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GB1429621A - Display systems - Google Patents

Display systems

Info

Publication number
GB1429621A
GB1429621A GB241975A GB241975A GB1429621A GB 1429621 A GB1429621 A GB 1429621A GB 241975 A GB241975 A GB 241975A GB 241975 A GB241975 A GB 241975A GB 1429621 A GB1429621 A GB 1429621A
Authority
GB
United Kingdom
Prior art keywords
counter
difference
phase
frequency
latch
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
Application number
GB241975A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mcmullin T A
Original Assignee
Mcmullin T A
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mcmullin T A filed Critical Mcmullin T A
Priority to GB241975A priority Critical patent/GB1429621A/en
Publication of GB1429621A publication Critical patent/GB1429621A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R13/00—Arrangements for displaying electric variables or waveforms
    • G01R13/02—Arrangements for displaying electric variables or waveforms for displaying measured electric variables in digital form

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Frequencies, Analyzing Spectra (AREA)

Abstract

1429621 Displays; printers T A McMULLIN 20 Jan 1975 2419/75 Heading G4H [Also in Division H3] To produce relatively steady digital indication of the value of a noisy electrical signal, repeatedly digitized, a latch 13 retains the latest digital result for comparison with the content of a display register 18 which is adjusted to reduce any difference. The rate of adjustment may depend on the magnitude of the difference and/or the time interval for which the difference has existed. As shown, the difference controls the frequency of a pulse generator 16 feeding the register 18, which is an up/down counter, via an intermediate counter 17. When zero difference is reached, counter 17 is reset to a number in the middle of its counting range, thereby providing "dead space". Display 20 may be seven segment or a printer. Digital phase-meter.-In a radio range receiver, phase-locked loops 2, 4 produce signal phase and reference phase square waveforms from which bi-stable circuit 5 derives pulse width signals which gate, 8, clock pulses (derived by multiplying the frequency of the reference waveform by 360) into a counter 10. Dividers 9, 11 provide averaging over N cycles, output from divider 11 causing transfer of the content of counter 10 to the latch 13 and resetting of the counter 10 to zero. The input signal may alternatively be voltage or frequency.
GB241975A 1975-01-20 1975-01-20 Display systems Expired GB1429621A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB241975A GB1429621A (en) 1975-01-20 1975-01-20 Display systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB241975A GB1429621A (en) 1975-01-20 1975-01-20 Display systems

Publications (1)

Publication Number Publication Date
GB1429621A true GB1429621A (en) 1976-03-24

Family

ID=9739238

Family Applications (1)

Application Number Title Priority Date Filing Date
GB241975A Expired GB1429621A (en) 1975-01-20 1975-01-20 Display systems

Country Status (1)

Country Link
GB (1) GB1429621A (en)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2468911A1 (en) * 1979-11-05 1981-05-08 Outboard Marine Corp MEASURING CIRCUIT COMPRISING A MEASURING APPARATUS WITH DIGITAL DISPLAY WITH VARIABLE PACE UPDATE, IN PARTICULAR A TACHOMETER
US7880028B2 (en) 2006-07-14 2011-02-01 Invista North America S.A R.L. Process for making 3-pentenenitrile by hydrocyanation of butadiene
US7897801B2 (en) 2003-05-12 2011-03-01 Invista North America S.A R.L. Process for the preparation of dinitriles
US7919646B2 (en) 2006-07-14 2011-04-05 Invista North America S.A R.L. Hydrocyanation of 2-pentenenitrile
US7973174B2 (en) 2005-10-18 2011-07-05 Invista North America S.A.R.L. Process of making 3-aminopentanenitrile
US7977502B2 (en) 2008-01-15 2011-07-12 Invista North America S.A R.L. Process for making and refining 3-pentenenitrile, and for refining 2-methyl-3-butenenitrile
US8088943B2 (en) 2008-01-15 2012-01-03 Invista North America S.A R.L. Hydrocyanation of pentenenitriles
US8101790B2 (en) 2007-06-13 2012-01-24 Invista North America S.A.R.L. Process for improving adiponitrile quality
US8178711B2 (en) 2006-03-17 2012-05-15 Invista North America S.A R.L. Method for the purification of triorganophosphites by treatment with a basic additive
US8247621B2 (en) 2008-10-14 2012-08-21 Invista North America S.A.R.L. Process for making 2-secondary-alkyl-4,5-di-(normal-alkyl)phenols
US8338636B2 (en) 2009-08-07 2012-12-25 Invista North America S.A R.L. Hydrogenation and esterification to form diesters
US8373001B2 (en) 2003-02-10 2013-02-12 Invista North America S.A R.L. Method of producing dinitrile compounds
US8906334B2 (en) 2007-05-14 2014-12-09 Invista North America S.A R.L. High efficiency reactor and process

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2468911A1 (en) * 1979-11-05 1981-05-08 Outboard Marine Corp MEASURING CIRCUIT COMPRISING A MEASURING APPARATUS WITH DIGITAL DISPLAY WITH VARIABLE PACE UPDATE, IN PARTICULAR A TACHOMETER
US8373001B2 (en) 2003-02-10 2013-02-12 Invista North America S.A R.L. Method of producing dinitrile compounds
US7897801B2 (en) 2003-05-12 2011-03-01 Invista North America S.A R.L. Process for the preparation of dinitriles
US7973174B2 (en) 2005-10-18 2011-07-05 Invista North America S.A.R.L. Process of making 3-aminopentanenitrile
US8178711B2 (en) 2006-03-17 2012-05-15 Invista North America S.A R.L. Method for the purification of triorganophosphites by treatment with a basic additive
US7880028B2 (en) 2006-07-14 2011-02-01 Invista North America S.A R.L. Process for making 3-pentenenitrile by hydrocyanation of butadiene
US7919646B2 (en) 2006-07-14 2011-04-05 Invista North America S.A R.L. Hydrocyanation of 2-pentenenitrile
US8394981B2 (en) 2006-07-14 2013-03-12 Invista North America S.A R.L. Hydrocyanation of 2-pentenenitrile
US8906334B2 (en) 2007-05-14 2014-12-09 Invista North America S.A R.L. High efficiency reactor and process
US8101790B2 (en) 2007-06-13 2012-01-24 Invista North America S.A.R.L. Process for improving adiponitrile quality
US8088943B2 (en) 2008-01-15 2012-01-03 Invista North America S.A R.L. Hydrocyanation of pentenenitriles
US7977502B2 (en) 2008-01-15 2011-07-12 Invista North America S.A R.L. Process for making and refining 3-pentenenitrile, and for refining 2-methyl-3-butenenitrile
US8247621B2 (en) 2008-10-14 2012-08-21 Invista North America S.A.R.L. Process for making 2-secondary-alkyl-4,5-di-(normal-alkyl)phenols
US8338636B2 (en) 2009-08-07 2012-12-25 Invista North America S.A R.L. Hydrogenation and esterification to form diesters

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee