Abstract: A light emitting diode lamp comprises: a heat dissipating assembly including a column unit and a coolant container, the column unit defining opposite first and second fluid passages separated from each other, the coolant container defining a coolant storing space for storing a coolant therein; a heat sink mounted on the heat dissipating assembly and defining a fluid channel therein; a light emitting unit including at least one light emitting diode and mounted on the heat sink; and a coolant driving member. The coolant driving member, the heat sink, the coolant container and the column unit are coupled together so that the coolant driving member drives circulation of the coolant through the first and second fluid passages, the coolant storing space and the fluid channel.

Abstract: A paper folding device includes a drive roller, a delivery roller and a follower roller extending longitudinally between and mounted rotatably on a pair of partition plates. The delivery roller is mounted slidably on the partition plates so as to permit lateral movement of the delivery roller toward and away from the drive roller. A paper support member extends longitudinally between the partition plates, and is disposed below the delivery roller and the drive roller. The paper support member confines a paper inlet to permit extension of a paper sheet to be folded therein. Rotation of the drive roller forces the paper sheet that extends into the paper support member to bend toward the drive roller and the follower roller so as to be grasped by the latter in order to form a fold in the paper sheet.

Abstract: A shredding machine includes a machine housing having a top wall formed with an inlet, a cutting device disposed in the housing adjacent to the inlet, and a contact-type control switch assembly mounted on the top wall of the housing and connected electrically to the cutting device. The control switch assembly includes a multi-position slide switch with a slider, and a contact switch. The top wall of the housing is formed with an access hole having a front portion adjacent to the inlet and aligned with the contact switch, and a rear portion distant from the inlet and aligned with the slide switch. A switch actuator unit includes a slider actuator that is mounted slidably in the rear portion of the access hole and that engages the slider, and a contact arm actuator connected to the slider actuator and disposed in the front portion of the access hole.

Abstract: A paper shredder includes a box-like casing, a shredding roller assembly provided in the casing, and an automatic paper feeding device. The shredding roller assembly includes a pair of rotatable shredding rollers and a motor driving unit connected to the shredding rollers. The feeding device includes a tray which is mounted to the casing adjacent to the shredding roller assembly, a rotary shaft which is mounted rotatably on the tray, a tension spring which is connected to the rotary shaft and the tray, and at least one push rod, each of which having two pivotally connected rod sections. A first one of the rod sections is mounted on the rotary shaft, while a second one of the rod sections is provided with a press piece which presses against a stack of paper sheets on the tray.

Abstract: A paper shredding roller includes a rotatable knife shaft, a plurality of circular knives and a plurality of circular spacers. The knife shaft has a polygonal cross-section. Each of the circular knives is provided on the knife shaft and has a polygonal central through hole that corresponds with the cross-section of the knife shaft so as to permit the knife shaft to extend fittingly therethrough. Each of the circular knives is provided with a plurality of equiangularly spaced unidirectional cutting elements, the number of which is unequal to a number of sides of the knife shaft. The cutting knives are provided on the knife shaft in such a manner that the cutting elements of each circular knife are displaced angularly by a predetermined angle from corresponding ones of the cutting elements of an adjacent one of the circular knives so that the cutting elements of the circular knives are arranged on a number of helical rows that extend along the rotatable knife shaft.