US3916403A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for the rapid indication of visual information arranged in a mosaic system by means of magnetic indicating elements
Assignee: FOK GYEM FINOMMECH ELEKT
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Filing: 1973-02-12
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Granted: 1975-10-28
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Expires: 1993-02-12
Abstract
Abstract Apparatus for the indication of visual information arranged in a mosaic system by means of magnetic indicating elements, at high speed, in which the iron cores of the controlling electromagnets of the magnetic indicating elements are formed partially or entirely of a hard magnetic material, the coercivity of which is adjusted to a value lower than the coercivity of the permanent magnet components indicating the information, so that the programming speed of the information can be rendered independent of the indicating times, thus ensuring a high speed indication.
Inventors
- 👤 Jozsef Mandzsu
- 👤 Laszlo Jagicza
- 👤 Sandor Jodal
- 👤 Lajos Ducza
- 👤 Laszlo Avarosi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:09
CPC Classifications
G; G08; G08B; G08B5/00; G08B5/22; G08B5/24
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
131 words
In apparatus for the indication of visual information by means of magnetic indicating elements arranged in a mosaic system, comprising permanent magnet flip-members displaying the information on a base panel and electromagnets excitable in a bipolar manner to control the flip-members, the electromagnets having excitation coil means whose leads are connected to an electronic control unit by which bipolar signals for excitation of the coils are emitted; the improvement in which the electromagnets have iron cores consisting at least in part of a hard magnetic material having remanent magnetism the coercivity of which is smaller than the coercivity of said permanent magnetic flip-members, the permanent magnet flip-members having a smaller magnetic field strength than that required for the demagnetization of the iron core of the associated electromagnet in the operative condition.
Claim 2
Dependent Claim
131 words
In apparatus for the indication of visual information by means of magnetic indicating elements arranged in a mosaic system, comprising permanent magnet flip-members displaying the information on a base panel and electromagnets excitable in a bipolar manner to control the flip-members, the electromagnets having excitation coil means whose leads are connected to an electronic control unit by which bipolar signals for excitation of the coils are emitted; the improvement in which the electromagnets have iron cores consisting at least in part of a hard magnetic material having remanent magnetism the coercivity of which is smaller than the coercivity of said permanent magnetic flip-members, the permanent magnet flip-members having a smaller magnetic field strength than that required for the demagnetization of the iron core of the associated electromagnet in the operative condition.
Claim 3
Dependent Claim
21 words
Apparatus as claimed in claim 1, in which said permanent magnet flip-members are made at least in part of barium ferrite.
Claim 4
Dependent Claim
46 words
Apparatus as claimed in claim 1, said flip-members being in the form of flat flip-leaves pivotally mounted on the panel at one edge of each flip-leaf for pivotal movement about an axis parallel to the panel to occupy one of two rest positions against the panel.
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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |