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I believe the original question was not whether Blumlein invented stereo, but whether he invented 45/45 disc cutting. Related to that, did he invent the pure coincident stereo microphone technique using a pair of crossed figure-8s. I believe the answer to both is yes. But, if Jones invented either of these, specifically, I'd be interested to know.

Gary



-----Original Message-----
From: Association for Recorded Sound Discussion List [mailto:[log in to unmask]] On Behalf Of George Brock-Nannestad
Sent: Friday, February 10, 2017 5:08 PM
To: [log in to unmask]
Subject: Re: [ARSCLIST] Alan Dower Blumlein invented the stereo sound - finally awarded Grammy

From: Patent Tactics, George Brock-Nannestad


Hello,

I rarely post these days, but seeing history distorted again, again, again provokes me.

It is incredible that even with so many facts now available online people still do not get the stereodisc story right. And, concerning stereo sound to movies, the same errors apply.

The earliest patented solution of stereo sound on film was by W. Bartlett Jones of Chicago, whose USP 1,944,182 was filed 18 November 1930 and patented 23 Jan
1934

He was the pioneer in stereophony, years ahead of Blumlein, Maxfield, Harrison, and Keller.

Jones' first work in stereophony was put officially to paper in 1927 and published in several other patents. It is difficult to see that Western Electric could have avoided taking licenses if they wanted to commercialise Maxfield's or Keller's contributions. We have not heard about that.

Keller and Rafuse USP2, 114,471 filed their application on the individual recording of each groove flank on 20 June 1936.

The whole business of examining the various patent applications has been a shambles, and nobody has investigated them properly. W. Bartlett Jones has only ever been mentioned by me, but I am not going to finish the job.

Getting killed in the war during important defense work is obviously a much better selling point!

Best wishes,


George




> About time! But I thought Blumlein invented the 45/45 method (later 
> claimed by RCA<https://www.youtube.com/watch?v=kxelxqtkkdc>), not stereo recording:
> 
> 
> 
> http://www.aes.org/aeshc/docs/recording.technology.history/stereo.html
> 
> 
> 
> M
> 
> 
> 
> Marcos Sueiro Bal
> 
> Senior Archivist, New York Public Radio
> 
> 646 829 4063
> 
> 
> 
> -----Original Message-----
> From: Association for Recorded Sound Discussion List 
> [mailto:[log in to unmask]] On Behalf Of CJB
> Sent: Friday, February 10, 2017 7:53 AM
> To: [log in to unmask]
> Subject: [ARSCLIST] Alan Dower Blumlein invented the stereo sound - 
> finally awarded Grammy
> 
> 
> 
> Grammy for a British genius: Inventor of stereo sound that changed 
> music and film forever is honoured 75 YEARS after he was killed 
> working on top-secret WWII radar
> 
> 
> 
> http://www.dailymail.co.uk/news/article-4209900/A-Grammy-British-geniu
> s-change
> d-music-ever.html
> 
> 
> 
> CJB.