Abstract: A frequency-locked circuit for a variable frequency topology is configured to trigger a Pulse Width Modulation (PWM) controller to lock a frequency of a driving signal outputted by the PWM controller. The frequency-locked circuit includes an AC wave generating circuit and a comparator. The AC wave generating circuit receives and converts the driving signal to generate an AC wave signal. The comparator is electrically connected to the AC wave generating circuit and receives the AC wave signal. The comparator compares the AC wave signal with a reference signal to generate a comparison output signal. In response to determining that the AC wave signal is greater than the reference signal, the comparison output signal triggers the PWM controller to convert the driving signal from one voltage level to another voltage level so as to lock the frequency. The one voltage level is different from the another voltage level.

Abstract: A receptacle includes an electrically insulative bottom wall, and an electrically insulative upright wall upwardly extended from the border of the bottom wall, the upright wall having a back wall portion corresponding to the rear side of the bottom wall. The bottom wall is adapted for mounting at a circuit board or electronic device to hold a transformer in such a manner that the lead wires of the primary winding of the transformer are disposed at the front side of the bottom wall; the insulated lead wires of the secondary winding of the transformer are extended over the top edge of the back wall portion and then turned downwardly and bonded to the circuit board or electronic device.

Abstract: A receptacle includes an electrically insulative bottom wall, and an electrically insulative upright wall upwardly extended from the border of the bottom wall, the upright wall having a back wall portion corresponding to the rear side of the bottom wall. The bottom wall is adapted for mounting at a circuit board or electronic device to hold a transformer in such a manner that the lead wires of the primary winding of the transformer are disposed at the front side of the bottom wall; the insulated lead wires of the secondary winding of the transformer are extended over the top edge of the back wall portion and then turned downwardly and bonded to the circuit board or electronic device.

Abstract: A slide assembly may be associated with a foldable cable management arm. The slide assembly includes inner and outer rails. The inner rail is slidable in the outer rail. The inner rail includes a ball bearing carrier disposed close to an end of the inner rail. The ball bearing carrier includes upper and lower ball receiving channels. The inner rail may be directly provided with the upper and the lower ball receiving channels and the ball bearings. Each of the upper and the lower ball receiving channels includes an open section positioned in use facing the outer rail. A plurality of ball bearings are contained in both the upper and the lower ball receiving channels and roll along the open sections of the upper and the lower ball receiving channels to support the outer rail.

Abstract: A cable management arm supporting device includes an extendable supporting frame which has a first and second frames, a fixing member and a coupling member. The first frame has a pivotal portion and a casing portion. The second frame has an inserting portion and a fixing portion. The inserting portion is connected to the casing portion. The pivotal portion is connected to the coupling member. The fixing portion is connected to the fixing member. The fixing member is connected with a fixed object. The coupling member is selectively connected to either a movable loading object, a sliding member, or a cable management arm. Thereby, the cable management arm extends along with the movement of the loading object or the sliding member so that one end of the supporting frame is extendable and the weight of the cable management arm is carried by the supporting frame.

Abstract: A locating structure for a slide assembly includes a first track, a second track, a releasing member, and a locating member; a locating tab is provided at a front end of the first track; the second track is inserted and connected onto the first track to slide thereon; the second track is provided with a locating portion; the releasing member is mounted to an inner side of the second track; one end of the releasing member is provided with an operation button; the locating member is located on one side of the operation button and has a propped portion and a plunged portion; the locating member provides resilience for the propped portion to hold against the locating portion of the second track; and the locating member drives the propped portion to disengage from the locating portion by means of the plunged portion.

Abstract: A fast detachable slide bracket includes a frame, a resilient latching member, and a linkage. A folded plate having a through hole is disposed at one end of the frame. The resilient latching member has a first end and a second end opposite to each other. The section between the first end and the second end is pivotally connected to the frame. The first end is relatively disposed to and separated from the folded plate for a proper range. The linkage has a first end and a second end opposite to each other. The first end of the linkage penetrates the through hold of the folded plate of the frame and the second end of the linkage links the latching member to raise the second end of the latching member thus to move the first end of the latching member to release the bracket from a support temporarily.

Abstract: A drawer slide locating system includes an outer rail having a bracket at its front end, an inner rail, and a bearing carrier disposed between the inner rail and the outer rail. The bracket contains a locking piece toward the bearing carrier. Two wings extend from both sides of the locking piece to define a leverage axis. A slot is disposed on the outer rail. The locking piece having one lower end adapted with a hooking portion and another end being held against by the bearing carrier. The hooking portion raises to hold against the bottom of the bearing carrier and secure the bearing carrier in place.

Abstract: A slide assembly may be associated with a foldable cable management arm. The slide assembly includes inner and outer rails. The inner rail is slidable in the outer rail. The inner rail includes a ball bearing carrier disposed close to an end of the inner rail. The ball bearing carrier includes upper and lower ball receiving channels. The inner rail may be directly provided with the upper and the lower ball receiving channels and the ball bearings. Each of the upper and the lower ball receiving channels includes an open section positioned in use facing the outer rail. A plurality of ball bearings are contained in both the upper and the lower ball receiving channels and roll along the open sections of the upper and the lower ball receiving channels to support the outer rail.

Abstract: A slide assembly for a rack includes a second slide member slidably connected to a first slide member, which includes a base at one end thereof; a first bracket fixedly connected to the first slide member, which includes a first supporting member corresponding to the base, the first supporting member having a slot thereon; an engaging member pivotally connected to the base, which includes an engaging portion having an engaging surface; an operating member connected to the engaging member for controlling movement of the engaging member; and a resilient member acting on the engaging member for providing a restoring force to the engaging member. When the first bracket is mounted to a rack, the engaging portion of the engaging member will be inserted through the slot of the first bracket and the engaging surface will engage with a surrounding surface of a hole of the rack.

Abstract: A latch and release device of a slide assembly includes a resilient catch, a press button, and a mounting base. The resilient catch has a first end and a second end opposite to each other and a locking portion. The first end of the resilient catch is fixed to the slide assembly. The locking portion prevents the slide assembly from extending. The press button is disposed with a locating hole. The mounting base has a chamber to receive the press button and allow the press button to slide therein. The mounting base is disposed with an opening corresponding in position to the locating hole of the press button for the second end of the resilient catch to penetrate through the opening and to be secured in the locating hole of the press button.

Abstract: A method for compressing image data is used to process image data. The method includes the following steps as sampling pixels expressing an image, transforming the sampling data into transformed data by forward discrete cosine transformation, quantifying the transformed data according to a quantification table into quantified data, encoding the quantified data according to Huffman table, and generating a frame data. When the frame data is processed along the reverse pipeline, the frame data is decompressed to the image data.

Abstract: A portable audio recording and playback system is provided. The portable audio recording and playback system can synchronously display the corresponding lyrics or character contents, and it also can selectively record user's voice or the mixed signal of the user's voice and a background music including music and a human voice of singer during playback. Or the volume of the human voice in the background music can be increased or decreased corresponding to that of the music and be outputted or repeatedly played with changing speech speed without the tone changed for achieving the effects of on-the-go vocal and/or music accompaniment, voice recording, and language learning with changing speech speed without the tone changed.

Abstract: A locating structure for a slide assembly includes a first track, a second track, a releasing member, and a locating member; a locating tab is provided at a front end of the first track; the second track is inserted and connected onto the first track to slide thereon; the second track is provided with a locating portion; the releasing member is mounted to an inner side of the second track; one end of the releasing member is provided with an operation button; the locating member is located on one side of the operation button and has a propped portion and a plunged portion; the locating member provides resilience for the propped portion to hold against the locating portion of the second track; and the locating member drives the propped portion to disengage from the locating portion by means of the plunged portion.

Abstract: A cable management arm supporting device includes an extendable supporting frame which has a first and second frames, a fixing member and a coupling member. The first frame has a pivotal portion and a casing portion. The second frame has an inserting portion and a fixing portion. The inserting portion is connected to the casing portion. The pivotal portion is connected to the coupling member. The fixing portion is connected to the fixing member. The fixing member is connected with a fixed object. The coupling member is selectively connected to either a movable loading object, a sliding member, or a cable management arm. Thereby, the cable management arm extends along with the movement of the loading object or the sliding member so that one end of the supporting frame is extendable and the weight of the cable management arm is carried by the supporting frame.

Abstract: A fast detachable slide bracket includes a frame, a resilient latching member, and a linkage. A folded plate having a through hole is disposed at one end of the frame. The resilient latching member has a first end and a second end opposite to each other. The section between the first end and the second end is pivotally connected to the frame. The first end is relatively disposed to and separated from the folded plate for a proper range. The linkage has a first end and a second end opposite to each other. The first end of the linkage penetrates the through hold of the folded plate of the frame and the second end of the linkage links the latching member to raise the second end of the latching member thus to move the first end of the latching member to release the bracket from a support temporarily.

Abstract: A latch and release device of a slide assembly includes a resilient catch, a press button, and a mounting base. The resilient catch has a first end and a second end opposite to each other and a locking portion. The first end of the resilient catch is fixed to the slide assembly. The locking portion prevents the slide assembly from extending. The press button is disposed with a locating hole. The mounting base has a chamber to receive the press button and allow the press button to slide therein. The mounting base is disposed with an opening corresponding in position to the locating hole of the press button for the second end of the resilient catch to penetrate through the opening and to be secured in the locating hole of the press button.

Abstract: A supporting structure for a slide assembly is applied to combination of a slide assembly and a foldable cable management arm. The slide assembly includes inner and outer rails. The inner rail slides in the outer rail. The inner rail contains a ball bearing disposed close to a terminal end of the inner rail. The ball bearing includes upper and lower ball channels and a plurality of balls. The inner rail may be directly disposed with the upper and the lower ball channels and the balls. Each of the upper and the lower ball channels is disposed with an open section relatively to the outer rail. The balls are contained in both the upper and the lower ball channels and roll around the open sections of the upper and the lower ball channels to relatively support the outer rail.

Abstract: A drawer slide locating system includes an outer rail having a bracket at its front end, an inner rail, and a bearing carrier disposed between the inner rail and the outer rail. The bracket contains a locking piece toward the bearing carrier. Two wings extend from both sides of the locking piece to define a leverage axis. A slot is disposed on the outer rail. The locking piece having one lower end adapted with a hooking portion and another end being held against by the bearing carrier. The hooking portion raises to hold against the bottom of the bearing carrier and secure the bearing carrier in place.

Abstract: A heat dissipating and power cutting-off device of a pump has a heat dissipating ceramics ring fitted in a plastic member to form watertight connection in between to prevent water from flowing to a motor. The plastic member has a pivotal hole for a main blade wheel connected to a shaft of the motor, and for a shaft seal tightly fitted in same and said ceramics ring. The ring has an annular trench forming between on outer and an inner annular portions for increasing contact area with water so that heat passing through said ring can be dissipated to prevent plastic member from getting melted by said heat. A power cutting-off member is connected to the motor, and has a sensing element abutting the ceramics ring to sense a temperature of same for activation of the cutting-off member when a racing of the motor occurs to cause temperature of both the motor and the ring to rise.