GB1507707A - Gradient sensor - Google Patents

Gradient sensor

Info

Publication number
GB1507707A
GB1507707A GB1877375A GB1877375A GB1507707A GB 1507707 A GB1507707 A GB 1507707A GB 1877375 A GB1877375 A GB 1877375A GB 1877375 A GB1877375 A GB 1877375A GB 1507707 A GB1507707 A GB 1507707A
Authority
GB
United Kingdom
Prior art keywords
sheet
body surface
electrically
sensor
charge pattern
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
GB1877375A
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of GB1507707A publication Critical patent/GB1507707A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K3/00—Thermometers giving results other than momentary value of temperature
    • G01K3/08—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values
    • G01K3/14—Thermometers giving results other than momentary value of temperature giving differences of values; giving differentiated values in respect of space
    • 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
    • G01K7/003—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using pyroelectric elements

Abstract

1507707 Thermal or strain gradient sensor MINNESOTA MINING & MFG CO 5 May 1975 [6 May 1974 (2)] 18773/75 Heading H1K A sensor for detecting and producing a remanent electrostatic image of the temperature or strain gradient of a body surface comprises a sheet of material which has been formed into an electret with pyro- and piezo-electric properties, the surface of the sheet to be brought into contact with the body surface being coated with electrically and thermally conductive material. After sufficient contact time, both surfaces of the sheet are electrically neutralized, then removed from the body surface. As the sheet returns to ambient temperature or its normal configuration, a substantially per. manent charge pattern re-forms, which may be developed using toner particles or electrically recorded, alternatively the charge pattern may be detected in situ. To avoid spurious piezoelectric effects, the sheet may consist of two sheets bonded together by adhesive providing a sufficiently stiff interface, the sheets being poled in the same direction.
GB1877375A 1974-05-06 1975-05-05 Gradient sensor Expired GB1507707A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US46701574A 1974-05-06 1974-05-06
US46701674A 1974-05-06 1974-05-06

Publications (1)

Publication Number Publication Date
GB1507707A true GB1507707A (en) 1978-04-19

Family

ID=27041869

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1877375A Expired GB1507707A (en) 1974-05-06 1975-05-05 Gradient sensor

Country Status (4)

Country Link
JP (1) JPS587921B2 (en)
DE (1) DE2520373A1 (en)
FR (1) FR2270559B3 (en)
GB (1) GB1507707A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2116979A (en) * 1982-02-25 1983-10-05 Ward Page Faulk Conjugates of proteins with anti- tumour agents

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1053410B (en) * 1975-01-22 1981-08-31 Minnesota Mining & Mfg MECHANICAL STRESS SENSOR DEVICE USING A PIEZOELECTRIC MATERIAL
US3971250A (en) * 1975-02-18 1976-07-27 Minnesota Mining And Manufacturing Company Electret sensing medium having plural sensing units
DE2605809C2 (en) * 1976-02-12 1986-11-13 Minnesota Mining And Manufacturing Co., Saint Paul, Minn. Sensor device for detecting a change in temperature or a change in bending stress
JPS59195222U (en) * 1983-06-14 1984-12-25 松下冷機株式会社 compressor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2116979A (en) * 1982-02-25 1983-10-05 Ward Page Faulk Conjugates of proteins with anti- tumour agents

Also Published As

Publication number Publication date
FR2270559B3 (en) 1978-11-17
JPS587921B2 (en) 1983-02-14
JPS50153688A (en) 1975-12-10
DE2520373A1 (en) 1975-11-20
FR2270559A1 (en) 1975-12-05

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Legal Events

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