Patent US4545445A successfully refreshed from Google Patents.
US4545445A
Expired / Lapsed
US
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Span adjusting system of electronic weighing apparatus
Assignee: Ishida Co Ltd
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Filing: 1984-07-06
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Granted: 1985-10-08
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Expires: 2004-07-06
Abstract
Abstract There is provided a system for adjusting the span of an electronic scale having a double-integrating A/D converter for converting a weight signal into a digital signal. The double-integrating A/D converter has a software-implemented timer for controlling a primary integrating time. The operation time of the software-implemented timer is adjusted linearly or in steps so that a digital value at the time a weight is placed on the scalepan of the scale will correspond to the weight. The adjustment of the operation time of the software-implemented timer is utilized to adjust the differences between gravitational accelerations corresponding to different weights in geographical areas on the earth.
Inventors
- 👤 Kazufumi Naito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:31
CPC Classifications
G; G01; G01G; G01G23/00; G01G23/01; G01G23/015; G01G23/012; G01G23/18; G01G23/36; G01G23/37; G01G23/3707
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
70 words
A system, for adjusting the span of an electronic scale, having a double-integrating A/D converter for converting a weight signal into a digital signal, said system comprising: a control unit, operatively connected to the double-integrating A/D converter, having a software-implemented timer for controlling a primary integrating time of the double-integrating A/D converter; and adjusting means, operatively connected to said control unit, for adjusting an operation time of said software-implemented timer.
Claim 2
Independent Claim
70 words
A system, for adjusting the span of an electronic scale, having a double-integrating A/D converter for converting a weight signal into a digital signal, said system comprising: a control unit, operatively connected to the double-integrating A/D converter, having a software-implemented timer for controlling a primary integrating time of the double-integrating A/D converter; and adjusting means, operatively connected to said control unit, for adjusting an operation time of said software-implemented timer.
Claim 3
Dependent Claim
25 words
A system according to claim 1, wherein said adjusting means comprises input means for entering said operation time as an input to said control unit.
Claim 4
Independent Claim
90 words
A system, for adjusting the span of an electronic scale, having a double-integrated A/D converter for converting a weight signal into a digital signal, said system comprising: display means, operatively connected to the double-integrating A/D converter, for displaying a digital signal produced by the double-integrating A/D converter; a control unit, operatively connected to the double-integrating A/D converter, having a software-implemented timer for controlling a primary integrating time of the double-integrating A/D converter; and adjusting means, operatively connected to said control unit, for adjusting an operation time of said software-implemented timer.
Claim 5
Independent Claim
90 words
A system, for adjusting the span of an electronic scale, having a double-integrated A/D converter for converting a weight signal into a digital signal, said system comprising: display means, operatively connected to the double-integrating A/D converter, for displaying a digital signal produced by the double-integrating A/D converter; a control unit, operatively connected to the double-integrating A/D converter, having a software-implemented timer for controlling a primary integrating time of the double-integrating A/D converter; and adjusting means, operatively connected to said control unit, for adjusting an operation time of said software-implemented timer.
Claim 6
Independent Claim
104 words
A system, for adjusting the span of an electronic scale, having a double-integrating A/D converter for converting a weight signal into a digital signal, said system comprising: a control unit, operatively connectable to the double-integrating A/D converter, having a software-implemented timer for controlling an integrating time for integrating the weight signal; setting means, operatively connected to said control unit, for applying a signal to said software implemented timer to stepwise change an operation time from said software-implemented timer of said control unit; and a variable resistor, operatively connected to the double-integrating A/D converter, for continuously adjusting a reference voltage of the double-integrating A/D converter.
Claim 7
Independent Claim
104 words
A system, for adjusting the span of an electronic scale, having a double-integrating A/D converter for converting a weight signal into a digital signal, said system comprising: a control unit, operatively connectable to the double-integrating A/D converter, having a software-implemented timer for controlling an integrating time for integrating the weight signal; setting means, operatively connected to said control unit, for applying a signal to said software implemented timer to stepwise change an operation time from said software-implemented timer of said control unit; and a variable resistor, operatively connected to the double-integrating A/D converter, for continuously adjusting a reference voltage of the double-integrating A/D converter.
Claim 8
Independent Claim
109 words
A system, for adjusting the span of an electronic scale, having a double-integrating A/D converter for converting a weight signal into a digital signal, said system comprising: a control unit, operatively connectable to the double-integrating A/D converter, having a software-implemented timer for controlling an integrating time for integrating the weight signal; setting means, operatively connected to said control unit, for applying a signal to said software implemented timer to stepwise change an operation time from said software-implemented timer of said control unit; and a variable resistor, operatively connected to the double-integrating A/D converter, for continuously adjusting an input voltage applied as the weight signal to the double-integrating A/D converter.
Claim 9
Independent Claim
109 words
A system, for adjusting the span of an electronic scale, having a double-integrating A/D converter for converting a weight signal into a digital signal, said system comprising: a control unit, operatively connectable to the double-integrating A/D converter, having a software-implemented timer for controlling an integrating time for integrating the weight signal; setting means, operatively connected to said control unit, for applying a signal to said software implemented timer to stepwise change an operation time from said software-implemented timer of said control unit; and a variable resistor, operatively connected to the double-integrating A/D converter, for continuously adjusting an input voltage applied as the weight signal to the double-integrating A/D converter.
