GB738606A - Improved hardness tester - Google Patents
Improved hardness testerInfo
- Publication number
- GB738606A GB738606A GB343853A GB343853A GB738606A GB 738606 A GB738606 A GB 738606A GB 343853 A GB343853 A GB 343853A GB 343853 A GB343853 A GB 343853A GB 738606 A GB738606 A GB 738606A
- Authority
- GB
- United Kingdom
- Prior art keywords
- indentor
- pan
- springs
- capacitor
- screw
- 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
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)
- Measuring Leads Or Probes (AREA)
Abstract
738,606. Hardness testing apparatus. WALLACE & CO., Ltd., H. W., and MORE, A. R. May 6, 1954 [Feb. 6, 1953], No. 3438/53. Class 106 (2). A hardness tester suitable for micro-hardness testing comprises means for indicating when an indentor is in a predetermined position in relation to a support which allows it to approach and indent material under test without friction between relatively movable surfaces, means to cause and means to measure relative movement between the support and the material in the line of movement of the indentor and means for applying a load to the indentor. In the embodiment of Fig. 1, an indentor 19 with weight pan 26 attached is supported in an adjustable head 4 by a helical spring 27 with leaf-springs 20, 21 allowing free vertical movement and its position with the leafsprings 20, 21 horizontal is indicated by a device 39 connected by a cable 38 to a variable capacitor with one plate 36 fixed in the head 4 and a movable plate 35 fixed to the indentor. The material to be tested is placed on a table 18 integral with a vertical plate 15 rounded at the bottom for line contact with a wedge 6 which can be horizontally adjusted by a screw 9, helical springs ensuring contact between co-acting parts and a dial gauge indicating the vertical displacement of the table allowing for the reduction factor due to the wedge. To accommodate samples of various sizes the head 4 is vertically adjustable through rack and pinion means controlled by knob 32. In carrying out a test the indentor 19 is adjusted by turning knob 32 almost to touch the sample on the table 18. The device 39 is then turned to zero position and the screw 9 turned to raise the sample until a deviation of the indicator signals that a slight retraction is necessary just to make contact. The dial gauge is then set to zero and the test weight placed on the pan 26. The indentor penetrates the specimen which is raised by the screw 9 until the device 39 indicates that the indicator is back to the level at which the leaf-springs 20, 21 are horizontal and unstressed and the dial gauge indicates the depth of penetration. The test weight is removed from the pan 26 and if the material recovers at all the indentor will be raised and after lowering the sample by screw 9 to restore the position of the indentor the dial gauge will indicate the degree of recovery. The embodiment of Fig. 3 is adapted for standing on the material under test the indentor passing freely through a hole in the base. The indentor is mounted on leaf-springs 50, 52 secured in an adjustable frame 57 urged upwards into contact with a wedge 47 itself urged upwards so that adjustment of the frame is effected by turning the screw 9 bearing on the wedge. Capacitor plates 35, 36 are attached to the indentor and frame respectively. The leaf-springs 50, 52 are maintained in tension by a compression rod 61 pointed at each end to engage shallow depressions in the indentor and in a spring 62, the rod 61 inclining slightly toward the indentor effectively resists the weight of the indentor and pan 18 over the very restricted range of movement required. If the pan and indentor point are interchanged the tester may be inverted. The movementsensitive device for indicating the position of the indentor may take many forms, e.g. one supporting spring may be in the form of a strain gauge of resistor type; the indentor may carry a core or a coil displaced in relation to a fixed coil to change the inductance or mutual inductance or a differential capacitor may be connected to two sides of a bridge circuit by the adjustment of which a nil reading is obtained. Preferably an aural indication is used in conjunction with a single variable capacitor in a circuit including a pair of double triode valves one part of each of which acts as a high-frequency oscillator while the other part of each acts as an amplifier. One triode is tuned by the capacitor in the head of the tester, plates 35, 36, and the other by a manuallycontrolled capacitor, the outputs of the oscillators being combined to produce audio beat frequency which is amplified and head phones or a loud-speaker are provided for obtaining the nul point aurally, leaving the operator free to observe the dial gauge.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB343853A GB738606A (en) | 1953-02-06 | 1953-02-06 | Improved hardness tester |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB343853A GB738606A (en) | 1953-02-06 | 1953-02-06 | Improved hardness tester |
Publications (1)
Publication Number | Publication Date |
---|---|
GB738606A true GB738606A (en) | 1955-10-19 |
Family
ID=9758329
