Fluidic pressurization control system for chambers

Claim 2

A fluidic control system for controlling changes within an environmental space comprising a rate of environmental change sensing device comprising a capsule externally sensitive to direct environmental changes and internally sensitive to preselectively controlled environmental changes, means for selectively controlling the sensitivity of said capsule to internal environmental changes, a mass balanced beam pivotable responsive to expansion and contraction of said capsule, and fluid-actuated valve means responsive to the movement of said capsule, and hence to the corresponding movement of said mass balanced beam, for producing a fluidic control signal indicative of the rate of environmental change; and control means responsive to said control signal for controlling changes in the environmental space in accordance with said control signal.

Claim 3

A system as claimed in claim 1 wherein said control means includes at least one fluid amplifier having a power nozzle for producing a flow of power fluid, at least one control nozzle for producing a flow of control fluid which interacts with said flow of power fluid from said power nozzle to control the direction of said flow of power fluid with respect to at least one outlet aperture.

Claim 4

A system as claimed in claim 2 wherein said control means includes a chamber, pressure increasing means, pressure decreasing means, means responsive to the flow of power fluid from said outlet aperture, to actuate at least one of said pressure increasing means and said pressure decreasing means to adjust chamber pressure towards a predetermined value.

Claim 5

A system as claimed in claim 2 wherein said fluidic control system comprises a fluid-operated pressure control system for controlling environmental changes within an aircraft cabin.

Claim 6

A system as claimed in claim 2 wherein said fluidic control system comprises a fluid-operated pressure control system for controlling the pressure within a hyperbaric chamber.

Claim 7

A system as claimed in claim 1 wherein said control signal is applied to the control nozzles of a fluid amplifier.

Claim 8

A system as claimed in claim 1 wherein said capsule is adjustably positioned to actuate said valve means at a predetermined pressure.

Claim 9

A fluid-operated pressure control system comprising a chamber, pressure increasing means and pressure decreasing means, a fluid amplifier including a power nozzle for a flow of power fluid, a plurality of outlet apertures for said power fluid, and at least one control nozzle for a flow of control fluid which interacts with said flow of power fluid from said power nozzle to coNtrol the direction of said flow of power fluid with respect to said apertures, a rate of chamber pressure sensor comprising a capsule, mass balanced beam and pad valve assembly which operates to vary the flow of control fluid to the control nozzle of said fluid amplifier to control the flow of power fluid to said apertures, means responsive to flow of power fluid from said apertures to actuate at least one of said pressure increasing means and said pressure decreasing means to adjust chamber pressure towards a predetermined value.

Claim 10

A fluid-operated pressure control system comprising a chamber, pressure increasing means and pressure decreasing means, a fluid amplifier including a power nozzle for a flow of power fluid, a plurality of outlet apertures for said power fluid, and at least one control nozzle for a flow of control fluid which interacts with said flow of power fluid from said power nozzle to coNtrol the direction of said flow of power fluid with respect to said apertures, a rate of chamber pressure sensor comprising a capsule, mass balanced beam and pad valve assembly which operates to vary the flow of control fluid to the control nozzle of said fluid amplifier to control the flow of power fluid to said apertures, means responsive to flow of power fluid from said apertures to actuate at least one of said pressure increasing means and said pressure decreasing means to adjust chamber pressure towards a predetermined value.

Claim 11

A fluid-operated pressure control system as claimed in claim 8, wherein said capsule is externally sensitive to direct pressure change and internally sensitive to controlled pressure change, the resulting movement of said capsule in response to pressure change, and cooperating with said mass balanced beam and pad valve assembly providing a signal indicative of the rate of change in pressure.

Claim 12

A fluid-operated pressure control system as claimed in claim 9, wherein the internal pressure of said capsule is controlled by manually operated rate selector means.

Claim 13

A fluid operated pressure control system as claimed in claim 8, including a differential pressure sensor which senses internal chamber pressure and ambient pressure around said chamber and presents a resultant output signal at a control nozzle of a fluid amplifier tending to divert the power flow of said amplifier and thereafter actuating means which maintain the differential pressure within a predetermined value.

Claim 14

A fluid-operated pressure control system as claimed in claim 11, wherein said sensor actuates a discharge valve to open and thereby reduce said differential pressure.

Claim 15

A fluid-operated control system as claimed in claim 8, wherein said power fluid and said control fluid comprise air.

Claim 16

A fluid-operated control system as claimed in claim 8, wherein said system utilizes beam deflection pressure interaction vented amplifiers.

Claim 17

A fluid operated control system as claimed in claim 8, wherein said system utilizes beam deflection jet interaction vented amplifiers.