Patents Assigned to RTR Incorporated
  • Fuel oil level measuring apparatus
    Patent number: 4084436
    Abstract: An apparatus for indicating the level of fuel in a fuel oil storage tank including a vertically positioned tube having a multiplicity of longitudinally spaced and movable floats therein and a multiplicity of associated reed switches and resistors positioned on the outside of the tube and spaced from each other. The switches are actuated by magnets on the associated floats, which rise and fall with the fuel level, and shunt varying amounts of current by the resistors so that a fuel level readout can be obtained on a meter.
    Type: Grant
    Filed: December 1, 1975
    Date of Patent: April 18, 1978
    Assignee: RTR Incorporated
    Inventor: Ray C. Smitherman