GB816176A - Improvements in and relating to average speed computers - Google Patents
Improvements in and relating to average speed computersInfo
- Publication number
- GB816176A GB816176A GB2640056A GB2640056A GB816176A GB 816176 A GB816176 A GB 816176A GB 2640056 A GB2640056 A GB 2640056A GB 2640056 A GB2640056 A GB 2640056A GB 816176 A GB816176 A GB 816176A
- Authority
- GB
- United Kingdom
- Prior art keywords
- resistor
- bridge
- changed
- average speed
- arms
- 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
- 238000005259 measurement Methods 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
- 230000001360 synchronised effect Effects 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P11/00—Measuring average value of speed
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Time Recorders, Dirve Recorders, Access Control (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Control Of Multiple Motors (AREA)
Abstract
816,176. Measuring average speed. GOODHEAD, R. A. Aug. 28, 19M [Aug. 29, 1956], No. 26400/56. Class 40 (1). A device for calculating the average speed of, a vehicle from a given datum point comprises a Wheatstone bridge having four resistance arms, two of these being automatically and remotely varied in proportion to the distance and time elapsed from the datum point, means for continuously balancing the bridge and an indicator coupled to the balancing means. In Fig. 1, the arms D and T are adjusted in steps by impulses obtained from the speedometer of the vehicle and from a clock or electronic counter respectively. The alternating output voltage from the bridge is amplified in V3 and applied to the grids of two thyratrons V1 and V2 whose anodes are fed with A.C. synchronized with the bridge supply. If the unbalance, voltage is large enough one or other of the relays L1, L2 is energized (depending on the phase sense of the unbalanced voltage) and changes the contacts YZ to drive the motor M and rebalance the bridge at S. The modification of Fig. 2 is designed to calculate the time lead or lag of the vehicle over a predetermined average speed. Here the resistor S is preset for a given speed, the small portion 28 of which can be inserted manually to change the preset value by ยข m.p.h. steps, and rebalancing is carried out on a portion of the arm T. In both circuits each of the arms D and T comprises in series one continuously variable resistor, one 16-step variable resistor changed' one step per revolution of the first and a further 16-step resistor changed one'step per revolution of the previous resistor. The display unit of the instrument has a pointer actuated by the rebalancing motor (either directly or via a selsyn or similar link) and four alternative scales, two for m.p.h. (changed by switching'in different resistors for S in Fig. 1) and two for minutes lead or lag (changed .by switching in different values for 30 in Fig. 2). The usual on/off switches are provided together with a control for returning the speed and time counters to zero before commencing a measurement, and also a switch 29 for inserting the fine resistor 28.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB816176A true GB816176A (en) | 1959-07-08 |
Family
ID=1740009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2640056A Expired GB816176A (en) | 1956-08-29 | Improvements in and relating to average speed computers |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB816176A (en) |
-
1956
- 1956-08-29 GB GB2640056A patent/GB816176A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB814758A (en) | Improvements in or relating to static pressure compensator | |
| US2887654A (en) | Electronic tachometer with selected expanded scale | |
| US2582400A (en) | Capacitance type liquid quantity gauge | |
| US2574656A (en) | True airspeed indicator | |
| US2505237A (en) | Rate of load change measuring instrument | |
| US3637996A (en) | Navigational distance computer | |
| ES470194A1 (en) | Process and a device for the indication of the extent of unbalance of a part to be balanced | |
| GB816176A (en) | Improvements in and relating to average speed computers | |
| US2609686A (en) | Air-speed integrator | |
| GB1478157A (en) | Method and apparatus for measuring and displaying the unbalance in a rotor | |
| US2618973A (en) | Air speed integrator | |
| US2860511A (en) | Fluid quantity measuring system | |
| US2780800A (en) | Remote indicator for scales | |
| SU684323A1 (en) | Automatic weight batchmater | |
| US3619579A (en) | Time of arrival and ground speed computer | |
| GB1081503A (en) | Three terminal bridged t. network for monitoring the operating speed of a motor | |
| SU485319A1 (en) | Aviation fuel gauge | |
| SU381907A1 (en) | ELECTRIC VEHICLE FUEL | |
| US3001405A (en) | Unbalance compensator | |
| GB914806A (en) | Improvements in or relating to fluid measuring apparatus | |
| US2813419A (en) | Apparatus for measuring the degree of supersaturation of boiling solutions | |
| GB781827A (en) | Improvements in or relating to the balancing of dynamically unbalanced bodies | |
| SU1525592A1 (en) | Device for measuring electric quantities | |
| GB829568A (en) | Improved frequency measuring system | |
| SU696278A1 (en) | Bridge-type measuring instrument |