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US 6,481,531 B1Granted
Elevator communications apparatus
AssigneeHitachi, Ltd.
InventorsHirokazu Nagura, Hiromi Inaba, Sadao Hokari, Atsuya Fujino
Life of this patent
Estimating the term…
Abstract
The number of electrical wires in the car is reduced by radio communications between the operation panel and terminal. Furthermore, reliability and dependability of communications are improved because the operation panel and terminal communicate with each other at a comparatively short distance.
Claims13
An elevator communications apparatus comprising;
- an operation panel provided in the car of an elevator and containing a radio communications apparatus, and
- a terminal for communications with said operation panel by short-range radio via said radio communications apparatus;
- said elevator communications apparatus characterized in that signals related to said communications are exchanged between the controller of said elevator and said terminal.
An elevator communications apparatus comprising;
- an operation panel provided in the car of an elevator and containing a radio communications apparatus, and
- a terminal provided in said car for communications with said operation panel by radio via said radio communications apparatus;
- said elevator communications apparatus characterized in that signals related to said communications are exchanged between the controller of said elevator and said terminal.
An elevator communications apparatus comprising;
- an operation panel provided in the car of an elevator and containing a radio communications apparatus, and
- a terminal provided outside said car for communications with said operation panel by short-range radio via said radio communications apparatus when approaching said operation panel;
- said elevator communications apparatus characterized in that signals related to said communications are exchanged between the controller of said elevator and said terminal.
An elevator communications apparatus comprising;
- an operation panel provided in the car of an elevator and containing a radio communications apparatus, and
- a terminal for communications with said operation panel by radio via said radio communications apparatus;
- wherein a pair of the frequency band and intensity of electric field is one of the following pairs, that is:
- the frequency band, 322 MHz or less, of said radio communications apparatus, and intensity of electric field, 500 μV/m or less, 3 meters away from said radio communications apparatus;
- the frequency band, from 322 M to 10 GHz, of said radio communications apparatus, and intensity of electric field, 35 μV/m or less, 3 meters away from said radio communications apparatus;
- the frequency band, from 10 G to 150 GHz or less, of said radio communications apparatus, and intensity of electric field, 500 μV/m, 3 meters away from said radio communications apparatus;
- and
- the antenna power of said radio communications apparatus is 10 mW or less.
5 more elements
An elevator communications apparatus comprising;
- an operation panel which is provided in the car of an elevator, contains a radio communications apparatus, and communicates with the controller of said elevator;
- wherein said operation panel produces alarm when brought outside.
An elevator communications apparatus comprising;
- an operation panel which is provided in the car of an elevator, contains a radio communications apparatus, and communicates with the controller of said elevator,
- a secondary battery for supplying power to said operation panel, and
- a solar battery for charging said secondary battery;
- wherein, when the remaining power of said secondary battery has reduced below the specified value, said radio communications apparatus sends a radio signal for turning on the illuminating light in said car.
1 more element
An elevator communications apparatus comprising;
- an operation panel which is provided in the car of an elevator, contains a radio communications apparatus, and communicates with the controller of said elevator, and
- a secondary battery for supplying power to said operation panel;
- said elevator communications apparatus further characterized in that, when the remaining power of said secondary battery has reduced below the specified value, the indicator light or response light of said operation panel flashes.
Dependencies are inferred from the claim text.