[BITList] tapered?

[FS]

  ct
  think they would have had to have had a leading taper on the first 
drill pipes to help with mating the pipes and this would have lead to 
the natural progression of the use of the tapered thread lets face it 
the early americans were pretty innovative rather like the ozzy cockies
frank

On 7/13/2010 3:46 PM, CT's wrote:
> frank
> I too seem to remember through the mist of time that they were tapered 
> threads.
> however, checking google I see they are not now tapered here!
> I doubt if people here concerned with drill pipe looked to the chimney 
> sweeps tool box for inspiration and decided on tapered threads!
> ct
>
> *From:* FS <mailto:franka at iinet.net.au>
> *Sent:* Tuesday, July 13, 2010 2:32 AM
> *To:* BitList <mailto:bitlist at lists.bcn.mythic-beasts.com>
> *Subject:* Re: [BITList] down the hole
>
> ct
>   don't know if the tapered tread was ever patented, did they not have 
> it on the old chimney sweep brushes?
> frank
>
>
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