From: Patent Tactics, George Brock-Nannestad
Hello,
Allen Amet quoted and commented:
>
> In a message dated 9/22/2009 10:56:32 A.M. Eastern Daylight Time,
> [log in to unmask] writes:
>
> Can anyone cite a reference for the inner taper ratio of a standard
> Edison cylinder? The info here
> http://www.poppyrecords.co.uk/tec001/tec01.htm
> states 3/8" per foot, or 1:32. Was this specified by Edison anywhere?
> Does anyone have any other figures?
>
>
> ----------------
> This sounds too high. see US pat 382,418.
----- this is a patent on the principle and as far as I can see, gives no
dimensions.
Kind regards,
George
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