Abstract: The present invention is related to an electromagnetic noise filter device and an equivalent filter circuit thereof. The filter device comprises a substrate, a transmission line and a ground plane having slotted ground structure. The transmission line is configured on the top surface of the substrate, and the grounding plane is configured on the bottom surface of the substrate. At least one pair of impedance elements are configured within the slotted ground structure. The transmission line can be electromagnetic coupled to the slotted ground structure and the impedance elements so as to form an equivalent filter circuit. Thereby, the electromagnetic noises on at least one specific frequency may be absorbed by the impedance elements of the filter device so as to avoid the electromagnetic reflection induced by the electromagnetic noise and interfering the signal transmitted on the transmission line.

Abstract: The present invention is related to an electromagnetic noise filter device and an equivalent filter circuit thereof. The filter device comprises a substrate, a transmission line and a ground plane having slotted ground structure. The transmission line is configured on the top surface of the substrate, and the grounding plane is configured on the bottom surface of the substrate. At least one pair of impedance elements are configured within the slotted ground structure. The transmission line can be electromagnetic coupled to the slotted ground structure and the impedance elements so as to form an equivalent filter circuit. Thereby, the electromagnetic noises on at least one specific frequency may be absorbed by the impedance elements of the filter device so as to avoid the electromagnetic reflection induced by the electromagnetic noise and interfering the signal transmitted on the transmission line.

Abstract: A clamp device clamps together two panels having aligned receiving holes, and includes a tubular wall adapted to be inserted into the aligned receiving holes and having a through hole, first and second abutment plates connected hingedly and oppositely to the tubular wall within the through hole, first and second clamping plates projecting transversely and respectively from the first and second abutment plates, two resilient arms projecting from the second abutment plate and respectively having engaging ends, and a locker having two groove sidewalls formed on the first abutment plate and confining a groove therebetween. The clamping plates move away from each other to a clamping position when the abutment plates abut against the tubular wall. The groove receives and locks the engaging ends when the abutment plates abut against the tubular wall, thereby locking the clamping plates in the clamping position.

Abstract: A window covering support rack includes an elongate rod having opposite ends mounted to and supported by end brackets that are fixed to a wall and an intermediate bracket fixed to the wall between the end brackets and supporting the rod. The intermediate bracket includes an L-shaped plate having an end section fixed to the wall and a horizontal section extending from the rod section and having a free end forming a recess for partially receiving and supporting the rod therein. A retention wall is formed on the horizontal section of the intermediate bracket for stably retaining the rod in the recess. A plurality of hanger rings is fit over and movable along the rod. Each hanger ring has a side opening aligned with the horizontal section of the intermediate bracket to allow the hanger ring to pass over the intermediate bracket.

Abstract: An improved structure of a Venetian blind allows easy operation by having a lift cord to take a turn at where it enters and leaves the head rail and the buttermilk to form a certain support force to hold both of the head rail and the buttermilk in position so that one may forthwith press down or push up either of the head rail and the buttermilk to adjust the height of the blind for admitting or shading the sunlight as desired without leaving the lift cord to drop on the floor area to prevent it from tangling a child.