Abstract: A separation device of a paper towel includes a housing provided with two roll sets each having at least two rolls that may be driven by a power member to rotate relative to each other at an equal speed, so that a continuous paper towel may pass between the rolls of the two roll sets and may be pulled downward. The paper towel is provided with sensing marks at a predetermined length, so that when the sensing mark of the paper towel passes through a detection member, the detection member may detect passage of the sensing mark of the paper towel, and may send a signal, so that a rotation speed difference is produced between the rolls of the two roll sets, and the paper towel passing between the rolls of the two roll sets may be torn off.

Abstract: A control circuit for controlling the rotational speed of a heat-dissipation fan for an electronic device, the circuit including a temperature sensing circuit for sensing the ambient temperature of the device and providing a temperature signal, a comparator circuit for receiving the temperature signal and for comparing it with a predetermined threshold, and a drive circuit for receiving the comparison signal and for controlling the rotational speed of the fan so that, when the ambient temperature is above the threshold, the speed changes substantially linearly with respect to the difference between the ambient temperature and the threshold and, when the ambient temperature is below the threshold, the fan is stopped.

Abstract: A composite heat dissipation fan, including an impeller having first blades, and the first blades having a periphery combined with second blades for creating a side directed wind supply. The impeller is provided with a magnet ring which is energized with the stator coils of the base plate, so that the impeller is induced to rotate about the rotation shaft of the base plate. The first blades draw the ambient cold air through the wind inlet opening, and the wind outlet opening of the base plate drains the wind outward. The second blades uses part of the cold air to drain wind sideward, thereby providing a multi-directional wind draining effect so as to increase the heat dissipation efficiency.

Abstract: The bearing mainly includes an inner groove and at least a passage. The groove is arranged on an inner surface of the bearing and connected with a reservoir on one end of the bearing by the passage to induce the outflow lubricant backflow to the groove.

Abstract: A rolling up device for rolling up wet paper towels includes a main body with two side plates. Two spaced rollers are rotatably mounted between the side plates of the main body. A rolling up belt is mounted around the rollers to rotate therewith. Individual wet paper towel is passed through a space between a rolling up plate and the rolling up belt and is thus rolled. Redundant water in individual wet paper is removed when it is passed through the rolling up plate.

Abstract: A heat exchange device includes a case-shaped cover directly contact on a heat source to exchange heat, an air-in tube having one end connected to the cover, a fan fixed on an outer wall of a case of an appliance having the heat source and connected to the air-in tube, and an air-out tube having one end connected to the cover and the other end extending out of the case of the appliance to outer air. Then the fan, the air-in tube, the cover and the air-out tube make up a heat exchange route, with cool outer air blown into the air-in tube by the fan, then flowing a round in the cover to flow out of the air-out tube so that hot air within the case of the appliance may be exhausted, not staying therein.