GB1111596A - Improvements relating to display devices - Google Patents
Improvements relating to display devicesInfo
- Publication number
- GB1111596A GB1111596A GB2925965A GB2925965A GB1111596A GB 1111596 A GB1111596 A GB 1111596A GB 2925965 A GB2925965 A GB 2925965A GB 2925965 A GB2925965 A GB 2925965A GB 1111596 A GB1111596 A GB 1111596A
- Authority
- GB
- United Kingdom
- Prior art keywords
- frequency
- gate
- cycle
- pulses
- frequencies
- 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
- 230000001419 dependent effect Effects 0.000 abstract 2
- DNISEZBAYYIQFB-PHDIDXHHSA-N (2r,3r)-2,3-diacetyloxybutanedioic acid Chemical compound CC(=O)O[C@@H](C(O)=O)[C@H](C(O)=O)OC(C)=O DNISEZBAYYIQFB-PHDIDXHHSA-N 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Frequencies, Analyzing Spectra (AREA)
Abstract
1,111,596. Measuring frequencies. DAWE INSTRUMENTS Ltd. 9 July, 1965, No. 29259/65. Heading G4H. Apparatus for evaluating a frequency which is approximately known comprises gating means enabled for exactly one cycle of the frequency so that pulses of a predetermined frequency are passed to a counter counting down from a predetermined number, the count which, at the end of the cycle, represents the input frequency being displayed. In the form shown the input frequency after being shaped to square wave form is applied to a first gate 9 enabled by a bi-stable device 8 under the control of a display timer 1. The start of a negative output pulse from gate 9 sets a further bi-stable device 11 and the start of the next negative pulse resets it so that a gate 12 is open for precisely one cycle to pass pulses from an oscillator 13, their frequency being determined by the formula K - where T is the range of the periods of the T frequencies for which the apparatus is to be used, e.g. 1/ 45 - 1/ 55 and K is the difference between the frequencies multiplied by a scale factor dependent on the number of decades in the counter, e.g. (55 - 45) x 10. The counters to which the reference pulses are passed count down from a number dependent on the frequency of the reference pulses and the approximate value of the unknown frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2925965A GB1111596A (en) | 1965-07-09 | 1965-07-09 | Improvements relating to display devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2925965A GB1111596A (en) | 1965-07-09 | 1965-07-09 | Improvements relating to display devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1111596A true GB1111596A (en) | 1968-05-01 |
Family
ID=10288676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2925965A Expired GB1111596A (en) | 1965-07-09 | 1965-07-09 | Improvements relating to display devices |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1111596A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3108848A1 (en) * | 1980-03-10 | 1982-01-14 | Imed Corp., 92131 San Diego, Calif. | DROP METER |
| RU2171474C1 (en) * | 2000-04-17 | 2001-07-27 | Файрушин Ринат Айдубаевич | Gear forming measurement time interval for digital tachometers |
-
1965
- 1965-07-09 GB GB2925965A patent/GB1111596A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3108848A1 (en) * | 1980-03-10 | 1982-01-14 | Imed Corp., 92131 San Diego, Calif. | DROP METER |
| RU2171474C1 (en) * | 2000-04-17 | 2001-07-27 | Файрушин Ринат Айдубаевич | Gear forming measurement time interval for digital tachometers |
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