Claim 10
Independent Claim
157 words
A system, for adjusting the span of an electronic scale, having a double-integrating A/D converter for converting a weight signal into a digital signal, said system comprising: a memory for storing a digital value indicative of the weight of a weight; a control unit including: a software-implemented timer, operatively connected to the double-integrating A/D converter, for controlling a primary integrating time of the double-integrating A/D converter; and adjusting means, operatively connected to said memory, the double-integrating A/D converter and said software implemented timer, for reading the digital value from said memory, comparing the read digital value with an output value from the double-integrating A/D converter at the time a weight is placed on a scalepan of the electronic scale, and adjusting an operation time of said software-implemented timer so that the compared values will be equal to each other; and a span command switch, operatively connected to said adjusting means, for commanding operation of said adjusting means.
Claim 11
Independent Claim
157 words
A system, for adjusting the span of an electronic scale, having a double-integrating A/D converter for converting a weight signal into a digital signal, said system comprising: a memory for storing a digital value indicative of the weight of a weight; a control unit including: a software-implemented timer, operatively connected to the double-integrating A/D converter, for controlling a primary integrating time of the double-integrating A/D converter; and adjusting means, operatively connected to said memory, the double-integrating A/D converter and said software implemented timer, for reading the digital value from said memory, comparing the read digital value with an output value from the double-integrating A/D converter at the time a weight is placed on a scalepan of the electronic scale, and adjusting an operation time of said software-implemented timer so that the compared values will be equal to each other; and a span command switch, operatively connected to said adjusting means, for commanding operation of said adjusting means.
Claim 12
Independent Claim
133 words
A system, for adjusting the span of an electronic scale, having a double-integrating A/D converter for converting a weight signal into a digital signal, said system comprising: a sofware-implemented timer, operatively connectable to the double-integrating A/D converter, for controlling an integrating time for integrating an input signal; a control unit, operatively connectable to the double-integrating A/D converter and to said software implemented timer, having control means for controlling an operation time of said software-implemented timer; a memory, operatively connected to said software implemented timer, for storing operation times of said software-implemented timer corresponding to respective gravitational accelerations so that the span of the electronic scale remains constant; and area indicating means, operatively connected to said memory, for indicating areas corresponding to the operation times stored in said memory for the respective gravitational accelerations.
Claim 13
Independent Claim
133 words
A system, for adjusting the span of an electronic scale, having a double-integrating A/D converter for converting a weight signal into a digital signal, said system comprising: a sofware-implemented timer, operatively connectable to the double-integrating A/D converter, for controlling an integrating time for integrating an input signal; a control unit, operatively connectable to the double-integrating A/D converter and to said software implemented timer, having control means for controlling an operation time of said software-implemented timer; a memory, operatively connected to said software implemented timer, for storing operation times of said software-implemented timer corresponding to respective gravitational accelerations so that the span of the electronic scale remains constant; and area indicating means, operatively connected to said memory, for indicating areas corresponding to the operation times stored in said memory for the respective gravitational accelerations.
Claim 14
Dependent Claim
40 words
A system according to claim 7, wherein the operation times stored in said memory are deviations of the operation times of said software-implemented timer for the respective areas from the operation time of said software-implemented timer for a particular area.
Claim 15
Dependent Claim
63 words
A system according to claim 7, wherein a deviation time for an indicated area is added to or subtracted from the operation time of said software-implemented timer for a particular area, and the operation time of the software-implemented timer for an indicated area is controlled by the time to which the deviation time is added or from which the deviation time is subtracted.
Claim 16
Independent Claim
78 words
A system for adjusting the span of an electronic scale, operatively connected to receive a weight signal, said system comprising: a double-integrating A/D converter for integrating the weight signal; a control unit, operatively connected to said double-integrating A/D converter, having a software implemented timer for controlling an integrating time for integrating the weight signal; and setting means, operatively connected to said control unit, for applying a signal to stepwise change an operation time of said software implemented timer.
Claim 17
Independent Claim
78 words
A system for adjusting the span of an electronic scale, operatively connected to receive a weight signal, said system comprising: a double-integrating A/D converter for integrating the weight signal; a control unit, operatively connected to said double-integrating A/D converter, having a software implemented timer for controlling an integrating time for integrating the weight signal; and setting means, operatively connected to said control unit, for applying a signal to stepwise change an operation time of said software implemented timer.
Claim 18
Dependent Claim
96 words
A span adjusting system, operatively connected to receive a weight signal and a reference voltage, comprising: a double-integrating A/D converter operatively connectable to receive the reference voltage; a control unit, operatively connected to said double-integrating A/D converter, having a software-implemented timer for controlling an integrating time for integrating the weight signal; setting means, operatively connected to said control unit, for applying a signal to stepwise change an operation time of said software implemented timer; and a variable resistor, operatively connected to said double-integrating A/D converter, for continuously adjusting the reference voltage of said double-integrating A/D converter.
Claim 19
Dependent Claim
96 words
A span adjusting system, operatively connected to receive a weight signal and a reference voltage, comprising: a double-integrating A/D converter operatively connectable to receive the reference voltage; a control unit, operatively connected to said double-integrating A/D converter, having a software-implemented timer for controlling an integrating time for integrating the weight signal; setting means, operatively connected to said control unit, for applying a signal to stepwise change an operation time of said software implemented timer; and a variable resistor, operatively connected to said double-integrating A/D converter, for continuously adjusting the reference voltage of said double-integrating A/D converter.
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) | 1988-10-07 | 1989-04-08 | 1989-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-07 | 1993-04-08 | 1993-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-07 | 1997-04-08 | 1997-10-08 | $7700.00 | Window Closed / Lapsed |