Abstract: A fan structure is disclosed to include a base member having a socket at the center, a fan assembly, a first support member connected to the fan assembly and having a bottom stub tube insertable into the socket of the base member and lockable thereto by a screw member to support the fan assembly above the base member for use as a desk fan, and a second support member selectively connectable between the bottom stub tube of the first support member and the socket of the base member to support the fan assembly and the first support member above the base member for use a floor fan.

Abstract: An electric fan, which includes a saucer-like base for positioning on a flat surface, a floor fan connector for fastening to the base, a fan assembly, the fan assembly having a downwardly extended bottom coupling tube and a peg raised from the periphery of the bottom coupling tube, a stem for connection between the fan assembly and the floor fan connector, enabling the fan assembly and the base to be assembled into a floor fan, a lock screw for threading into a screw hole at the peg of the bottom coupling tube to secure the fan assembly to the stem, a lock nut for threading onto an outer thread at the stem to secure the stem to the floor fan connector and the base, and a desk fan connector for fastening the bottom coupling tube of the fan assembly to the base, enabling the fan assembly and the base to be assembled into a desk fan.

Abstract: An electrical window fan comprising a reversible motor driven air blower assembly and a housing having intake and exhaust openings and a rectangular duct with an internal minor width smaller than the major diameter of the blower, the duct being adapted to extend through a window opening and for hanging the fan over the stool cap of the window such that most of the fan is positioned indoor of and below the window opening.

Abstract: A swivel mechanism for the electrical fan having the motor used to drive the blade of the electrical fan is used to control the swiveling movement. The controlling elements generally includes an U-shape supporting bracket, a positioning post and a connecting mechanism which is disposed between the output shaft and the positioning post. The motor is supported by an U-shape supporting bracket and the U-shape supporting bracket includes a pair of legs which can be connected to the rear housing by a pair of screws. Accordingly, the motor is capable of pitching upward and downward by the help of the screws. The lower end of the U-shape supporting bracket is rotatably mounted onto a positioning post, accordingly, the supporting bracket being capable of swiveling thereof.