GB886880A - Differential tachometer - Google Patents
Differential tachometerInfo
- Publication number
- GB886880A GB886880A GB26284/58A GB2628458A GB886880A GB 886880 A GB886880 A GB 886880A GB 26284/58 A GB26284/58 A GB 26284/58A GB 2628458 A GB2628458 A GB 2628458A GB 886880 A GB886880 A GB 886880A
- Authority
- GB
- United Kingdom
- Prior art keywords
- speed
- tachometer
- driven
- stator
- rotor
- 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
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P1/00—Details of instruments
- G01P1/04—Special adaptations of driving means
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/49—Devices characterised by the use of electric or magnetic means for measuring angular speed using eddy currents
- G01P3/495—Devices characterised by the use of electric or magnetic means for measuring angular speed using eddy currents where the indicating means responds to forces produced by the eddy currents and the generating magnetic field
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Abstract
886,880. Speedometers. KOLLSMAN INSTRUMENT CORPORATION. Aug. 15, 1958 [Oct. 16, 1957], No. 26284/58. Class 106 (3). A differential tachometer comprises a tachometer electric motor having a rotor 13 and a stator 14, one of which (A) is driven by a synchronous electric motor 12, the other (B) being driven in the opposite direction at a speed proportional to the speed of a rotating member 23, the component B driving a tachometer indicating means 18, which may be of the magnet-and-eddy current-disc type, in response to the difference in speed between the rotor 13 and stator 14. The arrangement is said to be particularly suitable for use with a jet engine, in which application the synchronous motor 12 would be driven at a speed proportional to full engine speed. At this speed the percentage error of the instrument is at a minimum (Fig. 3, not shown). The indicator dial is arranged so that the pointer assumes the same angular position whether the synchronous motor 12 is running or not.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US886880XA | 1957-10-16 | 1957-10-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB886880A true GB886880A (en) | 1962-01-10 |
Family
ID=22212843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB26284/58A Expired GB886880A (en) | 1957-10-16 | 1958-08-15 | Differential tachometer |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB886880A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108508228A (en) * | 2017-02-24 | 2018-09-07 | 北京金风科创风电设备有限公司 | Slow-speed shaft speed measuring system and method |
-
1958
- 1958-08-15 GB GB26284/58A patent/GB886880A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108508228A (en) * | 2017-02-24 | 2018-09-07 | 北京金风科创风电设备有限公司 | Slow-speed shaft speed measuring system and method |
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