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US3726033A
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US
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Electric visual display
Assignee: Individual
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Filing: 1971-01-29
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Granted: 1973-04-10
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Expires: 1991-01-29
Abstract
Abstract An electric visual display device includes a chart board with display indicia and a separate light for each indicia. Each light is connected by a pair of leads to different coil spring terminals on a terminal bar on the back of the board, and the spring terminals are connected through a separable connector to a switching box having a plurality of female switch portions. A pair of male switch portions are connected to a low voltage DC power supply. Each light circuit is energized, one at a time, by selectively closing a pair of switches formed by said male and female portions. The circuitry provides that N pairs of female switch portions will control at least N2 lights.
Inventors
- 👤 L Benton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:05
CPC Classifications
G; G09; G09B; G09B5/00; G09B5/02; G09B29/00; G09B29/10; G09B29/102; Y; Y10; Y10S; Y10S40/00; Y10S40/902
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
140 words
An electrical visual display device comprising, in combination: a. a chart board having a plurality of display indicia thereon, b. a separate light mounted on said board at at least some of said plurality of display indicia, c. a control panel including a power supply connections means and a first plurality of selectively operable switching means connected to one side of said power supply connection means and a corresponding second plurality of selectively operable switching means connected to the opposite side of said power supply connection means for lighting said lights individually, d. and a unidirectional conducting circuit means connected in series with said lights between selected pairs of said first and second plurality of switching means and blocking circulating current except through the associated light whereby N pairs of first and second switching means controls at least N2 lights.
Claim 2
Dependent Claim
140 words
An electrical visual display device comprising, in combination: a. a chart board having a plurality of display indicia thereon, b. a separate light mounted on said board at at least some of said plurality of display indicia, c. a control panel including a power supply connections means and a first plurality of selectively operable switching means connected to one side of said power supply connection means and a corresponding second plurality of selectively operable switching means connected to the opposite side of said power supply connection means for lighting said lights individually, d. and a unidirectional conducting circuit means connected in series with said lights between selected pairs of said first and second plurality of switching means and blocking circulating current except through the associated light whereby N pairs of first and second switching means controls at least N2 lights.
Claim 3
Dependent Claim
145 words
An electrical visual display device comprising, in combination: a. a chart board having a plurality of display indicia thereon, b. a separate light mounted on said board at at least some of said plurality of display indiciA, c. a pair of wire leads connected to and extending from each light, d. a control panel including a plurality of switches connected in pairs to a common power connection means, e. circuit means connecting each lead of each said pair of leads to a different open switch portion and including current inhibiting means to effectively block circulating current except through the associated light, f. and means for selectively closing at least one pair of switches at a time to actuate the respective light connected through said circuit means, g. the construction and circuit connections being such that N pair of switches may control at least N2 lights.
Claim 4
Dependent Claim
145 words
An electrical visual display device comprising, in combination: a. a chart board having a plurality of display indicia thereon, b. a separate light mounted on said board at at least some of said plurality of display indiciA, c. a pair of wire leads connected to and extending from each light, d. a control panel including a plurality of switches connected in pairs to a common power connection means, e. circuit means connecting each lead of each said pair of leads to a different open switch portion and including current inhibiting means to effectively block circulating current except through the associated light, f. and means for selectively closing at least one pair of switches at a time to actuate the respective light connected through said circuit means, g. the construction and circuit connections being such that N pair of switches may control at least N2 lights.
Claim 5
Dependent Claim
67 words
The display device of claim 2 wherein said circuit means includes: a. a terminal bar mounted on the rear of said chart board, b. a plurality of coil springs mounted on said bar, c. the ends of each said pair of wire leads being secured between coils of different springs, d. and leads connecting each of said last-named coil springs to a different pair of switch portions.
Claim 6
Dependent Claim
54 words
The display device of claim 2: a. which includes an electric current supply source, b. wherein each said open switch portion comprises a female switch receptacle, c. and a pair of male switch plugs connected to said source for engagement with a desired pair of switch portions to provide the said switch closing means.
Claim 7
Dependent Claim
49 words
The display device of claim 2 a. which includes a power source of low voltage D.C. current adapted to be connected to said circuit means by said switches, b. and wherein said isolating means includes means in one lead of each said pair of leads to block back-current therein.
Claim 8
Dependent Claim
13 words
The device of claim 5 in which said last-named means comprises a diode.
References Cited (Backward Citations)
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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) | 1976-04-09 | 1976-10-09 | 1977-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-09 | 1980-10-09 | 1981-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-09 | 1984-10-09 | 1985-04-10 | $7700.00 | Window Closed / Lapsed |