Method and device for switching-off a supervision system
US4240060A · kind A · utility
0Cited by
3References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 27, 1976 |
| Grant date | Dec 16, 1980 |
| Priority date | — |
| Expiry date | Dec 27, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60L2200/26
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A method of and a device for switching-off a supervision system, e.g. a system for supervising the speed of a train. It must be possible to switch off the supervision system, but only when a predetermined pattern of operations are followed. This is achieved by using a time control activation current loop to briefly operate a contact device by means of first and second operating members in combination with a time independent activation current loop that holds the contact device closed provided the predetermined pattern of operations is followed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.