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    • 3. 发明专利
    • Improvements in gauges for measuring or comparing diameters of cylindrical bodies
    • GB706210A
    • 1954-03-24
    • GB1658651
    • 1951-07-12
    • JOHN RAEBLAXLAND RAE PTY LTD
    • G01B5/08
    • 706,210. Linear-dimension gauges. RAE, J., and BLAXLAND RAE, PTY., Ltd. July 12, 1951 [July 14, 1950], No. 16586/51. Class 106 (2) A gauge for measuring and comparing internal or external diameters of cylindrical bodies comprises a ring having a contact diameter slightly larger than the diameter to be gauged, the ring having an arcuate work engaging face and having a substantial depth relative to its radial thickness so that it is flexible in its own plane and substantially inflexible in any other plane. Fig. 10 shows in cross section an example of a ring 26 for gauging bore holes, the ring having a known outer diameter that is slightly greater than the diameter of the bore hole. On forcing the ring into the bore hole the ring assumes an elliptical shape in a plane inclined at an angle to the plane normal to the longitudinal axis of the bore hole. This angle is a measure of the diameter of the bore hole. The ring 26, Fig. 7, may be rotatably held in a shouldered recess 30, Fig. 5, formed on the periphery of a disc shaped plate 31, by the heads of four screws (not shown) screwed into the holes 32. The circle joining the outer edges of the four screw heads is less than the external diameter of the ring 26. The diameter of the recess 30 is less than the undistorted internal diameter of the ring 26 to permit reduction in the ring diameter when distorted. A bubble vial V, Fig. 13, may be provided at the end of a handle 33 secured to the plate 31 for use in determining the angle of tilt of the ring 26 in the bore C. Fig. 11 shows in cross section an example of a ring 18 for gauging external diameters of cylinders, the ring having an internal diameter slightly greater than the diameter to be gauged. If the ring is caused to closely embrace the cylinder being gauged the ring will assume an elliptical form and the inclination of the plane of the ring to the plane that is normal to the axis of the cylinder is a measure of the diameter of the cylinder being gauged. Figs. 1 and 2 show a holder 15 for the ring 18. The ring 18, Fig. 3, is held in a recess 19 in the holder 15 by retaining washers on screws (not shown) located in threaded holes 20. The diameter of the groove 19 is greater than the undistorted external diameter of the ring 18 so as to accommodate the elliptical shape assumed by the ring when it is distorted. A bubble vial 17 is preferably mounted in a projection 16 of the holder 15 to assist in determining the inclination of the ring 18 when gauging the diameter of a cylinder.
    • 4. 发明专利
    • Improvements in or relating to extrusion presses
    • GB646296A
    • 1950-11-22
    • GB2792747
    • 1947-10-18
    • MCKECHNIE BROTHERS LTDJOHN RAE JUNIORALBERT HAROLD DUKES
    • B21C47/04
    • 646,296. Extruding. McKECHNIE BROS., Ltd., RAE, J., and DUKES, A. H. Oct. 18, 1947, No. 27927. [Class 83 (iv)] A press for extruding rod, shaped strip or like stock is associated with coiling means comprising a rotatable pan within which a removable coil holder is concentrically mounted, the strip being guided from the press by means of a shoot which delivers it tangentially into the annular space between the pan and the coil holder. A pan 1 is keyed to a vertical spindle 2 driven by an electric motor 3. Within the pan is a removable coil-holder 7, 8 adapted to rotate with the pan. The extruded product is led tangentially into the space between the pan wall and the hub 7 of the coil holder by a shoot 10 preferably of rectangular crosssection which may be downwardly inclined or which, as shown may have a hinged flap 11 to direct the work towards the bottom of the pan. The speed of the pan is adjusted so that the coils do not touch either the pan wall or the hub 7 of the coil-holder. Preferably the crosssectional dimensions of the shoot are considerably larger than those of the extruded stock.
    • 6. 发明专利
    • An improved instrument or gauge for use in facilitating the turning or machining of certain metal components also applicable for detecting hidden faults in metal components
    • GB565561A
    • 1944-11-16
    • GB1676441
    • 1941-12-30
    • JOHN RAE PARK
    • G01B7/312G01N27/90
    • 565,561. Magnetic tests and measurements. PARK, J. R. Dec. 30, 1941, No. 16764. [Class 37] [Also in Group XXII] A cylindrical body of magnetic material surrounded by a layer of non-magnetic material of uniform thickness is manufactured by a method involving the machining of the layer after positioning the metal body for machining under the control of. an electric gauge. The gauge shown in Fig. 3 comprises an E-shaped laminated core 10, which has a primary coil 14 and a secondary coil 15 mounted on its middle leg, the whole being embedded in wax or pitch in a non-magnetic casing 16. The leads to the boils pass out through a tubular handle 18, the primary winding 14 being connected to an A.C. supply 19, Fig. 4, and the secondary coil 15 being connected through a rectifier. 20 to the grid of an amplifier valve 21. The anode of this valve is connected to a micro-ammeter 22. The gauge is shown in Fig. 3 arranged for testing a bearing bush such as is used on aero engines and which comprises a steel tube 24 covered both outside and inside by white metal 25, 26. The bush is set up in a chuck 27 and the gauge is mounted in the tool holder 28 so that the exposed ends of the core 10 lie close to the outer layer 25 of white metal, the magnetic circuit being closed through the steel tube 24. Variations in the air-gap due to eccentricity of the tube 24 on slow rotation of the chuck produce changes in the magnetic field, which are measured by the instrument 22. The bush is then adjusted in the chuck until the tube 24 is truly coaxial and the inner and outer layers 26, 25 of white metal are machined to a uniform thickness.