US3798431A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic calibration of an electro-mechanical system
Assignee: Corning Glass Works
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Filing: 1972-10-04
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Granted: 1974-03-19
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Expires: 1992-10-04
Abstract
Abstract An automatic correction is provided for mechanical deviation in the display of the measured electronic input to a mechanical actuator. In a titration system, pulses are applied to a stepping motor which adds a precise volume of titrant to the mixture to be titrated. A measurement of the number of pulses is an indication of the volume added but this measurement must be corrected for variations in the strength of the titrant and/or for mechanical deviation in the delivery system. An automatic calibration system produces output pulses related in number by a specified calibrating ratio to the number of pulses applied to the stepping motor. This calibrating ratio is automatically set into the system during a calibrate mode using a standard titrant.
Inventors
- 👤 H Schulkind
- 👤 A Pettersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:09
CPC Classifications
G; G01; G01N; G01N31/00; G01N31/16; G01N31/162; G01N31/164
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
186 words
In an electromechanical system including an actuator which moves to produce precise increments of change in a physical quantity in response to applied pulses, a detector for indicating when a given change in said physical quantity has been reached, and an indicator of the movement of said actuator required to reach said given physical change, the improvement of an automatic calibration system comprising: a source of clock pulses, a gate, said clock pulses being applied to said gate, said gate being opened at the beginning of movement of said actuator and closed in response to an output from said detector, means for applying said gated pulses to said actuator to move said actuator in said precise increments, a pulse ratio circuit, said gated pulses being applied to said pulse ratio circuit, said pulse ratio circuit producing output pulses related in number by a specified calibrating ratio to the number of input pulses, and a digital display, the output pulses from said ratio circuit being applied to said digital display so that said display indicates the amount of movement of said actuator factored by said calibrating ratio.
Claim 2
Dependent Claim
186 words
In an electromechanical system including an actuator which moves to produce precise increments of change in a physical quantity in response to applied pulses, a detector for indicating when a given change in said physical quantity has been reached, and an indicator of the movement of said actuator required to reach said given physical change, the improvement of an automatic calibration system comprising: a source of clock pulses, a gate, said clock pulses being applied to said gate, said gate being opened at the beginning of movement of said actuator and closed in response to an output from said detector, means for applying said gated pulses to said actuator to move said actuator in said precise increments, a pulse ratio circuit, said gated pulses being applied to said pulse ratio circuit, said pulse ratio circuit producing output pulses related in number by a specified calibrating ratio to the number of input pulses, and a digital display, the output pulses from said ratio circuit being applied to said digital display so that said display indicates the amount of movement of said actuator factored by said calibrating ratio.
Claim 3
Dependent Claim
182 words
In a titration system including means for delivering precise volumes of titrant to the mixture to be titrated, an endpoint detector for indicating when a given effect in reaction has been reached in the titrated mixture, and an indicator of the volume of titrant required to reach said given effect, the improvement of an automatic calibration system comprising: a source of clock pulses, a gate, said clock pulses being applied to said gate, said gate being opened at the beginning of titration and closed in response to an output from said endpoint detector, means responsive to the gated pulses for delivering one of said precise volumes of titrant to said mixture, a pulse ratio circuit, said gated pulses being applied to said pulse ratio circuit, said pulse ratio circuIt producing output pulses related in number by a specified calibrating ratio to the number of input pulses, and a digital display, the output pulses from said ratio circuit being applied to said digital display so that said display indicates the precise volume of titrant added to said mixture factored by said calibrating ratio.
Claim 4
Dependent Claim
182 words
In a titration system including means for delivering precise volumes of titrant to the mixture to be titrated, an endpoint detector for indicating when a given effect in reaction has been reached in the titrated mixture, and an indicator of the volume of titrant required to reach said given effect, the improvement of an automatic calibration system comprising: a source of clock pulses, a gate, said clock pulses being applied to said gate, said gate being opened at the beginning of titration and closed in response to an output from said endpoint detector, means responsive to the gated pulses for delivering one of said precise volumes of titrant to said mixture, a pulse ratio circuit, said gated pulses being applied to said pulse ratio circuit, said pulse ratio circuIt producing output pulses related in number by a specified calibrating ratio to the number of input pulses, and a digital display, the output pulses from said ratio circuit being applied to said digital display so that said display indicates the precise volume of titrant added to said mixture factored by said calibrating ratio.
Claim 5
Dependent Claim
87 words
The system recited in claim 2 wherein said system is operated in a calibrate mode and an analysis mode, a standard calibrating mixture being provided as the mixture to be titrated during said calibration mode, said system further comprising: means for counting the actual number of aliquots required to titrate said standard calibrating mixture, and means for storing said actual number, the specified ratio in said pulse ratio circuit being the nominal number of aliquots required to titrate said standard calibrating mixture divided by said actual number.
Claim 6
Independent Claim
134 words
The system recited in claimed 3 wherein said pulse ratio circuit includes a first counter, said gated pulses being applied to said first counter, said first counter producing titrating pulses at a count related to said expected number of aliquots, said titrating pulses being applied to said means for delivering a precise volume of titrant to said mixture, said means for storing said actual number of aliquots including a second counter connected to count said titrating pulses, a third counter, said gated pulses being applied to said third counter, and a digital comparator, the outputs of said third counter and said means for storing said actual number being applied to said digital comparator, said digital comparator producing one of said output pulses each time the count in said third counter reaches said actual number.
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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |