine.
A very early landmark of advertising in modern media, this was played
widely
in shops to entice customers.
It is an Ogg Vorbis sound file, length 2m 23s, whose bit rate is 81kbps.
Thanks
Syed
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