Monitoring apparatus
First Claim
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1. A monitoring apparatus for monitoring time by a color change indicator capable of being used multiple times, comprising:
- a colored fluid which causes an observable color change in a transparent section of the apparatus during operation of the apparatus;
a first reservoir holding at least a portion of the colored fluid; and
a second reservoir, defined by non-porous surfaces, abutting the first reservoir;
wherein the first reservoir is responsive to pressure on it such that a portion of the colored fluid flows into the second reservoir;
wherein the second reservoir is responsive to a lack of pressure in the first reservoir such that a portion of the colored fluid in the second reservoir reverses flow back into the first reservoir once the first reservoir is not under pressure.
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Abstract
A monitoring apparatus is disclosed for monitoring time by a color change indicator, comprising an observable fluid, a first reservoir holding at least a portion of the observable fluid, and a second reservoir abutting the first reservoir. The first reservoir is responsive to pressure on it such that a portion of the observable fluid flows into the second reservoir. The second reservoir is responsive to a lack of pressure in the first reservoir such that a portion of the observable fluid in the second reservoir reverses flow back into the first reservoir once the first reservoir is not under pressure.
48 Citations
16 Claims
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1. A monitoring apparatus for monitoring time by a color change indicator capable of being used multiple times, comprising:
- a colored fluid which causes an observable color change in a transparent section of the apparatus during operation of the apparatus;
a first reservoir holding at least a portion of the colored fluid; and
a second reservoir, defined by non-porous surfaces, abutting the first reservoir;
wherein the first reservoir is responsive to pressure on it such that a portion of the colored fluid flows into the second reservoir;
wherein the second reservoir is responsive to a lack of pressure in the first reservoir such that a portion of the colored fluid in the second reservoir reverses flow back into the first reservoir once the first reservoir is not under pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- a colored fluid which causes an observable color change in a transparent section of the apparatus during operation of the apparatus;
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10. A method for monitoring time comprising the steps of:
providing a monitoring apparatus capable of being used multiple times, the apparatus comprises;
a colored fluid which causes an observable color change in a transparent section of the apparatus during operation of the apparatus;
a first reservoir holding at least a portion of the colored fluid;
wherein the first reservoir is responsive to pressure on it such that a portion of the colored fluid flows into the second reservoir;
wherein the second reservoir is responsive to a lack of pressure in the first reservoir such that a portion of the colored fluid in the second reservoir reverses flow back into the first reservoir once the first reservoir is not under pressure;
applying pressure to the first reservoir;
forcing at least a portion of the colored fluid from the first reservoir into the second reservoir; and
observing a color change through a transparent section in at least one of the reservoirs.- View Dependent Claims (11, 12, 13, 14, 15, 16)
Specification