Patents Assigned to Randtron
  • Cavity-backed slot antenna
    Patent number: 6160522
    Abstract: A cavity backed slot antenna comprises a conductive cavity, a conductive film carried by a thin dielectric substrate which is above the cavity. The conductive film includes one or more slots which an electric field is applied to radiate an electromagnetic energy.
    Type: Grant
    Filed: April 2, 1998
    Date of Patent: December 12, 2000
    Assignee: L3 Communications Corporation, Randtron Antenna Systems Division
    Inventor: Gary S. Sanford
  • Coaxial rotary coupler
    Patent number: 6064288
    Abstract: A coaxial rotary coupler assembly which includes a coaxial transmission region for transmitting RF energy between a stationary and rotating section of the rotary coupler. Compact stubs are associated with the input and output connections to associated input and output transmission lines. Stepped impedance chokes are formed between fixed and rotating portions of the outer and inner coaxial conductors of the rotary transmission line sections.
    Type: Grant
    Filed: July 17, 1998
    Date of Patent: May 16, 2000
    Assignee: L3 Communications Corp., Randtron Antenna Systems Division
    Inventors: Douglas A. Norman, James P. Scherer
  • Replaceable pulley lagging
    Patent number: 4284409
    Abstract: Replaceable pulley lagging--for an initially smooth-faced, endless conveyor or elevator belt drive pulley--comprising a multiplicity of relatively narrow, transversely extending traction pads pre-formed to mate with the arcuate pulley face, and applied edge to edge in a circumferential array and number to substantially fully embrace the face of the pulley; the traction pads being secured to the face of the pulley in detachable relation whereby to permit removal and replacement of said pads when worn or damaged.
    Type: Grant
    Filed: August 27, 1979
    Date of Patent: August 18, 1981
    Assignee: Randtron
    Inventor: David A. Van Teslaar