GB805987A - Speed measuring device - Google Patents
Speed measuring deviceInfo
- Publication number
- GB805987A GB805987A GB459957A GB459957A GB805987A GB 805987 A GB805987 A GB 805987A GB 459957 A GB459957 A GB 459957A GB 459957 A GB459957 A GB 459957A GB 805987 A GB805987 A GB 805987A
- Authority
- GB
- United Kingdom
- Prior art keywords
- circuit
- voltage
- output
- impedance
- begins
- 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
- 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
- G01P3/46—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring amplitude of generated current or voltage
-
- 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
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
805,987. Voltage measurement. BALDWINLIMA-HAMILTON CORPORATION. Feb. 11, 1957, No. 4599/57. Class 37. [Also in Groups XIX and XXXVIII] The voltage output from a tacho-generator (not shown) is displayed on a valve voltmeter 50 through a circuit which compresses the higher part of the scale and gives the same order of accuracy over the whole range. The operation of the circuit depends on the fact that the generator output (connected via lines 32) varies in voltage and frequency simultaneously, both being proportional to the r.p.m. At low outputs C has a much higher impedance than R and the network has very little effect on the voltmeter reading. As the output increases C passes progressively more current and the meter begins to read low. When the impedance of C is much less than that of R the circuit C1R1 takes over as C1 begins to shunt R1, and at still higher outputs C2R2 becomes effective. Any number of such CR circuits may be added to extend the principle to still higher frequencies. Normal shunts R3 and R4 may also be included. The filters may contain inductive elements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB459957A GB805987A (en) | 1957-02-11 | 1957-02-11 | Speed measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB459957A GB805987A (en) | 1957-02-11 | 1957-02-11 | Speed measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB805987A true GB805987A (en) | 1958-12-17 |
Family
ID=9780203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB459957A Expired GB805987A (en) | 1957-02-11 | 1957-02-11 | Speed measuring device |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB805987A (en) |
-
1957
- 1957-02-11 GB GB459957A patent/GB805987A/en not_active Expired
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