US3303494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetically operated signs
Assignee: Ferranti Packard Ltd
•
Filing: 1966-02-14
•
Granted: 1967-02-07
•
Expires: 1986-02-14
Abstract
No abstract record available.
Inventors
- 👤 Taylor Maurice Kenyon
- 👤 Winrow Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:15
CPC Classifications
G; G09; G09G; G09G3/00; G09G3/20; G09G3/34; G09G3/3486; G08; G08B; G08B5/00; G08B5/22; G08B5/24; G09F; G09F9/00; G09F9/30; G09F9/37; G09F9/375
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
A SIGN FOR DISPLAYING INDICIA, COMPRISING: AN ARRAY OF MAGNETICALLY ACTUABLE INDICIA FORMING ELEMENTS DEFINING A VIEWING DIRECTION; EACH OF SAID ELEMENTS HAVING A SWINGABLY MOUNTED MEMBER; HAVING TWO SURFACES OF CONTRASTING APPEARANCE; AND CARRYING A PERMANENT MAGNET WITH POLES EXTENDING TRANSVERSELY TO THE AXIS OF ROTATION OF THE MEMBER; A MAGNETIC FIELD PRODUCING MEANS FOR CAUSING MOVEMENT OF SAID MEMBERS; INCLUDING A PAIR OF PERMANENTLY MAGNETIZABLE POLE FORMING MEMBERS; A PAIR OF FLUX-PERMEABLE MEMBERS JOINING EACH PAIR OF SAID POLE FORMING MEMBERS IN SEPARATE MAGNETIC PATHS; AN ELECTRICALLY CONDUCTING WINDING ASSOCIATED WITH EACH OF SAID FLUX-PERMEABLE MEMBERS ARRANGED AND CONSTRUCTED TO CREATE, WHEN ELECTRIC CURRENT IS FLOWING THEREIN, MAGNETIC FLUX IN THE FLUX-PERMEABLE MEMBER WITH WHICH IT IS ASSOCIATED; TO POLARIZE SAID POLE FORMING MEMBERS IN ONE OR ANOTHER POLARITY; SAID POLE FORMING MEMBERS WHEN SUFFICIENTLY MAGNETIZED BY SUCH FLUX BEING EFFECTIVE TO ROTATE SAID MAGNETICALLY ACTUABLE MEMBER BETWEEN TWO POSITIONS DETERMINED BY SAID RESPECTIVE POLARITIES; SAID CONTRASTING SURFACES BEING ARRANGED SO THAT ONE IS DISPLAYED IN THE VIEWING DIRECTION IN EACH OF SAID POSITIONS.
Claim 2
Dependent Claim
176 words
A SIGN FOR DISPLAYING INDICIA, COMPRISING: AN ARRAY OF MAGNETICALLY ACTUABLE INDICIA FORMING ELEMENTS DEFINING A VIEWING DIRECTION; EACH OF SAID ELEMENTS HAVING A SWINGABLY MOUNTED MEMBER; HAVING TWO SURFACES OF CONTRASTING APPEARANCE; AND CARRYING A PERMANENT MAGNET WITH POLES EXTENDING TRANSVERSELY TO THE AXIS OF ROTATION OF THE MEMBER; A MAGNETIC FIELD PRODUCING MEANS FOR CAUSING MOVEMENT OF SAID MEMBERS; INCLUDING A PAIR OF PERMANENTLY MAGNETIZABLE POLE FORMING MEMBERS; A PAIR OF FLUX-PERMEABLE MEMBERS JOINING EACH PAIR OF SAID POLE FORMING MEMBERS IN SEPARATE MAGNETIC PATHS; AN ELECTRICALLY CONDUCTING WINDING ASSOCIATED WITH EACH OF SAID FLUX-PERMEABLE MEMBERS ARRANGED AND CONSTRUCTED TO CREATE, WHEN ELECTRIC CURRENT IS FLOWING THEREIN, MAGNETIC FLUX IN THE FLUX-PERMEABLE MEMBER WITH WHICH IT IS ASSOCIATED; TO POLARIZE SAID POLE FORMING MEMBERS IN ONE OR ANOTHER POLARITY; SAID POLE FORMING MEMBERS WHEN SUFFICIENTLY MAGNETIZED BY SUCH FLUX BEING EFFECTIVE TO ROTATE SAID MAGNETICALLY ACTUABLE MEMBER BETWEEN TWO POSITIONS DETERMINED BY SAID RESPECTIVE POLARITIES; SAID CONTRASTING SURFACES BEING ARRANGED SO THAT ONE IS DISPLAYED IN THE VIEWING DIRECTION IN EACH OF SAID POSITIONS.
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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |