Abstract: A keyswitch includes a board, a cap located above the board, a membrane circuit board disposed on the board to make first and second engaging structures of the board protrude from first and second holes of the membrane circuit board respectively, and a lifting device. The lifting device is connected to the cap and the board and includes first and second support members. The first support member is movably connected to the cap and has a pivot end portion. The pivot end portion is movably connected to the first and second engaging structures and has a first abutting portion extending toward edges of the first and second holes along a pivot axis of the first engaging structure. The first abutting portion abuts on the membrane circuit board. The second support member rotatably intersects with the first support member and is movably connected to the cap and the board.

Abstract: A combined sedimentation and pressure floatation wastewater treatment tank includes a tank body, a sedimentation treatment device and a pressure floatation treatment device. The tank body contains a predetermined amount of wastewater for treatment. The sedimentation treatment device is operated to remove relatively heavier sludge from the wastewater by sedimentation treatment, and the pressure floatation treatment device is operated to remove relatively lighter sludge from the initially treated wastewater by pressure floatation treatment. In operation, the wastewater is initially treated by the sedimentation treatment device and is further treated by the pressure floatation treatment device. Alternatively, the wastewater is initially treated by the pressure floatation treatment device and is further treated by the sedimentation treatment device.

Abstract: A combined sedimentation and pressure floatation wastewater treatment tank includes a tank body, a sedimentation treatment device and a pressure floatation treatment device. The tank body contains a predetermined amount of wastewater for treatment. The sedimentation treatment device is used to remove relatively heavier sludge from the wastewater by sedimentation treatment, and the pressure floatation treatment device is used to remove relatively lighter sludge from the initially treated wastewater by pressure floatation treatment. In operation, the wastewater is initially treated by the sedimentation treatment device and is further treated by the pressure floatation treatment device. Alternatively, the wastewater is initially treated by the pressure floatation treatment device and is further treated by the sedimentation treatment device.

Abstract: A combined sedimentation and pressure floatation wastewater treatment tank includes a tank body, a sedimentation treatment device and a pressure floatation treatment device. The tank body contains a predetermined amount of wastewater for treatment. The sedimentation treatment device is operated to remove relatively heavier sludge from the wastewater by sedimentation treatment, and the pressure floatation treatment device is operated to remove relatively lighter sludge from the initially treated wastewater by pressure floatation treatment. In operation, the wastewater is initially treated by the sedimentation treatment device and is further treated by the pressure floatation treatment device. Alternatively, the wastewater is initially treated by the pressure floatation treatment device and is further treated by the sedimentation treatment device.

Abstract: A combined sedimentation and pressure floatation wastewater treatment tank includes a tank body, a sedimentation treatment device and a pressure floatation treatment device. The tank body contains a predetermined amount of wastewater for treatment. The sedimentation treatment device is used to remove relatively heavier sludge from the wastewater by means of sedimentation treatment and the pressure floatation treatment device is used to remove relatively lighter sludge from the initially treated wastewater by means of pressure floatation treatment. In operation, the wastewater is initially treated by the sedimentation treatment device and is further treated by the pressure floatation treatment device. Alternatively, the wastewater is initially treated by the pressure floatation treatment device and is further treated by the sedimentation treatment device.

Abstract: A cordless window covering system with a secondary mechanism to adjust the position of the window covering, to allow manual adjustment of the window covering when the bottom bar is out of reach by hand. In one embodiment, the secondary adjustment system includes a hooked hand tool that engages with a loop in the bottom bar. In another embodiment, the secondary adjustment system includes an exposed beaded corded coupled to the internal mechanisms of the system, so that pulling of beaded cord causes internal mechanisms to move and adjust the position of the window covering.

Abstract: The present invention relates to a foldable honeycomb structure and method for making the same. The method comprises (a) providing a plurality of flat strips; (b) forming a pair of longitudinal creases in each strip thereby defining the first two longitudinal margins of each strip and a central portion of each strip between the creases; (c) folding each strip along said creases so that each folded strip has two exposed outside surfaces; (d) applying at least three longitudinal glue lines to the exposed outside surface of each folded strip; and (e) stacking the glued strips. As a result, it need not open the longitudinal margins during the process of applying the longitudinal glue lines, which can avoid the deformation of the strip and have a precise gluing position.

Abstract: A window covering system with geared interconnecting mechanism for raising and lowering window shade cordlessly. The window covering system may have at least one lifting cord, at least one connecting cord, an elongated member having a channel, and window covering member which may be a shade, a blind, or other known window covering designs. The contemplated device has at least one spring-actuated rotary element coupled to a spring and having a spool capable of winding and storing at least one connecting cord. The rotary elements are interconnected with gears for precision rotation, and are contained within a receptacle detachably received within the channel of the elongated member. This window covering system may optionally include a rotor set having rotors optionally interconnected by gears.

Abstract: The present invention relates to a foldable honeycomb structure and method for making the same. The method comprises (a) providing a plurality of flat strips; (b) forming a pair of longitudinal creases in each strip thereby defining the first two longitudinal margins of each strip and a central portion of each strip between the creases; (c) folding each strip along said creases so that each folded strip has two exposed outside surfaces; (d) applying at least three longitudinal glue lines to the exposed outside surface of each folded strip; and (e) stacking the glued strips. As a result, it need not open the longitudinal margins during the process of applying the longitudinal glue lines, which can avoid the deformation of the strip and have a precise gluing position.