GB1306022A - - Google Patents
Info
- Publication number
- GB1306022A GB1306022A GB1306022DA GB1306022A GB 1306022 A GB1306022 A GB 1306022A GB 1306022D A GB1306022D A GB 1306022DA GB 1306022 A GB1306022 A GB 1306022A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pair
- coils
- jan
- members
- temperature sensitive
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
1306022 Measuring speed electrically INTERNATIONAL COMPUTERS Ltd 19 Jan 1972 [19 Jan 1971] 6501/71 Heading G1N A velocity transducer comprises a pair of members 24, 25 fixed relatively to one another providing a pair of unlike poles N, S, which are coupled by a magnetic field.which cuts a pair of elongated parallel coils 22, 23 so that relative movement between the members and the coils induces signals in the coils which are additive to give an output indicative of relative velocity. P.T.F.E. tubes over the magnets provide low friction movement. The magnetic poles may be provided by magnets of cobalt-steel, Alcomax (R.T.M.) or barium ferrite. If the material is temperature sensitive compensation may be provided by feeding the output to a variable gain amplifier which includes a temperature sensitive feedback loop incorporating copper wire resistor. The arrangement is associated with a disc store head drive unit, Fig. 3 (not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB650171 | 1971-01-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1306022A true GB1306022A (en) | 1973-02-07 |
Family
ID=9815661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1306022D Expired GB1306022A (en) | 1971-01-19 | 1971-01-19 |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR2122428B3 (en) |
| GB (1) | GB1306022A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3011856A1 (en) * | 1979-03-05 | 1980-10-09 | Digital Equipment Corp | Linear speed transducer for disc head controller - subtracts noise components of two induced coil movement signals |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4154489A (en) * | 1977-06-15 | 1979-05-15 | Cambridge Thermionic Corporation | Rate responsive control for magnetic suspension system |
| US4260914A (en) * | 1979-03-28 | 1981-04-07 | Digital Equipment Corporation | Differential linear velocity transducer |
| JPS62119461A (en) * | 1985-11-19 | 1987-05-30 | Toshiba Corp | Speed detector |
-
1971
- 1971-01-19 GB GB1306022D patent/GB1306022A/en not_active Expired
-
1972
- 1972-01-06 FR FR7200378A patent/FR2122428B3/fr not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3011856A1 (en) * | 1979-03-05 | 1980-10-09 | Digital Equipment Corp | Linear speed transducer for disc head controller - subtracts noise components of two induced coil movement signals |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2122428B3 (en) | 1974-12-20 |
| AU3752871A (en) | 1973-07-05 |
| FR2122428A3 (en) | 1972-09-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |