US3673325A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cathode ray tube display system for ultrasonic and radar echo signals
Assignee: Hoffrel Instruments Inc
•
Filing: 1970-04-10
•
Granted: 1972-06-27
•
Expires: 1990-04-10
Abstract
Abstract A system for displaying signals, particularly ultrasonic or radar echo signals, on a cathode ray tube, wherein a raster is constructed utilizing vertical and horizontal sweeps of suitable duration, intensity modulation of the electron beam is by application of the echo signals to the grid or cathode and modulation of the amplifier gain by one of the sweep waveforms or a waveform synchronous therewith to display the echo amplitudes on the raster.
Inventors
- 👤 Russel L Uphoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:22
CPC Classifications
A; A61; A61B; A61B8/00; A61B8/08; A61B8/0808; G; G01; G01S; G01S7/00; G01S7/02; G01S7/04; G01S7/06; G01S7/22; Y; Y10; Y10S; Y10S367/00; Y10S367/90
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
118 words
A method for displaying echo signals on a cathode ray tube, comprising the steps of: a. constructing a raster on the cathode ray tube by feeding vertical and horizontal sweep waveforms of suitable duration to the deflection coils of the cathode ray tube; b. intensity modulating the cathode ray tube electron beam by the signals to be displayed; and c. modulating the gain of the signal amplifier by at least one sweep waveform or a waveform synchronous with a sweep waveform and feeding the modulated signals to the cathode ray tube such that as the vertical sweep moves upward on the screen the gain is reduced whereby the signal amplitudes are displayed with the raster on the screen.
Claim 2
Independent Claim
118 words
A method for displaying echo signals on a cathode ray tube, comprising the steps of: a. constructing a raster on the cathode ray tube by feeding vertical and horizontal sweep waveforms of suitable duration to the deflection coils of the cathode ray tube; b. intensity modulating the cathode ray tube electron beam by the signals to be displayed; and c. modulating the gain of the signal amplifier by at least one sweep waveform or a waveform synchronous with a sweep waveform and feeding the modulated signals to the cathode ray tube such that as the vertical sweep moves upward on the screen the gain is reduced whereby the signal amplitudes are displayed with the raster on the screen.
Claim 3
Dependent Claim
44 words
A method for displaying signals on a cathode ray tube in accordance with claim 1, wherein: the vertical sweep frequency applied to the vertical deflection coil is selected to be an integer fraction of the horizontal sweep frequency applied to the horizontal deflection coil.
Claim 4
Dependent Claim
36 words
A method for displaying signals on a cathode ray tube in accordance with claim 1, wherein: the cathode ray tube electron beam is intensity modulated by application to the grid of the signals to be displayed.
Claim 5
Dependent Claim
36 words
A method for displaying signals on a cathode ray tube in accordance with claim 1, wherein: the cathode ray tube electron beam is intensity modulated by application to the cathode of the signals to be displayed.
Claim 6
Dependent Claim
43 words
A method for displaying signals on a cathode raY tube in accordance with claim 1, wherein: the amplifier gain is modulated by a sweep waveform fed to the receiver at a frequency which is an integer fraction of one of the sweep frequencies.
Claim 7
Independent Claim
116 words
A method for displaying echo signals on a cathode ray tube, comprising the steps of: a. constructing a raster on the cathode ray tube by feeding vertical and horizontal sweep waveforms of suitable duration to the deflection coils of the cathode ray tube; b. intensity modulating the cathode ray tube electron beam by the signals to be displayed; and c. modulating the gain of the signal amplifier by at least one sweep waveform or a waveform synchronous with a sweep waveform and feeding the sweep modulated signals to the cathode ray tube so as to intensity modulate the cathode ray tube during the period of display of said raster and display the amplitude of the signals.
Claim 8
Independent Claim
116 words
A method for displaying echo signals on a cathode ray tube, comprising the steps of: a. constructing a raster on the cathode ray tube by feeding vertical and horizontal sweep waveforms of suitable duration to the deflection coils of the cathode ray tube; b. intensity modulating the cathode ray tube electron beam by the signals to be displayed; and c. modulating the gain of the signal amplifier by at least one sweep waveform or a waveform synchronous with a sweep waveform and feeding the sweep modulated signals to the cathode ray tube so as to intensity modulate the cathode ray tube during the period of display of said raster and display the amplitude of the signals.
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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |