The present invention provides a braking system (11) for braking a train. The system comprises an electronically controlled pneumatic brake network (ECP) and a brake activation unit (14). The brake activation unit provides status reports regarding the condition of the ECP and comprises at least one sensor for monitoring one or more properties of the ECP, and at least one venting means adapted to vent the pressure from a brake pipe (21). The system also comprises a telecommunication network (15, 17, 19) adapted to communicate with the brake activation unit. The brake activation unit can be activated using the telecommunication network to vent the pressure from the brake pipe, causing the train to brake.

The present invention provides a braking system (11) for braking a train. The system comprises an electronically controlled pneumatic brake network (ECP) and a brake activation unit (14). The brake activation unit provides status reports regarding the condition of the ECP and comprises at least one sensor for monitoring one or more properties of the ECP, and at least one venting means adapted to vent the pressure from a brake pipe (21). The system also comprises a telecommunication network (15, 17, 19) adapted to communicate with the brake activation unit. The brake activation unit can be activated using the telecommunication network to vent the pressure from the brake pipe, causing the train to brake.

An optical lens (10) capable of facilitating efficient light distribution control with a simple configuration is provided. It comprises a plurality of light distribution control parts (11) continuing in a bilateral direction such that each of the light distribution control parts corresponds to each column of LEDs (22), the light distribution control parts defining optical paths of light from the LEDs (22) on a column basis, in the light distribution control parts (11), optical paths each directing light entering from the LEDs (22) in a column corresponding to each of the light distribution control parts (11) to an optical axis direction are sequentially shortened from one end side to the other end side in the bilateral direction in this order, and each of the light distribution control parts (11) discharges light entering from the LEDs (22) in the corresponding column from a position at which the light distribution control part does not interfere with a light distribution control part (11) adjacent to the other end side to the same one direction of the bilateral direction that intersects optical axes of the LEDs (22).

An optical lens (10) capable of facilitating efficient light distribution control with a simple configuration is provided. It comprises a plurality of light distribution control parts (11) continuing in a bilateral direction such that each of the light distribution control parts corresponds to each column of LEDs (22), the light distribution control parts defining optical paths of light from the LEDs (22) on a column basis, in the light distribution control parts (11), optical paths each directing light entering from the LEDs (22) in a column corresponding to each of the light distribution control parts (11) to an optical axis direction are sequentially shortened from one end side to the other end side in the bilateral direction in this order, and each of the light distribution control parts (11) discharges light entering from the LEDs (22) in the corresponding column from a position at which the light distribution control part does not interfere with a light distribution control part (11) adjacent to the other end side to the same one direction of the bilateral direction that intersects optical axes of the LEDs (22).

A lighting device includes an indoor lamp (11), being provided in the cabin of a railroad vehicle (1) in order to wholly irradiate the inside of the cabin over the longitudinal direction of the vehicle, a vehicle body power supply (20), supplying electric power to the indoor lamp (11), and a storage battery (30), being charged with a voltage applied by the vehicle body power supply (20). The indoor lamp (11) includes a general lamp light source (12) and a standby lamp light source (13), being lighted at an illuminance lower than that at which the general lamp light source (12) is lighted, and the general lamp source (12) being supplied with electric power from the vehicle body power supply (20) not through the storage battery (30), while the standby lamp light source (13) being supplied with electric power from the vehicle body power supply (20) through the storage battery (30). In an emergency, electric power is supplied from the storage battery (30) only to the standby lamp light source (13), and the standby lamp light source (13) is continued to be lighted at the low illuminance.

A lighting device includes an indoor lamp (11), being provided in the cabin of a railroad vehicle (1) in order to wholly irradiate the inside of the cabin over the longitudinal direction of the vehicle, a vehicle body power supply (20), supplying electric power to the indoor lamp (11), and a storage battery (30), being charged with a voltage applied by the vehicle body power supply (20). The indoor lamp (11) includes a general lamp light source (12) and a standby lamp light source (13), being lighted at an illuminance lower than that at which the general lamp light source (12) is lighted, and the general lamp source (12) being supplied with electric power from the vehicle body power supply (20) not through the storage battery (30), while the standby lamp light source (13) being supplied with electric power from the vehicle body power supply (20) through the storage battery (30). In an emergency, electric power is supplied from the storage battery (30) only to the standby lamp light source (13), and the standby lamp light source (13) is continued to be lighted at the low illuminance.

A lighting system including a LED light source, a convex lens, and a light guide post disposed between the LED light source and the convex lens. The light guide post includes a light emitting portion and a light collecting portion connected to the light emitting portion. The light emitting portion has a light guide post-light emitting surface facing the convex lens. The light collecting portion has an internal reflective surface including at least an elliptical surface having a first focal point and a second focal point. The second focal point is located between the first focal point and the convex lens, and the second focal point is located inside the light guide post.

A lighting system including a LED light source, a convex lens, and a light guide post disposed between the LED light source and the convex lens. The light guide post includes a light emitting portion and a light collecting portion connected to the light emitting portion. The light emitting portion has a light guide post-light emitting surface facing the convex lens. The light collecting portion has an internal reflective surface including at least an elliptical surface having a first focal point and a second focal point. The second focal point is located between the first focal point and the convex lens, and the second focal point is located inside the light guide post.

A lighting structure for an exterior vehicle light unit has a light source with a principal light emission direction, at least one LED, a substantially parabolic reflector arranged to reflect light output from the light source in a first output region and to collimate the same in a primary light output direction. The light source is arranged in such a way with respect to the substantially parabolic reflector and the aspherical collimating lens that the principal light emission direction is inclined at an acute angle with respect to the primary light output direction.

A lighting structure for an exterior vehicle light unit has a light source with a principal light emission direction, at least one LED, a substantially parabolic reflector arranged to reflect light output from the light source in a first output region and to collimate the same in a primary light output direction. The light source is arranged in such a way with respect to the substantially parabolic reflector and the aspherical collimating lens that the principal light emission direction is inclined at an acute angle with respect to the primary light output direction.