Patent US3631475A successfully refreshed from Google Patents.
US3631475A
Expired / Lapsed
US
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Electromechanical indicator device
Assignee: FELDIX GmbH
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Filing: 1969-12-05
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Granted: 1971-12-28
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Expires: 1989-12-05
Abstract
Abstract An electromechanical rotary indicating device for selectively displaying a plurality of symbols having a cylindrical permanent magnet rotor, to which a symbol-carrying member is coupled, which is selectively deflectable to a plurality of discrete angularly spaced positions by selective energization of the excitation coils or windings placed on the pole pieces of the stator. The periphery or surface of the rotor is provided with a plurality of longitudinal or axial grooves which are arranged asymmetrically with respect to the direction of the magnetic field in the rotor, which direction is transverse to the axis of rotation of the rotor.
Inventors
- 👤 Gerhard Quandt
- 👤 Hans-Christian Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 19:20
CPC Classifications
H; H02; H02K; H02K37/00; H02K37/10; H02K37/12; G; G08; G08B; G08B5/00; G08B5/22; G08B5/24; G09; G09F; G09F11/00; G09F11/02; G09F11/04; G09F11/23
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
193 words
In an electromechanical rotary indicating device for selectively displaying a plurality of symbols in response to electrical energization, said indicating device being of the type including a stator having a plurality of magnetizable pole pieces having respective excitation windings thereon, a cylindrical permanent magnet rotor/rotatably mounted between said pole pieces for deflection about an axis transverse to the direction of magnetization of said rotor to a plurality of discrete angularly spaced positions, and a carrier having thereon the symbols to be indicated and coupled to said rotor, the improvement that said rotor is provided in its periphery, at least in the portion thereof adjacent to the magnetic poles, with a plurality of longitudinal grooves which are substantially parallel to the rotor axis and which define a plurality of rotor poles therebetween, said direction of magnetization of said rotor passing through at least one of said rotor poLes and being rotated by a small angle with respect to a line of symmetry for said rotor passing through said at least one of said rotor poles whereby said plurality of longitudinal grooves are arranged asymmetrically with respect to said direction of magnetization of said rotor.
Claim 2
Dependent Claim
193 words
In an electromechanical rotary indicating device for selectively displaying a plurality of symbols in response to electrical energization, said indicating device being of the type including a stator having a plurality of magnetizable pole pieces having respective excitation windings thereon, a cylindrical permanent magnet rotor/rotatably mounted between said pole pieces for deflection about an axis transverse to the direction of magnetization of said rotor to a plurality of discrete angularly spaced positions, and a carrier having thereon the symbols to be indicated and coupled to said rotor, the improvement that said rotor is provided in its periphery, at least in the portion thereof adjacent to the magnetic poles, with a plurality of longitudinal grooves which are substantially parallel to the rotor axis and which define a plurality of rotor poles therebetween, said direction of magnetization of said rotor passing through at least one of said rotor poLes and being rotated by a small angle with respect to a line of symmetry for said rotor passing through said at least one of said rotor poles whereby said plurality of longitudinal grooves are arranged asymmetrically with respect to said direction of magnetization of said rotor.
Claim 3
Dependent Claim
35 words
The electromechanical indicating device defined in claim 1, wherein said longitudinal grooves are equal in number to the number of said discrete angularly spaced positions, and are uniformly distributed about the periphery of said rotor.
Claim 4
Dependent Claim
24 words
The electromechanical indicating device defined in claim 2 wherein said longitudinal grooves extend over only a portion of the cylindrical surface of said rotor.
Claim 5
Dependent Claim
17 words
The electromechanical indicating device defined in claim 3 wherein the depth of said longitudinal grooves changes abruptly.
Claim 6
Dependent Claim
20 words
The electromechanical indicating device defined in claim 2 wherein the depth of said longitudinal grooves change along the length thereof.
Claim 7
Dependent Claim
29 words
The electromechanical indicating device defined in claim 3 wherein said longitudinal grooves extend from one end of said rotor for approximately one-half the length thereof with continuously decreasing depth.
Claim 8
Dependent Claim
23 words
The electromechanical indicating device defined in claim 3 wherein said rotor is comprised of a compressed mixture of magnetizable powder and a binder.
Claim 9
Dependent Claim
16 words
The electromechanical indicating device defined in claim 7 wherein said binder material is a hardening plastic.
Claim 10
Dependent Claim
41 words
An electromechanical indicating device as defined in claim 1 wherein said carrier is provided with 10 symbols thereon for selective indication, said stator is provided with five of said pole pieces, and said rotor is provided with 10 of said grooves.
Claim 11
Dependent Claim
61 words
An electromechanical indicating device as defined in claim 2 wherein said stator pole pieces are disposed in a plane parallel to the axis of rotation of said rotor and are magnetically connected together at one end thereof, said excitation windings being disposed about said pole pieces with the axes thereof also being parallel to the axis of rotation of said rotor.
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |