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 Post subject: tangential tonearm
PostPosted: Wed Nov 01, 2017 2:04 pm 
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Victor II
Joined: Sat Apr 13, 2013 3:11 pm
Posts: 217
Location: Spain
There aren't a lot of tangential tonearm models out there / I'm intrigued by this one, how does the arm move, is it simply moved by the record grooves? That would cause a lot of wear on the records no? And why the two options of horns? Interesting machine!

Any ideas? It's up for auction in i bit.


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 Post subject: Re: tangential tonearm
PostPosted: Wed Nov 01, 2017 2:08 pm 
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Victor V
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Joined: Thu Aug 19, 2010 9:36 am
Posts: 2197
Location: Delaware
That is cool, even converts from internal to external horn. Very interesting. If you decide to get it, please make it a featured phonograph.

Andreas


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 Post subject: Re: tangential tonearm
PostPosted: Wed Nov 01, 2017 5:12 pm 
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Victor II
Joined: Sat Apr 13, 2013 3:11 pm
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Location: Spain
I won't be able to get this one... if anyone is interested below a link to the auction house.

The only other tangiental tone arm I've seen is that experimental model of the Lumiere 460 with a built in radio, it has the smartest tangiental system I've seen so far. There's a youtube video of it playing, too bad they never produced it in numbers, what a machine!

https://www.invaluable.com/auction-lot/ ... d8b4f6fb3b


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 Post subject: Re: tangential tonearm
PostPosted: Wed Nov 01, 2017 10:02 pm 
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Victor IV
Joined: Sat Jul 09, 2016 7:12 pm
Posts: 1121
I'm wondering if that detachable horn might have been for making home recordings, considering all those levers, etc. and what looks to be a feed-screw.

I know that there were a few acoustic disc recorders produced during this era such as the "Pathepost" and the "Acoustograph" -- https://www.youtube.com/watch?v=uUR8NnYmIbI

Others are mentioned here: https://www.lathetrolls.com/viewtopic.php?f=5&t=333


OrthoFan


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 Post subject: Re: tangential tonearm
PostPosted: Tue Nov 07, 2017 6:07 am 
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Victor III
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F. Depero, "Grammofono", 1923.
Joined: Thu Feb 24, 2011 4:19 am
Posts: 559
Location: Italy
I am also of the opinion that this machine is not intended to play back industrial records, but to record and playback its own specific records.

Quite obviously, as you have already devised, a generic record that doesn't have the same exact thread of the arm's feedscrew would be severely damaged.


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 Post subject: Re: tangential tonearm
PostPosted: Tue Nov 07, 2017 8:01 am 
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Victor III
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Location: near Utopia, UK
I don't think there is a feed screw, just guide rails to maintain parallelism. Unless I'm missing something? Can anyone see a drive system from the motor?


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 Post subject: Re: tangential tonearm
PostPosted: Tue Nov 07, 2017 8:27 am 
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Victor III
Joined: Sun Mar 15, 2009 6:18 am
Posts: 671
I would not call it an arm, but I have a Pathé diffusor (the one with a paper cone and the needle in its center) in which the cone moves tangentially. It is attached to a rod that allows it to move linearly, pushed by the disc grooves.

I also remember seeing a you tube video of an English portable with a system similar to the one shown above, with a telescopic arm that stretches and contracts.


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 Post subject: Re: tangential tonearm
PostPosted: Tue Nov 07, 2017 9:19 am 
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Victor VI
I have good days...this might not be one of them
Joined: Wed Jan 07, 2009 5:23 pm
Posts: 3581
Location: Albany NY
CarlosV wrote:
I would not call it an arm, but I have a Pathé diffusor (the one with a paper cone and the needle in its center) in which the cone moves tangentially. It is attached to a rod that allows it to move linearly, pushed by the disc grooves.

I also remember seeing a you tube video of an English portable with a system similar to the one shown above, with a telescopic arm that stretches and contracts.


The so-called "Fixed Tone Arm" gramophone - it was a rubber tube that slid in and out of a metal tube. Ridiculous gimmick: https://www.youtube.com/watch?v=-bNH_UU6-Q4


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 Post subject: Re: tangential tonearm
PostPosted: Tue Nov 07, 2017 11:48 am 
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Victor IV
Joined: Mon Aug 24, 2009 3:08 pm
Posts: 1566
Location: Harrison Township, MI
Orchorsol wrote:
I don't think there is a feed screw, just guide rails to maintain parallelism. Unless I'm missing something? Can anyone see a drive system from the motor?



I agree with you. I see neither a feed screw, nor a means to drive one.


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 Post subject: Re: tangential tonearm
PostPosted: Tue Nov 07, 2017 11:56 am 
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Victor II
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Joined: Mon Jul 02, 2012 9:57 am
Posts: 494
Location: Hampshire, England.
snallast wrote:


The only other tangiental tone arm I've seen is that experimental model of the Lumiere 460 with a built in radio, it has the smartest tangiental system I've seen so far. There's a youtube video of it playing, too bad they never produced it in numbers, what a machine!



Here is that clever machine in action : https://www.youtube.com/watch?v=qASnGZzwbZM

The one under review seems to be a little questionable in design although the full details are rather indistinct from the photos. As Orchorsol says, there does not appear to be a feed screw. Similarly, the HMV/Lumière relies on the record grooves alone for progressive linear motion. The Ecuator appears to have a trip working an auto-stop but quite what the inverted hook on the front of the tonearm rest (if it is indeed such) is for is anyone's guess. Sound quality is unlikely to be very good as it must be nearly impossible to keep the tonearm airtight whilst still allowing unrestricted concertina motion. The seals for the guide rod passing through the tonearm would also further impair performance.

It is always fascinating to see lateral thinking and this must be an extremely rare item.


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