Abstract: A power transmission structure with a dual blade shaft of a circular saw wherein the rear end of the driving shaft of the driving roller is provided with a fixing plate pivotally mounted with a steering roller, a steered roller and a dual level transmission roller. These rollers are surrounded with a first transmission belt, and the fixing plate is provided with a floating rod having an adjustable roller. The rear end of the driven shaft has a driven roller, and the driven roller, the adjustable roller and the dual level transmission roller are provided with a second transmission belt. The first and second transmission belts are used to cause the saw blade and pre-cut blade of the driven shaft to rotate in reverse directions. The tightness of the second transmission belt is adjusted by the floating rod.

Abstract: A hose connector for hose of a dust collector is disclosed. The hose connector has a housing containing a blower, a blade module, a hose and the hose connector includes a covering plate, wherein the center of the covering plate of the hose connector is provided with a through hole and the lower edge next to the hose connector is protruded out an urging edge which can resist against the circumferential edge of the covering plate, and the lower edge of the hose connector is protruded out an engaging block which can engage to the lower inner edge of the through hole of the covering plate, and on the hose connector adjacent to the engaging block, a stopping pad is disposed such that when the stopping pad is at the covering plate of the hose seat the length of the stopping pad facing downward is beyond the top end of the blade module and a curved gap is formed between the stopping pad and the blade module.

Abstract: A securing seat for holding filtering cylinder of a dust collector is disclosed. The securing seat includes a binding mount and a binding belt, and the middle section of the inner edge of the binding mount is protruded with an inverted L-shaped holding plate. The top face of the binding mount is an engaging slot for engagement with a filtering cylinder. The top edge and the bottom edge at the inner face of the binding mount and the holding plate are respectively formed into lid and fastening slot. The filtering cylinder is mounted to the engaging slot and the lid and the fastening slot are adhered to each other. Thus, the securing seat is provided with excellent air tightness and the securing seat is firmly secured, and the air suction of the dust collector is improved.

Abstract: A dust-collection structure of a dust-collection device includes a body, a dust-collection module, a moving seat and a dust-filtering module. The cart body is provided with a blower having a driving member and the top face of the blower is provided with a connection tube connecting to the dust-filtering module; the dust-collection module is a hollow cylindrical body positioned onto the cart and the cylindrical body is used to hold the dust-collection bag and the top edge of the cylindrical body is a connection body for mounting with the moving seat; the moving seat comprises two upward extended upright rods mounted at the cart body and the top end of the upright rod is pivotally connected with a corresponding extended shaft and the connecting body is locked between two extended shafts, and the circumferential edge of connection body is provided with a connection tube to connect with the dust-suction tube.

Abstract: A power transmission structure with a dual blade shaft of a circular saw is disclosed. The rear end of the driving shaft of the driving roller is provided with a fixing plate pivotally mounted with a steering roller, a steered roller and a dual levels transmission roller. These rollers are surrounded with a first transmission belt, and the fixing plate is provided with a floating rod having an adjustable roller. The rear end of the driven shaft has a driven roller, and the driven roller, the adjustable roller and the dual level transmission roller is provided with a second transmission belt. The first and second transmission belts are used to cause the saw blade and pre-cut blade of the driven shaft to rotate in reverse direction. The tightness of the second transmission belt is adjusted by means of the floating rod.

Abstract: A method and apparatus in a data processing system for processing graphics image. A determination is made as to whether the graphics image has more than two colors. The graphics image is compressed in response to an absence of a determination that the graphics image has more than two colors to form a compressed image. The compressed image is sent to a client.

Abstract: A hose connector for hose of a dust collector is disclosed. The hose connector has a housing containing a blower, a blade module, a hose and the hose connector includes a covering plate, wherein the center of the covering plate of the hose connector is provided with a through hole and the lower edge next to the hose connector is protruded out an urging edge which can resist against the circumferential edge of the covering plate, and the lower edge of the hose connector is protruded out an engaging block which can engage to the lower inner edge of the through hole of the covering plate, and on the hose connector adjacent to the engaging block, a stopping pad is disposed such that when the stopping pad is at the covering plate of the hose seat the length of the stopping pad facing downward is beyond the top end of the blade module and a curved gap is formed between the stopping pad and the blade module.

