Automatic door control apparatus
US4386398A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1981 |
| Grant date | May 31, 1983 |
| Priority date | — |
| Expiry date | Mar 27, 2001 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05Y2900/106
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An automatic door operation control apparatus is disclosed which comprises a door operating device a driving device for opening and closing the door, a condition detector for detecting a condition under which the movement of the door by the driving device is required to be discontinued, and a main control device for issuing a driving command to the driving device to actuate the same as required in response to a condition detection signal from the condition detector. The apparatus further comprises an auxiliary control device for stopping the operation of the driving device in the event that the main control device fails to issue a command to the driving device to stop the door movement within a predetermined length of time in response to the condition detection signal from the condition detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.