Abstract: A laser apparatus includes two sets of pumping arrangements for providing pumping energy for a laser medium used in common, each comprising a reflector with a reflective surface which defines an elliptical cavity and a pumping source located along a focal line of the ellipse formed by the elliptical cavity. One pumping arrangement is usually used and the other is held in reserve as a spare. When the former is out of order, the latter is automatically made available.

Abstract: The running toy with a flywheel of the invention has a toy driving unit to form a first transmission path with a first gear ratio to energize and rotate the flywheel at a high speed when driving wheels are rubbed against a floor for drive, and a second transmission path to rotate the driving wheels with the flywheel as a drive source at a speed reduced by a second gear ratio different from the first gear ratio when the drive of the driving wheels is stopped, thereby running the running toy at a speed different from the speed at time of energizing of the flywheel, a frictional rotation transmitting section provided in the second transmission path to yield a slip when the driving wheels are applied with overload.