High fidelity pressure transducer
First Claim
Patent Images
1. A method for brazing the quartz parts of a structure comprising the steps of:
- disposing a segmented band of eutectic alloy on one surface of the first part;
disposing a correspondingly segmented band of eutectic alloy on one surface of the second part;
mating the bands of alloy of the first and second parts to form the structure;
applying a mating force along a line corresponding to the mated bands of alloy;
heating the structure to approximately 200°
C. for less than an hour;
gradually increasing the heat applied to the structure approximately 260°
C. for less than one additional hour; and
gradually cooling the structure to room temperature.
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Abstract
The capacitive fluid pressure transducers described herein comprise quartz bodies and diaphragms having suitable electrodes deposited thereon to form both sensing and reference capacitors in appropriate configurations for high fidelity measurement of relative blood pressure, said transducers being substantially unaffected by temperature and other environment factors.
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Citations
8 Claims
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1. A method for brazing the quartz parts of a structure comprising the steps of:
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disposing a segmented band of eutectic alloy on one surface of the first part; disposing a correspondingly segmented band of eutectic alloy on one surface of the second part; mating the bands of alloy of the first and second parts to form the structure; applying a mating force along a line corresponding to the mated bands of alloy; heating the structure to approximately 200°
C. for less than an hour;gradually increasing the heat applied to the structure approximately 260°
C. for less than one additional hour; andgradually cooling the structure to room temperature. - View Dependent Claims (2, 3, 4)
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5. A brazed quartz structure comprising:
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a first part having a segmented band of eutectic alloy disposed on one surface; and a second part having a correspondingly segmented band of eutectic alloy disposed on one surface for mating with the band of alloy on one surface of the first part; said segmented bands of alloy being fused together for effecting a substantially uniform clamping of the first part to the second part and for reducing thermal stresses in the first and second parts. - View Dependent Claims (6, 7, 8)
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Specification