GB867542A - Improvements in micrometer screw measuring means - Google Patents
Improvements in micrometer screw measuring meansInfo
- Publication number
- GB867542A GB867542A GB742357A GB742357A GB867542A GB 867542 A GB867542 A GB 867542A GB 742357 A GB742357 A GB 742357A GB 742357 A GB742357 A GB 742357A GB 867542 A GB867542 A GB 867542A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- micrometer
- wheel
- reluctance
- march
- 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
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B3/00—Measuring instruments characterised by the use of mechanical techniques
- G01B3/18—Micrometers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/001—Constructional details of gauge heads
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
867,542. Linear-dimension gauges; vernier equivalents. A.E.I. - JOHN THOMPSON NUCLEAR ENERGY CO. Ltd., SHEPHERD, G. H., and STAIT, D. P. March 6, 1958 [March 6, 1957], No. 7423/57. Class 106 (2). [Also in Group XXXV] A micrometer screw gauge incorporates a magnetic circuit, the reluctance of which changes as part of the micrometer is rotated, together with means for counting the changes in reluctance. The spindle 1 of the micrometer carries a toothed wheel 4 and an annular element 6 embraced by a coil 7. An element 8 carrying fingers 10 is separated from the element 6 by an air gap 5 in which the teeth of wheel 4 rotate. An alternating current of some 4000 cycles/sec. is applied to the coil 7 and causes a flux to circulate in the magnetic circuit 6, 8, 10. If one of the teeth of wheel 4 is coincident with a finger 10, a maximum flux will occur in that finger and will induce a voltage in a coil 13 mounted thereon. The number of pulses is counted by a known counter and a vernier indication is given by the relative magnitude of the voltages induced in the other coils 13.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB742357A GB867542A (en) | 1957-03-06 | 1957-03-06 | Improvements in micrometer screw measuring means |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB742357A GB867542A (en) | 1957-03-06 | 1957-03-06 | Improvements in micrometer screw measuring means |
Publications (1)
Publication Number | Publication Date |
---|---|
GB867542A true GB867542A (en) | 1961-05-10 |
Family
ID=9832840
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB742357A Expired GB867542A (en) | 1957-03-06 | 1957-03-06 | Improvements in micrometer screw measuring means |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB867542A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2413997A1 (en) * | 1973-03-22 | 1974-09-26 | Inoue Japax Res | MEASURING INSTRUMENT |
CN107726941A (en) * | 2017-11-09 | 2018-02-23 | 江西凯润达精密仪器有限公司 | Magnetic waterproof screw micrometer |
-
1957
- 1957-03-06 GB GB742357A patent/GB867542A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2413997A1 (en) * | 1973-03-22 | 1974-09-26 | Inoue Japax Res | MEASURING INSTRUMENT |
CN107726941A (en) * | 2017-11-09 | 2018-02-23 | 江西凯润达精密仪器有限公司 | Magnetic waterproof screw micrometer |
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