Patents by Inventor Jack Brett

Jack Brett 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).

  • High emissivity filament for energy conserving incandescent lamps with infrared radiation returning envelopes
    Patent number: 4283653
    Abstract: An incandescent lamp having a coating thereon which returns infrared energy to the filament to decrease the amount of power consumed by the lamp in order to maintain the filament at a predetermined operating temperature has a predetermined fractional spacing between turns which results in an emissivity greater than 0.5 at 2,000.degree. K. The filament also has a predetermined length to diameter ratio to make it compact and thereby improve its emissivity and the capture of the reflected infrared radiation and to reduce aberration losses. The filament can be a coiled coil or triple coiled coil and can be stabilized by secondary recrystallization.
    Type: Grant
    Filed: September 17, 1979
    Date of Patent: August 11, 1981
    Assignee: Duro-Test Corporation
    Inventor: Jack Brett