US5146172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Engine identification system
Assignee: Sundstrand Corp
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Filing: 1990-08-15
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Granted: 1992-09-08
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Expires: 2010-08-15
Abstract
Abstract An identification module and identification determination circuitry are provided for the purpose of identifying an apparatus and electrically determining the identification number of that identified apparatus. The identification module comprises a plurality of resistive identification circuits which, in turn, each comprise a plurality of resistive elements selected to have resistive magnitudes that relate to each other by powers, or orders, of two. The identification determination circuit of the present invention places each of the resistive identification circuits in series with a resistor of known magnitude between two connection points to provide a voltage potential and a resulting current flowing through the resistive identification circuit. The invention also provides a means by which the input voltage can be determined and used to adjust the determined magnitude of the resistive identification circuit.
Inventors
- 👤 Kourosh Mehr-Ayin
- 👤 William Conn
- 👤 Luis M. Rivera
- 👤 Andrew L. Gale
- 👤 Phillip A. Marsh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 02:53
CPC Classifications
G; G06; G06K; G06K19/00; G06K19/06; G06K19/067; G08; G08C; G08C19/00; G08C19/02; G08C19/025
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
183 words
An identification system, comprising: a first resistor of known magnitude; first means for connecting said first resistor of known magnitude electrically in series with a first resistive identification circuit between an input voltage and electrical ground; first means for measuring a first voltage magnitude at a point between said first resistor of known magnitude and said first resistive identification circuit; a second resistor of known magnitude and a third resistor of known magnitude, said second and third resistors being connected electrically in series between said input voltage and said electrical ground; second means for measuring a second voltage magnitude at a point between said second and third resistors; and first means for determining the resistance magnitude of said first resistive identification circuit as a function of said first voltage magnitude and second voltage magnitude; second means for connecting a fourth resistor of known magnitude electrically in series with a second resistive identification circuit between said input voltage and said electrical ground; and third means for measuring a third voltage magnitude between said fourth resistor of known magnitude and said second resistive identification circuit.
Claim 2
Dependent Claim
183 words
An identification system, comprising: a first resistor of known magnitude; first means for connecting said first resistor of known magnitude electrically in series with a first resistive identification circuit between an input voltage and electrical ground; first means for measuring a first voltage magnitude at a point between said first resistor of known magnitude and said first resistive identification circuit; a second resistor of known magnitude and a third resistor of known magnitude, said second and third resistors being connected electrically in series between said input voltage and said electrical ground; second means for measuring a second voltage magnitude at a point between said second and third resistors; and first means for determining the resistance magnitude of said first resistive identification circuit as a function of said first voltage magnitude and second voltage magnitude; second means for connecting a fourth resistor of known magnitude electrically in series with a second resistive identification circuit between said input voltage and said electrical ground; and third means for measuring a third voltage magnitude between said fourth resistor of known magnitude and said second resistive identification circuit.
Claim 3
Dependent Claim
32 words
The identification system of claim 1, further comprising: determining means for determining the resistance magnitude of said first resistive identification circuit as a function of said first voltage magnitude and second magnitude.
Claim 4
Dependent Claim
35 words
The identification system of claim 1, further comprising: said determining means for determining the resistance magnitude of said second resistive identification circuit as a function of said second voltage magnitude and said third voltage magnitude.
Claim 5
Dependent Claim
34 words
The identification system of claim 3, further comprising: an identification module comprising said first and second resistive identification circuits, said identification module being connected in electrical communication with said first and second connecting means.
Claim 6
Dependent Claim
54 words
The identification system of claim 1, further comprising: third means for connecting a fifth resistor of known magnitude electrically in series with a third resistive identification circuit between said input voltage and said electrical ground; and fourth means for measuring a fourth voltage magnitude between said fifth resistor and said third resistive identification circuit.
Claim 7
Dependent Claim
35 words
The identification system of claim 5, further comprising: said determining means for determining the resistance magnitude of said third resistive identification circuit as a function of said second voltage magnitude and said fourth voltage magnitude.
Claim 8
Dependent Claim
36 words
The identification system of claim 6, further comprising: an identification module comprising said first, second and third resistive identification circuits, said identification module being connected in electrical communication with said first, second and third connecting means.
Claim 9
Dependent Claim
30 words
The identification system of claim 1, further comprising: an identification module comprising said first resistive identification circuit, said identification module being connected in electrical communication with said first connecting means.
Claim 10
Dependent Claim
161 words
Apparatus for reading a resistively coded identification value, comprising: means for connecting a first resistive identification circuit electrically between a first connection point and a second connection point; means for disposing a first resistor of known magnitude electrically in series with said first resistive identification circuit between said first connection point and said second connection point; means for providing a voltage potential between said first and said second connection points; first means for measuring a first voltage at a point between said first resistor of known magnitude and said first resistive identification circuit; means for connecting a second resistive identification circuit electrically between said first and second connection points; means for disposing a second resistor of known magnitude electrically in series with said second resistive identification circuit between said first connection point and said second connection point; and third means for measuring a second voltage at a point between said second resistor of known magnitude and said second resistive identification circuit.
