US3673446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Induction disc type relay
Assignee: Hitachi Ltd
•
Filing: 1970-11-19
•
Granted: 1972-06-27
•
Expires: 1990-11-19
Abstract
Abstract An induction disc type relay adapted to apply to an induction disc a rotational torque proportional to an input so that an operating output is produced at the expiration of a predetermined time dependent on the magnitude of the input after the application of the input. Included in the relay are two sets of shading coils and reluctance paths responsive to the same input signal for applying the rotation torque to the induction disc, whereby and desired time lag characteristic can be readily obtained.
Inventors
- 👤 Mitsuo Watai
- 👤 Koya Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 04:51
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/08; H02H3/093; H01; H01H; H01H53/00; H01H53/10; H01H53/12
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
149 words
In an induction disc type relay including an induction disc and means for applying a rotational torque to said disc, the improvement wherein said means for applying a rotational torque to said disc comprises: first means, responsive to an input signal, for supplying a first operating torque to rotate said disc in a first direction; and second means, responsive to said input signal to which said first means is responsive, for supplying a second operating torque to rotate said disc in a direction opposite to said first direction, wherein said first and second means each comprises a shading coil magnetic pole structure having differently spaced air gaps mounted on the single core piece, whereby, the resultant torque applied to rotate said disc results from the application of the same input signal to said first and second means, so that a desired inverse time lag characteristic can be accurately obtained.
Claim 2
Dependent Claim
149 words
In an induction disc type relay including an induction disc and means for applying a rotational torque to said disc, the improvement wherein said means for applying a rotational torque to said disc comprises: first means, responsive to an input signal, for supplying a first operating torque to rotate said disc in a first direction; and second means, responsive to said input signal to which said first means is responsive, for supplying a second operating torque to rotate said disc in a direction opposite to said first direction, wherein said first and second means each comprises a shading coil magnetic pole structure having differently spaced air gaps mounted on the single core piece, whereby, the resultant torque applied to rotate said disc results from the application of the same input signal to said first and second means, so that a desired inverse time lag characteristic can be accurately obtained.
Claim 3
Dependent Claim
36 words
An induction disc type relay according to claim 1, wherein said disc is mounted on a shaft having a bias spring provided therefor to impart a bias torque to said disc in one of said directions.
Claim 4
Dependent Claim
26 words
An induction disc type relay according to claim 2, including a singular input coil mounted on said core structure to which said input signal is applied.
Claim 5
Dependent Claim
192 words
In an induction disc type relay including an induction disc and means for applying a rotational torque to said disc, the improvement wherein said means for applying a rotational torque to said disc comprises: first means, responsive to an input signal, for supplying a first operating torque to rotate said disc in a first direction; and second means, responsive to said input signal to which said first means is responsive, for supplying a second operating torque to rotate said disc in a direction opposite to said first direction, wherein said first and second means each comprises a shading coil magnetic pole structure having differently spaced air gaps mounted on separate core pieces and including a pair of input coils mounted on said pieces and having the inputs thereof each receiving said input signal so that said input signal will be applied to each of said core pieces and, thereby, to said shading coil magnetic pole structure, whereby, the resultant torque applied to rotate said disc results from the application of the same input signal to said first and second means, so that a desired inverse time lag characteristic can be accurately obtained.
Claim 6
Dependent Claim
192 words
In an induction disc type relay including an induction disc and means for applying a rotational torque to said disc, the improvement wherein said means for applying a rotational torque to said disc comprises: first means, responsive to an input signal, for supplying a first operating torque to rotate said disc in a first direction; and second means, responsive to said input signal to which said first means is responsive, for supplying a second operating torque to rotate said disc in a direction opposite to said first direction, wherein said first and second means each comprises a shading coil magnetic pole structure having differently spaced air gaps mounted on separate core pieces and including a pair of input coils mounted on said pieces and having the inputs thereof each receiving said input signal so that said input signal will be applied to each of said core pieces and, thereby, to said shading coil magnetic pole structure, whereby, the resultant torque applied to rotate said disc results from the application of the same input signal to said first and second means, so that a desired inverse time lag characteristic can be accurately obtained.
References Cited (Backward Citations)
US2094986A
Cited
US2079492A
Cited
US2027846A
Cited
US2110686A
Cited
US2110391A
Cited
US2110417A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |