Abstract: A circulating member for a ball screw is disposed on a nut, the nut is formed with Gothic type threads, and the circulating member of the ball screw is formed with return path for enabling the balls to circulate. The connecting ports at both ends of the return path for connecting the threads of the nut are shaped in Gothic style, thus eliminating the level difference and consequently preventing the balls from being struck and jammed.

Abstract: A ball screw device includes a ball nut having an inner thread formed by a number of helical groove portions for forming an endless ball rolling passage in the ball nut and for receiving a number of bearing members, and an endless spacer moving passage formed in the ball nut and communicating with the endless ball rolling passage of the ball nut for receiving a number of bearing spacers which are engaged between the bearing members for spacing the bearing members away from each other and for preventing the bearing members from striking onto each other. The bearing spacers may be spherical bearing spacers, and made of synthetic materials.

Abstract: A spacer contains a magnetic filler and is disposed between the magnetic conductive balls. The magnetic filler produces an indirect magnetic attractive force on the balls, therefore, when the interval between the two neighboring balls is overlarge, the spacer will not tip over under the effect of gravity or centrifugal force, but will be adsorbed on the balls by the magnetic filler.

Abstract: A circulating member for a ball screw is disposed on a nut, the nut is formed with Gothic type threads, and the circulating member of the ball screw is formed with return path for enabling the balls to circulate. The connecting ports at both ends of the return path for connecting the threads of the nut are shaped in Gothic style, thus eliminating the level difference and consequently preventing the balls from being struck and jammed.

Abstract: A spacer contains a magnetic filler and is disposed between the magnetic conductive balls. The magnetic filler produces an indirect magnetic attractive force on the balls, therefore, when the interval between the two neighboring balls is overlarge, the spacer will not tip over under the effect of gravity or centrifugal force, but will be adsorbed on the balls by the magnetic filler.

Abstract: An automatic transport system having a plurality of stocking centers and a circular transport rail for transporting material items between the centers. The stocking centers are enclosed within the circular transport rail having. Both ends of all stocking centers are close to the circular transport rail and the circular transport rail moves in a fixed direction.

Abstract: A keyboard with a paper holder structure, placed in a sliding mechanical structure below a computer tabletop, comprises a retaining area for accommodating the keyboard, and a paper holder installed on the retaining area for clipping papers above the retaining area to the working space and facilitate users to read the information from the paper at an appropriate distance in order to input the data into the computer accurately.

Abstract: A fry pan with its position angle adjustable includes a body, a tightening device and a base. The body has an upper plate and a lower plate capable of being tightened by the tightening device. The body has a shaft and is pivotally connected to the base by the shaft. The base has a position device connected with the body. The body can be adjusted in its desired position angle by the shaft functioning as a pivot and then is tightened by the position device at the adjusted sloping angle for fat to flow down easily.

Abstract: A keyboard with a paper holder structure, placed in a sliding mechanical structure below a computer tabletop, comprises a retaining area for accommodating the keyboard, and a paper holder installed on the retaining area for clipping papers above the retaining area to the working space and facilitate users to read the information from the paper at an appropriate distance in order to input the data into the computer accurately.

Abstract: A multipurpose massaging apparatus which includes a housing having a top open chamber, a massaging barrel revolvably mounted within the top open chamber of the housing, a motor drive mounted inside the housing and controlled to turn the massaging barrel, a flexible cover fastened to the housing and covered over the rotary massaging elements of the massaging barrel, and two stands pivotably connected to the housing at the bottom side. Then stands support the apparatus on the ground for massaging the sole when they are extended out. The stands can be held in hand when collapsed, so that the apparatus can be moved to massage the body.