Claim 11
Dependent Claim
161 words
Apparatus for reading a resistively coded identification value, comprising: means for connecting a first resistive identification circuit electrically between a first connection point and a second connection point; means for disposing a first resistor of known magnitude electrically in series with said first resistive identification circuit between said first connection point and said second connection point; means for providing a voltage potential between said first and said second connection points; first means for measuring a first voltage at a point between said first resistor of known magnitude and said first resistive identification circuit; means for connecting a second resistive identification circuit electrically between said first and second connection points; means for disposing a second resistor of known magnitude electrically in series with said second resistive identification circuit between said first connection point and said second connection point; and third means for measuring a second voltage at a point between said second resistor of known magnitude and said second resistive identification circuit.
Claim 12
Dependent Claim
34 words
The apparatus of claim 9, further comprising: means, connected in signal communication with said first measuring means, for determining the resistance of said first resistive identification circuit as a function of said first voltage.
Claim 13
Dependent Claim
43 words
The apparatus of claim 9, further comprising: means for disposing a serially connected pair of resistors of known magnitude electrically between said first and second connection points; and second means for measuring a reference voltage at a point between said pair of resistors.
Claim 14
Dependent Claim
38 words
The apparatus of claim 11, further comprising: means connected in signal communication with said first and second measuring means, for determining the resistance of said first resistive identification circuit as a function of said first and reference voltages.
Claim 15
Dependent Claim
34 words
The apparatus of claim 12, further comprising: means, connected in signal communication with said second measuring means, for determining the resistance of said second resistive identification circuit as a function of said second voltage.
Claim 16
Dependent Claim
43 words
The apparatus of claim 13, further comprising: means for disposing a serially connected pair of resistors of known magnitude electrically between said first and second connection points; and second means for measuring a reference voltage at a point between said pair of resistors.
Claim 17
Dependent Claim
38 words
The apparatus of claim 14, further comprising: means, connected in signal communication with said second and third measuring means, for determining the resistance of said second resistive identification circuit as a function of said second and reference voltages.
Claim 18
Dependent Claim
36 words
The apparatus of claim 15, further comprising: means for determining an identification value represented by said first and second resistive identification circuits as a function of said resistances of said first and second resistive identification circuits.
Claim 19
Dependent Claim
42 words
The apparatus of claim 15, further comprising: means for multiplying said determined resistance of said first resistive identification circuit by a first predetermined value; and means for multiplying said determined resistance of said second resistive identification circuit by a second predetermined value.
Claim 20
Independent Claim
189 words
A method for reading a resistively coded identification value, comprising: connecting a first resistive identification circuit electrically between a first connection point and a second connection point; disposing a first resistor of known magnitude electrically in series with said first resistive identification circuit between said first connection point and said second connection point; providing a voltage potential between said first and said second connection points; determining the resistance of said first resistive identification circuit as a function of first voltage; disposing a serially connected pair of resistors of known magnitude electrically between said first and second connection points; measuring a reference voltage at a point between said pair of resistors; determining the resistance of said first resistive identification circuit as a function of first and said reference voltages; connecting a second resistive identification circuit electrically between said first and second connection points; disposing a second resistor of known magnitude electrically in series with said second resistive identification circuit between said first connection point and said second connection point; and measuring a second voltage at a point between said second resistor of known magnitude and said second resistive identification circuit.
Claim 21
Independent Claim
189 words
A method for reading a resistively coded identification value, comprising: connecting a first resistive identification circuit electrically between a first connection point and a second connection point; disposing a first resistor of known magnitude electrically in series with said first resistive identification circuit between said first connection point and said second connection point; providing a voltage potential between said first and said second connection points; determining the resistance of said first resistive identification circuit as a function of first voltage; disposing a serially connected pair of resistors of known magnitude electrically between said first and second connection points; measuring a reference voltage at a point between said pair of resistors; determining the resistance of said first resistive identification circuit as a function of first and said reference voltages; connecting a second resistive identification circuit electrically between said first and second connection points; disposing a second resistor of known magnitude electrically in series with said second resistive identification circuit between said first connection point and said second connection point; and measuring a second voltage at a point between said second resistor of known magnitude and said second resistive identification circuit.
Claim 22
Dependent Claim
23 words
The method of claim 18, further comprising: determining the resistance of said second resistive identification circuit as a function of said second voltage.
Claim 23
Dependent Claim
38 words
The method of claim 18, further comprising: disposing a serially connected pair of resistors of known magnitude electrically between said first and second connection points; and measuring a reference voltage at a point between said pair of resistors.
Claim 24
Dependent Claim
25 words
The method of claim 20 further comprising: determining the resistance of said second resistive identification circuit as a function of said second and reference voltages.
Claim 25
Dependent Claim
34 words
The method of claim 21, further comprising: determining an identification value, represented by said first and second resistive identification circuits, as a function of said resistors of said first and second resistive identification circuits.
Claim 26
Dependent Claim
38 words
The method of claim 21, further comprising: multiplying said determined resistance of said first resistive identification circuit by a first predetermined magnitude; and multiplying said determined resistance of said second resistive identification circuit by a second predetermined magnitude.
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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) | 1995-09-08 | 1996-03-09 | 1996-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-08 | 2000-03-09 | 2000-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-08 | 2004-03-09 | 2004-09-08 | $7700.00 | Window Closed / Lapsed |