Patent US4150314A successfully refreshed from Google Patents.
US4150314A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Level amplitude output rotary speed transducer
Assignee: Robert Bosch GmbH
•
Filing: 1977-11-28
•
Granted: 1979-04-17
•
Expires: 1997-11-28
Abstract
Abstract A Wiegand wire forms part of a stator coil facing a rotor on which permanent magnets are located. The stator coil has two coil portions or coil sections which are wound or connected to provide opposing inductive outputs upon passage of the magnets in front of the coils to cancel each other, the Wiegand wire change of magnetization providing the additional read-out output, the amplitude of which will be independent of speed, but the recurrence rate will depend upon speed of the magnets passing the stator of transducer.
Inventors
- 👤 Erich Zabler
- 👤 Peter Hauler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:01
CPC Classifications
F; F02; F02P; F02P7/00; F02P7/06; F02P7/067; F02P7/0672; G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/481; G01P3/4815; G01P3/487; H; H02; H02N; H02N11/00; H02N11/002; H02N11/004
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
117 words
Pulse transducer to transduce a shaft speed into a series of electrical pulses, comprising a rotor (1) having a plurality of magnets (2) located thereon of alternate polarity; a stator including at least one coil (4) and comprising, in accordance with the invention, a Wiegand wire (5) surrounded by at least a portion of said coil (4), said coil having another portion not responsive to change of magnetic domain of the Wiegand wire upon passage of the magnets (2) of the rotor with respect thereto, said portions of the coil being so connected that the voltages induced in the coils due to passage of said magnets (2) of the rotor (1) oppose and essentially cancel each other.
Claim 2
Dependent Claim
117 words
Pulse transducer to transduce a shaft speed into a series of electrical pulses, comprising a rotor (1) having a plurality of magnets (2) located thereon of alternate polarity; a stator including at least one coil (4) and comprising, in accordance with the invention, a Wiegand wire (5) surrounded by at least a portion of said coil (4), said coil having another portion not responsive to change of magnetic domain of the Wiegand wire upon passage of the magnets (2) of the rotor with respect thereto, said portions of the coil being so connected that the voltages induced in the coils due to passage of said magnets (2) of the rotor (1) oppose and essentially cancel each other.
Claim 3
Dependent Claim
27 words
Transducer according to claim 1, wherein the stator includes two coils (3, 4) forming said coil sections, one of said coils (4) surrounding said Wiegand wire (5).
Claim 4
Dependent Claim
17 words
Transducer according to claim 2, wherein (FIG. 1) said coils are coaxial with respect to each other.
Claim 5
Dependent Claim
25 words
Transducer according to claim 2, wherein (FIG. 3) each coil is located in a region facing a magnetic element of the rotor of different polarity.
Claim 6
Dependent Claim
36 words
Transducer according to claim 2, wherein (FIG. 4) one of said coils (44) is located tangentially with respect to the rotor, and the other of said coils (43) is located radially with respect to the rotor.
Claim 7
Dependent Claim
24 words
Transducer according to claim 2, wherein (FIGS. 1, 3) both coils (3, 4; 33, 34) are located radially with respect to the rotor (1).
Claim 8
Dependent Claim
19 words
Transducer according to claim 6, wherein (FIG. 1) both coils (3, 4) are coaxial with respect to each other.
Claim 9
Dependent Claim
18 words
Transducer according to claim 2, wherein (FIG. 5) both coils are located tangentially with respect to the rotor.
Claim 10
Dependent Claim
18 words
Transducer according to claim 1, further including a threshold stage (10) connected to the output of said transducer.
Claim 11
Dependent Claim
18 words
Transducer according to claim 1, wherein said coil sections (3, 4) are inductively essentially separated from each other.
References Cited (Backward Citations)
US3279959A
Cited
US3820090A
Cited
US3892118A
Cited
US3818465A
Cited
US3866193A
Cited
US3757754A
Cited
US3780313A
Cited
US3969644A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-16 | 1982-10-16 | 1983-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-16 | 1986-10-16 | 1987-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-16 | 1990-10-16 | 1991-04-17 | $7700.00 | Window Closed / Lapsed |