Temperature-responsive apparatus for pressure fluid power shut-off systems for engines, compressors and the like

Claim 1

A TEMPERATURE-RESPONSIVE DEVICE FOR USE IN FLUID PRESSURE POWER SHUT-OFF SYSTEMS OF OPERATING MECHANISMS HAVING PARTS WHICH ARE SUBJECT TO HEAT AND TEMPERATURES ABOVE A PREDETERMINED TEMPERATURE ARE UNSAFE, A TUBULAR BODY HAVING A LONGITUDINAL BORE THEREIN AND ADAPTED TO BE POSITIONED IN A WALL OF SAID HEAT SUBJECT PART WITH ONE END EXTENDING THEREFROM, SAID TUBULAR BODY HAVING MEANS AT SAID ONE END FOR CONNECTION WITH A FLUID PRESSURE DUCT OF SAID SYSTEM, A BLEED PORT IN SAID BODY EXTERIORLY OF SAID WALL AND COMMUNICATING WITH SAID BORE IN SPACED RELATION TO SAID ONE END, SAID BORE HAVING A REDUCED PORTION TERMINATING IN A SHOULDER FACING THEREFROM, A FUSIBLE METAL PLUG IN SAID REDUCED PORTION AND SUBSTANTIALLY CLOSING SAME, AN INTEGRAL ANNULAR FLANGE ON SAID PLUG SEATED AGAINST SAID SHOULDER SEAT, SAID SHOULDER AND FLANGE BEING ARRANGED RELATIVE TO SAID ONE END OF THE BODY WHEREBY THE PRESSURE DIFFERENTIAL BETWEEN THE DUCT AND THE ATMOSPHERE ACTS ON SAID PLUG FLANGE TO URGE SAME AGAINST SAID SHOULDER SEAT, AND CEMENT AROUND SAID FLANGE TO SECURE SAME TO THE BODY AND INSULATE THE FLANGE FROM HEAT CONDUCTED BY THE BODY TO PREVENT SOFTENING OF THE FLANGE AT TEMPERATURES BELOW SAID PREDETERMINED TEMPERATURE.