JPS57136130A - Pressure gage - Google Patents

Pressure gage

Info

Publication number
JPS57136130A
JPS57136130A JP2264281A JP2264281A JPS57136130A JP S57136130 A JPS57136130 A JP S57136130A JP 2264281 A JP2264281 A JP 2264281A JP 2264281 A JP2264281 A JP 2264281A JP S57136130 A JPS57136130 A JP S57136130A
Authority
JP
Japan
Prior art keywords
crystal oscillator
cap
atmospheric pressure
protecting metal
metal cap
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2264281A
Other languages
Japanese (ja)
Inventor
Tamotsu Koyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sharp Corp filed Critical Sharp Corp
Priority to JP2264281A priority Critical patent/JPS57136130A/en
Publication of JPS57136130A publication Critical patent/JPS57136130A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0001—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means
    • G01L9/0008—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means using vibrations
    • G01L9/0022—Transmitting or indicating the displacement of elastically deformable gauges by electric, electro-mechanical, magnetic or electro-magnetic means using vibrations of a piezoelectric element

Abstract

PURPOSE:To obtain high accuracy, by providing a crystal oscillator which can be arranged under the atmospheric pressure and a means which counts the signal related to the oscillating signal of said oscillator during the reference time interval. CONSTITUTION:A stem 1, a tuning fork type crystal oscillator chip 2, leads, 3 and 4, a protecting metal cap 5, and an opening part 6 for the protecting metal cap are provided. Owing to said opening part 6, the crystal oscillator chip 2 is placed under the external atmospheric pressure (a tuning fork type crystal oscillator used in an electronic watch is hermetically sealed). Instead of the protecting metal cap 5, a cap 7 formed by a porous material can be used. Said cap 7 can passes the atmospheric pressure but prevents the foreign matter from entering the inside.
JP2264281A 1981-02-17 1981-02-17 Pressure gage Pending JPS57136130A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2264281A JPS57136130A (en) 1981-02-17 1981-02-17 Pressure gage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2264281A JPS57136130A (en) 1981-02-17 1981-02-17 Pressure gage

Publications (1)

Publication Number Publication Date
JPS57136130A true JPS57136130A (en) 1982-08-23

Family

ID=12088495

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2264281A Pending JPS57136130A (en) 1981-02-17 1981-02-17 Pressure gage

Country Status (1)

Country Link
JP (1) JPS57136130A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0099330A2 (en) * 1982-07-13 1984-01-25 Asulab S.A. Pressure-sensitive element and pressure transducer using such an element
EP0101669A2 (en) * 1982-08-19 1984-02-29 Asulab S.A. Measuring device using a temperature-compensated piezoelectric resonator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0099330A2 (en) * 1982-07-13 1984-01-25 Asulab S.A. Pressure-sensitive element and pressure transducer using such an element
EP0101669A2 (en) * 1982-08-19 1984-02-29 Asulab S.A. Measuring device using a temperature-compensated piezoelectric resonator

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