US4000454A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Linearization apparatus for a non-linear resistance transducer in a self-balancing bridge connection
Assignee: INSTRUMENTFIRMAN INOR AB
•
Filing: 1975-04-29
•
Granted: 1976-12-28
•
Expires: 1995-04-29
Abstract
Abstract A linearization apparatus for a non-linear resistance transducer in a self-balancing bridge connection, in which apparatus the non-linear characteristic of the resistance transducer is linearized by changing the voltage impressed on the bridge as the resistance of the transducer changes.
Inventors
- 👤 George Felix Brakl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:13
CPC Classifications
G; G01; G01K; G01K7/00; G01K7/16; G01K7/18; G01K7/20; G01K7/21; G01D; G01D3/00; G01D3/02; G01D3/021
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
109 words
In a linearization apparatus for a first measured value producing impedance means connected in series with a second impedance means over a voltage source having a plurality of poles and having a feedback means for compensating for a change in potential relative to a reference potential, said change in potential caused by the junction of said first impedance means with said second impedance means, the improvement comprising: voltage varying means between said voltage source and said first and second impedance means for varying the voltage impressed on said first and second impedance means from said voltage source in response to said change in potential relative to said reference potential.
Claim 2
Dependent Claim
109 words
In a linearization apparatus for a first measured value producing impedance means connected in series with a second impedance means over a voltage source having a plurality of poles and having a feedback means for compensating for a change in potential relative to a reference potential, said change in potential caused by the junction of said first impedance means with said second impedance means, the improvement comprising: voltage varying means between said voltage source and said first and second impedance means for varying the voltage impressed on said first and second impedance means from said voltage source in response to said change in potential relative to said reference potential.
Claim 3
Dependent Claim
49 words
An improvement as claimed in claim 1 wherein said voltage varying means is comprised of: a constant voltage sink fed from said voltage source in response to said change in potential; and a resistor connected in series with said constant voltage sink over said first and second impedance means.
Claim 4
Dependent Claim
40 words
An improvement as claimed in claim 2 wherein said voltage varying means is further comprised of: a voltage/current converter connected between one pole of said voltage source and said constant voltage sink, said converter responsive to said change in potential.
Claim 5
Dependent Claim
25 words
An improvement as claimed in claim 3, further comprising: a resistor connected between the second pole of said voltage source and said second impedance means.
Claim 6
Dependent Claim
42 words
An improvement as claimed in claim 3 further comprising: third and fourth impedance means connected in series between the connection of said voltage/current converter to said constant voltage sink and the second pole of said voltage source for generating a reference potential.
Claim 7
Dependent Claim
56 words
An improvement as claimed in claim 5, further comprising: an operational amplifier connected at one input thereof to the junction of said first and second impedance means and at another input thereinto to the junction of said third and fourth impedance means, and connected at the output thereof to the control input of said voltage/current converter.
Claim 8
Dependent Claim
25 words
An improvement as claimed in claim 5 further comprising: a resistor connected between the second pole of said voltage source and said second impedance means.
Claim 9
Dependent Claim
56 words
An improvement as claimed in claim 5 further comprising: an operationl amplifier connected at one input thereof to the junction of said first and second impedance means and at another input thereinto to the junction of said third and fourth impedance means, and connected at the output thereof to the control input of said voltage/current 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) | 1979-12-28 | 1980-06-28 | 1980-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-28 | 1984-06-28 | 1984-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-28 | 1988-06-28 | 1988-12-28 | $7700.00 | Window Closed / Lapsed |