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How did elevator communication used to work?

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Uberloitenment | 14:54 Fri 15th Apr 2011 | Science
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I understand the power behind the older elevators (manual, steam, hydraulics etc) but I wondered how was it communicated to the power source what floor was required?

Any ideas?
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Avatar Image squarebear
Didn't there used to be a man standing in the lift who asked, "what floor Sir?"
14:55 Fri 15th Apr 2011
Avatar Image Uberloitenment
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Yes indeed there did but I don't think he was the power source
14:59 Fri 15th Apr 2011
Avatar Image scotman
This might give you a start although it does not really deal with older systems

http://science.howstu...uipment/elevator1.htm
15:03 Fri 15th Apr 2011
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