Patent US4157482A successfully refreshed from Google Patents.
US4157482A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotation detecting device
Assignee: Niles Parts Co Ltd
•
Filing: 1977-12-01
•
Granted: 1979-06-05
•
Expires: 1997-12-01
Abstract
Abstract A compact rotation detecting device in which a rotor providing a set and a reset permanent magnets, a disk providing a plurality of wires having Wiegand effect in the radial direction of the disk, and spiral coils mounted on plural insulating disks are assembled in a housing case in a stack fashion, the spiral coils being automatically connected in series by the assembly, and upon rotation of the rotor pulse frequency proportional to the amount of the rotor's rotation being derived from the series connection of the spiral coils.
Inventors
- 👤 Mikio Kakinuma
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:58
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/45; G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P3/48; G01P3/481; G01P3/4815
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
141 words
A rotation detecting device comprising a housing case, a lid of said housing case, a rotor having a set and a reset permanent magnets and a shaft for rotating said rotor, a disk providing a plurality of wires having Wiegand effect in the radial direction of said disk, coil blocks having an insulating plate mounting spiral coils for producing a pulse current by operation of said wires having Wiegand effect upon the rotation of said rotor, and terminals mounted on said insulating plate of said coil block and extended from a first surface on which said spiral coil is mounted to a second surface opposit to said first surface of said insulating plate for automatically connecting said spiral coils on said coil blocks in series upon assembly of said coil blocks by insertion of said coil blocks into said housing case.
Claim 2
Dependent Claim
141 words
A rotation detecting device comprising a housing case, a lid of said housing case, a rotor having a set and a reset permanent magnets and a shaft for rotating said rotor, a disk providing a plurality of wires having Wiegand effect in the radial direction of said disk, coil blocks having an insulating plate mounting spiral coils for producing a pulse current by operation of said wires having Wiegand effect upon the rotation of said rotor, and terminals mounted on said insulating plate of said coil block and extended from a first surface on which said spiral coil is mounted to a second surface opposit to said first surface of said insulating plate for automatically connecting said spiral coils on said coil blocks in series upon assembly of said coil blocks by insertion of said coil blocks into said housing case.
Claim 3
Dependent Claim
61 words
A rotation detecting device according to claim 1, further comprising a ring to be mounted to the bearing mounted in said housing case and used for said shaft, which ring acting as a fastener for fastening said disk having wires and said coil blocks with said housing case thereby to increase the electric connection between said spiral coils and said terminals.
Claim 4
Dependent Claim
102 words
A rotation detecting device according to claim 1, further comprising cavities provided at peripheral portions of said disk having said wires and said coil blocks for achieving a predetermined alignment between said disk having said wires and said coil blocks in order to correctly contact said spiral coils with said terminals on said insulating plates and a projected portion provided on the inner surface of said housing case for contacting said cavities of said disk having said wires and said coil blocks with said projected portion thereby to achieve said predetermined alignment between said disk having said wire and said coil blocks.
Claim 5
Dependent Claim
35 words
A rotation detecting device according to claim 1, wherein said spiral coil is comprised of a slight strip of copper foil deposited on said insulating plate by a suitably adhesive material in a spiral shape.
Claim 6
Dependent Claim
31 words
A rotation detecting device according to claim 1, wherein said spiral coil is comprised of a thin conductive strip printed and wired on an insulating board as a printed wiring board.
References Cited (Backward Citations)
US3279959A
Cited
US3820090A
Cited
US3892118A
Cited
US3818465A
Cited
US3866193A
Cited
US3757754A
Cited
US3780313A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-06-04 | 1982-12-04 | 1983-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-06-04 | 1986-12-04 | 1987-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-06-04 | 1990-12-04 | 1991-06-05 | $7700.00 | Window Closed / Lapsed |