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GB276776A - Improvements in or relating to apparatus for testing the physical properties of materials - Google Patents

Improvements in or relating to apparatus for testing the physical properties of materials

Info

Publication number
GB276776A
GB276776A GB1646226A GB1646226A GB276776A GB 276776 A GB276776 A GB 276776A GB 1646226 A GB1646226 A GB 1646226A GB 1646226 A GB1646226 A GB 1646226A GB 276776 A GB276776 A GB 276776A
Authority
GB
United Kingdom
Prior art keywords
balls
ball
cover plate
casing
knife edges
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
GB1646226A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB1646226A priority Critical patent/GB276776A/en
Publication of GB276776A publication Critical patent/GB276776A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/40Investigating hardness or rebound hardness

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)
  • Analysing Materials By The Use Of Radiation (AREA)

Abstract

276,776. Pelterie, R. Esnault-. June 30, 1926. Testing hardness of materials; testing friction. -The hardness is determined from the contact area between the specimens under a definite butting pressure. The balls 1, 2 to be tested are located the one 1 in a recess 3 in a rotatable member 4, and the other 2 in a recess 5 in one end of a plunger 6 guided on balls, the other end of the plunger being recessed to receive a thrust rod 8 receiving the pressure of a knife edge 10 formed in one with two aligned knife edges 11 and two flanges 12 housed in the head 14 of a beam 15 positioned between jaws on a cover plate 17 connected by bolts and nuts to a casing 18. Inside the casing is a sleeve 20 having a flange 20<1> between which and the cover plate 17 is a spring 22 which is strong enough to hold the cover plate against the nuts 19 in spite of the force exerted on the knife edges so that the cover plate can be set with its axis in coincidence with the axis of the casing and with the correct distance between the knife edges 11 and the ball 1 so that when the balls 1 and 2 are pressed together, the beam is horizontal. The forward part of the cover plate carries a bracket 23 supporting a pillar 24 on which pivots a weighted lever 25 connected by links 27 and knife edges to the beam 15 at the centre of gravity of the latter. The weight 26 exactly balances the dead weight of the beam. Channels 39 are provided through which a wire may be pushed to release the balls 1, 2, the pressure between which may be released by operating the lever 61 which presses against the flange 63 and also moves a rod 64 against an abutment 65 to ease the load on the lever. A microscope, adjustable in three directions at right angles by means of screws 32, 33, 34 is provided at the left hand for viewing the area of contact on the ball 1 after the carrier 4 has been turned through 180‹, light, tangentially to the ball, being admitted through a channel 38. The balls may be coated with silver sulphide for the test. A sliding rod 44 located half in the part 4 and half in the casing 18 is adapted to receive a film carrier 47 carrying at its lower edge a film on which is projected a shadow of the area of contact by X-rays projected through the channel 43 from a Rontgen ray apparatus located in the base of the hollow pillar 29. The rod 44 and film carrier 47 may be moved at right angles to the paper in order to make several exposures. To test friction three balls are used the carrier 4 being cut away to admit a ball between balls arranged as in Fig. 2, the third ball being supported by friction between the other two and carrying a light beam from the ends of which are hung scale pans in which weights are placed. The Hertz test mav be carried out by providing the plunger 6 with an extension so that the ball 2 may engage a quartz plate the Newton rings formed at the contact area being viewed through the microscope.
GB1646226A 1926-06-30 1926-06-30 Improvements in or relating to apparatus for testing the physical properties of materials Expired GB276776A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1646226A GB276776A (en) 1926-06-30 1926-06-30 Improvements in or relating to apparatus for testing the physical properties of materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1646226A GB276776A (en) 1926-06-30 1926-06-30 Improvements in or relating to apparatus for testing the physical properties of materials

Publications (1)

Publication Number Publication Date
GB276776A true GB276776A (en) 1927-09-08

Family

ID=10077760

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1646226A Expired GB276776A (en) 1926-06-30 1926-06-30 Improvements in or relating to apparatus for testing the physical properties of materials

Country Status (1)

Country Link
GB (1) GB276776A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1259119B (en) * 1962-02-01 1968-01-18 Kugelfischer G Schaefer & Co Device for measuring the elastic deformation within the Hertzian area
CN109030223A (en) * 2018-08-22 2018-12-18 黄志敏 Engine shift fork spring dynamometer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1259119B (en) * 1962-02-01 1968-01-18 Kugelfischer G Schaefer & Co Device for measuring the elastic deformation within the Hertzian area
CN109030223A (en) * 2018-08-22 2018-12-18 黄志敏 Engine shift fork spring dynamometer

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