91results about How to "High mechanical precision" patented technology

A high-precision cylindrical coil having a high-precision fine coil pattern and a high mechanical precision such as fine roundness and no axial runout, and a cylindrical micrometer using the cylindrical coil are provided.In a cylindrical coil, a plurality of layers of coil patterns formed by filling the coil pattern grooves formed on a cylindrical substrate with a conductor and a plurality of insulating layers coating the cylindrical substrate are formed, the layers of coil patterns are electrically interconnected to each other by filling a through-hole formed by performing a hole forming process with a conductor, and the outmost layer is made of an insulating material.

A spindle direction engaging device moves at least one of spindles in a mutually separating direction to closely engage a lock piece or a lock portion in a spindle direction of spindles while the lock piece is locked to the lock portion when a tire is not mounted. A second spindle includes a groove extending in a peripheral direction along an outer periphery thereof in sliding contact with the lock piece; sliding surfaces of the lock piece and the groove are receiving portions formed as flat surfaces to receive separating forces acting on both the spindles. A correction device corrects a gap between an inner ring of the spindle bearing and rolling elements of the spindle bearing, or a gap between an outer ring of the spindle bearing and the rolling elements of the spindle bearing, while the spindle is rotating. Preload bolts include a coolant passage formed by hollowing a corresponding portion passing a mounting hole of a detector, and a coolant can thus be supplied to the coolant passage.

Axial engagement means is provided in a tire testing machine. While a tire (T) is not installed, the axial engagement means moves at least either of spindles in the direction to separate them from each other with a lock member (18) engaged with an engaged section (40), the axial engagement means thereby causing the lock member (18) and the engagement section (40) to be engaged in a tightly contacting manner in the axial direction of the spindles. A second spindle (59) has a groove (71) extended in its periphery, in its circumferential direction, and in sliding contact with a lock member (60). The sliding surface between the lock member (60) and groove (71) functions as a receiving section (85) formed in a flat surface so as to receive a separating force between the spindles. A correction device is provided in the tire testing device, and when a spindle (17) rotates, the correction device corrects the gap between an inner ring of a spindle bearing and rolling bodies of the bearing or the gap between an outer ring of the spindle bearing and the rolling bodies. A refrigerant path (219) is provided in a preload bolt (202). The refrigerant path (219) is a hollow region passing that portion of the bolt which corresponds to at least an installation hole (209) of a detector (208), and a refrigerant can be supplied to the refrigerant path (219).

A probe card assembly has a probe contactor substrate having a plurality of probe contactor tips thereon and a probe card wiring board with an interposer disposed between the two. Support posts contacting the probe contactor substrate are vertically adjustable until secured by a locking mechanism which is coupled to the probe card wiring board. When the posts are secured in a fixed position, the position is one in which the plane of the plurality of probe contactor substrates is substantially parallel to a predetermined reference plane.

An image display device of a high quality, in which the variation of heights between adjoining spacers is reduced by measuring the heights of spacers to arrange the spacers from the end in the sequential order of heights so that the mechanical precision of the spacers need not be strictly managed.

The invention relates to a arrangement for feeding a centrally focused reflector antenna, comprising a waveguide (1), a dielectric field transformer (2) arranged on said waveguide (1) and a mounting platform (3) for a series of modules (8) which is embodied on one end of the waveguide (1) The waveguide (1) is provided with a means for receiving the dielectric field transformer (2) which partially protrudes into the waveguide (1). In a preferred embodiment, a dielectric support (9) is provided in the vicinity of the dielectric field transformer (2). The middle of said support has a circular bore (12) whose diameter corresponds to the diameter of the dielectric fields transformer (2). One advantage of the invention is that the centrally focused reflector antennae can be excited in the focal point thereof in a field-optimum broadband manner. No mechanically displaced components are required as a result of the dielectric fields transformer. The inventive device can be produced in a cost-effective manner with high mechanical precision and little effort. It is characterized by high tolerance with respect to various environmental conditions such as temperature, humidity of the air and aggressive media.An arrangement for feeding a centrally focused reflector antenna includes a waveguide (1), a dielectric field transformer (2) arranged on the waveguide (1) and a mounting platform (3) for a series of modules (8) which is embodied on one end of the waveguide (1). The waveguide (1) is provided with an arrangement for receiving the dielectric field transformer (2) which partially protrudes into the waveguide (1). Preferably, a dielectric support (9) may be provided in the vicinity of the dielectric field transformer (2). The middle of the support has a circular bore (12) whose diameter corresponds to the diameter of the dielectric field transformer (2). The centrally focused reflector antenna can be excited in the focal point thereof in a field-optimum broadband manner.

The invention discloses a deproteinised natural rubber preparation method including the following steps: 1) adding a stabilizer in a fresh natural rubber latex or a concentrated natural rubber latex for stabilizing; 2) adding deionized water to dilute the rubber latex, carrying out centrifugal separation to remove impurities, and collecting an upper rubber phase; 3) diluting the upper rubber phase obtained in the step 2) with deionized water, adding a compound enzyme preparation under stirring and weak alkali conditions, and degrading proteins in the rubber latex under certain reaction conditions; and 4) carrying out centrifugal separation with a centrifugal machine to remove impurities obtained after the proteins are degraded, carrying out repeated degradation to remove the proteins contained in the latex, and thus obtaining deproteinised natural rubber. In addition, the invention also discloses the deproteinised natural rubber prepared by the method. The content of protein amino acids of the deproteinised natural rubber can reach less than a 0.67 ppm reagent detection limit value, and the deproteinised natural rubber can be used in production of various medical latex products and can avoid generation of allergy caused by natural rubber.

The invention provides a series-parallel minimally invasive surgery mechanical arm with five degrees of freedom. The series-parallel minimally invasive surgery mechanical arm with five degrees of freedom comprises a main fixed platform, a main movable platform, a reversing fixed platform and a working movable platform; the main fixed platform and the main movable platform are connected by use of three first motion branch chains with the same structure to form a first closed-loop parallel structure with three degrees of freedom; the reversing fixed platform and the working movable platform are connected by use of three second motion branch chains with the same structure to form a second closed-loop parallel structure with three degrees of freedom; the two closed-loop parallel structures with three degrees of freedom are connected in series to form the series-parallel minimally invasive surgery mechanical arm with five degrees of freedom. According to the series-parallel minimally invasive surgery mechanical arm with five degrees of freedom, the movement of the working movable platform in the three-dimensional space is realized by changing the included angles between three driving arms and the main fixed platform by use of three first driving motors; the reversal motion of the working movable platform is realized by changing the extension quantity of three linear driving rods by use of three second driving motors; five degrees of freedom can be provided for a surgical instrument; the mechanical arm is suitable for assisting a doctor to finish high-precision and high-difficulty minimally invasive surgeries.