Patent US3801842A successfully refreshed from Google Patents.
US3801842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stepping motor
Assignee: NCR Voyix Corp
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Filing: 1972-06-27
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Granted: 1974-04-02
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Expires: 1992-06-27
Abstract
Abstract A stepping motor includes a single piece rotor with shafts connected thereto on each end of the rotor, and a pair of coils circumventing the rotor and encased within stators, which stators are positioned adjacent the rotor and spaced from each other. The energization and de-energization of the respective coils provides for one complete step of operation by the pulsing of one coil under stated conditions.
Inventors
- 👤 W Touchman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:31
CPC Classifications
H; H02; H02K; H02K37/00; H02K37/02; H02K37/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
202 words
A stepping motor comprising a housing, a sleeve within the housing, a single rotor journaled in said housing, a pair of spaced stator assemblies and a pair of electromagnetic coils operably associated therewith and encircling the rotor, each of said stator assemblies substantially encompassing its respective electro-magnetic coil for providing a path of flux therefrom through laminations of the respective stator assembly to a portion of the rotor and through said sleeve to complete said path, a spacer encircling said rotor and separating said stator assemblies for permitting energization and deenergization of one of said coils in successive manner, means including a toothed wheel secured to said rotor for determining energization of a respective coil, key and slot means in said housing and said laminations for preventing rotation of said laminations with respect to said housing upon energization of said electromagnetic coils whereby with both coils in the energized condition, deenergization of said respective coil permits rotation of said rotor a predetermined angular distance, said other coil effecting additional angular rotation of said rotor, and energization of said respective coil effecting completion of one step of operation, and means connecting said spacer and said housing for retaining said key means in position.
Claim 2
Dependent Claim
202 words
A stepping motor comprising a housing, a sleeve within the housing, a single rotor journaled in said housing, a pair of spaced stator assemblies and a pair of electromagnetic coils operably associated therewith and encircling the rotor, each of said stator assemblies substantially encompassing its respective electro-magnetic coil for providing a path of flux therefrom through laminations of the respective stator assembly to a portion of the rotor and through said sleeve to complete said path, a spacer encircling said rotor and separating said stator assemblies for permitting energization and deenergization of one of said coils in successive manner, means including a toothed wheel secured to said rotor for determining energization of a respective coil, key and slot means in said housing and said laminations for preventing rotation of said laminations with respect to said housing upon energization of said electromagnetic coils whereby with both coils in the energized condition, deenergization of said respective coil permits rotation of said rotor a predetermined angular distance, said other coil effecting additional angular rotation of said rotor, and energization of said respective coil effecting completion of one step of operation, and means connecting said spacer and said housing for retaining said key means in position.
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |