Patents Assigned to Fawcett Engineering Limited
  • Differential pressure indicators
    Patent number: 4014284
    Abstract: A differential pressure indicator for indicating the degree of contamination of a filter element, has a piston movable against a spring by increasing differential pressure and the piston is connected through a helical constraint to turn a magnetic element as the piston moves. An indicator element is located on the opposite side of a wall from the magnetic element and is magnetically coupled to it and is thereby turned by the first element as the latter turns.
    Type: Grant
    Filed: April 30, 1976
    Date of Patent: March 29, 1977
    Assignee: Fawcett Engineering Limited
    Inventor: Brian Read
  • Differential pressure indicator
    Patent number: 3980040
    Abstract: A differential pressure indicator for indicating the state of a filter element comprises a magnetic piston slidable in a sleeve against a spring and subjected at its opposed faces to the pressures on each side of the filter element. A rod fixed to the piston has steps or projections which can be forced through an expansible collet as the differential pressure increases. The piston thus has a limited number of precise positions which are indicated by an indicator element of magnetic material slidable on a member exterior of the sleeve.
    Type: Grant
    Filed: March 27, 1975
    Date of Patent: September 14, 1976
    Assignee: Fawcett Engineering Limited
    Inventor: Brian Read
  • Filter elements
    Patent number: 3950256
    Abstract: A support structure for a pleated filter element is moulded of nylon and has parallel spaced bars joined at one face by the bases of frusto-conical fingers moulded integrally therewith. During manufacture of the element, the rows of fingers are engaged in the pleats of pleated filter medium from a pleating machine and the assembly is then curved into cylindrical shape.
    Type: Grant
    Filed: April 1, 1974
    Date of Patent: April 13, 1976
    Assignee: Fawcett Engineering Limited
    Inventor: Brian Read