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US3766778A
Expired / Lapsed
US
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Method and means for analyzing barrels and ammunition on the basis of buckshot scatter
Assignee: Individual
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Filing: 1972-11-21
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Granted: 1973-10-23
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Expires: 1992-11-21
Abstract
Abstract The number and distribution of hits by buckshot pellets on a test area are analyzed by moving the test area relative to a sensor that covers a zone smaller than the area and approximates the size of a typical target such as a clay pigeon. The sensor produces a test signal each time it senses a penetration of the test area due to a hit. An oscillator produces timing signals. A counter counts the number of coincidences of timing signals with test signals. A divider compares the total number of timing signals with the number of coincidences for predetermined time periods. Each time period represents a region of the test area covered by the sensor. According to one embodiment, the sensor covers successive annular regions of the test area. According to another embodiment, the sensor travels along parallel lines and then along other parallel lines transverse to the first parallel lines.
Inventors
- 👤 E Hendrichsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:11
CPC Classifications
F; F41; F41J; F41J5/00; F41J5/14; F41J5/16; F41J5/02
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
84 words
The method of determining the quality of gun barrels and ammUnition by analyzing the distribution of indications of hits produced by pellets on a test surface, which comprises moving the test surface and a sensor having a given area along a predetermined pattern relative to each other and at predetermined rates, producing a test signal whenever the sensor coincides with an indication, producing timing signals for establishing a measuring interval, and counting the number of coincidences of a timing signal with a test signal.
Claim 2
Independent Claim
84 words
The method of determining the quality of gun barrels and ammUnition by analyzing the distribution of indications of hits produced by pellets on a test surface, which comprises moving the test surface and a sensor having a given area along a predetermined pattern relative to each other and at predetermined rates, producing a test signal whenever the sensor coincides with an indication, producing timing signals for establishing a measuring interval, and counting the number of coincidences of a timing signal with a test signal.
Claim 3
Dependent Claim
22 words
A method as in claim 1, further comprising the step of comparing the number of coincidences with the number of time signals.
Claim 4
Dependent Claim
26 words
The method as in claim 1, wherein the predetermined pattern is a spiral so that the sensor moves relative to the surface along a spiral path.
Claim 5
Dependent Claim
33 words
A method as in claim 3, further comprising the step of repetitively counting the number of coincidences for different portions of the spiral each time the sensor traverses the portion of the spiral.
Claim 6
Dependent Claim
30 words
A method as in claim 4, further comprising the step of comparing the number of coincidences with the number of timing signals for each of the portions of the spiral.
Claim 7
Dependent Claim
114 words
A method as in claim 1, further comprising the step of determining the center of the distribution of indications, said step of determining the center including moving the sensor and the surface relative to each other so that the sensor moves along parallel lines in one direction and then moves along parallel lines perpendicular to the parallel lines of the other direction, counting the number of coincidences of timing signals with test signals for each line traversed by the sensor relative to the surface, determining the line representing the midpoint of the number of coincidences in each direction so as to establish the center point from the intersection of the lines in each direction.
Claim 8
Independent Claim
120 words
A device for determining the quality of gun barrels and ammunition by analyzing the distribution of indications produced by buckshot on a test surface, comprising a sensor near the surface, drive means for moving the sensor and the surface relative to each other along a predetermined pattern, said sensor having signal-producing means for producing a test signal whenever the sensor coincides in position with an indication, signal generator means for producing a plurality of timing signals to establish measuring intervals, counting means coupled to said sensor and said signal generator means for counting the number of coincidences of timing signals with test signals, said driving means moving said test surface and said sensor relative to each other at predetermined speeds.
Claim 9
Independent Claim
120 words
A device for determining the quality of gun barrels and ammunition by analyzing the distribution of indications produced by buckshot on a test surface, comprising a sensor near the surface, drive means for moving the sensor and the surface relative to each other along a predetermined pattern, said sensor having signal-producing means for producing a test signal whenever the sensor coincides in position with an indication, signal generator means for producing a plurality of timing signals to establish measuring intervals, counting means coupled to said sensor and said signal generator means for counting the number of coincidences of timing signals with test signals, said driving means moving said test surface and said sensor relative to each other at predetermined speeds.
Claim 10
Dependent Claim
17 words
A device as in claim 7, wherein said driving means moves said sensor along a spiral pattern.
Claim 11
Dependent Claim
26 words
A device as in claim 7, further comprising divider means for comparing the number of coincidences with the number of timing pulses over successive time periods.
Claim 12
Dependent Claim
17 words
A device as in claim 9, wherein said driving means moves said sensor along a spiral pattern.
Claim 13
Dependent Claim
30 words
A device as in claim 7, wherein said drive means includes rotating means for rotating the surface and linear drive means for moving the sensor radially relative to the surface.
Claim 14
Dependent Claim
59 words
A device as in claim 7, wherein said driving means includes linear moving means for moving the sensor and the surface relative to each other so the sensor moves along consecutive parallel paths in one direction and for moving the sensor and the surface relative to each other so said sensor traverses parallel lines transverse to the one direction.
Claim 15
Dependent Claim
47 words
A device as in claim 7, wherein said sensor includes a light source, light-sensitive means, and aperture forming means between the light sources and said light-sensitive means, the indications being in the form of perforations, said surface being positioned between said light source and said light-sensitive means.
Claim 16
Dependent Claim
33 words
A device as in claim 13, wherein said sensor includes a lens system arranged between said aperture forming means and said light-sensitive means for collecting light rays passing through the apertuRe forming means.
Claim 17
Dependent Claim
19 words
A device as in claim 7, further comprising a second sensor for simultaneously sensing another portion of the surface.
Claim 18
Dependent Claim
20 words
A device as in claim 7, further comprising digital means coupled to said counting means for indicating the results digitally.
Claim 19
Dependent Claim
24 words
A device as in claim 10, further comprising digital means responsive to said divider means for indicating the output of said divider means digitally.
References Cited (Backward Citations)
US197398A
Cited
US2122710A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |