US3585471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multifrequency, multivoltage stator circuits for alternating current motors
Assignee: Olivetti SpA
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Filing: 1969-06-03
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Granted: 1971-06-15
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Expires: 1989-06-03
Abstract
Abstract A stator circuit of an alternating current motor is provided with at least an additional winding which is serially connected with the main stator winding when the motor is to be operated by a voltage at a predetermined frequency, and which may be bypassed through a manual switch as an additional inductance when the motor is to be operated by a voltage at a frequency higher than the predetermined frequency. The main winding is formed of two equal parts which can be connected either serially or in parallel to enable the motor to be operated at two different voltage levels.
Inventors
- 👤 Edoardo Ecclesia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:57
CPC Classifications
H; H02; H02K; H02K17/00; H02K17/02; H02K17/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
103 words
A stator circuit for an alternating cUrrent motor, comprising: first winding means having a predetermined impedance at a first predetermined frequency, second winding means adapted to be connected to said first winding means so that the impedance of the connected combination of said first and second winding means is substantially equal to said predetermined impedance at a second predetermined frequency relatively lower than said first frequency, and, switch means for connecting said first winding to the stator input voltage in a first position and to said second winding means in a second position, said second winding means being connected to the input voltage.
Claim 2
Dependent Claim
103 words
A stator circuit for an alternating cUrrent motor, comprising: first winding means having a predetermined impedance at a first predetermined frequency, second winding means adapted to be connected to said first winding means so that the impedance of the connected combination of said first and second winding means is substantially equal to said predetermined impedance at a second predetermined frequency relatively lower than said first frequency, and, switch means for connecting said first winding to the stator input voltage in a first position and to said second winding means in a second position, said second winding means being connected to the input voltage.
Claim 3
Dependent Claim
61 words
The stator circuit defined in claim 1 wherein said first winding means comprises two winding parts and further comprising: voltage selecting switch means positionable to a first position for connecting said winding parts in series or to a second position for connecting said winding parts in parallel, whereby the motor may be coupled to either of two values of input voltage.
Claim 4
Dependent Claim
19 words
The stator circuit defined in claim 1 wherein said second winding means comprises two winding parts connected in parallel.
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) | 1974-06-14 | 1974-12-14 | 1975-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-14 | 1978-12-14 | 1979-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-14 | 1982-12-14 | 1983-06-15 | $7700.00 | Window Closed / Lapsed |