US3711831A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pattern scanning system
Assignee: Panasonic Holdings Corp
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Filing: 1971-02-02
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Granted: 1973-01-16
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Expires: 1991-02-02
Abstract
Abstract A pattern search means used for a pattern recognition system, wherein a pattern such as a written character is searched by an electronic beam spot which scans the field along a line having at least two parts of different inclination such as a sinusoidal waveform, semi-circle or bent straight line, instead of a single straight line as used in the conventional system.
Inventors
- 👤 T Kaneko
- 👤 N Sezaki
- 👤 H Katagiri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:15
CPC Classifications
G; G06; G06K; G06K11/00; G06K11/02
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
177 words
A pattern search means used for a pattern recognition system, comprising, in combination: means for scanning a phosphor screen with an electron beam spot, said scanning means comprising horizontal and vertical deflection plates operatively associated with said electron beam spot; means for generating a saw-tooth horizontal sweep voltage connected to said horizontal deflection plates; means for generating a saw-tooth vertical sweep voltage; means for generating a periodically varying voltage in one-to-one synchronization with said horizontal sweep voltage, the output of said horizontal sweep generating means being connected to the input of said periodic voltage generating means; means for superimposing the output of said periodic voltage generating means on said vertical sweep voltage, said superimposing means being connected to said vertical deflection plates to thereby produce a scanning trace having at least two parts of different inclination; optical means for projecting an image of said phosphor screen on a sheet which has a pattern to be recognized thereon; and photo-electric means for detecting the image of said beam spot on said sheet when said image hits said pattern.
Claim 2
Dependent Claim
177 words
A pattern search means used for a pattern recognition system, comprising, in combination: means for scanning a phosphor screen with an electron beam spot, said scanning means comprising horizontal and vertical deflection plates operatively associated with said electron beam spot; means for generating a saw-tooth horizontal sweep voltage connected to said horizontal deflection plates; means for generating a saw-tooth vertical sweep voltage; means for generating a periodically varying voltage in one-to-one synchronization with said horizontal sweep voltage, the output of said horizontal sweep generating means being connected to the input of said periodic voltage generating means; means for superimposing the output of said periodic voltage generating means on said vertical sweep voltage, said superimposing means being connected to said vertical deflection plates to thereby produce a scanning trace having at least two parts of different inclination; optical means for projecting an image of said phosphor screen on a sheet which has a pattern to be recognized thereon; and photo-electric means for detecting the image of said beam spot on said sheet when said image hits said pattern.
Claim 3
Dependent Claim
24 words
A pattern search means as defined in claim 1, wherein said means for generating a periodically varying voltage is a triangular wave signal generator.
Claim 4
Dependent Claim
24 words
A pattern search means as defined in claim 1, wherein said means for generating a periodically varying voltage is a sinusoidal wave signal generator.
Claim 5
Dependent Claim
24 words
A pattern search means as defined in claim 1, wherein said means for generating a periodically varying voltage is a semi-circular wave signal generator.
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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |