PHYSICAL/CHEMICAL UNIFORM PRESSURE INDICATING CONSTRUCTS INCLUDING CHEMISTRIES, FILMS AND DEVICES CONFIGURATIONS
First Claim
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1. A pressure sensor for visually determining whether a particular pressure has been reached, the sensor comprising:
- a) a substrate having a planar surface;
b) a pressure sensitive optical change layer present on said planar surface, said pressure sensitive optical change layer capable of undergoing an optical change reaction from a first optical state indicating that the particular pressure has not been reached to a second optical state indicating that the particular pressure has been reached; and
c) an optically transparent layer positioned on top of said pressure sensitive optical change layer and configured to seal said pressure sensitive optical change layer from the external environment of said sensorwherein when the particular pressure has been reached said pressure sensitive optical change layer changes from said first optical state to said second optical state, andwherein said optically transparent layer acts as a visible means for viewing the optical change reaction that occurs as a result of the pressure sensor being subjected to the particular pressure.
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Abstract
Pressure measurement and recording mediums and devices that can respond accurately and reliably to uniform pressure conditions including non-gaseous environments and industrial processing environments are disclosed. Also discloses are methods of making and using the devices.
26 Citations
26 Claims
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1. A pressure sensor for visually determining whether a particular pressure has been reached, the sensor comprising:
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a) a substrate having a planar surface; b) a pressure sensitive optical change layer present on said planar surface, said pressure sensitive optical change layer capable of undergoing an optical change reaction from a first optical state indicating that the particular pressure has not been reached to a second optical state indicating that the particular pressure has been reached; and c) an optically transparent layer positioned on top of said pressure sensitive optical change layer and configured to seal said pressure sensitive optical change layer from the external environment of said sensor wherein when the particular pressure has been reached said pressure sensitive optical change layer changes from said first optical state to said second optical state, and wherein said optically transparent layer acts as a visible means for viewing the optical change reaction that occurs as a result of the pressure sensor being subjected to the particular pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 20, 21, 22, 23, 24, 25, 26)
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10. A pressure sensor for visually determining whether a particular pressure has been reached, the sensor comprising:
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a) a compliant medium; and b) a pressure sensitive relief structure surrounding the compliant medium, said pressure sensitive relief structure capable of undergoing a conformational change from a first conformation indicating that the particular pressure has not been reached to a second conformation indicating that the particular pressure has been reached, wherein when the particular pressure has been reached said pressure sensitive relief structure changes from said first conformation to said second conformation in a predetermined manner at the predetermined pressure. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification