Subject:
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Re: Variations on the "ADDER SUBTRACTOR" ("differtrans" ?)
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Newsgroups:
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lugnet.robotics
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Date:
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Thu, 28 Jan 1999 04:14:12 GMT
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Original-From:
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Peter Hesketh <pbh@phesk.demon.co.SPAMCAKEuk>
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Viewed:
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1008 times
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In article <36AFD272.E2ED9872@lynx.bc.ca>, Mark Tarrabain
<markt@lynx.bc.ca> writes
> Who originally came up with this device? (I mean in the real
> world, not necessarily just doing it with LEGO).
The differential goes back to the origins of the motor car at least.
The use as an adder/subtractor goes back to WW2 or earlier: there was a
marvellous suitcase sized mechanical analogue computer which was used to
calculate bomb aiming. Aircraft speed, wind speed and direction could
be dialled in. It contained lots of lovely gears, a couple of DC motors
and a suction-driven gyro with a mechanical shaft position-follower
output which did not load the gyro. I wish I hadn't pulled mine to
pieces, now.
--
Regards - Peter Hesketh, Mynyddbach, Mon.
Forty reasons why a dog is better than a woman: number 21
"When a dog gets old and starts to snap at you incessantly, you can
shoot it."
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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