GB1172776A – Improvements relating to Apparatus for Measuring the Hardness of the Materials.
– Google Patents
GB1172776A – Improvements relating to Apparatus for Measuring the Hardness of the Materials.
– Google Patents
Improvements relating to Apparatus for Measuring the Hardness of the Materials.
Info
Publication number
GB1172776A
GB1172776A
GB35906/67A
GB3590667A
GB1172776A
GB 1172776 A
GB1172776 A
GB 1172776A
GB 35906/67 A
GB35906/67 A
GB 35906/67A
GB 3590667 A
GB3590667 A
GB 3590667A
GB 1172776 A
GB1172776 A
GB 1172776A
Authority
GB
United Kingdom
Prior art keywords
indenter
hardness
measuring
crystal
piezo
Prior art date
1967-08-04
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
GB35906/67A
Inventor
Gordon Howard Townend
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.)
GKN Group Services Ltd
Original Assignee
GKN Group Services 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.)
1967-08-04
Filing date
1967-08-04
Publication date
1969-12-03
1967-08-04
Application filed by GKN Group Services Ltd
filed
Critical
GKN Group Services Ltd
1967-08-04
Priority to GB35906/67A
priority
Critical
patent/GB1172776A/en
1968-07-30
Priority to CH1156968A
priority
patent/CH486695A/en
1968-07-31
Priority to SE10365/68A
priority
patent/SE331374B/xx
1968-08-02
Priority to FR1585245D
priority
patent/FR1585245A/fr
1968-08-03
Priority to DE19681773984
priority
patent/DE1773984A1/en
1968-08-05
Priority to US750061A
priority
patent/US3529467A/en
1969-12-03
Publication of GB1172776A
publication
Critical
patent/GB1172776A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
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
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
G01N3/48—Investigating hardness or rebound hardness by performing impressions under impulsive load by indentors, e.g. falling ball
G—PHYSICS
G01—MEASURING; TESTING
G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
G01N2203/02—Details not specific for a particular testing method
G01N2203/06—Indicating or recording means; Sensing means
G01N2203/0617—Electrical or magnetic indicating, recording or sensing means
G01N2203/0623—Electrical or magnetic indicating, recording or sensing means using piezo-electric gauges
Abstract
1,172,776. Measuring hardness of material electrically. G.K.N. GROUP SERVICES Ltd. July 31, 1968 [Aug.4, 1967], No.35906/67. Addition to 1,027,226. Heading G1N. Apparatus for determining the hardness of a substance by measuring the maximum stress produced when an indenter tip supplied with a predetermined kinetic energy is allowed to strike the substance, is characterized is that the energy source comprises springs which also act as guide means for the indenter. As shown Fig. 1, the indenter 19 backed by a Piezo-crystal 20 and a mass 21, is supported by leaf springs 14a, 14b which also act as leads for the signal from the crystal. By means of a lever (27, Fig. 2 not shown), the indenter assembly is raised until it rests on a plate 30, thereby producing the required kinetic energy in the stressed leaf springs. Depression of a button 31 releases the assembly, the tip of indenter 19 strikes the test surface, and the maximum value of the stress signal from the Piezo-crystal 20 is noted as being indicative of the hardness of test material.
GB35906/67A
1965-08-10
1967-08-04
Improvements relating to Apparatus for Measuring the Hardness of the Materials.
Expired
GB1172776A
(en)
Priority Applications (6)
Application Number
Priority Date
Filing Date
Title
GB35906/67A
GB1172776A
(en)
1967-08-04
1967-08-04
Improvements relating to Apparatus for Measuring the Hardness of the Materials.
CH1156968A
CH486695A
(en)
1965-08-10
1968-07-30
Apparatus for measuring the hardness of a material
SE10365/68A
SE331374B
(en)
1967-08-04
1968-07-31
FR1585245D
FR1585245A
(en)
1967-08-04
1968-08-02
DE19681773984
DE1773984A1
(en)
1967-08-04
1968-08-03
Device for testing the hardness of a material
US750061A
US3529467A
(en)
1967-08-04
1968-08-05
Apparatus for measuring the hardness of materials
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
GB35906/67A
GB1172776A
(en)
1967-08-04
1967-08-04
Improvements relating to Apparatus for Measuring the Hardness of the Materials.
Publications (1)
Publication Number
Publication Date
GB1172776A
true
GB1172776A
(en)
1969-12-03
Family
ID=10382860
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB35906/67A
Expired
GB1172776A
(en)
1965-08-10
1967-08-04
Improvements relating to Apparatus for Measuring the Hardness of the Materials.
Country Status (5)
Country
Link
US
(1)
US3529467A
(en)
DE
(1)
DE1773984A1
(en)
FR
(1)
FR1585245A
(en)
GB
(1)
GB1172776A
(en)
SE
(1)
SE331374B
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
CN115420445A
(en)
*
2022-11-03
2022-12-02
河南浩聚实业有限公司
Bridge detection device
Families Citing this family (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
NZ234200A
(en)
*
1990-06-22
1994-11-25
Nz Government
Testing firmness of fruit by measuring deceleration of driven impact member
US7243440B2
(en)
*
2004-10-06
2007-07-17
Black & Decker Inc.
Gauge for use with power tools
Family Cites Families (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3421364A
(en)
*
1965-08-04
1969-01-14
Gkn Group Services Ltd
Methods of and apparatus for measuring the hardness of materials
1967
1967-08-04
GB
GB35906/67A
patent/GB1172776A/en
not_active
Expired
1968
1968-07-31
SE
SE10365/68A
patent/SE331374B/xx
unknown
1968-08-02
FR
FR1585245D
patent/FR1585245A/fr
not_active
Expired
1968-08-03
DE
DE19681773984
patent/DE1773984A1/en
active
Pending
1968-08-05
US
US750061A
patent/US3529467A/en
not_active
Expired – Lifetime
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
CN115420445A
(en)
*
2022-11-03
2022-12-02
河南浩聚实业有限公司
Bridge detection device
Also Published As
Publication number
Publication date
FR1585245A
(en)
1970-01-16
SE331374B
(en)
1970-12-21
US3529467A
(en)
1970-09-22
DE1773984A1
(en)
1972-03-09
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Legal Events
Date
Code
Title
Description
1970-04-15
PS
Patent sealed [section 19, patents act 1949]
1979-12-28
PE
Patent expired
