Abstract: Disclosed herein is a human powered rail bike. The rail bike includes a chassis having a predetermined shape. Rail wheels comprising a pair of front wheels and rear wheels, roll along two rails of the track which are arranged side by side. A plurality of seats is mounted to the chassis. A one-way clutch capable of changing direction limits the rotating direction of an axle to one direction, that is, a forward direction or a backward direction. A plurality of crank pedals is rotatably mounted to the chassis, and is connected to the one-way clutch capable of changing direction via a chain. A direction conversion lever functions to convert the rotating direction of the one-way clutch. Further, a pair of brake units is provided to reduce the speed of the rail bike or stop the rail bike.

Abstract: Many dead results from train accidents every year. A simple invention like train forerunner can save many lives. What is a train forerunner? Basically, it is an extra train engine running independently ahead of the train at the same speed of the train with its own train engine. The train forerunner is not coupled to the train or train engine but running independently ahead of the train engine or train. The train forerunner is controlled by remote control to run at the same speed of the train while the train engine is controlled by a engineer. The remote controlled train forerunner can be programmed to run ahead at a distance that a train is able to stop.

Abstract: Disclosed is a mobile rack system intended for an efficient use of a limited space of store house and the like for storing books and other goods, having a plurality of mobile racks adapted to run along rails laid on the floor of the store house. The system incorporates at least one human-power driven pedal-actuated driving source. The driving source may be provided for each of the mobile racks or may be provided independently of the mobile racks for running along separate rails. The driving source has a pair of pedals, at least a pair of driving wheels, speed reduction transmitting means between the pedals and the driving wheels, and a saddle for the operator to sit on, the position of which being switchable in accordance with the direction of movement of the rack or the tractor.Braking means are provided for preventing the mobile racks from moving unintentionally, thereby to avoid accidents due to the collision of racks.