Apparatus for the automatic counting of passengers

Details Apparatus for the automatic counting of passengers Apparatus for the automatic counting of passengers

1975-09-19

1977-02-22

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

340258B, G01D 2104

Patent

active

040093891

ABSTRACT:
There is provided apparatus for determining the number of passengers entering and/or leaving a collective passenger vehicle. The apparatus comprises means for projecting a pair of light-beams of invisible light across the passageway of said passengers and means for receiving said light-beams. Detecting means which operate in conjunction with the light-beam receiving means are adapted to detect the energized or unenergized state of the receiving means and in response thereto to feed information to a data registering or recording means, said information being indicative of the number of passengers passing through the light-beams.

REFERENCES:
patent: 2037190 (1936-04-01), Backer
patent: 2047665 (1936-07-01), Beggs
patent: 2065048 (1936-12-01), Burnside
patent: 2082941 (1937-06-01), Burnside
patent: 3207266 (1965-09-01), Hornung
patent: 3764813 (1973-10-01), Clement et al.
patent: 3842257 (1974-10-01), Kohler
patent: 3932746 (1976-01-01), Swanson

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