GB541122A - Improved method of and apparatus for determining the surface hardness or resistance to scratching of smooth or polished surfaces of materials, or of coated objects or materials - Google Patents

Improved method of and apparatus for determining the surface hardness or resistance to scratching of smooth or polished surfaces of materials, or of coated objects or materials

Info

Publication number
GB541122A
GB541122A GB1017440A GB1017440A GB541122A GB 541122 A GB541122 A GB 541122A GB 1017440 A GB1017440 A GB 1017440A GB 1017440 A GB1017440 A GB 1017440A GB 541122 A GB541122 A GB 541122A
Authority
GB
United Kingdom
Prior art keywords
specimen
materials
stylus
pillar
hardness
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
GB1017440A
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.)
ARNETT RICHARDSON DUNTON
Metropolitan Vickers Electrical Co Ltd
Original Assignee
ARNETT RICHARDSON DUNTON
Metropolitan Vickers Electrical Co 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.)
Filing date
Publication date
Application filed by ARNETT RICHARDSON DUNTON, Metropolitan Vickers Electrical Co Ltd filed Critical ARNETT RICHARDSON DUNTON
Priority to GB1017440A priority Critical patent/GB541122A/en
Publication of GB541122A publication Critical patent/GB541122A/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
    • G01N3/46—Investigating hardness or rebound hardness by performing impressions under a steady load by indentors, e.g. sphere, pyramid the indentors performing a scratching movement

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

541,122. Testing hardness of materials. CRADICK, M. J., DUNTON, A. R., and METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. June 11, 1940, No. 10174. [Class 106 (ii)] Comprises a scratch test in which the specimen is reciprocated in the same track under a loaded stylus and the extent of movement of the stylus after a time or the time to make a predetermined movement being taken as a measure of the hardness. The specimen 3 is clamped between upper and lower plates constituting a table 3 supported by pillars 10 from a plate 9 oscillated about a vertical axis by pin and slot 7, 8 from a gravity returned slide 6 reciprocated by a cam 5 driven by a motor 4. A stylus 11 carried by an arm 12 having pan 13 for loading weights and and pivoted about an horizontal axis 14 and pillar 15 extends downward to engage the specimen 3 through an arcuate slot 19 in the upper clamping plate. The pillar has secured to it a radial arm 16 along which a clamp 17 can be adjusted the clamp being attached to a spring 18 anchored to a fixed point. As the specimen is oscillated under the stylus the friction increases and the pillar 15 is increasingly deflected about its axis against the influence of the spring 18. When the deflection, reaches a predetermined amount, the arm 12 engages a stop 20 and trips a switch to stop the motor. The time taken to reach this deflection is a measure of hardness.
GB1017440A 1940-06-11 1940-06-11 Improved method of and apparatus for determining the surface hardness or resistance to scratching of smooth or polished surfaces of materials, or of coated objects or materials Expired GB541122A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1017440A GB541122A (en) 1940-06-11 1940-06-11 Improved method of and apparatus for determining the surface hardness or resistance to scratching of smooth or polished surfaces of materials, or of coated objects or materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1017440A GB541122A (en) 1940-06-11 1940-06-11 Improved method of and apparatus for determining the surface hardness or resistance to scratching of smooth or polished surfaces of materials, or of coated objects or materials

Publications (1)

Publication Number Publication Date
GB541122A true GB541122A (en) 1941-11-13

Family

ID=9962911

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1017440A Expired GB541122A (en) 1940-06-11 1940-06-11 Improved method of and apparatus for determining the surface hardness or resistance to scratching of smooth or polished surfaces of materials, or of coated objects or materials

Country Status (1)

Country Link
GB (1) GB541122A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113109193A (en) * 2021-04-26 2021-07-13 东华大学 Device and method for detecting pet-grabbing resistance of textile fabric

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113109193A (en) * 2021-04-26 2021-07-13 东华大学 Device and method for detecting pet-grabbing resistance of textile fabric

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