摘要:
A digital, flat panel, two-dimensional x-ray detector moves reliably, safely and conveniently to a variety of positions for different x-ray protocols for a standing, sitting or recumbent patient. The system makes it practical to use the same detector for a number or protocols that otherwise may require different equipment, and takes advantage of desirable characteristics of flat panel digital detectors while alleviating the effects of less desirable characteristics such as high cost, weight and fragility of such detectors.
摘要:
A boat hull configuration that generates lift upon forward movement in the water caused by two lateral side keels that run along either side of the hull, and a bottom surface that joins the two sides keels, wherein the forward portion of the bottom surface has a concave configuration which provides a pivot fulcrum surface, and wherein the forward portions of the keels have an inward slant from the front rearwardly to channel and trap water and air under the hull and result in the development of a force directed upward against the fulcrum surface to produce planing lift during powered forward motion of the boat.
摘要:
A currency stacker-sorter having a movable receiver which receives a bill from a currency validator and carries the bill laterally to a position opposite the inlet of a selected one of a plurality of storage boxes, whereupon a ram mechanism is activated to place the bill into the selected storage box. The currency stacker includes a closed-loop position control system for selectively positioning the receiver mechanism at a desired location, the position control system including an optical encoder for sensing the position of the receiver mechanism relative to the inlets of the storage boxes. The ram mechanism also includes an optical encoder which allows that mechanism to complete a ram sequence in response to a single trigger pulse from the currency validator. Each storage box of the stacker-sorter includes a spring-loaded pressure plate connected to a rear portion of the box through a scissors linkage. Each compartment also includes a compartment FULL switch.
摘要:
An injection moldable, thermally conductive polymer composition that has ultra low CTE properties is provided. The composition is suitable both for substrate applications in high precision electronics assemblies as well as over molding applications in conjunction with ceramic substrates. The composition includes a base polymer matrix material loaded with thermally conductive filler, which imparts thermal conductivity to the polymer matrix while also maintaining or enhancing the dielectric properties of the base polymer. The resultant composition exhibits CTE properties in the range of between 9 ppm/° C. and 2 ppm/° C., exhibits an optical anisotropy of below 1.5, and a thermal conductivity of greater than 2 W/m° K. The composition is suitable for use in over molding applications in conjunction with virtually any suitable electronics substrate material without the introduction of mechanical stresses produced by large CTE differentials.
摘要:
A sizing formulation adapted for use with carbon fiber yarn comprising an aqueous dispersion of a film-forming, heat-reactive resin having a Tg below about -50.degree. C. and a water-dispersible ethoxylated alkyl phenol provides yarn having improved resistance to abrasion, less breakage and low fuzz formation, permitting substantial handling of the fiber in fabrication and weaving operations with reduced losses. In addition, the sizing may be readily removed thermally without the production of noxious byproducts when deemed necessary for use in further processing and impregnation operations.