GB571003A - Improvements in and relating to electrical strain-gauge apparatus - Google Patents

Improvements in and relating to electrical strain-gauge apparatus

Info

Publication number
GB571003A
GB571003A GB1615843A GB1615843A GB571003A GB 571003 A GB571003 A GB 571003A GB 1615843 A GB1615843 A GB 1615843A GB 1615843 A GB1615843 A GB 1615843A GB 571003 A GB571003 A GB 571003A
Authority
GB
United Kingdom
Prior art keywords
amplifier
input
impulses
cam
duration
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.)
Expired
Application number
GB1615843A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1615843A priority Critical patent/GB571003A/en
Publication of GB571003A publication Critical patent/GB571003A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/20—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress
    • G01L1/22—Measuring force or stress, in general by measuring variations in ohmic resistance of solid materials or of electrically-conductive fluids; by making use of electrokinetic cells, i.e. liquid-containing cells wherein an electrical potential is produced or varied upon the application of stress using resistance strain gauges
    • G01L1/225—Measuring circuits therefor

Abstract

571,003. Determining physical qualities and dimensions of materials ; resistance measurements. BOYDELL, K. R. Oct. 1, 1943, No. 16158. [Class 37] In strain gauging apparatus of the type in which the variations of potential of a direct current produced by the strain gauges are fed to an amplifier, the output of which operates an indicating or recording device, the input to the amplifier is periodically interrupted so that steady stresses may be measured as well as alternating stresses. The voltage to be measured is compared with a datum voltage, and the interruption of the input to the amplifier is such that the duration of the impulses is markedly different from the intervals between them. The strain gauges 1, 2 are connected in a bridge circuit energized from a D.C. source 3. Leads 4, 5 are connected to the input terminals of a thermionic amplifier 6, the output of which is connected to a recording device 7, which may be an oscillograph of the mirror galvanometer type. Alternatively, a voltmeter 8 may be employed. A condenser 9 prevents the passage of D.C. to the amplifier 6. Between the leads 4, 5 is a switch 10 which, when closed, short-circuits the input to the amplifier. This is opened and closed rapidly by a cam 12 driven by a motor 11. The cam 12 is designed so that the duration of the impulses is markedly different from the intervals between them, to give recognisably different wave-forms according as the variations in potential are in a positive or negative direction from the datum value.
GB1615843A 1943-10-01 1943-10-01 Improvements in and relating to electrical strain-gauge apparatus Expired GB571003A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1615843A GB571003A (en) 1943-10-01 1943-10-01 Improvements in and relating to electrical strain-gauge apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1615843A GB571003A (en) 1943-10-01 1943-10-01 Improvements in and relating to electrical strain-gauge apparatus

Publications (1)

Publication Number Publication Date
GB571003A true GB571003A (en) 1945-08-01

Family

ID=10072208

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1615843A Expired GB571003A (en) 1943-10-01 1943-10-01 Improvements in and relating to electrical strain-gauge apparatus

Country Status (1)

Country Link
GB (1) GB571003A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2612039A (en) * 1946-04-10 1952-09-30 Curtiss Wright Corp Stress measurment technique
US2675701A (en) * 1954-04-20 Loab measuring apparatus
US2782638A (en) * 1949-12-30 1957-02-26 Arx William S Von Tidal current meter
US2817966A (en) * 1953-03-16 1957-12-31 Sun Oil Co Engine power indicator
US2982123A (en) * 1957-08-14 1961-05-02 Phillips Petroleum Co Programming circuit for chromatographic analyzer
US2995410A (en) * 1957-12-26 1961-08-08 Perkin Elmer Corp Calibrated bar graph recording system
US3018658A (en) * 1954-11-05 1962-01-30 Tinius Olsen Testing Mach Co Apparatus for controlling rate of change of condition
US3023605A (en) * 1957-08-19 1962-03-06 Phillips Petroleum Co Chromatographic analyzer
US3108648A (en) * 1958-01-23 1963-10-29 Toledo Scale Corp Condition responsive device

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2675701A (en) * 1954-04-20 Loab measuring apparatus
US2612039A (en) * 1946-04-10 1952-09-30 Curtiss Wright Corp Stress measurment technique
US2782638A (en) * 1949-12-30 1957-02-26 Arx William S Von Tidal current meter
US2817966A (en) * 1953-03-16 1957-12-31 Sun Oil Co Engine power indicator
US3018658A (en) * 1954-11-05 1962-01-30 Tinius Olsen Testing Mach Co Apparatus for controlling rate of change of condition
US2982123A (en) * 1957-08-14 1961-05-02 Phillips Petroleum Co Programming circuit for chromatographic analyzer
US3023605A (en) * 1957-08-19 1962-03-06 Phillips Petroleum Co Chromatographic analyzer
US2995410A (en) * 1957-12-26 1961-08-08 Perkin Elmer Corp Calibrated bar graph recording system
US3108648A (en) * 1958-01-23 1963-10-29 Toledo Scale Corp Condition responsive device

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