Abstract: A vertical calibration method for a wire cut electric discharge machine includes selecting a known altitude for a reference point, marking down four different positions of the upper wire guide of the wire cut electric discharge machine at three different altitudes and repetitively moving the wire of the wire cut electric discharge machine being contact with the reference point, measuring four different displacements of the upper wire guide when being contact with the reference point, establishing an equation by using a principle of triangle, and completing calculation of positions of the upper wire guide and the lower wire guide to finish calibration.

Abstract: In a signal coordinating method and apparatus, a pulse generating circuit receives a VSYNC signal and generates a plurality of critical pulses that define critical time periods from fields can control edges of the VSYNC signal. A determining circuit receives an HSYNC signal and the critical pulses, and generates a trigger signal upon detecting that a line scan control edge of the HSYNC signal appears during one of the critical time periods. A time delay loop introduces a time delay into the VSYNC signal upon receipt of the trigger signal to cause the critical time period to appear after the line scan control edge of the HSYNC signal.

Abstract: A device having legs and a horizontal plate includes two outer legs, two inner legs pivotally disposed between the two outer legs and a plate pivotally disposed between the two inner legs, all of the outer legs, the inner legs and the plate being made by plastic molded injection in a mold simultaneously, each of the outer legs having a first upper hole, a first lower hole and a first slot respectively defined therein, each of the inner legs having a first stud extending therefrom and extending through the first upper hole, a second hole and a second slot respectively defined in each of the inner legs, the plate having a second stud extending laterally therefrom and inserted through the second hole and the first lower hole, a third stud extending laterally from each of the two sides of the plate and inserted through the second slot, a sleeve with a bottom being respectively securely mounted to the first stud and the second stud by threading a bolt therethrough.

Abstract: A teapot with an adjustable tea infuser includes a container having a bottom with a front plate, a rear plate and two side plates extending from four sides of the bottom so as to define an open top, a handle disposed to the rear plate and extending from an upper edge of the rear plate, the handle having at least one notch defined therein, a cover mounted to the container and engaged with the open top, a gap defined between the cover and the handle when the cover mounted to the container, a flexible plate having a first end with a positioning device connected thereto and a second end connected to a tea infuser such that the tea infuser is positioned by adjusting the flexible plate which extends through the gap into the container, and engaging the positioning device with the notch.