Patent US3705350A successfully refreshed from Google Patents.
US3705350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary magnetic disc circuit indicator
Assignee: Individual
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Filing: 1971-02-04
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Granted: 1972-12-05
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Expires: 1991-02-04
Abstract
Abstract A magnetic disc with north and south poles and with alternating light and dark segments is rotatably mounted adjacent a stator having circumferentially spaced pole elements of like polarity near the respective north and south poles of the magnet. A translucent disc having circumferentially spaced light and dark segments matching the segments of the magnetic element is stationarily mounted over the magnetic element. When the magnetic element is in one position, the dark segments of the magnetic element underlie dark segments of the translucent disc and hence the over-all appearance is one of light and dark segments. When the stator is magnetized by energizing an electric coil mounted within it, the magnet is shifted rotatably a distance sufficient to have the dark segments of the magnet align with light segments of the translucent disc whereupon the over-all appearance of the device is completely dark in contrast with the appearance first mentioned. The difference in appearance is depended upon to indicate the energized or de-energized condition of an electric circuit connected to the coil.
Inventors
- 👤 Robert L Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:43
CPC Classifications
G; G08; G08B; G08B5/00; G08B5/22; G08B5/24
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
241 words
A rotary electric circuit indicator comprising a header having electric leads thereon, a stator assembly mounted on said header and comprising a tubular stator of magnetic material having a first set of circuMferentially spaced pole elements adapted to be electrically energized to like polarity, a pole piece spaced from said station and having a second set of circumferentially spaced pole elements and an electric coil between said stator and said pole piece and connected to said leads, a magnet member having north and south pole elements rotatably mounted adjacent said sets of pole elements, said magnet member having circumferentially spaced are of contrasting visual character, a reference member stationarily mounted in a position overlying said magnet member, said reference member having circumferentially spaced areas of contrasting visual character similar to the areas of said magnet member, said magnet member having one rotary position between said first set of pole elements wherein like areas respectively on said magnet member and said reference member overlie each other and the relationship is productive of a net contrasting effect, said magnet member having another rotary position between said second set of pole elements wherein like areas on said magnet member and said reference member are in alternate positions and the relationship is productive of a net uniform visual effect, said magnet member being movable from one position to the other in response to changes in the electromagnetic condition of said stator and said pole elements.
Claim 2
Dependent Claim
241 words
A rotary electric circuit indicator comprising a header having electric leads thereon, a stator assembly mounted on said header and comprising a tubular stator of magnetic material having a first set of circuMferentially spaced pole elements adapted to be electrically energized to like polarity, a pole piece spaced from said station and having a second set of circumferentially spaced pole elements and an electric coil between said stator and said pole piece and connected to said leads, a magnet member having north and south pole elements rotatably mounted adjacent said sets of pole elements, said magnet member having circumferentially spaced are of contrasting visual character, a reference member stationarily mounted in a position overlying said magnet member, said reference member having circumferentially spaced areas of contrasting visual character similar to the areas of said magnet member, said magnet member having one rotary position between said first set of pole elements wherein like areas respectively on said magnet member and said reference member overlie each other and the relationship is productive of a net contrasting effect, said magnet member having another rotary position between said second set of pole elements wherein like areas on said magnet member and said reference member are in alternate positions and the relationship is productive of a net uniform visual effect, said magnet member being movable from one position to the other in response to changes in the electromagnetic condition of said stator and said pole elements.
Claim 3
Dependent Claim
23 words
A rotary electric circuit indicator as in claim 1 wherein the reference member is generally translucent and alternate areas thereon are generally opaque.
Claim 4
Dependent Claim
30 words
A rotary electric circuit indicator as in claim 1 wherein there are a plurality of light and dark areas comprising the areas of contrasting visual character on each respective member.
Claim 5
Dependent Claim
39 words
A rotary electric circuit indicator as in claim 1 wherein the coil has a separate lead at each end and common lead intermediate said ends whereby to enable energization of said coil with a polarity in alternatively different directions.
Claim 6
Dependent Claim
49 words
A rotary electric circuit indicator as in claim 1 wherein said stator has a magnetic base at the end adjacent said header and at a location spaced from and overlying said header, whereby to accommodate integrated circuit chips, and separate leads in said header for connection to such chips.
Claim 7
Dependent Claim
68 words
A rotary electric circuit indicator as in claim 1 wherein there is a core extending centrally through said coil and wherein said separate pole piece extends between said coil and said magnet member and has a section in engagement with said core, said second set of pole elements being part of said separate pole piece and located adjacent respective north and south pole elements of said magnet member.
Claim 8
Dependent Claim
34 words
A rotary electric circuit indicator as in claim 1 wherein there are three each of said areas of contrasting visual character and wherein the pole elements of said stator are spaced substantially 180* apart.
Claim 9
Dependent Claim
40 words
A rotary electric circuit indicator as in claim 1 wherein there is a tubular case attached to said header and surrounding said indicator, said reference member being a translucent member forming the end of said case remote from said header.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |