Abstract: A boat for spillwater raft rides or similar rides having running gear includes running wheels and lateral guide wheels to accept a force exerted by a portion of the track. A safety device is provided that consists of safety wheels or runners. The latter are located above lateral guide wheels and designed to engage safety rails placed along the line to accept lifting forces.

Abstract: A rail vehicle has a pivotal latch pivotally mounted to its frame so that gravity urges one end of the locking latch toward a rack extending along the railway on which the rail vehicle is positioned for movement. A smooth slideway extends parallel to and adjacent the rack and a rocker arm pivotally mounted on the locking latch has a lower end pivotally urged by gravity into contact with the slideway so that forward movement of the rail vehicle pivots the rocking arm to cause the locking latch to be pivoted upwardly out of contact with the rack with any initiation of rearward movement causing reverse pivoting of the rocker arm to lower the locking latch into engagement with the rack to prevent further reverse movement of the vehicle. Maintaining the locking latch out of contact with the rack during forward movement reduces wear and avoids the generation of clacking noise during forward movement of the vehicle.

Abstract: Rollback-preventing apparatus for a rail vehicle for engaging a toothed rack securely joined to the rail track includes a detent pawl attached to the wheel of the rail vehicle. The detent pawl has a ratchet which is shaped for engagement in the toothed rack. The detent pawl is frictionally engaged with a friction disk that is rotated by the wheel of the rail vehicle. The extent of rotational movement of the detent pawl is limited by a stop. The frictional engagement between the detent pawl and the friction disk raises the ratchet above the toothed rack during travel of the rail vehicle in the normal direction, preventing engagement and noise. If the rail vehicle begins to move backwards, the ratchet of the detent pawl is moved by the frictional engagement of the disk and detent pawl into engagement with the toothed rack and thus prevents the vehicle from rolling backward.