US4740839A
Expired / Lapsed
US
⏱️ 0.0 years remaining
TV surveillance system that requires no mechanical motion
Assignee: Individual
•
Filing: 1987-06-12
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Granted: 1988-04-26
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Expires: 2007-06-12
Abstract
Abstract This invention provides a method of providing TV surveillance without the need for cumbersome pan and tilt mechanisms. The method involves underscanning a conventional TV camera and dynamically moving the resultant reduced size raster over the photo conductive surface. Movement of the raster over the photo conductive surface emulates the vertical and horizontal movement provided by the pan and tilt mechanism.
Inventors
- 👤 William R. Phillips
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:02
CPC Classifications
G; G08; G08B; G08B13/00; G08B13/18; G08B13/189; G08B13/194; G08B13/196; G08B13/19617; G08B13/19626; G08B13/19634; G08B13/19636; H; H04; H04N; H04N23/00; H04N23/40; H04N7/00; H04N7/18; H04N7/183
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
A surveillance system comprising a TV camera located fixly such that a scene having a plurality of area will be reviewed, said camera having a vidicon photo conductive surface, circuit means connected to said camera such that the vertical and horizontal deflection coil drive circuitry can be changed such that a reduction of the electron beam scanning raster on the vidicon photo conductive surface will be obtained so as to underscan the scene, controlling the circuit means such that the scene can be scanned area by area even though the camera is located fixly, a monitor connected to said camera for viewing the areas scanned by the camera, and control means connected to the circuitry whereby a specific area of a specific size can be scanned and reviewed by said monitor.
Claim 2
Dependent Claim
131 words
A surveillance system comprising a TV camera located fixly such that a scene having a plurality of area will be reviewed, said camera having a vidicon photo conductive surface, circuit means connected to said camera such that the vertical and horizontal deflection coil drive circuitry can be changed such that a reduction of the electron beam scanning raster on the vidicon photo conductive surface will be obtained so as to underscan the scene, controlling the circuit means such that the scene can be scanned area by area even though the camera is located fixly, a monitor connected to said camera for viewing the areas scanned by the camera, and control means connected to the circuitry whereby a specific area of a specific size can be scanned and reviewed by said monitor.
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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) | 1991-04-26 | 1991-10-26 | 1992-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-26 | 1995-10-26 | 1996-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-26 | 1999-10-26 | 2000-04-26 | $7700.00 | Window Closed / Lapsed |