Device for controlling safety seat belts
US4015236A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 14, 1976 |
| Grant date | Mar 29, 1977 |
| Priority date | — |
| Expiry date | Jan 14, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R2022/4816
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A device for checking and controlling the proper closing and locking of a safety belt of the seat of a vehicle, comprising a system for emitting electrical oscillations and at least one receiver, and reference electric switches for detecting the position of the belt and the presence of the occupant of the seat, and an alarm system. The emitter system comprises a low-frequency (excluding radio frequency oscillations) oscillator located on the lap portion of the belt strapping, said receiver comprising a pair of coils located the one under the upholstery of the seat back and the other under the upholstery of the seat bottom, each coil being associated with an amplifier and with a double voltage comparator receiving in each comparator a predetermined reference voltage with which the voltages of the signals representing the highest voltage limit or the lowest voltage limit, which are received on the corresponding coil, are compared, as a function of the position of the oscillator of the emitter system, a logic system of a type known per se receiving the signals from said comparators and from the reference switches for transmitting said signals to said alarm system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.