US5122733A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Variable color digital multimeter
Assignee: Individual
•
Filing: 1990-12-14
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Granted: 1992-06-16
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Expires: 2010-12-14
Abstract
Abstract A multimeter with variable color digital display indicates measured values in a digital format and in a variable color. The multimeter includes a color control circuit for controlling the color of the digital display in accordance with the measurement quantity, method, unit, mode, function, range, location, modifier, control, limits, and the like. A color converter circuit is disclosed for converting analog voltage to variable color.
Inventors
- 👤 Karel Havel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:50
CPC Classifications
G; G01; G01R; G01R13/00; G01R13/20; G01R13/22; G01R13/26; G01R13/02; G01R13/40; G01R13/404; G01R13/405; G01R15/00; G01R15/12; G01R15/125; G09; G09G; G09G3/00; G09G3/04; G09G3/06; G09G3/12; G09G3/14; G09G2300/00; G09G2300/04; G09G2300/0439; G09G2300/0452; G09G2310/00; G09G2310/02; G09G2310/0264; G09G2310/0275; G09G2320/00; G09G2320/06; G09G2320/0666
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
67 words
An apparatus for simultaneously displaying measured values of a first quantity and of a second quantity, the apparatus comprising: means for measuring a first quantity; means for displaying in a selective color a digital indication of the measured value of the first quantity; means for measuring a second quantity; means for controlling color of said digital indication in accordance with the measured value of the second quantity.
Claim 2
Independent Claim
67 words
An apparatus for simultaneously displaying measured values of a first quantity and of a second quantity, the apparatus comprising: means for measuring a first quantity; means for displaying in a selective color a digital indication of the measured value of the first quantity; means for measuring a second quantity; means for controlling color of said digital indication in accordance with the measured value of the second quantity.
Claim 3
Dependent Claim
64 words
An apparatus as defined in claim 1 wherein: said means for displaying include an input for controlling color of said indication; said means for controlling include an output for developing an output signal in accordance with the measured value of the second quantity; said output being operatively coupled to said input for controlling color of said digital indication in accordance with said output signal.
Claim 4
Dependent Claim
48 words
An apparatus as defined in claim 1 wherein: said means for controlling include a comparator for comparing the measured value of the second quantity with a predetermined limit and for developing an output signal accordingly; said output signal being operative to control color of said means for displaying.
Claim 5
Independent Claim
59 words
A method of simultaneously displaying measured values of a first quantity and of a second quantity, the method comprising: measuring the first quantity; displaying in a selective color a digital indication of the measured value of the first quantity; measuring the second quantity; controlling color of said digital indication in accordance with the measured value of the second quantity.
Claim 6
Independent Claim
59 words
A method of simultaneously displaying measured values of a first quantity and of a second quantity, the method comprising: measuring the first quantity; displaying in a selective color a digital indication of the measured value of the first quantity; measuring the second quantity; controlling color of said digital indication in accordance with the measured value of the second quantity.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-06-16 | 1995-12-16 | 1996-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-16 | 1999-12-16 | 2000-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-16 | 2003-12-16 | 2004-06-16 | $7700.00 | Window Closed / Lapsed |