Protection device to prevent train incursions into a forbidden area

A protection device for use with a remote controlled braking system of a train having a locomotive, the remote controlled braking system including:

• a) a first functional unit for mounting in the locomotive of the train;
• b) a second functional unit for mounting on the train, the first unit and the second unit being operative to establish an RF communication link therebetween;
• c) the first functional unit being operative to transmit to the second functional unit a brake command over the RF link to cause the second functional unit to apply a brake of the train;
• d) said protection device being remote from said train and including:
• i) a detector for generating a detector signal when a certain condition occurs;
• ii) a transmitter responsive to the detector signal to transmit an RF signal indicative of a brake command over the RF link to the second functional unit, said second functional unit being responsive to receipt of the brake command from said transmitter to apply the brake of the train.

A protection device for use with a remote controlled braking system of a train having a locomotive, the remote controlled braking system including:

• a) first means for receiving and transmitting RF signals, said first means adapted to be mounted in the locomotive of the train;
• b) second means for receiving and transmitting RF signals, said second means adapted to be mounted on the train, the first means and the second means being operative to establish an RF communication link therebetween;
• c) the first means being operative to transmit to the second means a brake command over the RF link to cause the second means to apply a brake of the train;
• d) said protection device being remote from the train and including:
• i) transmitter means operative to transmit an RF signal indicative of a brake command over the RF link to the second means, said second means being responsive to receipt of the brake command from said transmitter means to apply the brake of the train.