Patent US3887797A successfully refreshed from Google Patents.
US3887797A
Expired / Lapsed
US
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Device for automatically adjusting fault null point indication of digital scale
Assignee: Shinko Denshi Co Ltd
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Filing: 1973-09-26
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Granted: 1975-06-03
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Expires: 1993-09-26
Abstract
Abstract Device directing to an automatical adjustment of fault null point indication of a digital scale, which involves digital voltmeter for receiving an electric analogue signal proportional to the weighed value of an object. Said device essentially comprises a calculator accompanying with an integrator in conjunction with said digital voltmeter. The calculator serves for distinguishing whether the indicated value on the digital voltmeter, in dependence on polarity and magnitude thereof, is to be eliminated as a fault numeral indication in comparison with the preset slight numeral range or not; and for feeding back the adjusting signal to a mechanical or sole electric means through the integrator to induce shifting of the fault indication to the correct null point indication.
Inventors
- 👤 Yuzuru Nishiguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:56
CPC Classifications
G; G01; G01G; G01G23/00; G01G23/18; G01G23/36; G01G23/37; G01G23/14; G01G23/16; G01G23/163; G01G7/00; G01G7/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
224 words
In a digital scale system of the type having a digital voltmeter to which an input voltage proportional to a measured weight of an object is provided from an electric transducer consisting of a weighing system, and a device for automatically adjusting a faulty numeral indication at the null point to the exact 0, said device comprising: a calculator operatively coupled to and receiving two kinds of electric signals from said digital voltmeter, one being a signal for distinguishing whether the polarity of the indication on the digital voltmeter is (+) or (-), and the other being for distinguishing whether said indication is within or without the preset slight numeral range, a positive (+) output signal being produced by said calculator where the indication of (+) polarity falls within the preset numeral range, a negative output signal being produced by said calculator when the indication of (-) polarity falls within the preset slight range, and an output of 0 being produced independent of said distinguished polarity when the indication falls without the preset slight range; and an integrator coupled to said calculator for receiving the output signal thereof and coupled to said transducer for feeding back its output to one of a mechanical and electric means in said electric transducer until the indication of said digital voltmeter becomes correct 0 at the null point.
Claim 2
Dependent Claim
224 words
In a digital scale system of the type having a digital voltmeter to which an input voltage proportional to a measured weight of an object is provided from an electric transducer consisting of a weighing system, and a device for automatically adjusting a faulty numeral indication at the null point to the exact 0, said device comprising: a calculator operatively coupled to and receiving two kinds of electric signals from said digital voltmeter, one being a signal for distinguishing whether the polarity of the indication on the digital voltmeter is (+) or (-), and the other being for distinguishing whether said indication is within or without the preset slight numeral range, a positive (+) output signal being produced by said calculator where the indication of (+) polarity falls within the preset numeral range, a negative output signal being produced by said calculator when the indication of (-) polarity falls within the preset slight range, and an output of 0 being produced independent of said distinguished polarity when the indication falls without the preset slight range; and an integrator coupled to said calculator for receiving the output signal thereof and coupled to said transducer for feeding back its output to one of a mechanical and electric means in said electric transducer until the indication of said digital voltmeter becomes correct 0 at the null point.
Claim 3
Dependent Claim
224 words
In a digital scale system of the type having a digital voltmeter to which an input voltage proportional to a measured weight of an object is provided from an electric transducer consisting of a weighing system, and a device for automatically adjusting a faulty numeral indication at the null point to the exact 0, said device comprising: a calculator operatively coupled to and receiving two kinds of electric signals from said digital voltmeter, one being a signal for distinguishing whether the polarity of the indication on the digital voltmeter is (+) or (-), and the other being for distinguishing whether said indication is within or without the preset slight numeral range, a positive (+) output signal being produced by said calculator where the indication of (+) polarity falls within the preset numeral range, a negative output signal being produced by said calculator when the indication of (-) polarity falls within the preset slight range, and an output of 0 being produced independent of said distinguished polarity when the indication falls without the preset slight range; and an integrator coupled to said calculator for receiving the output signal thereof and coupled to said transducer for feeding back its output to one of a mechanical and electric means in said electric transducer until the indication of said digital voltmeter becomes correct 0 at the null point.
Claim 4
Dependent Claim
224 words
In a digital scale system of the type having a digital voltmeter to which an input voltage proportional to a measured weight of an object is provided from an electric transducer consisting of a weighing system, and a device for automatically adjusting a faulty numeral indication at the null point to the exact 0, said device comprising: a calculator operatively coupled to and receiving two kinds of electric signals from said digital voltmeter, one being a signal for distinguishing whether the polarity of the indication on the digital voltmeter is (+) or (-), and the other being for distinguishing whether said indication is within or without the preset slight numeral range, a positive (+) output signal being produced by said calculator where the indication of (+) polarity falls within the preset numeral range, a negative output signal being produced by said calculator when the indication of (-) polarity falls within the preset slight range, and an output of 0 being produced independent of said distinguished polarity when the indication falls without the preset slight range; and an integrator coupled to said calculator for receiving the output signal thereof and coupled to said transducer for feeding back its output to one of a mechanical and electric means in said electric transducer until the indication of said digital voltmeter becomes correct 0 at the null point.
Claim 5
Dependent Claim
43 words
The device for automatically adjusting a faulty numeral indication at the null point of the digital scale as mentioned in claim 1, wherein the integrator is a servomotor for feeding back its mechanical motion to a zero adjusting spring in the weigh system.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |