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GB1515574A - Device for indicating the presence of a value within a predetermined range - Google Patents

Device for indicating the presence of a value within a predetermined range

Info

Publication number
GB1515574A
GB1515574A GB3630375A GB3630375A GB1515574A GB 1515574 A GB1515574 A GB 1515574A GB 3630375 A GB3630375 A GB 3630375A GB 3630375 A GB3630375 A GB 3630375A GB 1515574 A GB1515574 A GB 1515574A
Authority
GB
United Kingdom
Prior art keywords
transistors
lamp
sept
voltage
amplifiers
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
GB3630375A
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs GmbH
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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Publication of GB1515574A publication Critical patent/GB1515574A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G01R19/16566—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533
    • G01R19/1659—Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups G01R19/16504, G01R19/16528, G01R19/16533 to indicate that the value is within or outside a predetermined range of values (window)

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

1515574 Measuring voltage LICENTIA PATENT VERWALTUNGS GmbH 3 Sept 1975 [10 Sept 1974] 36303/75 Heading G1U In a voltage monitoring circuit the input voltage, e.g. that developed across a load driven by a vehicle battery, is applied to a first operational amplifier AR1 of fixed gain, and thence to the further operational amplifiers AR2, AR3 which receive as reference inputs voltages derived from the supply rail via dividers R4, R5 and R6, R7 respectively setting upper and lower tolerance levels. The outputs from the amplifiers AR2, AR3 switch transistors Q2 (directly) and Q3 (via a further transistor Q1) so that an indicator lamp DS1 only lights when the input level is within the tolerance band and both transistors are on. A resistor R8 is connected in series with the lamp DS1 and in parallel with the switching transistors so that the lamp filament is pre-warmed (without glowing) when the transistors Q2, Q3 are off to reduce the turn-on current.
GB3630375A 1974-09-10 1975-09-03 Device for indicating the presence of a value within a predetermined range Expired GB1515574A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19742443274 DE2443274B2 (en) 1974-09-10 1974-09-10 DEVICE FOR DISPLAYING COMPLIANCE WITH SPECIFIED TOLERANCE LIMITS OF SMALL ELECTRICAL OR PHYSICAL SIZES

Publications (1)

Publication Number Publication Date
GB1515574A true GB1515574A (en) 1978-06-28

Family

ID=5925327

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3630375A Expired GB1515574A (en) 1974-09-10 1975-09-03 Device for indicating the presence of a value within a predetermined range

Country Status (2)

Country Link
DE (1) DE2443274B2 (en)
GB (1) GB1515574A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5503036A (en) * 1994-05-09 1996-04-02 Ciba Corning Diagnostics Corp. Obstruction detection circuit for sample probe
US5723795A (en) 1995-12-14 1998-03-03 Abbott Laboratories Fluid handler and method of handling a fluid
US5915282A (en) 1995-12-14 1999-06-22 Abbott Laboratories Fluid handler and method of handling a fluid
US5965828A (en) 1995-12-14 1999-10-12 Abbott Laboratories Fluid handler and method of handling a fluid
WO2004055968A3 (en) * 2002-12-17 2004-11-25 Koninkl Philips Electronics Nv Temperature compensated r-c oscillator

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3412734C2 (en) * 1984-04-05 1986-11-27 Ifm Electronic Gmbh, 4300 Essen Circuit arrangement for evaluating the impedance value, which is normally between a minimum value and a maximum value, of an indicator impedance connected on the input side
IT1206836B (en) * 1987-01-09 1989-05-11 Fiat Auto Spa PROCEDURE AND DEVICE FOR THE DETECTION AND REPORTING OF OPERATING ANOMALIES OF THE IGNITION SYSTEM OF INTERNAL COMBUSTION ENGINES, PARTICULARLY FOR VEHICLES EQUIPPED WITH A CATALYTIC EXHAUST

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5503036A (en) * 1994-05-09 1996-04-02 Ciba Corning Diagnostics Corp. Obstruction detection circuit for sample probe
US5723795A (en) 1995-12-14 1998-03-03 Abbott Laboratories Fluid handler and method of handling a fluid
US5915282A (en) 1995-12-14 1999-06-22 Abbott Laboratories Fluid handler and method of handling a fluid
US5965828A (en) 1995-12-14 1999-10-12 Abbott Laboratories Fluid handler and method of handling a fluid
WO2004055968A3 (en) * 2002-12-17 2004-11-25 Koninkl Philips Electronics Nv Temperature compensated r-c oscillator

Also Published As

Publication number Publication date
DE2443274B2 (en) 1976-09-16
DE2443274A1 (en) 1976-03-25

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed