Abstract: A ceiling fan and a surrounding device thereof are provided. The ceiling fan includes a main body, a bracket set connected to the main body, and a surrounding device connected to the bracket set. The main body includes a main shaft, a motor, and a plurality of ceiling fan blades. The bracket set includes a plurality of brackets, and each of the brackets has one end connected to the main shaft. The surrounding device is connected to another end of each of the brackets that is relatively far away from the main shaft, and the surrounding device is roundly arranged around and spaced apart from an end of each of the ceiling fan blades that is relatively far away from the motor. The surrounding device includes at least one functional component that is configured to disinfect or sterilize air or to provide lighting.

Abstract: A ceiling fan and a surrounding device thereof are provided. The ceiling fan includes a main body, a bracket set connected to the main body, and a surrounding device connected to the bracket set. The main body includes a main shaft, a motor, and a plurality of ceiling fan blades. The bracket set includes a plurality of brackets, and each of the brackets has one end connected to the main shaft. The surrounding device is connected to another end of each of the brackets that is relatively far away from the main shaft, and the surrounding device is roundly arranged around and spaced apart from an end of each of the ceiling fan blades that is relatively far away from the motor. The surrounding device includes at least one functional component that is configured to disinfect or sterilize air or to provide lighting.

Abstract: An alarm light device comprises a casing seat having a power wire passing through a lower side thereof; a base installed on the casing seat; a bottom of the base being installed with a motor; a rotary shaft of the motor passing through the base to be protruded from an upper side of the base; a driven gear installed around the rotary shaft and a driven gear being installed in the case and being engaged to the driving gear; a rotary seat being installed on the driven gear; at least one reflector cambered mirror being installed on the rotary shaft; a center portion of the rotary seat having a through hole; a lamp seat installed in the through hole; at least one first strong power source being installed in the lamp seat; and a cover covering upon the base so as to form an alarm light.

Abstract: A transistor-transistor logic gate is described which uses a number of bipolar switching transistors clamped in several different ways. In particular to better adapt a bipolar switching transistor to high frequency, high temperature operation, the collectors of the various switching transistors are clamped in a variety of novel ways, each to achieve a collector voltage higher than that normally achieved by the conventional Schottky diode clamp connected between the base and collector.