US5486944A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Scanner module for symbol scanning system
Assignee: Symbol Technologies LLC
•
Filing: 1994-09-06
•
Granted: 1996-01-23
•
Expires: 2014-09-06
Abstract
Abstract An optical scanner module for directing a light beam to scan an optically encoded symbol includes an optical element mounted for oscillatory motion to scan the light beam in one direction by a flex element capable of torsional flexure. This oscillatory motion is induced by the interacting magnetic fields established by a permanent magnet mounted to the flex element and an electromagnetic coil driven by an AC current. Bidirectional light beam scanning is achieved by mounting an assembly of the flex element, optical element and permanent magnet to one or more additional flex elements for oscillatory motion to scan the light beam in a second direction. This oscillatory motion is induced by the inclusion of an additional permanent magnet and/or electromagnetic coil.
Inventors
- 👤 Simon Bard
- 👤 Askold Strat
- 👤 Paul Dvorkis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:45
CPC Classifications
G; G06; G06K; G06K7/00; G06K7/10; G06K7/10544; G06K7/10821; G06K7/1098; G06F; G06F1/00; G06F1/16; G06F1/1613; G06F1/163; G06F3/00; G06F3/01; G06F3/03; G06F3/033; G06F3/0346; G06K7/10554; G06K7/10564; G06K7/10584; G06K7/10594; G06K7/10603; G06K7/10633; G06K7/10643; G06K7/10653; G06K7/10673; G06K7/10683; G06K7/10693; G06K7/10792; G06K7/10801; G06K7/10811; G06K7/10851; G06K7/10861; G06K7/10871; G06K7/10881; G06K7/10891; G06K7/109; G06F2203/00; G06F2203/033; G06F2203/0331; G06K2007/10524; G06K2007/10534; G06K2207/00; G06K2207/1011; G06K2207/1016; G06K2207/1018
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
214 words
An optical scanner module for directing a light beam in a pattern to scan an encoded symbol, the scanner module comprising, in combination: an optical element for directing the light beam; a first permanent magnet for establishing a first magnetic field having a first magnetic axis; a first elongated flex element, having opposed ends, for mounting said optical element and said first permanent magnet in back-to-back relation at a location intermediate said opposed ends; means for mounting said opposed ends of said first flex element; a second permanent magnet mounted by said mounting means and establishing a second magnetic field having a second magnetic axis; a second elongated flex element, having fixedly mounted opposed ends, for mounting said mounting means at a location intermediate said opposed ends; and electromagnetic coil means for receiving an AC drive current to establish a third magnetic field having a third magnetic axis oriented in orthogonal relation to said first and second magnetic axes, whereby interaction of the first, second and third magnetic fields generates oscillatory motions of said optical element in a first direction about a first axis defined by said first flex element and in a second direction about a second axis defined by said second flex element to produce bidirectional scanning movement of the light beam.
Claim 2
Dependent Claim
214 words
An optical scanner module for directing a light beam in a pattern to scan an encoded symbol, the scanner module comprising, in combination: an optical element for directing the light beam; a first permanent magnet for establishing a first magnetic field having a first magnetic axis; a first elongated flex element, having opposed ends, for mounting said optical element and said first permanent magnet in back-to-back relation at a location intermediate said opposed ends; means for mounting said opposed ends of said first flex element; a second permanent magnet mounted by said mounting means and establishing a second magnetic field having a second magnetic axis; a second elongated flex element, having fixedly mounted opposed ends, for mounting said mounting means at a location intermediate said opposed ends; and electromagnetic coil means for receiving an AC drive current to establish a third magnetic field having a third magnetic axis oriented in orthogonal relation to said first and second magnetic axes, whereby interaction of the first, second and third magnetic fields generates oscillatory motions of said optical element in a first direction about a first axis defined by said first flex element and in a second direction about a second axis defined by said second flex element to produce bidirectional scanning movement of the light beam.
Claim 3
Dependent Claim
86 words
The optical scanner defined in claim 1, wherein the electromagnetic means includes first and second electromagnetic coils, said first electromagnetic coil receiving a first AC drive current to establish one third magnetic field for interaction with the first magnetic field to produce oscillatory motion of said optical element in the first direction and said second coil receiving second AC drive current to establish another third magnetic field for interaction with the second magnetic field to produce oscillatory motion of said optical element in the second direction.
Claim 4
Dependent Claim
36 words
The optical scanner module defined in claim 2, wherein said mounting means is in the form of a cylinder mounted by said second flex element within a central open of said first and second electromagnetic coils.
Claim 5
Dependent Claim
33 words
The optical scanner module defined in claim 3, wherein said opposed ends of said second flex elements are fixedly mounted to annular bobbins on which said first and second electromagnetic coils are wound.
References Cited (Backward Citations)
US1873696A
Cited
US2863064A
Cited
US3011124A
Cited
US3360659A
Cited
GB1120720A
Cited
US3610891A
Cited
US3583792A
Cited
US3800084A
Cited
US3860794A
Cited
US4006343A
Cited
US3931524A
Cited
US3978317A
Cited
US3978318A
Cited
US3925639A
Cited
US4311384A
Cited
US4019026A
Cited
US4104514A
Cited
US4072859A
Cited
US4354101A
Cited
US4093865A
Cited
US4113343A
Cited
US4125765A
Cited
US4253724A
Cited
US4160156A
Cited
US4251798A
Cited
US4360798A
Cited
JPS56114136A
Cited
US4387297B1
Cited
US4387297A
Cited
US4593186A
Cited
US4369361A
Cited
US4355301A
Cited
US4418277A
Cited
US4333006A
Cited
US4418276A
Cited
EP0067414A2
Cited
US4485350A
Cited
US4570057A
Cited
US4673805A
Cited
US4460120A
Cited
US4758717A
Cited
US4845350A
Cited
US4736095A
Cited
US4845350B1
Cited
US4409470A
Cited
US4538895A
Cited
US4560862A
Cited
EP0137966A2
Cited
US4575625A
Cited
US4578571A
Cited
US4655541A
Cited
US4521678A
Cited
US4678288A
Cited
US4766300A
Cited
US4639606A
Cited
US4760248A
Cited
US4816660A
Cited
US4897532A
Cited
US5021641A
Cited
US4816660B1
Cited
US4732440A
Cited
US4694182A
Cited
US4782220A
Cited
US4794239A
Cited
US4896026A
Cited
US5015831A
Cited
US5276545A
Cited
SU1674047A1
Cited
JPH03107116A
Cited
US5168149A
Cited
JPH04211217A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-01-22 | 1999-07-24 | 2000-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-01-22 | 2003-07-24 | 2004-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-01-22 | 2007-07-24 | 2008-01-23 | $7700.00 | Window Closed / Lapsed |