Patent US4144542A successfully refreshed from Google Patents.
US4820161A
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Training aid
Assignee: Westland System Assessment Ltd
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Filing: 1987-08-27
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Granted: 1989-04-11
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Expires: 2007-08-27
Abstract
Abstract A method and apparatus for simulating artillery and other types of indirect field of fire gunnery as an aid to training gunnery observers comprises projecting onto a screen 11 a terrain photographic image. Computer generated artillery shell bursts are overlaid on the terrain photographic image at locations commanded by a trainee observer 19 by projection through a video projector 14 connected with a computer 15. Instructions are entered in the computer by an operator 17 who may be a training instructor.
Inventors
- 👤 Peter L. Wescott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:34
CPC Classifications
F; F41; F41A; F41A33/00; F41G; F41G3/00; F41G3/26; F41G3/2616; F41G3/2622; F41G3/2627
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
191 words
A method of simulating artillery fire for training an artillery observer comprising the steps of: a. projecting a computer generated line frame on a projection screen through a video projector, b. projecting on the projection screen a terrain photographic image so that the boundaries thereof are aligned with the boundaries of the line frame, c. entering ion a memory of the computer the grid co-ordinates and height above sea level of the location at which the photographic image was taken, d. entering in the computer memory the grid co-ordinates of at least two locations marked on the projected terrain photographic image by cross-hair cursor lines drawn by the computer and projected through the video projector, e. entering in the computer grid co-ordinates of a target location commanded by a trainee observer positioned to observe the projection screen, f. calculating in the computer from the information stored therein by steps c, d, and e the corresponding position of the target location on the projected terrain photographic image, g. overlaying on the projected terrain photographic image at said corresponding position a computer generated artillery shell burst image by projection through the video projector.
Claim 2
Independent Claim
191 words
A method of simulating artillery fire for training an artillery observer comprising the steps of: a. projecting a computer generated line frame on a projection screen through a video projector, b. projecting on the projection screen a terrain photographic image so that the boundaries thereof are aligned with the boundaries of the line frame, c. entering ion a memory of the computer the grid co-ordinates and height above sea level of the location at which the photographic image was taken, d. entering in the computer memory the grid co-ordinates of at least two locations marked on the projected terrain photographic image by cross-hair cursor lines drawn by the computer and projected through the video projector, e. entering in the computer grid co-ordinates of a target location commanded by a trainee observer positioned to observe the projection screen, f. calculating in the computer from the information stored therein by steps c, d, and e the corresponding position of the target location on the projected terrain photographic image, g. overlaying on the projected terrain photographic image at said corresponding position a computer generated artillery shell burst image by projection through the video projector.
Claim 3
Dependent Claim
27 words
A method according to claim 1 including the step of overlaying on the terrain photographic image a computer generated target image by projection through the video projector.
Claim 4
Dependent Claim
54 words
A method according to claim 1 including the step of projecting on the projection screen through the video projector computer generated graduation lines at spaced intervals across the projection screen for assisting a trainee observer observing the projection screen through graticuled binoculars to take up an accurate position in front of the projection screen.
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) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |