How did elevator communication used to work?

Uberloitenment | 13:54 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?

Astronomy again

Sulphuric Acid

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squarebear

Didn't there used to be a man standing in the lift who asked, "what floor Sir?"

Uberloitenment

Question Author

Yes indeed there did but I don't think he was the power source

scotman

This might give you a start although it does not really deal with older systems

http://science.howstu...uipment/elevator1.htm

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