| 发明名称 |
MICROHARDNESS TESTER REGULATED BY A MAGNETOSTRICTIVE CONTROL ARRANGEMENT |
| 摘要 |
A hardness testing device is disclosed which includes a driving motor, an indenter and a force compensating mechanism for regulating the force transmitted to the indenter from the driving motor.
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| 申请公布号 |
US3693417(A) |
申请公布日期 |
1972.09.26 |
| 申请号 |
USD3693417 |
申请日期 |
1970.06.25 |
| 申请人 |
BELL TELEPHONE LAB. INC. |
发明人 |
JOSEPH HENRY FRITZ;THOMAS GERALD JOHNS |
| 分类号 |
G01N3/06;G01N3/42;(IPC1-7):G01N3/42 |
主分类号 |
G01N3/06 |
| 代理机构 |
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代理人 |
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| 地址 |
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