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB343853A Expired GB738606A (en) | 1953-02-06 | 1953-02-06 | Improved hardness tester |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB738606A (en) |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3214967A (en) * | 1962-06-07 | 1965-11-02 | Feed Service Corp | Apparatus for testing meat and the like |
US3951601A (en) * | 1975-05-01 | 1976-04-20 | Decca Limited | Determination of softening temperatures for thin films |
GB2167568A (en) * | 1984-11-22 | 1986-05-29 | Eric Dransfield | Method and apparatus for the measurement of the hardness of compliant materials |
GB2211949A (en) * | 1987-11-05 | 1989-07-12 | Helmut Fischer Gmbh & Co | A hardness measuring instrument |
US5067346A (en) * | 1986-07-10 | 1991-11-26 | Commonwealth Scientific And Industrial Research Organization | Penetrating measuring instrument |
CN111337239A (en) * | 2020-04-14 | 2020-06-26 | 马鞍山市雨山冶金新材料有限公司 | Full-automatic steel-clad spring measuring instrument and measuring method |
CN111811720A (en) * | 2020-08-11 | 2020-10-23 | 钟祥新宇机电制造股份有限公司 | Manufacturing device and manufacturing method of adjusting and indicating dial |
CN113552164A (en) * | 2021-07-08 | 2021-10-26 | 台州市椒江建设工程质量检测中心有限公司 | Thermal deformation and Vicat softening point heat tester |
CN115290484A (en) * | 2022-09-29 | 2022-11-04 | 江苏培达塑料有限公司 | End hardness detection equipment of PVC pipe production line |
CN116879086A (en) * | 2023-09-07 | 2023-10-13 | 莱州华银试验仪器有限公司 | Bench device for rapidly positioning sclerometer |
CN118090495A (en) * | 2024-04-28 | 2024-05-28 | 奥来国信(北京)检测技术有限责任公司 | Equipment and method for detecting masonry mortar strength on site |
CN118080702A (en) * | 2024-04-29 | 2024-05-28 | 华翔金属科技股份有限公司 | Thermoforming side wall wedge forming equipment and forming method thereof |
-
1953
- 1953-02-06 GB GB343853A patent/GB738606A/en not_active Expired
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3214967A (en) * | 1962-06-07 | 1965-11-02 | Feed Service Corp | Apparatus for testing meat and the like |
US3951601A (en) * | 1975-05-01 | 1976-04-20 | Decca Limited | Determination of softening temperatures for thin films |
GB2167568A (en) * | 1984-11-22 | 1986-05-29 | Eric Dransfield | Method and apparatus for the measurement of the hardness of compliant materials |
US5067346A (en) * | 1986-07-10 | 1991-11-26 | Commonwealth Scientific And Industrial Research Organization | Penetrating measuring instrument |
GB2211949A (en) * | 1987-11-05 | 1989-07-12 | Helmut Fischer Gmbh & Co | A hardness measuring instrument |
GB2211949B (en) * | 1987-11-05 | 1992-04-22 | Helmut Fischer Gmbh & Co | Device for a hardness measuring instrument |
CN111337239B (en) * | 2020-04-14 | 2024-05-17 | 马鞍山市雨山冶金新材料有限公司 | Full-automatic steel ladle spring measuring instrument and measuring method |
CN111337239A (en) * | 2020-04-14 | 2020-06-26 | 马鞍山市雨山冶金新材料有限公司 | Full-automatic steel-clad spring measuring instrument and measuring method |
CN111811720A (en) * | 2020-08-11 | 2020-10-23 | 钟祥新宇机电制造股份有限公司 | Manufacturing device and manufacturing method of adjusting and indicating dial |
CN113552164A (en) * | 2021-07-08 | 2021-10-26 | 台州市椒江建设工程质量检测中心有限公司 | Thermal deformation and Vicat softening point heat tester |
CN113552164B (en) * | 2021-07-08 | 2024-04-05 | 台州市椒江建设工程质量检测中心有限公司 | Thermal deformation and Vicat softening point heat tester |
CN115290484A (en) * | 2022-09-29 | 2022-11-04 | 江苏培达塑料有限公司 | End hardness detection equipment of PVC pipe production line |
CN116879086A (en) * | 2023-09-07 | 2023-10-13 | 莱州华银试验仪器有限公司 | Bench device for rapidly positioning sclerometer |
CN116879086B (en) * | 2023-09-07 | 2023-11-14 | 莱州华银试验仪器有限公司 | Bench device for rapidly positioning sclerometer |
CN118090495A (en) * | 2024-04-28 | 2024-05-28 | 奥来国信(北京)检测技术有限责任公司 | Equipment and method for detecting masonry mortar strength on site |
CN118080702A (en) * | 2024-04-29 | 2024-05-28 | 华翔金属科技股份有限公司 | Thermoforming side wall wedge forming equipment and forming method thereof |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB738606A (en) | Improved hardness tester | |
JPS6122774B2 (en) | ||
US1709638A (en) | Testing machine | |
US2338338A (en) | Stiffness testing device | |
US1770046A (en) | Apparatus for measuring the hardness of materials | |
US4211013A (en) | Gauge | |
US1307775A (en) | Measubing instrtjment | |
US2463159A (en) | Instrument for testing density of materials | |
US3750467A (en) | Device to measure compressibility of soft materials | |
US2914937A (en) | Hardness tester | |
US2643545A (en) | Apparatus for measuring the hardness of materials | |
CN208588707U (en) | A kind of ultrasonic test bracket | |
US2467539A (en) | Spring tester | |
US2385958A (en) | Hardness measuring apparatus | |
JPS63100348A (en) | Property tester for food | |
DE1448467A1 (en) | Out-of-round measuring device | |
GB819971A (en) | Improvements in compression tester for resilient materials | |
GB353549A (en) | Apparatus for measuring the hardness of materials | |
SU13600A1 (en) | A device for determining the hardness of a graphite rod | |
CN210802350U (en) | Intelligent measuring device for mobile phone screen | |
US2474118A (en) | Compression testing apparatus | |
CN106248500A (en) | The beam deflection method utilizing covibration surveys experimental provision and the method for Young's modulus | |
CN207596383U (en) | A kind of lifting gear | |
TW201107734A (en) | Device for testing deformation of spring sheet | |
US1870415A (en) | Hardness testing machine |