US3964178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Universal infantry weapons trainer
Assignee: United States Department of the Navy
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Filing: 1975-07-03
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Granted: 1976-06-22
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Expires: 1995-07-03
Abstract
Abstract A universal weapon fire simulation system in which frames of motion picture film are employed to produce simultaneously from one set of frames a background area including a target and, from another set of frames, an infrared lead aim spot. The sets of film frames are coordinated in projection in a desired degree of non-registration between the lead spot and the target to provide a lead in the infrared spot representative of the correct lead and elevation of a properly aimed weapon. The invention also includes a receiver circuit comprising a quadrant arrangement of infrared detectors for sensing the infrared lead aim spot when the weapon is correctly aimed, and amplifier, comparator, logic and hit indicator means for indicating a miss, hit, or a specific area of near miss when the weapon is triggered to activate the sensor circuit.
Inventors
- 👤 Albert H. Marshall
- 👤 Frank J. Oharek
- 👤 John H. Dillard
- 👤 Robert J. Entwistle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:08
CPC Classifications
F; F41; F41G; F41G3/00; F41G3/26; F41G3/2616; F41G3/2622; F41G3/2627
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
255 words
A weapon fire simulation system comprising projection apparatus and film, said film being processed to provide from a first series of film frames a background scene including a target area and from a second series of film frames a lead aim spot; said projection apparatus having a source of visible light for passing through said first series of film frames and a source of infrared light for passing through said second series of film frames; drive means for coordinately driving said film frames in a desired degree of non-registration between said aim spot and said target area representative of the correct lead and elevation for a proper aiming of said weapon; a projector screen for viewing said film frames; a filter selected and positioned to filter all except infrared light from passing from said second film frames to said screen to provide an infrared aim spot on said screen and a filter selected and positioned to filter infrared light from passing from said first film frames to said screen; a plurality of infrared sensor circuits, each forming a sensor channel and each comprising an infrared sensor and amplifier and voltage comparator means; said sensor being arranged in a geometrical pattern to develop from each sensor when the weapon is aimed and fired, a channel output signal indicative of hit or miss; and a logic circuit for receiving the output signals of each sensor channel to produce from the combined sensor signals an ultimate output signal indicative of hit, miss, and specific area of near miss.
Claim 2
Dependent Claim
255 words
A weapon fire simulation system comprising projection apparatus and film, said film being processed to provide from a first series of film frames a background scene including a target area and from a second series of film frames a lead aim spot; said projection apparatus having a source of visible light for passing through said first series of film frames and a source of infrared light for passing through said second series of film frames; drive means for coordinately driving said film frames in a desired degree of non-registration between said aim spot and said target area representative of the correct lead and elevation for a proper aiming of said weapon; a projector screen for viewing said film frames; a filter selected and positioned to filter all except infrared light from passing from said second film frames to said screen to provide an infrared aim spot on said screen and a filter selected and positioned to filter infrared light from passing from said first film frames to said screen; a plurality of infrared sensor circuits, each forming a sensor channel and each comprising an infrared sensor and amplifier and voltage comparator means; said sensor being arranged in a geometrical pattern to develop from each sensor when the weapon is aimed and fired, a channel output signal indicative of hit or miss; and a logic circuit for receiving the output signals of each sensor channel to produce from the combined sensor signals an ultimate output signal indicative of hit, miss, and specific area of near miss.
Claim 3
Dependent Claim
45 words
Apparatus according to claim 1 including an audio system of pre-recorded messages actuable from said ultimate output signal to produce an audio call of the exact area hit while the trainee still has his point of aim and can see what he has done incorrectly.
Claim 4
Dependent Claim
54 words
Apparatus according to claim 1, said film comprising in a single reel, alternately spaced frames of said first and second series of frames, and rotatable filter means for presenting an infrared pass only filter to said second series of frames and a visible light only pass filter to said first series of film frames.
Claim 5
Dependent Claim
60 words
Apparatus according to claim 1, said film comprising separate reels of said respective first and second series of frames; said projection apparatus comprising a separate projector for each of said reels; and said filter means being positioned with a visible light pass filter and an infrared pass filter respectively between said first and second series film frames and said screen.
Claim 6
Dependent Claim
15 words
Apparatus according to claim 1, said pattern arrangement being a quadrant arrangement of infrared sensors.
Claim 7
Dependent Claim
121 words
Apparatus according to claim 1, said projector means having a film sync signal generator; said logic circuit comprising a trigger switch and one shot multivibrator; a triple enabling input AND gate for each sensor channel; said AND gate being connected to receive inputs from said multivibrator, said sync signal generator, and from its associated channel signal output to provide a digital "zero" output signal when any input is zero, and otherwise to provide a digital "one" output; and a ROM connected to receive said digital inputs and programmed to energize specific ROM output lines corresponding to the digital number inputs from said AND gate and hence to the activation or lack of activation, or combination of both, relating to said sensors.
Claim 8
Dependent Claim
55 words
Apparatus according to claim 6, including indicator means having a plurality of input lines connectable each to one of said ROM output lines; said indicator means having the capability of producing a different signal for each input line energized to thereby indicate to a trainee a hit, miss, or a specific area of near miss.
Claim 9
Dependent Claim
59 words
Apparatus according to claim 7, including indicator means comprising a multi-array of lights, a multichannel tape recorder and a multichannel counter, each having an input connected to a corresponding output of said ROM to provide visual, audio and recorded indication of miss, hit, and area of near miss, responsive to the activation or lack of activation of said sensors.
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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) | 1979-06-22 | 1979-12-22 | 1980-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-22 | 1983-12-22 | 1984-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-22 | 1987-12-22 | 1988-06-22 | $7700.00 | Window Closed / Lapsed |