Alt-BEAM Archive
Message #02312
To: beam@corp.sgi.com
From: John Leo Zimmer jlz@novia.net
Date: Wed, 14 Apr 1999 08:17:17 -0500
Subject: [alt-beam] Re: OTU
Bumper314@aol.com wrote:
>How big (diameter) are OTUs? I have some that are a little smaller then 2".
Steve, where did you get these OTU's?
I have one gear train harvested from a washing machine timer that is 1.88"
(4.8mm) diameter by .3" (8mm) thick once I'd stripped all the extraneous
stuff off of it. (wt 25gm) It was labeled SINGER.
The gears are nylon and fairly heavy, and typical of washing machine timers
where they drive lots of little cams and switches. I've glued a CD ROM
motor to it and it's effective, but a bit clunky and noisy.
All the OTU's I have found are smaller... 1" diameter at the base and 3/4"
high. When stripped down to the meat, the gear train is only 8mm high.
These are very light (less than 8gm), quiet and beautifully matched to
pager motors. All these I have found are virtually identical... and they're
the ONLY timers I have found in an oven. They were made by TELECHRON and
are all stamped S1. Only one of the ten or so that I have dismantled was
made of brass inside (as shown at Solarbotic's web site). It weighs
considerably more, 12gm. All the rest are aluminum, which is important in
that you're not going to solder your pager motor to it.
TELECHRON made a range of electric clock motors. For more on Telechron a
great two page summary is found at: http://www.bhi.co.uk/hints/cn14.htm
Regards,
JohnLeo
born in '44 and maybe the oldest adolescent on this list.
not that I'd expect that to earn me any special perks. :-)
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