US3742354A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for changing measuring items and measuring ranges
Assignee: Yokogawa Electric Corp
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Filing: 1971-08-18
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Granted: 1973-06-26
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Expires: 1991-08-18
Abstract
Abstract In a method of measuring various input signals over a wide range by combining one of a plurality of measuring items and one of a plurality of measuring ranges, the measuring item and measuring range are changed by manually selecting a measuring item, simultaneously shifting the position of the decimal point to the position of the minimum sensitivity of the selected measuring item, and then successively shifting the position of the decimal point until a desired range is reached.
Inventors
- 👤 T Sugiyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:26
CPC Classifications
G; G01; G01R; G01R15/00; G01R15/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
161 words
For use in combination with an automatic range selecting circuit comprising a level detector which is constructed to compare an input signal with predetermined upper and lower limits to provide an output signal dependent upon whether the input signal is higher than said upper limit or lower than said lower limit, a reversible counter responsive to the output of said level detector to provide a signal representing a position of a decimal point, and means responsive to the count of said reversible counter and a signal representing a selected measuring item for selecting a measuring range, apparatus for varying the measuring range comprising a manual setter including a first switch for shifting upwardly the position of the decimal point and a second switch for shifting downwardly the position of the decimal point, and transfer switch means for transferring the connection to the input of said reversible counter between the output from said level detector and the output from said manual setter.
Claim 2
Dependent Claim
161 words
For use in combination with an automatic range selecting circuit comprising a level detector which is constructed to compare an input signal with predetermined upper and lower limits to provide an output signal dependent upon whether the input signal is higher than said upper limit or lower than said lower limit, a reversible counter responsive to the output of said level detector to provide a signal representing a position of a decimal point, and means responsive to the count of said reversible counter and a signal representing a selected measuring item for selecting a measuring range, apparatus for varying the measuring range comprising a manual setter including a first switch for shifting upwardly the position of the decimal point and a second switch for shifting downwardly the position of the decimal point, and transfer switch means for transferring the connection to the input of said reversible counter between the output from said level detector and the output from said manual setter.
Claim 3
Dependent Claim
51 words
The apparatus according to claim 1 wherein a range setting potentiometer is connected between an input terminal for said input signal and said level detector and said range setting potentiometer is adjusted by said means responsive to the counts of said reversible counter and a signal representing a selected measuring item.
Claim 4
Dependent Claim
87 words
The apparatus according to claim 1 which further comprises an input terminal for receiving a clock pulse, a first AND gate circuit connected to the addition input terminal of said reversible counter and a second AND gate circuit connected to the subtraction input terminal of said reversible counter, and wherein said transfer switching means is adapted to connect to said first and second AND gate circuits either said clock pulse input terminal together with the output from said level detector or the output from said manual setter.
Claim 5
Dependent Claim
104 words
The apparatus according to claim 1 which further includes a logic circuit and a code converter which are connected in series between the output of said reversible counter and said means responsive to the count of said reversible counter and a signal representing a selected measuring item, said logic circuit, when operable transferring its input from said count of said reversible counter to an external code signal representing the set values regarding the selected measuring item and measuring range and said code converter acting to convert the output from said logic circuit into a decimal code representing a given position of the decimal point.
Claim 6
Dependent Claim
133 words
The apparatus according to claim 3 wherein said manual setter further includes a flip-flop circuit with its set and reset input terminals connected to said first and second switches respectively and its set and reset output terminals connected to the subtraction and addition input terminals of said reversible counter through said transfer switching means and said second and first AND gate circuits respectively, a monostable multivibrator, an OR gate circuit and a smoothing circuit, the output of said monostable multivibrator being connected to the inputs of said first and second gate circuits through said transfer switching means, said OR gate circuit receiving its inputs fRom both said first and second switches and said smoothing circuit being connected between said the output of said OR gate circuit and the input of said monostable multivibrator.
Claim 7
Dependent Claim
25 words
The apparatus according to claim 1 wherein said reversible counter starts from an initial reset count each time a new item is to be measured.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |