Patent US3604003A successfully refreshed from Google Patents.
US3604003A
Expired / Lapsed
US
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Range computer
Assignee: Lockheed Martin Corp
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Filing: 1969-04-16
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Granted: 1971-09-07
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Expires: 1989-04-16
Abstract
Abstract A range computer for use in a dual source input ranging system where a signal representing the difference between the dual sources is fed to a differential amplifier together with a normalizing signal from one of the sources. A null-seeking servo fed by the differential amplifier parallel drives an input potentiometer controlling the input level of the normalizing signal to the differential amplifier and an output potentiometer controlling the volume of a DC reference voltage, the output of the potentiometer representing the range.
Inventors
- 👤 Michael Freier
- 👤 Leonard P Balazer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:15
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/48; G06G7/78; G01; G01S; G01S11/00; G01S11/02; G01S11/06
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
154 words
A range computer for a dual source input ranging system for determining range from a moving vehicle to a radiating target comprising: a. a difference signal source representing the distance between the dual sources; b. a normalizing signal source from one input of the dual source; c. a differential amplifier fed by the difference signal source and the normalizing signal source; d. an input potentiometer having a movable tap interposed between the normalizing signal source and the differential amplifier for adjustment of the input thereto; e. a null-seeking servo fed by the differential amplifier; f. an output potentiometer having a movable tap fed by the nullseeking servo and ganged controlled with the input potentiometer; g. a voltage reference source connected to the output potentiometer; and h. a signal source connected to the reference voltage source for the control thereof, the signal being proportional to the angle of the vehicle path relative to target direction.
Claim 2
Dependent Claim
154 words
A range computer for a dual source input ranging system for determining range from a moving vehicle to a radiating target comprising: a. a difference signal source representing the distance between the dual sources; b. a normalizing signal source from one input of the dual source; c. a differential amplifier fed by the difference signal source and the normalizing signal source; d. an input potentiometer having a movable tap interposed between the normalizing signal source and the differential amplifier for adjustment of the input thereto; e. a null-seeking servo fed by the differential amplifier; f. an output potentiometer having a movable tap fed by the nullseeking servo and ganged controlled with the input potentiometer; g. a voltage reference source connected to the output potentiometer; and h. a signal source connected to the reference voltage source for the control thereof, the signal being proportional to the angle of the vehicle path relative to target direction.
Claim 3
Dependent Claim
60 words
A range computer according to claim 1 which further comprises means for automatically calibrating the ranging system by adjusting one input of the dual source, the calibrating means comprising: a. a null servo fed by the difference signal; and b. a gate circuit fed by the output of the null servo, the gate being activated by a calibration enabling signal.
References Cited (Backward Citations)
US3134104A
Cited
US3430243A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |