US4828347A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscillating linear deflection device
Assignee: Individual
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Filing: 1987-04-13
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Granted: 1989-05-09
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Expires: 2007-04-13
Abstract
Abstract A drive with a D.C. motor is provided for the oscillating deflection of a mirror for the line by line scanning of pictures. It is supplied with alternating current so that the rotor executes a harmonic oscillation. To fix the zero position or the oscillation mean position, a magnet with an outwardly oriented magnetic pole is fixed to the mirror carrier. Another magnet is fixedly disposed on the housing thus that a reciprocal pole to the pole on the mirror carrier is opposite to it. Thus it is not necessary to overcome a force increasing proportionally to the deflection which also would interfere with the oscillation, as in the known zero position by means of a torsion bar.
Inventors
- 👤 Heinz Keiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:16
CPC Classifications
G; G02; G02B; G02B26/00; G02B26/08; G02B26/10; H; H02; H02K; H02K33/00; H02K33/18
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
110 words
An oscillating linear deflection device for a laser beam in which a beam deviation element is moved by means of an oscillating electromechanical drive comprising an electromagnetic drive with a housing including a drive shaft; and a carrier mounted for movement with said drive shaft; a magnetic system for the fixing of a zero position including a first magnet fixed in place, and a second magnet fastened to said carrier, said first magnet having a polarity different from the polarity of said second magnet, a mirror supported with said second magnet by said carrier; and mechanical stops fixedly disposed on said housing to limit the pivot angle of said carrier.
Claim 2
Dependent Claim
110 words
An oscillating linear deflection device for a laser beam in which a beam deviation element is moved by means of an oscillating electromechanical drive comprising an electromagnetic drive with a housing including a drive shaft; and a carrier mounted for movement with said drive shaft; a magnetic system for the fixing of a zero position including a first magnet fixed in place, and a second magnet fastened to said carrier, said first magnet having a polarity different from the polarity of said second magnet, a mirror supported with said second magnet by said carrier; and mechanical stops fixedly disposed on said housing to limit the pivot angle of said carrier.
Claim 3
Dependent Claim
36 words
The oscillating linear deflection device of claim 1 wherein said electromagnetic drive is a D.C. motor supplied with alternating current; said motor being located in said housing and having a rotor attached to said drive shaft.
Claim 4
Dependent Claim
17 words
The oscillating linear deflection device of claim 1 wherein said first and second magnets are permanent magnets.
Claim 5
Dependent Claim
124 words
An oscillating linear deflection device for a laser beam in which a beam deviation element is moved by means of an oscillating electromechanical drive comprising an electromagnetic drive with a housing including a drive shaft, said electromagnetic drive being a D.C. motor supplied with alternating current, said motor being located in said housing and having a rotor attached to said drive shaft, and a carrier mounted for movement with said drive shaft; a magnetic system for the fixing of a zero position including a first magnet fixed in place, and a second magnet fastened to said carrier, said first magnet having a polarity different from the polarity of said second magnet; a beam deviation element supported along with said second magnet by said carrier.
Claim 6
Dependent Claim
124 words
An oscillating linear deflection device for a laser beam in which a beam deviation element is moved by means of an oscillating electromechanical drive comprising an electromagnetic drive with a housing including a drive shaft, said electromagnetic drive being a D.C. motor supplied with alternating current, said motor being located in said housing and having a rotor attached to said drive shaft, and a carrier mounted for movement with said drive shaft; a magnetic system for the fixing of a zero position including a first magnet fixed in place, and a second magnet fastened to said carrier, said first magnet having a polarity different from the polarity of said second magnet; a beam deviation element supported along with said second magnet by said carrier.
Claim 7
Dependent Claim
17 words
The oscillating linear deflection device of claim 4 wherein said first and second magnets are permanent magnets.
Claim 8
Dependent Claim
29 words
The oscillating linear deflection device of claim 4 wherein a third magnet is fixedly fastened to said housing; said third magnet having the same polarity as said second magnet.
Claim 9
Dependent Claim
42 words
The oscillating linear deflection device of claim 6 wherein a fourth magnet is disposed orthogonal to a zero position of said carrier having a polarity opposite to the polarity of said third magnet to create a repulsive force to said third magnet.
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) | 1992-05-08 | 1992-11-07 | 1993-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-08 | 1996-11-07 | 1997-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-08 | 2000-11-07 | 2001-05-09 | $7700.00 | Window Closed / Lapsed |