using electric current passing between devices along the route and devices on the vehicle or train

Full Title

Devices along the route for controlling devices on the vehicle or train, e.g. to release brake or to operate a warning signal > Continuous control along the route > using electric current passing between devices along the route and devices on the vehicle or train

Child Classifications

Navigate with arrow keys, Enter to open

• B61L 3/185
• B61L 3/20 employing different frequencies or coded pulse groups