Abstract: An improved structure of a dust-filtering module of a dust-collecting device which is characterized in that the top end of the mounting body is provided with a top mounting ring having an L-shaped cross-section, a fastening structure is formed between the mounting body and the dust-filtering module, the dust-filtering module is provided with an external hood body connected to a connection hose, a filtering device is provided within the dust-filtering module, the filtering device has a corrugated board having a bottom face mounted across a bottom rod, the bottom rod is pivotally mounted with an axle passed through the filtering device, the circumferential edge of the axle is provided with a plurality of wiping plates which resist the corrugated filtering board, and the axles which passes out of the external hood body locked to a rocking shaft.

Abstract: A dust-collection structure of a dust-collection device includes a body, a dust-collection module, a moving seat and a dust-filtering module.

Abstract: An improved structure of a dust-filtering module of a dust-collecting device is disclosed, which is characterized in that the top end of the mounting body is provided with a top mounting ring having an L-shaped cross-section, which can be mounted onto the bottom edge of the dust-filtering module and a fastening structure is formed between the mounting body and the dust-filtering module such that the dust-filtering module and the mounting body can be engaged with each other and can be separated from each other; and the dust-filtering module is provided with a external hood body connected to a connection hose, and the connection hose can be mounted to a hose connected to the blower, and a filtering device is provided within the dust-filtering module and the filtering device has a corrugated board surrounded thereto and the bottom face of the board is mounted across a bottom rod, and the bottom rod is pivotally mounted with a axle passed through the filtering device, and the circumferential edge of the axle is p

Abstract: A dust-removing device for the filtering tube of a dust-collecting apparatus is disclosed. The dust-removing device is provided with a controller and a high pressurized air storage tank, and the tank employs a control valve to connect the nozzle tubes corresponding to the filtering tubes. The controller makes use of the vacuum detector to determine the blockage condition of dust in the filtering tubes so as to open the control valve to clean away the dust on the dust-filtering tubes. The dust-removing device thus automatically cleans away the dust and maintains a clean dust-collecting apparatus, whereby the longevity of the device is prolonged.

Abstract: A motor synchronous excitation brake that shortens the braking time and promotes braking accuracy, comprised of a brake and a motor, the motor having a casing adapted with an exciting coil and a rotor with a shaft, and two end caps each adapted with a braking shoe being respectively provided on both ends of the casing; and the brake being provided between both ends of the rotor and those two end caps, the brake disk being activated synchronously be an excitation coil to apply braking when the motor stops characterized by having two inclined wedges being respectively extending towards the rotor from the outer circumference of a central hole of both brake disks; the wedge being close to the shaft; a graded edge each protruding from the shaft at both ends of the rotor; and a wedge-shaped slot in relation to the inclined wedge on the graded edge to increase excitation area and shorten braking distance and moment.

Abstract: A driven roller is mounted with an eccentric-swinging device which has the function of swinging, and the eccentric-swinging device comprises a floating frame, a transmission structure, and a flat plate mounted onto the machine body of the device, and the center section of the floating frame is mounted with a shaft seat, and the bottom surface within a support frame is mounted with corresponding bearings such that the shaft seat holds the bearings formed into a rotating support for the floating frame, and in between the floating frame and the flat plate, a spring which can be pulled downward is mounted, and the transmission structure is attached to the floating frame, corresponding to one lateral side of the flat plate, the transmission structure is synchronously driven by the shaft rod of the driven roller, and the flat plate is mounted with a rotatable shaft center, wherein a free end of the shaft center forms into an eccentric post, and a bearing urging the top face of the flat plate is mounted onto the ecc

Abstract: A swinging device for a sanding device, is disclosed. The swinging device has a swinging element, having mounted with a bi-axle motor, mounted to a sanding module, and the bi-axle motor synchronously drives a driving structure mounted to the swinging element, and the driving structure is provided with a shaft rod having an eccentric post, and the eccentric post is mounted to a limiting rod of the sanding module for limiting purpose, thus, when the bi-axle motor is initiated, the shaft rod is synchronously driven, and the eccentric post is used for limiting purpose. The entire swinging device causes the sanding module to produce a reciprocating swinging, and the sanding belt produces a tangential sanding effect.

Abstract: A reciprocating-type abrasive device for a sanding machine is disclosed. In the present invention, one end of the support frame of the sanding module is provided with a driving roller having a motor, and the other end of the support frame is mounted with the reciprocating-type abrasive device having a driven roller, and the driven roller corresponds to the driving roller and both are surrounded by a sanding belt, and the reciprocating-type abrasive device comprises a driving structure and a reciprocating structure, and the reciprocating structure is mounted with a sanding wheel which reciprocates up and down by the driving structure, thereby the sanding wheel produces a reciprocating abrasive action and the entire sanding effect is improved.