Patents by Inventor Robert B. Page

Robert B. Page has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Discharge lamp assembly
    Patent number: 4771207
    Abstract: In double ended high pressure discharge lamps such as are used in sealed beam reflectors the leads pass through the reflector bowl close to the axis thereof and close to each other giving risk of flashover therebetween, particularly with the high voltages required for hot restarting. To reduce such effects at least one of the leads has a length forming part of a circle terminating at one end and a sleeve of insulating refractory material conforming generally to the same circle is fitted to at least part of the circular part.
    Type: Grant
    Filed: November 13, 1986
    Date of Patent: September 13, 1988
    Assignee: Thorn EMI plc
    Inventor: Robert B. Page
  • Mercury-metal halide discharge lamp
    Patent number: 4247798
    Abstract: Metal halide discharge lamps based on sodium and scandium iodides show improved color rendering without important loss of efficacy by the inclusion of lithium iodide, especially in the molar proportion of 10-50% LiI based on the total of Li, Na and Sc iodides. The ratio of alkali metal of SC iodides should be between 5.4:1 and 57.5:1. Especially preferred are lamps with less than 10 molar % ScI and the lamps may additionally contain caesium iodide to broaden the emission spectrum.
    Type: Grant
    Filed: April 3, 1979
    Date of Patent: January 27, 1981
    Assignee: Thorn Emi Limited
    Inventors: Stephen H. Howe, Barry Preston, Robert B. Page