Method and equipment for the secure and convenient input of control commands, in particular in lift installations
US4979594A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 1989 |
| Grant date | Dec 25, 1990 |
| Priority date | — |
| Expiry date | May 4, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B2201/4676
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
In this wireless remote control system, control signals and reporting-back signals are bidirectionally transmited between at least one portable transmitter-receiver unit, a stationary transmitter-receiver unit and a control. The portable transmitter-receiver unit contains a microprocessor and is carried, for example, by hand or in a clothing pocket. Control commands are input, depending upon their frequency of occurrence, by way of a ten-key keyboard, fixed keys or stored in a storage and transmitted as control signals via an operating mode selector switch selectively in either one of the operating modes "manually by push-button" or "automatically, permanently". The signalling is non-public and on an indicator. The stationary transmitter-receiver unit with microprocessor is mounted stationarily in the transmission range of the associated portable transmitter-receiver unit and communicates the received control commands to the control. This remote control permits location-independent input of public and non-public operating requests into elevator installations and thereby a conveniently and secure call issue to protected storys. The method and the equipment can likewise be used for o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.