GB1187420A - Electronic Speed and Distance Indicator System - Google Patents
Electronic Speed and Distance Indicator SystemInfo
- Publication number
- GB1187420A GB1187420A GB5449067A GB5449067A GB1187420A GB 1187420 A GB1187420 A GB 1187420A GB 5449067 A GB5449067 A GB 5449067A GB 5449067 A GB5449067 A GB 5449067A GB 1187420 A GB1187420 A GB 1187420A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- capacitor
- fed
- pulse
- vehicle
- 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
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/4802—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage by using electronic circuits in general
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Control Of Stepping Motors (AREA)
Abstract
1,187,420. Selective signalling. GENERAL MOTORS Ltd. 28 Nov., 1968 [30 Nov., 1967], No. 54490/67. Heading G4H. [Also in Division G1] The speed of a motor vehicle is measured by an 8-pole magnet mounted on the output shaft of the vehicle, associated with a reed switch which is thus closed eight times per revolution, each closure short-circuiting a capacitor C1 (Fig. 1) through diode D1. When the switch is open, capacitor C1 is charged to the battery voltage via R1, T1, T2, the charging pulse, of constant amplitude and duration, being amplified by transistors T1, T2 and fed to a coil L1, mounted perpendicularly to a coil L2 fed with a constant current, whereby a magnetic pointer (not shown) lines itself up with the direction of the resultant flux which is indicative of the average current through coil L1 and therefore proportional to the pulse frequency and the vehicle speed. The pulses fed to coil L1 are also used to charge a capacitor C2. After say 200 pulses the charge on C2 discharges through a uni-junction transistor T3 to feed a pulse to coil L3 of a stepping motor coupled to an odometer pointer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5449067A GB1187420A (en) | 1967-11-30 | 1967-11-30 | Electronic Speed and Distance Indicator System |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB5449067A GB1187420A (en) | 1967-11-30 | 1967-11-30 | Electronic Speed and Distance Indicator System |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1187420A true GB1187420A (en) | 1970-04-08 |
Family
ID=10471173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5449067A Expired GB1187420A (en) | 1967-11-30 | 1967-11-30 | Electronic Speed and Distance Indicator System |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1187420A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2368717A1 (en) * | 1976-10-23 | 1978-05-19 | Kienzle Apparate Gmbh | ELECTRONIC MEASURING AND COUNTING SYSTEM, ESPECIALLY FOR ROUTE RECORDERS |
-
1967
- 1967-11-30 GB GB5449067A patent/GB1187420A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2368717A1 (en) * | 1976-10-23 | 1978-05-19 | Kienzle Apparate Gmbh | ELECTRONIC MEASURING AND COUNTING SYSTEM, ESPECIALLY FOR ROUTE RECORDERS |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |