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公开(公告)号：US3800413A
公开(公告)日：1974-04-02
申请号：US3800413D
申请日：1971-07-26
Applicant: ROSEMOUNT INC
Inventor： FRICK R
CPC classification number: G01L13/025 , G01L9/0072 , Y10T29/49002
Abstract: A differential pressure transducer of the capacitor type utilizing isolation diaphragms for sensing the differential pressure directly, and having a central chamber with a sensing diaphragm in the central chamber. The central chamber is filled with oil or a suitable liquid which transmits pressure from the isolation diaphragms to the sensing diaphragm. The sensing diaphragm forms a capacitor plate, and the walls of the chamber adjacent to the sensing diaphragm also form capacitor plates. The pressures are transmitted to the sensing diaphragm through the oil so that only differential pressure is sensed between the two isolation diaphragms. The sensing diaphragm and its chamber are made so that any excessive pressure causes the sensing diaphragm to bottom out against its mounting chamber surfaces. The unit is made extremely stable, by using a relatively massive metal housing with a glass center portion fused thereto, and depositing the metallic capacitor plate material right onto the glass surfaces which form the sensing chamber.
Abstract translation: 电容式差压变送器采用隔离膜片，用于直接感应差压，并在中央室具有一个带有感应膜片的中央室。 中央室充满油或合适的液体，其将压力从隔离膜片传递到感测膜片。 传感隔膜形成电容器板，并且与检测膜相邻的室的壁也形成电容器板。 压力通过油传递到感测隔膜，使得仅在两个隔离隔膜之间感测到差压。 传感膜片及其腔室被制成使得任何过大的压力都会使感测膜片向下抵靠其安装室表面。 通过使用熔融有玻璃中心部分的相当大的金属外壳，并将金属电容器板材料恰好沉积到形成感测室的玻璃表面上，使该单元非常稳定。
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公开(公告)号：US3793885A
公开(公告)日：1974-02-26
申请号：US3793885D
申请日：1972-09-05
Applicant: ROSEMOUNT INC
Inventor： FRICK R
CPC classification number: G01L9/0072 , G01L13/025
Abstract: A diaphragm construction for a differential pressure transducer wherein the diaphragm is deflected under pressure, and which has means around the periphery thereof to isolate the diaphragm stresses from the mounting portion of the diaphragm.
Abstract translation: 一种用于差压传感器的隔膜结构，其中隔膜在压力下偏转，并且其周围具有装置以隔离隔膜应力与隔膜的安装部分。
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