Elevator – industrial lift truck – or stationary lift for vehicle – Stationary lift for roadway vehicle or required component... – Having specific drive means for support
Patent
1985-12-03
1988-01-19
Shoop, Jr., William M.
Elevator, industrial lift truck, or stationary lift for vehicle
Stationary lift for roadway vehicle or required component...
Having specific drive means for support
B66B 118
Patent
active
047199962
ABSTRACT:
A group supervision apparatus for an elevator has apparatus operating under program control to predict periods of time of service by respective cages and to calculate predicted service periods of time, to calculate a mean value and a variance of the predicted service periods of time as to each of the cages, to set a reference value for deciding whether the service periods of time are long or short, to obtain a square value of a difference between the reference value and the mean value, to calculate a value of a ratio between the variance and the square value and to calculate an assignment estimation value on the basis of the value of the ratio in conformity with a predetermined assignment estimation function which becomes a monotonically increasing function of the ratio, to preferentially select a cage as to which the assignment estimation value is smaller, and to assign the selected cage to a hall call.
REFERENCES:
patent: 4030571 (1977-06-01), Kaneko et al.
patent: 4244450 (1981-01-01), Umeda et al.
patent: 4411337 (1983-10-01), Schroder et al.
Blum Richard
Mitsubishi Denki & Kabushiki Kaisha
Shoop Jr. William M.
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