GB1286262A - Maturity meter - Google Patents

Maturity meter

Info

Publication number
GB1286262A
GB1286262A GB4156968A GB4156968A GB1286262A GB 1286262 A GB1286262 A GB 1286262A GB 4156968 A GB4156968 A GB 4156968A GB 4156968 A GB4156968 A GB 4156968A GB 1286262 A GB1286262 A GB 1286262A
Authority
GB
United Kingdom
Prior art keywords
bridge
capacitors
aug
charged
counter
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
GB4156968A
Inventor
Peter Webster Hutton
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.)
A E ELECTRONICS Ltd
Original Assignee
A E ELECTRONICS Ltd
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 A E ELECTRONICS Ltd filed Critical A E ELECTRONICS Ltd
Priority to GB4156968A priority Critical patent/GB1286262A/en
Priority to FR6929653A priority patent/FR2017113A1/fr
Priority to CH1313169A priority patent/CH504688A/en
Priority to SE1197669A priority patent/SE353151B/xx
Priority to DE19691943908 priority patent/DE1943908A1/en
Publication of GB1286262A publication Critical patent/GB1286262A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N25/00—Investigating or analyzing materials by the use of thermal means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
    • G01K7/24—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor in a specially-adapted circuit, e.g. bridge circuit
    • G01K7/245—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor in a specially-adapted circuit, e.g. bridge circuit in an oscillator circuit

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Nonlinear Science (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

1286262 Measuring temperature electrically A E ELECTRONICS Ltd 29 Aug 1969 [30 Aug 1968] 41569/68 Heading G1N [Also in Division G4] Capacitors 39, 40, Fig.1, discharged to produce an output pulse to counter 55A by a unijunction transistor 43 each time the charge reaches a predetermined level are charged at a rate dependent on the temperature of a material in which a probe 26 is in contact. If the material is concrete or plastics the count represents its maturity. The detector 26 is preferably a thermistor and is positioned in a bridge circuit 26, 27, 28, 29, 30, 31, the resistor 31 being used to balance the bridge. The bridge output is applied to an operational amplifier circuit 38 so that the capacitors 39, 40 in the base circuit of the unijunction transistor 43 of a relaxation oscillator are charged and discharged. The switching point for transistor 43 is selected by variable resistor 44. The discharge pulse train is fed via a two-stage amplifier to the counter 55A.
GB4156968A 1968-08-30 1968-08-30 Maturity meter Expired GB1286262A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB4156968A GB1286262A (en) 1968-08-30 1968-08-30 Maturity meter
FR6929653A FR2017113A1 (en) 1968-08-30 1969-08-29
CH1313169A CH504688A (en) 1968-08-30 1969-08-29 Method and device for monitoring the state of maturity of a material, in particular of setting concrete
SE1197669A SE353151B (en) 1968-08-30 1969-08-29
DE19691943908 DE1943908A1 (en) 1968-08-30 1969-08-29 Method and apparatus for monitoring the state of maturity of bodies, e.g. of setting concrete

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4156968A GB1286262A (en) 1968-08-30 1968-08-30 Maturity meter

Publications (1)

Publication Number Publication Date
GB1286262A true GB1286262A (en) 1972-08-23

Family

ID=10420306

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4156968A Expired GB1286262A (en) 1968-08-30 1968-08-30 Maturity meter

Country Status (5)

Country Link
CH (1) CH504688A (en)
DE (1) DE1943908A1 (en)
FR (1) FR2017113A1 (en)
GB (1) GB1286262A (en)
SE (1) SE353151B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2130731A (en) * 1982-11-18 1984-06-06 Nittan Co Ltd Electrical temperature sensors
US4715726A (en) * 1985-11-01 1987-12-29 Ohbayashi-Gumi, Ltd. Method of measuring the strength of concrete for slip form process

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2130731A (en) * 1982-11-18 1984-06-06 Nittan Co Ltd Electrical temperature sensors
US4715726A (en) * 1985-11-01 1987-12-29 Ohbayashi-Gumi, Ltd. Method of measuring the strength of concrete for slip form process
AU588596B2 (en) * 1985-11-01 1989-09-21 Ohbayashi-Gumi Ltd. Method of measuring the strength of concrete for slip form process

Also Published As

Publication number Publication date
SE353151B (en) 1973-01-22
DE1943908A1 (en) 1970-03-05
CH504688A (en) 1971-03-15
FR2017113A1 (en) 1970-05-15

Similar Documents

Publication Publication Date Title
GB1385660A (en) Resistance-to-frequency converter
US3859512A (en) Rate meter
GB1508151A (en) Signal rate to voltage converter
GB1286262A (en) Maturity meter
US4143318A (en) Wide range digital meter
GB1415465A (en) Humidity indicator
GB997181A (en) Temperature measuring instrument
GB1175518A (en) Apparatus for Indicating, Recording and Predicting Local and Distant Thunderstorms
GB1421337A (en) Apparatus for detecting variations in the magnitudes of physical quantities
GB1320503A (en) Digital signal linearizer
GB1084653A (en) Measurement of fluid flow
GB1150436A (en) Oscillator Circuit for the Measurement of Capacitance Differences
GB999434A (en) Improvements relating to measuring apparatus
SU399822A1 (en) DEVICE FOR MEASUREMENT OF TIME INTERVALS
GB1083526A (en) Apparatus for measuring the reverse recovery charge of fast semiconductor diodes
US3638115A (en) Rate parameter indicator having meter movement smoothing at low rates
SU375582A1 (en) DIGITAL DEVICE FOR MEASURING VALUE
SU464839A1 (en) Microwave power meter
SU375574A1 (en) DIGITAL MEASURER OF FREQUENCY FILLING PULSE-MODULATED VIBRATION
GB1271682A (en) Standardization system for a digital radiation gauge
SU418802A1 (en)
GB999750A (en) Capacitance measuring apparatus
SU485305A1 (en) Device for measuring linear dimensions
SU551574A1 (en) Device for measuring signal delays in quadrupoles
SU767966A1 (en) Device for measuring duration of transitory process

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee