Lift control system
First Claim
1. In a lift system including a cage for carrying passengers up and down in a shaft and a mechanically-driven door at each floor the cage is to stop to allow ingress and egress of passengers, a control system for at least controlling operation of the mechanical door in response to passengers desiring to load on the lift, said control system comprising:
- a spatial filter inside the cage of the lift, said spatial filter including a fence reticle with the reticle stripes oriented in a parallel relationship to the movement of the mechanical door;
discriminating means for discriminating between signals below and above a predetermined level as received from said spatial filter, and for producing a control signal when the signals are above the predetermined level; and
active means connected to said discriminating means for controlling closure of said door.
1 Assignment
0 Petitions
Accused Products
Abstract
A lift control system includes a spatial filter producing a signal having various features, a discriminator for discriminating one or more features of the signal, and for producing a control signal when at least one of the features discriminated falls in a predetermined range, and active devices connected to the discriminator. The active devices are made active upon receipt of the control signal.
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Citations
12 Claims
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1. In a lift system including a cage for carrying passengers up and down in a shaft and a mechanically-driven door at each floor the cage is to stop to allow ingress and egress of passengers, a control system for at least controlling operation of the mechanical door in response to passengers desiring to load on the lift, said control system comprising:
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a spatial filter inside the cage of the lift, said spatial filter including a fence reticle with the reticle stripes oriented in a parallel relationship to the movement of the mechanical door; discriminating means for discriminating between signals below and above a predetermined level as received from said spatial filter, and for producing a control signal when the signals are above the predetermined level; and active means connected to said discriminating means for controlling closure of said door. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification