GB922982A - Load cell - Google Patents

Load cell

Info

Publication number
GB922982A
GB922982A GB3670561A GB3670561A GB922982A GB 922982 A GB922982 A GB 922982A GB 3670561 A GB3670561 A GB 3670561A GB 3670561 A GB3670561 A GB 3670561A GB 922982 A GB922982 A GB 922982A
Authority
GB
United Kingdom
Prior art keywords
plate
cover
gauges
strain
centre
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
GB3670561A
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.)
Carl Schenck AG
Original Assignee
Carl Schenck Maschinenfabrik GmbH
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 Carl Schenck Maschinenfabrik GmbH filed Critical Carl Schenck Maschinenfabrik GmbH
Publication of GB922982A publication Critical patent/GB922982A/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
    • G01L1/14—Measuring force or stress, in general by measuring variations in capacitance or inductance of electrical elements, e.g. by measuring variations of frequency of electrical oscillators
    • 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
    • G01L1/2206—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports
    • G01L1/2231—Special supports with preselected places to mount the resistance strain gauges; Mounting of supports the supports being disc- or ring-shaped, adapted for measuring a force along a single direction

Abstract

922,982. Measuring electrically. CARL SCHENCK MASCHINENFABRIK G.m.b.H. Oct. 12, 1961 [Oct. 14, 1960], No. 36705/61. Class 40 (1). A load cell or pressure gauge comprises a circular plate 1 peripherally supported by a rigid annular portion 2, the thickness of the plate varying as a function of distance from the centre in such a way that, when a force P is applied to a central hub 3 of the plate, the sign of strain in the plate changes abruptly at a predetermined distance from the centre. Thus, as shown, the direction of strain changes at the thinnest part of the plate, which is approximately half the radius in distance from the centre, so that, of strain gauges 7 . . . 10 fixed to the underside of the plate, gauges 7 and 10 are compressed while gauges 8 and 9 are stretched; the magnitude of the strain is the same in all the gauges, which are connected in a Wheatstone bridge arrangement for measurement purposes. The strain gauges are protected by a cover 5 bolted to the plate. To maintain the pressure in the space 4 between plate and cover equal to ambient pressure, the cover may be fitted with a flexible diaphragm 11, the chamber 12 between the diaphragm and the rest of the cover being open to the atmosphere at 13. When the diaphragm is not provided, the cover may have a central stop member to limit the deflection of the plate. For measuring tractive forces, the exterior of the cover is provided with a central hub. In a modification, the strain gauges are replaced by an inductance coil mounted on the cover which co-operates with a feeler on the plate to detect the degree of deflection of the plate.
GB3670561A 1960-10-14 1961-10-12 Load cell Expired GB922982A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DESCH28607A DE1129317B (en) 1960-10-14 1960-10-14 Load cell

Publications (1)

Publication Number Publication Date
GB922982A true GB922982A (en) 1963-04-03

Family

ID=7431161

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3670561A Expired GB922982A (en) 1960-10-14 1961-10-12 Load cell

Country Status (3)

Country Link
CH (1) CH399007A (en)
DE (1) DE1129317B (en)
GB (1) GB922982A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3289134A (en) * 1964-04-24 1966-11-29 Blh Electronics Gaged diaphragm pressure transducer
US3433063A (en) * 1964-12-10 1969-03-18 Tno Measuring element for dynamometers
US3453582A (en) * 1965-12-18 1969-07-01 Schenck Gmbh Carl Force measuring device
US3706349A (en) * 1970-10-02 1972-12-19 Toroid Corp Load cell
US4111091A (en) * 1976-01-30 1978-09-05 Nippon Gakki Seizo Kabushiki Kaisha Touch response sensor for an electronic musical instrument
US4545262A (en) * 1982-11-12 1985-10-08 Hottinger Baldwin Measurements, Inc. Force measuring device or load cell
GB2181247A (en) * 1985-10-02 1987-04-15 Standard Telephones Cables Ltd Transducer for sensing angular motion eg a gyroscope
US5024107A (en) * 1988-07-13 1991-06-18 U.S. Philips Corporation Pressure or force sensor having an axially symmetrical pressure or force-receiving circular plate spring
US7272976B2 (en) 2004-03-30 2007-09-25 Asml Holdings N.V. Pressure sensor
JP2018054293A (en) * 2016-09-26 2018-04-05 日立オートモティブシステムズ株式会社 Load sensor

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3712123A (en) * 1971-01-07 1973-01-23 Blh Electronics Compound-plate strain gage transducer
DE2729064C2 (en) * 1977-06-28 1985-04-11 Philips Patentverwaltung Gmbh, 2000 Hamburg Symmetrical flat load cell
DE3627127A1 (en) * 1986-08-06 1988-02-18 Pfister Gmbh MEMBRANE FOR FORCE MEASURING DEVICES
CH671632A5 (en) * 1986-11-03 1989-09-15 Oerlikon Buehrle Ag Pressure measuring device recording number of weapon shots - has membrane disc supported by spring bellows cooperating with inductive displacement sensor
DE3736154A1 (en) * 1987-10-26 1989-05-03 Schenck Ag Carl Load cell (force measuring transducer)
DE3924629A1 (en) * 1989-07-26 1991-02-07 Schenck Ag Carl Force measurement cell, pref. for weighing - has strain measurement elements on deformation ring protected by cover plate and connected in full bridge circuit
DE4232568C2 (en) * 1992-09-29 2000-08-03 Gwt Global Weighing Technologi Integrated overload protection, especially for a cylindrical load cell
DE4232785A1 (en) * 1992-09-30 1994-03-31 Philips Patentverwaltung Circular plate spring for a load cell
DE102007055566B4 (en) 2007-11-20 2012-10-11 Schenck Process Gmbh Dosing scale for bulk material

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3289134A (en) * 1964-04-24 1966-11-29 Blh Electronics Gaged diaphragm pressure transducer
US3433063A (en) * 1964-12-10 1969-03-18 Tno Measuring element for dynamometers
US3453582A (en) * 1965-12-18 1969-07-01 Schenck Gmbh Carl Force measuring device
US3706349A (en) * 1970-10-02 1972-12-19 Toroid Corp Load cell
US4111091A (en) * 1976-01-30 1978-09-05 Nippon Gakki Seizo Kabushiki Kaisha Touch response sensor for an electronic musical instrument
US4545262A (en) * 1982-11-12 1985-10-08 Hottinger Baldwin Measurements, Inc. Force measuring device or load cell
GB2181247A (en) * 1985-10-02 1987-04-15 Standard Telephones Cables Ltd Transducer for sensing angular motion eg a gyroscope
GB2181247B (en) * 1985-10-02 1989-09-27 Standard Telephones Cables Ltd Gyroscope device
US5024107A (en) * 1988-07-13 1991-06-18 U.S. Philips Corporation Pressure or force sensor having an axially symmetrical pressure or force-receiving circular plate spring
US7272976B2 (en) 2004-03-30 2007-09-25 Asml Holdings N.V. Pressure sensor
JP2018054293A (en) * 2016-09-26 2018-04-05 日立オートモティブシステムズ株式会社 Load sensor

Also Published As

Publication number Publication date
CH399007A (en) 1966-03-15
DE1129317B (en) 1962-05-10

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