CA1112893A - Capacitive load cell and method of manufacture - Google Patents

Capacitive load cell and method of manufacture

Info

Publication number: CA1112893A
Authority: CA; Canada
Prior art keywords: load cell; arm; arms; central arm; load
Prior art date: 1978-05-30
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

CA328,132A

Other languages

English (en)

French (fr)

Inventor

Howard B. Lewis

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.)

National Controls Inc

Original Assignee

National Controls Inc

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.)

1978-05-30

Filing date

1979-05-23

Publication date

1981-11-24

1979-05-23 Application filed by National Controls Inc filed Critical National Controls Inc

1981-11-24 Application granted granted Critical

1981-11-24 Publication of CA1112893A publication Critical patent/CA1112893A/en

Status Expired legal-status Critical Current

Links

238000004519 manufacturing process Methods 0.000 title claims description 9
238000000034 method Methods 0.000 title description 7
229910010293 ceramic material Inorganic materials 0.000 claims abstract description 15
230000008859 change Effects 0.000 claims abstract description 11
238000001465 metallisation Methods 0.000 claims description 43
239000003990 capacitor Substances 0.000 claims description 15
239000000919 ceramic Substances 0.000 claims description 10
239000004020 conductor Substances 0.000 claims description 6
238000002955 isolation Methods 0.000 claims description 6
238000003754 machining Methods 0.000 claims description 4
230000002093 peripheral effect Effects 0.000 claims 1
229920000136 polysorbate Polymers 0.000 abstract description 4
239000010410 layer Substances 0.000 description 31
239000000463 material Substances 0.000 description 7
239000011521 glass Substances 0.000 description 6
PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
238000005452 bending Methods 0.000 description 3
238000012886 linear function Methods 0.000 description 3
239000002245 particle Substances 0.000 description 3
239000003981 vehicle Substances 0.000 description 3
CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
230000001419 dependent effect Effects 0.000 description 2
238000010304 firing Methods 0.000 description 2
238000000227 grinding Methods 0.000 description 2
238000007747 plating Methods 0.000 description 2
230000008569 process Effects 0.000 description 2
229910052709 silver Inorganic materials 0.000 description 2
239000004332 silver Substances 0.000 description 2
NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 1
ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
241000901720 Stator Species 0.000 description 1
230000009471 action Effects 0.000 description 1
XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
229910052782 aluminium Inorganic materials 0.000 description 1
239000000292 calcium oxide Substances 0.000 description 1
235000012255 calcium oxide Nutrition 0.000 description 1
239000004568 cement Substances 0.000 description 1
230000002844 continuous effect Effects 0.000 description 1
230000003247 decreasing effect Effects 0.000 description 1
238000010586 diagram Methods 0.000 description 1
210000005069 ears Anatomy 0.000 description 1
230000000694 effects Effects 0.000 description 1
230000009021 linear effect Effects 0.000 description 1
239000000395 magnesium oxide Substances 0.000 description 1
230000004048 modification Effects 0.000 description 1
238000012986 modification Methods 0.000 description 1
229910052573 porcelain Inorganic materials 0.000 description 1
239000000377 silicon dioxide Substances 0.000 description 1

Classifications

- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G7/00—Weighing apparatus wherein the balancing is effected by magnetic, electromagnetic, or electrostatic action, or by means not provided for in the preceding groups
- G01G7/06—Weighing apparatus wherein the balancing is effected by magnetic, electromagnetic, or electrostatic action, or by means not provided for in the preceding groups by electrostatic action

Landscapes

Physics & Mathematics (AREA)
Electromagnetism (AREA)
General Physics & Mathematics (AREA)
Fixed Capacitors And Capacitor Manufacturing Machines (AREA)
Electric Double-Layer Capacitors Or The Like (AREA)
Oscillators With Electromechanical Resonators (AREA)

CA328,132A 1978-05-30 1979-05-23 Capacitive load cell and method of manufacture Expired CA1112893A (en)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
US91083378A	1978-05-30	1978-05-30
US910,833		1978-05-30

Publications (1)

Publication Number	Publication Date
CA1112893A true CA1112893A (en)	1981-11-24

Family

ID=25429384

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA328,132A Expired CA1112893A (en)	1978-05-30	1979-05-23	Capacitive load cell and method of manufacture

Country Status (12)

Country	Link
JP (1)	JPS5513894A (da)
AR (1)	AR216848A1 (da)
AU (1)	AU521893B2 (da)
BR (1)	BR7903277A (da)
CA (1)	CA1112893A (da)
DE (1)	DE2921614A1 (da)
DK (1)	DK220879A (da)
FR (1)	FR2427592A1 (da)
GB (1)	GB2023843B (da)
NO (1)	NO791775L (da)
SE (1)	SE7904630L (da)
ZA (1)	ZA792588B (da)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2453396A1 (fr) *	1979-04-02	1980-10-31	Testut Aequitas	Recepteur de charge a parallelogramme d'une seule piece et transducteur capacitif
US4899600A (en) *	1981-05-19	1990-02-13	Setra Systems, Inc.	Compact force transducer with mechanical motion amplification
US4558600A (en) *	1982-03-18	1985-12-17	Setra Systems, Inc.	Force transducer
GB2123157B (en) *	1982-06-22	1986-10-15	Peter Caleb Frederi Wolfendale	Load cells
DE3243350C2 (de) *	1982-11-24	1986-06-19	Sauer, Kuno	Gewichtserfassungssystem mit elektromagnetischer Lastkompensation
US4582152A (en) *	1984-08-29	1986-04-15	Armour Pharmaceutical Co.	Weighing mechanism
CH669258A5 (de) *	1985-05-10	1989-02-28	Mettler Instrumente Ag	Temperaturfuehler fuer einen trocknungsaufsatz auf einer waage sowie die anordnung des temperaturfuehlers im trocknungsaufsatz der waage.
AUPM348594A0 (en) *	1994-01-21	1994-02-17	University Of Melbourne, The	Improvements in syringe pumps
AU690631B2 (en) *	1994-01-21	1998-04-30	University Of Melbourne, The	Improvements in syringe pumps

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR1052819A (fr) *	1952-01-17	1954-01-28	Cie Generale Electro Ceramique	Perfectionnement aux dynamomètres
US3292059A (en) *	1964-07-09	1966-12-13	Boeing Co	Force transducer
US3314493A (en) *	1964-11-04	1967-04-18	Kennedy James Patrick	Electrical weigh scale with capacitive transducer
DE2146339B2 (de) *	1971-09-16	1975-04-03	Industrie-Automation Gmbh & Co, 6900 Heidelberg	Elektromechanischer Kraft- oder Druckmeßwandler
GB1374789A (en) *	1972-12-29	1974-11-20	Avery Ltd W T	Force measurement systems
US4168518A (en) *	1977-05-10	1979-09-18	Lee Shih Y	Capacitor transducer

1979
- 1979-05-23 CA CA328,132A patent/CA1112893A/en not_active Expired
- 1979-05-25 BR BR7903277A patent/BR7903277A/pt unknown
- 1979-05-25 GB GB7918369A patent/GB2023843B/en not_active Expired
- 1979-05-25 ZA ZA792588A patent/ZA792588B/xx unknown
- 1979-05-28 DE DE19792921614 patent/DE2921614A1/de not_active Withdrawn
- 1979-05-29 DK DK220879A patent/DK220879A/da unknown
- 1979-05-29 JP JP6672679A patent/JPS5513894A/ja active Pending
- 1979-05-29 FR FR7913572A patent/FR2427592A1/fr active Pending
- 1979-05-29 NO NO791775A patent/NO791775L/no unknown
- 1979-05-29 SE SE7904630A patent/SE7904630L/ not_active Application Discontinuation
- 1979-05-29 AR AR276690A patent/AR216848A1/es active
- 1979-05-29 AU AU47513/79A patent/AU521893B2/en not_active Ceased

Also Published As

Publication number	Publication date
AR216848A1 (es)	1980-01-31
DE2921614A1 (de)	1980-03-27
JPS5513894A (en)	1980-01-31
ZA792588B (en)	1980-06-25
GB2023843A (en)	1980-01-03
DK220879A (da)	1979-12-01
AU4751379A (en)	1979-12-06
AU521893B2 (en)	1982-05-06
GB2023843B (en)	1983-02-02
FR2427592A1 (fr)	1979-12-28
SE7904630L (sv)	1979-12-01
NO791775L (no)	1979-12-03
BR7903277A (pt)	1979-12-11

Legal Events

Date	Code	Title	Description
1998-11-24	MKEX	Expiry

Publication	Publication Date	Title
US4237989A (en)	1980-12-09	Capacitive load cell and method of manufacture
CA1112893A (en)	1981-11-24	Capacitive load cell and method of manufacture
EP0967468A1 (en)	1999-12-29	Capacitive force sensor
US4793189A (en)	1988-12-27	Thick-film strain gauge for sensing stresses & strains in mechanical members or structures
DE69426774T2 (de)	2001-09-27	Kapazitiver Druckwandler mit justierbarer Durchführung
CA1134164A (en)	1982-10-26	Force responsive transducer
JP3757984B2 (ja)	2006-03-22	安定化圧力センサ
US4151578A (en)	1979-04-24	Capacitive pressure transducer
CA2010803C (en)	1995-01-24	Capacitive semiconductive sensor with hinged silicon diaphragm for linear movement
CA1204299A (en)	1986-05-13	Device for measuring force
WO1987004515A1 (en)	1987-07-30	Electronic inclinometer
JPS57168109A (en)	1982-10-16	Device for measuring thickness of work piece in lapping plate
EP0198018A1 (en)	1986-10-22	Capacitive sensing cell made of brittle material
US4463614A (en)	1984-08-07	Force transducer
EP0667532A2 (en)	1995-08-16	Thin film sensor element and method of manufacturing the same
US20040074306A1 (en)	2004-04-22	Mechanical quantity sensor element, load sensor element, acceleration sensor element, and pressure sensor element
JP2666209B2 (ja)	1997-10-22	ロードセルの製造方法
CA1309879C (en)	1992-11-10	Pressure transducer using thick film resistor
Kawamura et al.	2002	Development of a high voltage sensor using a piezoelectric transducer and a strain gage
US20010048139A1 (en)	2001-12-06	Deformation gauge
JPH025375Y2 (da)	1990-02-08
JPS5851604B2 (ja)	1983-11-17	ロ−ドセル式荷重計の調整方法
JPS62124423A (ja)	1987-06-05	重量検出装置
SU1682938A1 (ru)	1991-10-07	Пьезоэлектрический акселерометр
RU2141103C1 (ru)	1999-11-10	Чувствительный элемент датчика давления