GB694700A - Improvements in and relating to computing devices - Google Patents
Improvements in and relating to computing devicesInfo
- Publication number
- GB694700A GB694700A GB25827/51A GB2582751A GB694700A GB 694700 A GB694700 A GB 694700A GB 25827/51 A GB25827/51 A GB 25827/51A GB 2582751 A GB2582751 A GB 2582751A GB 694700 A GB694700 A GB 694700A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cards
- shaft
- resistance
- earthed
- windings
- 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
- 238000004804 winding Methods 0.000 abstract 4
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06G—ANALOGUE COMPUTERS
- G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
- G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
- G06G7/22—Arrangements for performing computing operations, e.g. operational amplifiers for evaluating trigonometric functions; for conversion of co-ordinates; for computations involving vector quantities
Abstract
694,700. Electric analogue calculating systems; variable contact resistance. BRITISH THOMSON-HOUSTON CO., Ltd. Nov. 5, 1951 [Nov. 3, 1950], No. 25827/51. Class 37. A sine cosine resolver potentiometer comprises a pair of non-linearly wound resistance cards 1, 2 whose edges are progressively notched so that the cards are formed as substantially semicircular rings, which are juxtaposed as a closed ring. Adjacent winding ends are joined and respectively connected to sources E of equal positive and negative voltage, and the centre-taps of the windings are earthed. A shaft 3 rotates a cruciform insulating member 4 whose arms carry 90 degree spaced brushes 5 slidable over the resistance cards along a circular path, and respectively interconnected to brushes 8 sliding over four slip rings 10 coaxial to the shaft, which are earthed through respective load resistances 11, across which voltages appear proportional to sin #, cos #, where # is the angle of shaft rotation. Resilient contacts 12, 13 connected to the appropriate winding ends bridge the junctions of the resistance cards to reduce wear, and the windings are distorted according to a given equation to compensate for the effect of the shunting load resistances on the variation law.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US195690A US2556972A (en) | 1950-11-03 | 1950-11-03 | Computing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB694700A true GB694700A (en) | 1953-07-22 |
Family
ID=22722368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25827/51A Expired GB694700A (en) | 1950-11-03 | 1951-11-05 | Improvements in and relating to computing devices |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US2556972A (en) |
| FR (1) | FR1044336A (en) |
| GB (1) | GB694700A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2653206A (en) * | 1951-09-26 | 1953-09-22 | James L Montgomery | Variable voltage device |
| US2764657A (en) * | 1953-05-01 | 1956-09-25 | Louis A Rosenthal | Sine-cosine generator |
| US2883502A (en) * | 1955-01-28 | 1959-04-21 | Us Gasket Company | Electrical resistors and other bodies with negligible temperature coefficient of expansion |
| US2902607A (en) * | 1955-03-14 | 1959-09-01 | Gen Dynamics Corp | Resistive interpolating function generator |
| US2964645A (en) * | 1956-10-19 | 1960-12-13 | Reeves Instrument Corp | Apparatus for producing spiral motion |
-
1950
- 1950-11-03 US US195690A patent/US2556972A/en not_active Expired - Lifetime
-
1951
- 1951-10-31 FR FR1044336D patent/FR1044336A/en not_active Expired
- 1951-11-05 GB GB25827/51A patent/GB694700A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US2556972A (en) | 1951-06-12 |
| FR1044336A (en) | 1953-11-17 |
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