GB438554A - Improved means for measuring the hardness of abrasive disks - Google Patents

Improved means for measuring the hardness of abrasive disks

Info

Publication number
GB438554A
GB438554A GB30924/34A GB3092434A GB438554A GB 438554 A GB438554 A GB 438554A GB 30924/34 A GB30924/34 A GB 30924/34A GB 3092434 A GB3092434 A GB 3092434A GB 438554 A GB438554 A GB 438554A
Authority
GB
United Kingdom
Prior art keywords
hardness
sheet
measuring
disc
schafer
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
GB30924/34A
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.)
ALWINE SCHAEFER
Original Assignee
ALWINE SCHAEFER
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 ALWINE SCHAEFER filed Critical ALWINE SCHAEFER
Publication of GB438554A publication Critical patent/GB438554A/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

438,554. Testing hardness of materials. BARTHEL, H., SCHAFER, G., and SCHAFER, A., (trading as KUGELFISCHER ERSTE AUTOMATISCHE GUSSTAHLKUGELFABRIK VORM. F. FISCHER), 134, Hauptbahnhofstrasse, Schweinfurt - on - Main, Germany. Oct. 27, 1934, No. 30924. Convention date, Nov. 3, 1933. [Class 106 (ii)] The hardness of an abrasive disc or plate is determined by laying a thin sheet of perforatable material such as sheet metal, cardboard, &c. on the disc and perforating the sheet and disc with a conical pin by a standardized driving force, and measuring the diameter of the hole made in the sheet.
GB30924/34A 1933-11-03 1934-10-27 Improved means for measuring the hardness of abrasive disks Expired GB438554A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE438554X 1933-11-03

Publications (1)

Publication Number Publication Date
GB438554A true GB438554A (en) 1935-11-19

Family

ID=6507180

Family Applications (1)

Application Number Title Priority Date Filing Date
GB30924/34A Expired GB438554A (en) 1933-11-03 1934-10-27 Improved means for measuring the hardness of abrasive disks

Country Status (1)

Country Link
GB (1) GB438554A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004083825A1 (en) * 2003-03-17 2004-09-30 Lg Electronics Inc. Apparatus and method for testing endurance of optical disc
WO2005026696A1 (en) * 2003-09-16 2005-03-24 Lg Electronics Inc. Apparatus and method for testing mechanical endurance of surface of optical disc.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004083825A1 (en) * 2003-03-17 2004-09-30 Lg Electronics Inc. Apparatus and method for testing endurance of optical disc
WO2005026696A1 (en) * 2003-09-16 2005-03-24 Lg Electronics Inc. Apparatus and method for testing mechanical endurance of surface of optical disc.

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