Abstract: A window fan which can easily installed in a window opening without requiring the use of extraneous tools or mounting hardware. In one embodiment, the window fan comprises a housing, the housing is generally box-like in shape and is dimensioned for use with virtually any double-hung window. Disposed within the housing is a fan unit comprising a motor and a propeller-like blade rotatably mounted on the motor. The top portion of the housing is shaped to include a lip and, in addition, is shaped to include an elongated, recessed tray which extends transversely below the lip. A C-shaped clip, having a tab adapted to engage the opposite side of a closed window, is movably mounted along the longitudinal axis of the tray and includes a pair of outwardly-extending, spring arms which arc adapted to matingly engage alternative, spaced-apart sets of grooves formed on opposing side walls of the tray for use in locking the clip at specific locations within the tray.

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: An electric heater circuit for an electric heater includes a set of heater coils for generating heat, a normally closed temperature sensitive switch for deactivating the heater coils when the temperature inside the electric heater exceeds a predetermined threshold temperature, a normally closed tilt sensitive switch for deactivating the heater coils in response to tilting movement of the electric heater beyond a predetermined amount relative to a normal upright position, a light and buzzer combination for providing signals when either the temperature sensitive switch is opened as a result of the temperature inside the electric heater exceeding the predetermined threshold temperature or the tilt sensitive switch is opened as a result of tilting movement of the heater beyond the predetermined amount relative to the normal upright position, fan and an adjustable thermostat.

Abstract: An electric heating assembly adapted to be mounted onto and plugged into a wall-mounted electrical outlet includes a heating unit having a plug member an a back wall, thereof which is directly mateable with a power receptacle of the electrical outlet. The heating assembly also includes a mounting clip for securely coupling the heating unit to the electrical outlet so that the heating unit will not become inadvertently disengaged therefrom. The mounting clip includes a generally rectangular base portion securable to the outlet plate of the electrical outlet with the screw used to mount the outlet plate. The mounting clip also includes a pair of legs which extend away from the base portion and which mate with a pair of holes formed in the back wall of the heating unit above the plug member.