| Patent Number |
Title Of Patent |
Date Issued |
| 5398783 |
Elevator hall call device with integral indicator display element |
March 21, 1995 |
| An elevator hall call button includes a switch (20, 56) as well as displays (21, 54, 55) comprising matrices of light emitting diodes to provide an indication to a passenger of the imminence of arrival of the responding car. The display can be floor position (FIG. 5), flashing at a varyi |
| 5001459 |
Escalator handrail guard warning device |
March 19, 1991 |
| The location on an escalator where the handrail reenters the balustrade is provided with an electrical field projector which will establish a limited extent electrical field around the handrail reentry housing. The field is established with a pair of antennae disposed adjacent to the han |
| 4647921 |
Alphanumeric display |
March 3, 1987 |
| A display (22) has one or more digits (22-1, 22-2) each capable of displaying a plurality of alphanumeric characters. A character control (10) has an output line (12) for each possible character and provides a signal over the line to cause the character to be displayed by activating |
| 4261440 |
Automatically compensating object detection circuit |
April 14, 1981 |
| Antennae located in the doors of an elevator car are in circuit with a balanced bridge detector coupled to an oscillator. Increased capacitance to ground produced by a person or object between the doors creates a bridge disbalance, which gives rise to the production of a bridge output |
| 4058187 |
Limited stop elevator dispatching system |
November 15, 1977 |
| Apparatus for generating dispatching signals for a group of elevators operating between two terminals. The dispatching signals are generated at intervals computed in accordance with an estimated number of passengers the next car to be dispatched from each terminal will carry. This estima |
