Patent US3794876A successfully refreshed from Google Patents.
US3794876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deflection circuit for an electron beam in a cathode-ray tube
Assignee: US Philips Corp
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Filing: 1972-08-30
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Granted: 1974-02-26
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Expires: 1992-08-30
Abstract
Abstract A deflection circuit for an electron beam formed with an electrode system suitable for both focussing and deflection, which system includes an electrode dividend in segments. The electrode segments are incorporated in a bridge circuit built up from resistors while two deflection signal generators are each connected to two bridge connection points. A focussing voltage source is connected to a central connection point of a bridge cross branch so that the source and the generators are mutually decoupled.
Inventors
- 👤 Alphen W Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:16
CPC Classifications
H; H04; H04N; H04N3/00; H04N3/10; H04N3/16; H04N3/26; H01; H01J; H01J29/00; H01J29/46; H01J29/465; H04N3/24
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
90 words
An electrostatic deflection and focussing circuit for a caThode ray tube including a plurality of opposite electrode segments symmetrically arranged about a central axis, comprising in combination, a bridge circuit having two pairs of opposite junctions connected to assigned pairs of electrode segments, two sources of deflection signals each connected to a pair of said junctions, a crossed connection of four resistances having a common point and four terminal points connected to said junctions, respectively, and a source of a focusing voltage having a terminal connected to said common point.
Claim 2
Dependent Claim
90 words
An electrostatic deflection and focussing circuit for a caThode ray tube including a plurality of opposite electrode segments symmetrically arranged about a central axis, comprising in combination, a bridge circuit having two pairs of opposite junctions connected to assigned pairs of electrode segments, two sources of deflection signals each connected to a pair of said junctions, a crossed connection of four resistances having a common point and four terminal points connected to said junctions, respectively, and a source of a focusing voltage having a terminal connected to said common point.
Claim 3
Dependent Claim
46 words
A circuit as claimed in claim 1, characterized in that a distributing circuit to which the focussing voltage source is connected is provided between the common point of the said crossed connection, which distributing circuit causes an inequality in the voltages applied to the common point.
Claim 4
Dependent Claim
43 words
A circuit as claimed in claim 2, characterized in that the distributing circuit is formed with a bridge circuit including a potentiometer which is arranged between the said common point, while a wiper on the potentiometer is connected to the focussing voltage source.
Claim 5
Dependent Claim
42 words
A circuit as claimed in claim 1, charachterzied in that a deflection signal generator having output terminals coupled by capacitors to the bridge junctions and an adjustable direct voltage source connected in parallel to said junctions for supplying a shift direct current.
Claim 6
Dependent Claim
41 words
A circuit as claimed in claim 4, characterized in that capacitors are arranged in parallel with the resistors which are connected to those bridge junctions and are connected to the deflection signal generator which provides a volrage of a higher frequency.
Claim 7
Dependent Claim
26 words
A circuit as claimed in claim 1, characterized in that the bridge circuit is provided with resistors in integrated form mounted on the cathode ray tube.
Claim 8
Dependent Claim
31 words
A cathode-ray tube provided with a deflection circuit as claimed in claim 6, characterized in that the resistors are provided in an integrated form on the wall of the cathode-ray tube.
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) | 1977-02-25 | 1977-08-27 | 1978-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-25 | 1981-08-27 | 1982-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-25 | 1985-08-27 | 1986-02-26 | $7700.00 | Window Closed / Lapsed |