GB1399947A - Hardness tester - Google Patents

Hardness tester

Info

Publication number
GB1399947A
GB1399947A GB999873A GB999873A GB1399947A GB 1399947 A GB1399947 A GB 1399947A GB 999873 A GB999873 A GB 999873A GB 999873 A GB999873 A GB 999873A GB 1399947 A GB1399947 A GB 1399947A
Authority
GB
United Kingdom
Prior art keywords
indentor
wires
springs
march
pair
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
GB999873A
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.)
KROESKE E
Original Assignee
KROESKE E
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 KROESKE E filed Critical KROESKE E
Priority to GB999873A priority Critical patent/GB1399947A/en
Publication of GB1399947A publication Critical patent/GB1399947A/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
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/40—Investigating hardness or rebound hardness
    • G01N3/42—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

1399947 Hardness testers E KROESKE 1 March 1974 [1 March 1973] 9998/73 Heading G1S A paraboloid diamond 19, Fig. 1, is carried by an indentor 18 having upper and lower collars 22 connected by C-shaped springs 21 to a housing formed by upper and lower plates 10, 11 and a shield 13. The springs 21 bias the indentor in an upward direction, and tension springs 23 fastened to the lower collar 22 and passing through the upper collar 22 may be adjusted by means of nuts 24 and screws 25 to calibrate the indentor. Four unbonded strain gauge wires 26A, 26B are attached in pairs to the upper and lower collars and top and: bottom plates respectively so that one pair of wires will experience an increase and the other pair of wires a decrease in length on downward movement of the indentor, these four wires being connected in a bridge circuit (not shown) and via an amplifier to a digital voltmeter recording the depth of the indentation. The hardness is recorded on an arbitrary scale. A table 27, Fig. 1, may be raised to preload the test piece 28 and weights may be lowered on to the plate 20 at the top of the indentor.
GB999873A 1973-03-01 1973-03-01 Hardness tester Expired GB1399947A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB999873A GB1399947A (en) 1973-03-01 1973-03-01 Hardness tester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB999873A GB1399947A (en) 1973-03-01 1973-03-01 Hardness tester

Publications (1)

Publication Number Publication Date
GB1399947A true GB1399947A (en) 1975-07-02

Family

ID=9882688

Family Applications (1)

Application Number Title Priority Date Filing Date
GB999873A Expired GB1399947A (en) 1973-03-01 1973-03-01 Hardness tester

Country Status (1)

Country Link
GB (1) GB1399947A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2167568A (en) * 1984-11-22 1986-05-29 Eric Dransfield Method and apparatus for the measurement of the hardness of compliant materials
GB2211949A (en) * 1987-11-05 1989-07-12 Helmut Fischer Gmbh & Co A hardness measuring instrument
US5067346A (en) * 1986-07-10 1991-11-26 Commonwealth Scientific And Industrial Research Organization Penetrating measuring instrument
EP0920614A1 (en) * 1996-08-23 1999-06-09 Osteobiologics, Inc. Handheld materials tester

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2167568A (en) * 1984-11-22 1986-05-29 Eric Dransfield Method and apparatus for the measurement of the hardness of compliant materials
US5067346A (en) * 1986-07-10 1991-11-26 Commonwealth Scientific And Industrial Research Organization Penetrating measuring instrument
GB2211949A (en) * 1987-11-05 1989-07-12 Helmut Fischer Gmbh & Co A hardness measuring instrument
GB2211949B (en) * 1987-11-05 1992-04-22 Helmut Fischer Gmbh & Co Device for a hardness measuring instrument
EP0920614A1 (en) * 1996-08-23 1999-06-09 Osteobiologics, Inc. Handheld materials tester
EP0920614A4 (en) * 1996-08-23 2001-10-04 Osteobiologics Inc Handheld materials tester

Similar Documents

Publication Publication Date Title
GB1519406A (en) Thermomechanical analyzer and analyzing method
GB1266311A (en)
GB1377953A (en) Electro-inductive transducers for measurement of displacement
SE8005066L (en) ELECTRONIC VAG
GB1399947A (en) Hardness tester
ES468345A1 (en) Leverless scale sensor
GB1234823A (en) Electrical mass meter
ES460838A1 (en) Composite transducer
US2958786A (en) Transistor transducer
US2955811A (en) Strain gauge weighing balance
GB878103A (en) Improvements in or relating to height gauges
JPS5220078A (en) Creep testing apparatus
FR2240666A5 (en) Non-destructive testing for e.g. runways - provides data for dynamic characteristics by applying shock waves
GB1373992A (en) Force measuring apparatus
GB1088219A (en) Improvements in or relating to displacement measuring devices
ES413170A1 (en) Precision balances
SU429287A1 (en) SCALES WITH INDICATION OF WEIGHT AND COST
GB843515A (en) Improvements in or relating to extensometers
GB1468732A (en) Material hardness testing devices
GB926066A (en) Arrangement for determining buckling of rails
GB1209309A (en) Improvements in weighing apparatus
GB1087226A (en) Tensiometers
SU84595A2 (en) Weight device
SU420891A1 (en) DEVICE FOR MEASURING THE FORCE OF FRICTION OF THE RUNNER ABOUT THE RING OF THE SPINNING MACHINE
GB655360A (en) Improvements in and relating to acoustic strain gauges

Legal Events

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