0 TIS A V IS UA L TI M E LI NE
`
`1975-1999 2000-Present
`
`1950
`' I
`.._..._..___ __ __,
`Esca ator A Common A Polite RcvcrS.ll
`Term
`
`1952
`A First in Ho land
`
`1953
`Waygood-Ol s 1n
`Sydney
`
`1967
`Worklrg M.lgic 'W th
`Metals
`
`--�<1.---------------------------------------
`
`A Polite Reversal
`Elevators could travel unattended with the invention of the Otis
`Autotronic elevators in 1948. An advertisement in the 1950s highlights
`
`an additional feature: the electronic elevator door. When a person is
`
`detected, says the ad, the doors "politely reverse" before touching the
`passenger.
`
`Pictured above:
`A 1950s advertisement
`touts ''politely reversing"
`doors.
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