US4592003A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measuring circuit device
Assignee: Omron Corp
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Filing: 1983-08-10
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Granted: 1986-05-27
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Expires: 2003-08-10
Abstract
Abstract A measuring circuit device comprising a measuring circuit, a display associated with the measuring circuit for displaying data generated by the measuring circuit, a display test circuit for testing the display, a performance test circuit associated with the measuring circuit for actuating the measuring circuit to display predetermined reference measured data by the display, a switch for initiating operation of the device, a switch circuit which upon actuation of the switch actuates the display test circuit and the performance test circuit, and which in a predetermined time period, initiates a measuring operation by the measuring circuit.
Inventors
- 👤 Toshiyuki Kobayashi
- 👤 Takao Ohta
- 👤 Masatsugu Miura
- 👤 Hidetoshi Matsumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:19
CPC Classifications
G; G01; G01K; G01K7/00; G01K7/16; G01K7/22; G01K7/24; G01K7/245; G01K1/00; G01K1/02; G01K1/028
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
129 words
A measuring circuit device comprising: measuring circuit means, display means for displaying data generated from the measuring circuit means, display test circuit means for testing said display means and providing a visual display by said display means of said test, performance test circuit means for actuating said measuring circuit means to display predetermined reference measured data by said display means, switching means for initiating operation of said device, and switching circuit means responsive to actuation of said switching means for actuating said display test circuit means and said performance test circuit means, and for initiating a measuring operation by said measuring circuit means after said display test circuit means tests said display means and said performance test circuit actuates said measuring circuit means to display said predetermined reference data.
Claim 2
Dependent Claim
129 words
A measuring circuit device comprising: measuring circuit means, display means for displaying data generated from the measuring circuit means, display test circuit means for testing said display means and providing a visual display by said display means of said test, performance test circuit means for actuating said measuring circuit means to display predetermined reference measured data by said display means, switching means for initiating operation of said device, and switching circuit means responsive to actuation of said switching means for actuating said display test circuit means and said performance test circuit means, and for initiating a measuring operation by said measuring circuit means after said display test circuit means tests said display means and said performance test circuit actuates said measuring circuit means to display said predetermined reference data.
Claim 3
Dependent Claim
123 words
A measuring circuit device according to claim 1, in which said measuring circuit means comprises a sensor for sensing a parameter to be measured, a reference component, a variable frequency oscillator having an input to which one of said sensor and reference component can be connected to determine the oscillating frequency, means for switchably connecting one of a sensor and a reference component to the oscillator input, comparing means for comparing a frequency produced by said oscillator when said sensor is connected thereto with a frequency produced when said reference component is connected thereto, and means responsive to an output of said comparator for forming a signal representative of a measured parameter, said display means displaying said signal representative of a measured parameter.
Claim 4
Dependent Claim
16 words
A measuring circuit device according to claim 1, wherein said measuring circuit device is a thermometer.
Claim 5
Dependent Claim
39 words
A measuring circuit device according to claim 1 further comprising voltage testing means for checking if a voltage source is normal, said voltage testing means causing said display means to indicate whether said voltage source is normal or not.
Claim 6
Dependent Claim
49 words
A measuring circuit device according to claim 1, wherein said measuring circuit means includes a sensor for sensing a parameter associated with an object to be measured by the device and a diode so coupled to the sensor that said diode discharges electrostatic potential externally charged on the sensor.
Claim 7
Dependent Claim
130 words
A measuring circuit device, comprising: a sensor for sensing a parameter to be measured; a reference component; measuring circuit means comprising a variable frequency oscillator having an input to which one of said sensor and reference component can be connected to determine the oscillating frequency, means for switchable connecting one of said sensor and said reference component to said oscillator input; comparing means for comparing a frequency produced by said oscillator when said sensor is connected thereto, with a frequency produced when said reference component is connected thereto, means responsive to an output of said comparator for producing a count value representative of a measured parameter, means including a storage means for producing a displayable parameter value from said count value; and display means for displaying said displayable parameter value.
Claim 8
Dependent Claim
130 words
A measuring circuit device, comprising: a sensor for sensing a parameter to be measured; a reference component; measuring circuit means comprising a variable frequency oscillator having an input to which one of said sensor and reference component can be connected to determine the oscillating frequency, means for switchable connecting one of said sensor and said reference component to said oscillator input; comparing means for comparing a frequency produced by said oscillator when said sensor is connected thereto, with a frequency produced when said reference component is connected thereto, means responsive to an output of said comparator for producing a count value representative of a measured parameter, means including a storage means for producing a displayable parameter value from said count value; and display means for displaying said displayable parameter value.
References Cited (Backward Citations)
US3665169A
Cited
US3866171A
Cited
US4328490A
Cited
US4443117A
Cited
US4402055A
Cited
US4464067A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-05-26 | 1989-11-25 | 1990-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-26 | 1993-11-25 | 1994-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-26 | 1997-11-25 | 1998-05-27 | $7700.00 | Window Closed / Lapsed |