US3603161A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gyroscope with collectorless dc motor
Assignee: Bodenseewerk Geratetechnik GmbH
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Filing: 1969-09-04
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Granted: 1971-09-07
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Expires: 1989-09-04
Abstract
Abstract The direct current gyromotor comprises a frame, a rotor rotatably mounted on the frame and a pair of relatively flat stator windings without cores. The rotor has a pair of spaced permanent magnets in cylindrical form and magnetized so that they each have pairs of north and south magnetic poles about their periphery. The two magnets are spaced from each other and positioned so that a north pole of one magnet is opposite a south pole of the other magnet. The stator coils are in the annular space between the magnets. The position of rotation of the rotor is detected by a phototransistor which reads a sequential series of light and dark areas on the rotor. The phototransistor is a part of a flip-flop which controls the conduction of four transistors in a bridge. The stator windings are connected across one diagonal of the bridge with the DC supply being connected across the other diagonal.
Inventors
- 👤 Karlhans Schwarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:46
CPC Classifications
H; H02; H02K; H02K29/00; H02K29/06; H02K29/10; G; G01; G01C; G01C19/00; G01C19/02; G01C19/04; G01C19/06; G01C19/065; Y; Y10; Y10T; Y10T74/00; Y10T74/12; Y10T74/1261; Y10T74/1264; Y10T74/1282
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
184 words
In a gyro having an electric motor adapted to be connected to a source of direct current, the improvement wherein said motor comprises: a frame; a rotor mounted in said frame for rotation about an axis, said rotor comprising a pair of ring permanent magnets of endwise lateral polarity, said magnets being concentric with said axis and spaced a short distance from each other with a relatively narrow slot therebetween, said magnets being positioned so that a north magnetic pole of one magnet faces a south magnetic pole of the other magnet and vice versa; stator winding means attached to said frame and positioned in the slot between said magnets, said stator means being relatively flat in the direction parallel to said axis, said means comprising electrical windings without a high permeability core so that it weighs not substantially more than the windings; and commutating means connected to said stator winding means and having source supply connections adapted to be connected to said source to energize said windings to produce a reversing magnetic field across said stator winding means and between said permanent magnets.
Claim 2
Dependent Claim
184 words
In a gyro having an electric motor adapted to be connected to a source of direct current, the improvement wherein said motor comprises: a frame; a rotor mounted in said frame for rotation about an axis, said rotor comprising a pair of ring permanent magnets of endwise lateral polarity, said magnets being concentric with said axis and spaced a short distance from each other with a relatively narrow slot therebetween, said magnets being positioned so that a north magnetic pole of one magnet faces a south magnetic pole of the other magnet and vice versa; stator winding means attached to said frame and positioned in the slot between said magnets, said stator means being relatively flat in the direction parallel to said axis, said means comprising electrical windings without a high permeability core so that it weighs not substantially more than the windings; and commutating means connected to said stator winding means and having source supply connections adapted to be connected to said source to energize said windings to produce a reversing magnetic field across said stator winding means and between said permanent magnets.
Claim 3
Dependent Claim
130 words
In a gyro as set forth in claim 1, wherein said commutating means comprises: alternating light and dark areas on a portion of said rotor; electronic switching means connected to said stator winding means for changing the direction of flow of the direct current through said winding means; and a photoelectric-sensing device mounted on said frame and located at a position adjacent said portion of the rotor for determining whether a light or dark area of the rotor is adjacent said position, said device being connected to said switching means for causing the direct current flow to be in one direction through the winding means when a dark area is adjacent said position and causing the flow to be in opposite direction when a light area is adjacent said position.
Claim 4
Dependent Claim
143 words
In a gyro as set forth in claim 2, wherein, said electronic switching means comprises four transistors connected so that each transistor forms a leg of a direct current bridge having two pairs of opposite corners, said source supply connections being connected to one of said pair of corners, said stator winding means being connected to the other of said pair of corners, each of said transistors having a control element; and said sensing device comprises a bistable flip-flop having two branches, a phototransistor forming one of said branches, and means connecting said flip-flop to said control elements for establishing current flow from said source in one direction or the other through said bridge and stator winding means depending upon whether or not light is detected by said phototransistor, said phototransistor being located at said position to view said portion of said rotor.
Claim 5
Dependent Claim
18 words
In a gyro as set forth in claim 3, wherein said switching means is mounted on said frame.
Claim 6
Dependent Claim
18 words
In a gyro as set forth in claim 2, wherein said switching means is mounted on said frame.
Claim 7
Dependent Claim
179 words
In a gyro for connection to a source of direct current and comprising a direct current electric motor including a frame, a rotor and stator winding means mounted on the frame, and commutating means connected to said stator winding means, the improvement wherein said commutating means comprises: alternating light and dark areas on a portion of said rotor; electronic-switching means connected to said stator winding means and having connections adapted to be connected to said source for energizing said stator winding means and for changing the direction of flow of the direct current through said winding means; and a photoelectric-sensing device mounted on said frame and located at a position adjacent said portion of the rotor for determining whether a light or dark area of the rotor is adjacent said position, said device being connected to said switching means for causing the direct current flow to be in one direction through the winding means when a dark area is adjacent said position and causing the flow to be in opposite direction when a light area is adjacent said position.
Claim 8
Dependent Claim
179 words
In a gyro for connection to a source of direct current and comprising a direct current electric motor including a frame, a rotor and stator winding means mounted on the frame, and commutating means connected to said stator winding means, the improvement wherein said commutating means comprises: alternating light and dark areas on a portion of said rotor; electronic-switching means connected to said stator winding means and having connections adapted to be connected to said source for energizing said stator winding means and for changing the direction of flow of the direct current through said winding means; and a photoelectric-sensing device mounted on said frame and located at a position adjacent said portion of the rotor for determining whether a light or dark area of the rotor is adjacent said position, said device being connected to said switching means for causing the direct current flow to be in one direction through the winding means when a dark area is adjacent said position and causing the flow to be in opposite direction when a light area is adjacent said position.
Claim 9
Dependent Claim
143 words
In a gyro as set forth in claim 6, wherein, said electronic switching means comprises four transistors connected so that each transistor forms a leg of a direct current bridge having two pairs of opposite corners, said source supply connections being connected to one of said pair of corners, said stator winding means being connected to the other of said pair of corners, each of said transistors having a control element; and said sensing device comprises a bistable flip-flop having two branches, a phototransistor forming one of said branches, and means connecting said flip-flop to said control elements for establishing current flow from said source in one direction or the other through said bridge and stator winding means depending upon whether or not light is detected by said phototransistor, said phototransistor beinG located at said position to view said portion of said rotor.
Claim 10
Dependent Claim
18 words
In a gyro as set forth in claim 7, wherein said switching means is mounted on said frame.
Claim 11
Dependent Claim
17 words
In gyro as set forth in claim 6, wherein said switching means is mounted on said frame.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |