US3777236A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reciprocating motor
Assignee: Czech Academy of Sciences
•
Filing: 1972-10-25
•
Granted: 1973-12-04
•
Expires: 1992-10-25
Abstract
Abstract A motion electromagnet is provided having a main magnetic circuit with an exciting coil. An auxiliary magnetic circuit under the influence of the magnetic flux of the main magnetic circuit has a movable and a stationary part with movable and stationary windings respectively therein which are off-set with a constant air gap maintained between the stationary and movable parts. Energizing the exciting coil of the main magnetic circuit moves the movable parts of the auxiliary magnetic circuit into alignment with the stationary part. By symmetrically duplicating the main and auxiliary magnetic circuits, and alternately activating the main magnetic circuits via their respective exciting coils by a switching device, an oscillating movement in the electromagnet is produced.
Inventors
- 👤 J Hrubes
- 👤 A Dubansky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:28
CPC Classifications
H; H02; H02K; H02K33/00; H02K33/12; H01; H01F; H01F7/00; H01F7/06; H01F7/08; H01F7/13
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
153 words
A motion electromagnet having a constant air gap and an increased initial pull force comprising a. a main magnetic circuit having an exciting coil for generating a magnetic flux in said main magnetic circuit; b. a source of potential; c. switch means coupled betweeN said source of potential and said exciting coil for selectively actuating said exciting coil; d. first and second short-circuited, mutually coaxial secondary turns magnetically coupled to said main magnetic circuit, said first secondary turns being stationary and said second secondary turns being mobile with respect to said first secondary turns in a direction of their common axis; e. an auxiliary magnetic circuit encompassing both said first and secondary turns having a stationary part encompassing a part of said first secondary turns and a mobile part encompassing a part of said secondary turns; and f. a constant air gap separating said stationary and mobile part of said auxiliary magnetic circuit.
Claim 2
Dependent Claim
153 words
A motion electromagnet having a constant air gap and an increased initial pull force comprising a. a main magnetic circuit having an exciting coil for generating a magnetic flux in said main magnetic circuit; b. a source of potential; c. switch means coupled betweeN said source of potential and said exciting coil for selectively actuating said exciting coil; d. first and second short-circuited, mutually coaxial secondary turns magnetically coupled to said main magnetic circuit, said first secondary turns being stationary and said second secondary turns being mobile with respect to said first secondary turns in a direction of their common axis; e. an auxiliary magnetic circuit encompassing both said first and secondary turns having a stationary part encompassing a part of said first secondary turns and a mobile part encompassing a part of said secondary turns; and f. a constant air gap separating said stationary and mobile part of said auxiliary magnetic circuit.
Claim 3
Dependent Claim
24 words
The motion electromagnet as set forth in claim 1, having auxiliary turns embedded in surfaces creating the air gap of the auxiliary magnetic circuit.
Claim 4
Dependent Claim
32 words
The motion electromagnet as set forth in claim 1, wherein the relative movement of stationary and mobile parts of said auxiliary magnetic circuit and said first and second secondary turns is linear.
Claim 5
Dependent Claim
83 words
The motion electromagnet as set forth in claim 1 comprising two mutually electrically and magnetically independent main magnetic circuits each having an exciting coil, said switching means alternatively connecting said exciting coils of said two main magnetic circuits to said source of potential at a predetermined rate, a pair of said auxiliary magnetic circuits, adjustable means coupling the mobile parts of said two auxiliary magnetic circuits for adjusting their off-set positions with respect to the corresponding stationary parts of said auxiliary magnetic circuits.
Claim 6
Dependent Claim
19 words
The motion electromagnet as set forth in claim 4, including means for adjusting the speed of said switch means.
References Cited (Backward Citations)
US824953A
Cited
US2003647A
Cited
US2690128A
Cited
US3161793A
Cited
US3130334A
Cited
US3453463A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |