Patent US3863214A successfully refreshed from Google Patents.
US3863214A
Expired / Lapsed
US
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Supplemental visual display for traffic signal
Assignee: Individual
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Filing: 1973-07-19
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Granted: 1975-01-28
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Expires: 1993-07-19
Abstract
Abstract A supplemental visual display cooperates with a traffic signal for indicating the operational mode thereof. An arm supporting a visual display at one end is raised by an electric motor in response to an electric signal from the traffic signal controller and, thereafter, is normally retained in the upright position by an electromagnet. When the electromagnet is relaxed, in accordance with one operational mode of the controller, the arm pivots downwardly to exhibit the visual display.
Inventors
- 👤 Jr John W Kerr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:21
CPC Classifications
G; G08; G08G; G08G1/00; G08G1/09; G08G1/095
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
172 words
For use in combination with an electrical signalling device which includes an electrical controller, a source of continuous eLectrical energy supplied to said controller, and at least one perceptible signal periodically activated in response to said controller, a supplemental visual display device cooperating with said signalling device and for operating in response to failure of said perceptible signal, said visual display comprising: a. an electric motor having a power output shaft freely rotatable in one direction and rotatable in the other direction in response to an electric signal; b. an arm secured at one end to said power output shaft and rotatable therewith to freely fall in one direction and to be raised thereby in the other direction; c. a plate bearing selective indicia carried by the free end of said arm; d. electromagnetic means for normally retaining said arm in a raised position; and e. normally closed switch means associated with the electric signal to said motor and opened by said arm when said arm is retained by said electromagnetic means.
Claim 2
Dependent Claim
172 words
For use in combination with an electrical signalling device which includes an electrical controller, a source of continuous eLectrical energy supplied to said controller, and at least one perceptible signal periodically activated in response to said controller, a supplemental visual display device cooperating with said signalling device and for operating in response to failure of said perceptible signal, said visual display comprising: a. an electric motor having a power output shaft freely rotatable in one direction and rotatable in the other direction in response to an electric signal; b. an arm secured at one end to said power output shaft and rotatable therewith to freely fall in one direction and to be raised thereby in the other direction; c. a plate bearing selective indicia carried by the free end of said arm; d. electromagnetic means for normally retaining said arm in a raised position; and e. normally closed switch means associated with the electric signal to said motor and opened by said arm when said arm is retained by said electromagnetic means.
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) | 1978-01-27 | 1978-07-29 | 1979-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-27 | 1982-07-29 | 1983-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-27 | 1986-07-29 | 1987-01-28 | $7700.00 | Window Closed / Lapsed |