US3691284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Target simulator for an optical sight
Assignee: Saab Bofors AB
•
Filing: 1971-02-26
•
Granted: 1972-09-12
•
Expires: 1991-02-26
Abstract
Abstract The invention relates to a target simulator for optical aiming sights for simulating a moving target for the training of personnel in the use of the sight. The simulator device produces electronically a luminous dot, circle or ellipse, which appears within the field of view of the aiming sight and moves therein against the terrain or sky background in exactly the same manner as a real target and which can be tracked by operation of the aiming sight in exactly the same manner as when tracking a real target. A training instructor can continuously supervise the performances of the pupil when catching and tracking the simulated target and furthermore the tracking error can be automatically recorded for later analysis. The simulated target symbol can be moved within the field of view of the sight so as to duplicate practically any arbitrarilly selected movements of a real target.
Inventors
- 👤 Jan Lennart Borjeson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:36
CPC Classifications
F; F41; F41G; F41G3/00; F41G3/26; F41G3/2616; F41G3/2694; F41G7/00; F41G7/001; F41G7/002; F41G7/004
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
248 words
A target simulator for an optical aiming sight for simulating a moving target for training purposes, comprising a cathode ray tube (10) with a display screen (13), means (14) for generating a luminous, target simulating symbol on said display screen and deflection means (10x, 10y) for moving said target symbol relative to a center on said display screen as a function of signals suppliEd to said deflection means; target course generating means (19) for generating a signal varying in a predetermined manner, which is applied to said deflection means, whereby said target symbol is moved over the display screen of said cathode ray tube in a predetermined manner corresponding to the predetermined movements of the target to be simulated; means (12) for reflecting an image of said display screen of said cathode ray tube into the field of view of said aiming sight with said center point of said display screen coinciding with the line of sight (9) of said aiming sight; and means (21, 22) responsive to the movements of said line of sight relative to a coordinate system fixed in space for generating a signal representing said movements, said signal being supplied to said deflection means of said cathode ray tube as an additional control signal therefore in such a manner that any movement of said line of sight relative to space causes a corresponding but exactly oppositely directed movement of said target symbol on said display screen relative to the center of the display screen.
Claim 2
Dependent Claim
248 words
A target simulator for an optical aiming sight for simulating a moving target for training purposes, comprising a cathode ray tube (10) with a display screen (13), means (14) for generating a luminous, target simulating symbol on said display screen and deflection means (10x, 10y) for moving said target symbol relative to a center on said display screen as a function of signals suppliEd to said deflection means; target course generating means (19) for generating a signal varying in a predetermined manner, which is applied to said deflection means, whereby said target symbol is moved over the display screen of said cathode ray tube in a predetermined manner corresponding to the predetermined movements of the target to be simulated; means (12) for reflecting an image of said display screen of said cathode ray tube into the field of view of said aiming sight with said center point of said display screen coinciding with the line of sight (9) of said aiming sight; and means (21, 22) responsive to the movements of said line of sight relative to a coordinate system fixed in space for generating a signal representing said movements, said signal being supplied to said deflection means of said cathode ray tube as an additional control signal therefore in such a manner that any movement of said line of sight relative to space causes a corresponding but exactly oppositely directed movement of said target symbol on said display screen relative to the center of the display screen.
Claim 3
Dependent Claim
140 words
A target simulator as claimed in claim 1, further comprising a second cathode ray tube (23) with a display screen (24), means (27) for generating a luminous symbol on said display screen and deflection means (23x, 23y) fOr moving said symbol relative to a center on said display screen as a function of signals supplied to said deflection means, said deflection means of said second cathode ray tube being supplied with the same signals as said deflection means (10x, 10y) of said first cathode ray tube (10), whereby the symbol on the display screen of said second cathode ray tube is moved in accordance with the movements of the target symbol on the display screen of said first cathode ray tube, said second cathode ray tube being located so that its display screen can be viewed by a training instructor.
Claim 4
Dependent Claim
40 words
A target simulator as claimed in claim 1 further comprising signal recording means (28) for recording the amplitude of the total signal supplied to said deflection means (10x, 10y) of said cathode ray tube (10) as a function of time.
Claim 5
Dependent Claim
59 words
A target simulator as claimed in claim 1, wherein said symbol generating means (14) for said cathode ray tube (10) is controlled by said target course generating means (19) so as to vary the size of said target symbol in accordance with the instantaneous range to a target moving in the target course determined by said target course generator.
Claim 6
Dependent Claim
232 words
A target simulator as claimed in claim 1, wherein said deflection means of said cathode ray tube (10) include X-deflection means (10x) for moving said target symbol in the X-direction on the display screen (13) of the tube and Y-deflection means (10y) for deflecting said target symbol in the Y-direction on the display screen, the image of said display screen being reflected into the field of view of the aiming sight in such a manner that the X-direction on the display screen coincides with the horizontal direction in said field of view and the Y-direction on the display screen coincides with the vertical direction in said field of view, sad target course generating means (19) generating a first signal component representing the movements of the simulated target in azimuth, said first signal component being supplied to said X-deflection means (10x) of said cathode ray tube, and a second signal component representing the movements of the simulated target in elevation in said predetermined target course, said second signal component being supplied to said Y-deflection means (10y) of said cathode ray tube, and said means (21, 22) responsive to the movements of said line of sight (9) generating two signals proportional to the movements of said line of sight in azimuth and elevation respectively and said two signals being supplied to said X-deflection means and said Y-deflection means respectively of said cathode ray tube.
Claim 7
Dependent Claim
75 words
A target Simulator as claimed in claim 5, wherein said means responsive to the movements of said line of sight (36) include two angular velocity responsive gyros (Gs, Gh) mounted in said aiming sight so as to be responsive to the angular velocity in azimuth and the angular velocity in elevation respectively of said line of sight and to produce signals proportional to said angular velocities and signal integrating means (59) for integrating said signals.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |