US3256014A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Display device with two rheostats
Assignee: Technical Displays Inc
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Filing: 1963-04-05
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Granted: 1966-06-14
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Expires: 1983-04-05
Abstract
No abstract record available.
Inventors
- 👤 Norman F Kelsey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:38
CPC Classifications
G; G09; G09F; G09F13/00; G09F13/04; G09F13/12; G02; G02B; G02B30/00; G02B30/50; G02B30/56
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A NOVEL DISPLAY DEVICE COMPRISING A HOUSING CONTAINING A LIGHT TRANSMITTING MIRROR DIVIDING THE HOUSING INTO A FRONT SECTION AND A REAR SECTION, FRON ILLUMINATING MEANS ADAPTED TO ILLUMINATE SAID FRONT SECTION AND REAR ILLUMINATING MEANS ADAPTED TO ILLUMINATE SAID REAR SECTION, AND LIGHT CONTROL MEANS TO SEQUENTIALLY AND ALTERNATELY BRIGHTEN ONE OF SAID ILLUMINATING MEANS WHILE SIMULTANEOUSLY DARKENING THE OTHER OF SAID ILLUMINATING MEANS, SAID LIGHT CONTROL MEANS COMPRISING A FIRST RHEOSTAT IN THE CIRCUIT OF SAID FRONT ILLUMINATING MEANS AND A SECOND RHEOSTAT IN THE CIRCUIT OF SAID REAR ILLUMINATING MEANS, SAID RHEOSTATS BEING SEPARATE FROM EACH OTHER AND BEING DISPOSED IN OPPOSING RELATIONSHIP WITH RESPECT TO EACH OTHER, AND EACH RHEOSTAT INCLUDING A SEPARATE RESISTANCE DIVIDING ARM WHICH IS ADAPTED TO BE OSCILLATED WITH THE ARM OF THE OTHER RHEOSTAT IN A FIRST SENSE AND THEN IN A SECOND SENSE, MOTOR MEANS FOR SEPARATELY OSCILLATING SAID ARMS, THE RESISTANCE IN THE RESPECTIVE CIRCUITS
Claim 2
Dependent Claim
156 words
A NOVEL DISPLAY DEVICE COMPRISING A HOUSING CONTAINING A LIGHT TRANSMITTING MIRROR DIVIDING THE HOUSING INTO A FRONT SECTION AND A REAR SECTION, FRON ILLUMINATING MEANS ADAPTED TO ILLUMINATE SAID FRONT SECTION AND REAR ILLUMINATING MEANS ADAPTED TO ILLUMINATE SAID REAR SECTION, AND LIGHT CONTROL MEANS TO SEQUENTIALLY AND ALTERNATELY BRIGHTEN ONE OF SAID ILLUMINATING MEANS WHILE SIMULTANEOUSLY DARKENING THE OTHER OF SAID ILLUMINATING MEANS, SAID LIGHT CONTROL MEANS COMPRISING A FIRST RHEOSTAT IN THE CIRCUIT OF SAID FRONT ILLUMINATING MEANS AND A SECOND RHEOSTAT IN THE CIRCUIT OF SAID REAR ILLUMINATING MEANS, SAID RHEOSTATS BEING SEPARATE FROM EACH OTHER AND BEING DISPOSED IN OPPOSING RELATIONSHIP WITH RESPECT TO EACH OTHER, AND EACH RHEOSTAT INCLUDING A SEPARATE RESISTANCE DIVIDING ARM WHICH IS ADAPTED TO BE OSCILLATED WITH THE ARM OF THE OTHER RHEOSTAT IN A FIRST SENSE AND THEN IN A SECOND SENSE, MOTOR MEANS FOR SEPARATELY OSCILLATING SAID ARMS, THE RESISTANCE IN THE RESPECTIVE CIRCUITS
References Cited (Backward Citations)
US2487307A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |