Remote monitoring system with variable period communication check
US5398782A · kind A · utility
26Cited by
6References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1993 |
| Grant date | Mar 21, 1995 |
| Priority date | — |
| Expiry date | Nov 12, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B5/0037
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A remote elevator monitoring system includes a master associated with a building and a local connected to the master. The local includes an electronic processor which executes instructions for determining whether the master has transmitted a signal packet to the local within a time period selectable at will by an operator at the local. The time period is, for example, a period selected within a range of 0-255 days. Optionally, for example, the master is programmed to transmit a signal packet to the local at a selected time on the last day of the selected time period.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.