Patents Assigned to Stone Allen Limited
  • Heating system
    Patent number: 4638767
    Abstract: The invention provides a control system for a set up including a plurality of boilers, in which each boiler is associated with a control valve which permits or prevents flow through the boiler between common flow and return mains and in which each control valve is connected with a corresponding temperature sensor, whereby the control valves are temperature switched. This compares to conventional practice in multiple boilers set-ups where the said valves are time/delay switched.
    Type: Grant
    Filed: July 8, 1985
    Date of Patent: January 27, 1987
    Assignee: Stone Allen Limited
    Inventor: Martin C. J. George