Abstract: A motor-driven, window mounted portable fan with cigarette-lighter plug. The fan, or impeller, is mounted in an impeller housing which in turn is mounted centrally on one face of a window prop. The window prop is rectangular in shape and has lengthwise slideways on both of its sides. Extension pieces fit in the slideways so that the slideways can be lengthened to fit different sized windows. Opposite the impeller housing is a rain cover and a vent lid, which covers a vent. The vent lid is opened and closed by a motor, via an activation arm.

Abstract: The present invention relates to an exercising device and more particularly to one substantially comprising a bicycle frame, a rear wheel, two driven wheels a chain drive arrangement and a base frame wherein the rear wheel is rotatively mounted at the rear end of the bicycle frame; the base frame supports the bicycle frame in a manner such that the rear wheel may rest on the two driven wheels. The major feature of the present invention is that the hub of the rear wheel is eccentrically disposed whereby the saddle of the bicycle frame may perform up-and-down motion while the chain drive arrangement is driven by a rider of the exercising device.