GB817971A - Improvements in or relating to attachment devices for hardness testing instruments - Google Patents
Improvements in or relating to attachment devices for hardness testing instrumentsInfo
- Publication number
- GB817971A GB817971A GB3418956A GB3418956A GB817971A GB 817971 A GB817971 A GB 817971A GB 3418956 A GB3418956 A GB 3418956A GB 3418956 A GB3418956 A GB 3418956A GB 817971 A GB817971 A GB 817971A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pole pieces
- movable
- pieces
- relating
- electromagnets
- 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
Links
- 238000007542 hardness measurement Methods 0.000 title 1
- 238000007373 indentation Methods 0.000 abstract 1
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
817,971. Electromagnets. PENETRASCOPE Ltd. Nov. 4, 1957 [Nov. 8, 1956], No. 34189/56. Class 35. [Also in Groups XIX and XXV] An attachment device, for a hardness tester 10 of the indentation type, comprises a frame 32 in which the tester can be adjustably mounted so as to be movable to and from the test piece 43, and an electromagnet or electromagnets 33 having at least three spaced-apart pole pieces 50, 51, at least one of which is movably mounted. Each electromagnet 33 comprises two pole pieces 50, 51, of which one, 51, is movable, two core pieces 52, 53, and a magnetic yoke member 62. Energization of coils 60-64 forms a closed magnetic circuit comprising the yoke 62, the cores 52, 53, the poles 50, 51 and the test piece 43. The pole pieces 50, 51 are removable and may be replaced by pieces having different shapes, the movable pole pieces being held in an adjusted position by a cam 70. Specifications 668,415 and 714,164, [both in Group XIX], are referred to.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB817971A true GB817971A (en) | 1959-08-12 |
Family
ID=1743797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3418956A Expired GB817971A (en) | 1956-11-08 | Improvements in or relating to attachment devices for hardness testing instruments |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB817971A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3147614A (en) * | 1960-06-16 | 1964-09-08 | Robert C Scott | Adjustable pole extensions for use in electromagnetic hardness testers |
| CN107907651A (en) * | 2017-11-23 | 2018-04-13 | 中国工程物理研究院电子工程研究所 | It can prevent the safety anti-explosive test device of maloperation |
-
1956
- 1956-11-08 GB GB3418956A patent/GB817971A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3147614A (en) * | 1960-06-16 | 1964-09-08 | Robert C Scott | Adjustable pole extensions for use in electromagnetic hardness testers |
| CN107907651A (en) * | 2017-11-23 | 2018-04-13 | 中国工程物理研究院电子工程研究所 | It can prevent the safety anti-explosive test device of maloperation |
| CN107907651B (en) * | 2017-11-23 | 2023-06-30 | 中国工程物理研究院电子工程研究所 | Safe explosion-proof testing device capable of preventing misoperation |
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