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US 4,356,868 AGranted
Fire-extinguishant system
AssigneeRansburg Corporation
InventorsStanley L. Bentley, Frank A. Bloomer
Life of this patent
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AssigneeRansburg Corporation
InventorsStanley L. Bentley, Frank A. Bloomer
Estimating the term…
A fire-extinguishant system includes a source of extinguishant, such as carbon dioxide, a fusible length of plastic tubing, such as one-half-inch-outside-diameter polyethylene tubing, with the end closed, and a conduit and valve system for connecting the extinguishant source to the fusible tubing. The valving system pressurizes the fusible tubing at a low pressure, and this low-pressure signal is coupled to a pilot input port in the valve system. When this low-pressure pilot signal is interrupted, the piloted valve switches to supply extinguishant at full pressure through the fusible tubing. If the fusible tubing has been melted, such as by a fire, the extinguishant exits through the melted portion to extinguish the fire. The low-pressure pilot signal can, however, be interrupted manually by the valve system. In this case, the full-pressure extinguishant supply to the fusible tube ruptures the tube and releases extinguishant. This provides a manual extinguishant control for the system.
In a material coating system including a device for dispensing coating material, a source of high magnitude electrostatic potential, means for coupling a portion of the device to the high potential source, means for insulating said device portion from ground potential to prevent discharge of said portion, a target to be coated by dispensed coating material from the device, and means for maintaining the target at a low magnitude potential relative to the source potential;
A fire extinguishant system comprising a source of fire extinguishant, a fusible means for stopping the flow of extinguishant from the source and for permitting such flow when melted by the heat of a fire, and means for coupling the fusible means to the source of fire extinguishant, the fusible means including a conduit across the wall of which a pressure differential is established, and the means for coupling the fusible means to the extinguishant source comprising a pressure change actuated valve for switching to provide an extinguishant flow path from the extinguishant source to the fusible means when the fusible means melts to change the pressure in the conduit, and means for providing the pressure differential across the wall of the conduit, the pressure differential providing means comprising a pressure regulator having an input and an output, means for coupling the pressure regulator input to the extinguishant source, a selectively controllable multiple position valve having an input, means coupling said multiple position valve input to the output of said pressure regulator, a first output, a first position of said multiple position valve coupling said first output to said fusible means to pressurize said conduit, said multiple position valve having a second position uncoupling said regulator output from said fusible means and venting said conduit to disrupt the pressure differential across the wall thereof and trigger said pressure change actuated valve to switch to provide an extinguishant flow path from said extinguishant source to said fusible means, pressure of extinguishant from said source through said pressure change actuated valve rupturing the wall of said conduit to provide a flow of extinguishant.
A fire-extinguishing system comprising:
A fire-extinguishing system comprising a source of fire extinguishant maintained at an elevated pressure, first and second conduits, and means coupling the first and second conduits to the source of fire extinguishant, regulator means for reducing the pressure of the extinguishant, the regulator means in the first conduit, a fusible conduit for containing extinguishant at a reduced pressure in the vicinity of a possible source of fire, and means for coupling the fusible conduit to the regulator means, a pressure change-actuated valve and means for coupling the pressure change-actuated valve to the fusible conduit and to the source of fire extinguishant through the second conduit, the pressure change-actuated valve being responsive to a drop in pressure in the fusible conduit for switching to provide a flow path of extinguishant at the elevated pressure of the source through the fusible conduit, a manually operable valve, means for coupling the manually operated valve to the fusible conduit for venting said conduit and thereby triggering said pressure change-actuated valve, the pressure of the extinguishant admitted through the pressure change-actuated valve to the fusible conduit and the strength of the fusible conduit being such as will cause the fusible conduit to rupture to provide a flow of extinguishant, a second pressure change-actuated valve, means for coupling the second pressure change-actuated valve to the second conduit, a second source of extinguishant, means for coupling the second extinguishant source to the second pressure change-actuated valve, an additional extinguishant distribution means, and means for coupling the additional extinguishant distribution means to the second source of extinguishant through the second pressure change-actuated valve such that a change in pressure of the extinguishant in the second conduit triggers the distribution of extinguishant from the second source through the additional extinguishant distribution means.
In a material-coating system including a device for dispensing coating material and a target to be coated by material dispensed from the device, and means for maintaining an electrostatic potential difference across the device-target spacing, a fire extinguishant system comprising a source of fire extinguishant, a fusible means for stopping the flow of extinguishant from the source and for permitting such flow when melted by the heat of a fire, means for mounting the fusible means adjacent the material-coating system, and means for coupling the fusible means to the source of fire extinguishant, the fusible means including a conduit across the wall of which a pressure differential is established, and the means for coupling the fusible means to the extinguishant source comprising a pressure change actuated valve for switching to provide an extinguishant flow path from the extinguishant source to the fusible means when the fusible means melts to change the pressure in the conduit.
Dependencies are inferred from the claim text.