Abstract: A window fan which can be mounted in a window opening in either a double-hung window frame or a vertical slider window frame and which can be held securely in place without the use of additional hardware or mounting brackets. The window fan comprises a housing of generally rectangular shape, the housing including a front piece, a back piece, and a pair of side extensions. The side extensions have outer edges sized and shaped to fit within the left and right side railings of a double-hung window or the top and bottom railings of a vertical slider window. Each one of the side extensions includes a pair of outer guides and a plurality of panels telescopically mounted within the outer guides. The side extensions extend out from the sides of the housing at about the rear edge so as to permit installation in windows having outer screens.

Abstract: A window fan which can be mounted in a window opening in either a double-hung window frame or a vertical slider window frame and which can be held securely in place without the use of additional hardware or mounting brackets. The window fan comprises a housing of generally rectangular shape, the housing including a front piece, a back piece, and a pair of side extensions. The side extensions have outer edges sized and shaped to fit within the left and right side railings of a double-hung window or the top and bottom railings of a vertical slider window. Each one of the side extensions includes a pair of outer guides and a plurality of panels telescopically mounted within the outer guides. The side extensions extend out from the sides of the housing at about the rear edge so as to permit installation in windows having outer screens.

Abstract: A portable electric heater/fan which can oscillate from side to side over a distance of 45 degrees or 90 degrees or remain stationary and which can also be tilted backward or forward so as to provide a beam of hot or cold air whose lateral extent and direction can be adjusted over two mutually perpendicular axes includes a compartment containing a heater/fan assembly and being slidably mounted for back and forth tilting movement on a neck joint fixed to a main gear carried by a shaft mounted for rotation about a vertical axis on a base. The main gear is coupled by a drive gear to the shaft of a synchronous electric motor mounted on the base. A first and a second set of cooperable limit stops are provided on the base and main gear for limiting the rotation of the main gear by the motor to either 90 degrees for the first set or 45 degrees for the second set.