US3745433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary & linear magnetomotive positioning mechanism
Assignee: AT&T Teletype Corp
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Filing: 1971-02-02
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Granted: 1973-07-10
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Expires: 1991-02-02
Abstract
Abstract A positioning mechanism for moving a cylinder axially and rotationally is adapted for a printer which has a cylindrical type carrier on which the dies are arranged in intersecting rows and columns. A first electrically conductive coil is coaxial with and mounted on one end portion of the cylinder. A second electrically conductive coil has an axis perpendicular to the axis of and is mounted on the other end portion of the cylinder. A pair of permanent magnets are positioned about opposite end portions of the cylinder such that each coil is disposed for magnetic coupling in the magnetic flux field of a corresponding magnet. By selectively energizing the coils, magnetic effects are produced thereabout for coaction with the permanent magnetic flux fields simultaneously to drive the cylinder axially of and angularly about its axis. A feed back system for sensing the instantaneous longitudinal and angular positions of the cylinder is adapted simultaneously to provide electrical effects, whereby from any axial and angular conditions the cylinder can be driven to any other selected axial and angular conditions.
Inventors
- 👤 E Kelby
- 👤 A Wallskog
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:30
CPC Classifications
B; B41; B41J; B41J7/00; B41J7/48; H; H01; H01F; H01F7/00; H01F7/06; H01F7/066; H01F7/08; H01F7/14; H01F7/145; H02; H02K; H02K26/00; H02K37/00; H02K37/10; H02K41/00; H02K41/02; H02K41/035; H02K41/0352; H02K41/0354; H02K41/0356; H02K41/0358; H02K16/00; H02K2201/00; H02K2201/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
273 words
A mechanism for shifting to a station any one of an array of elements supported on a cylinder mounted for movement in intersecting first and second dimensions, each element having an address defined by intersecting coordinates related to said dimensions, and comprising: first means for magnetomotively moving said cylinder to any selected position longitudinally of said first dimension in the absence of a force for moving said cylinder longitudinally of said second dimension; second means for magnetomotively moving said cylinder to any selected position longitudinally of said second dimension in the absence of a force for movinG said cylinder longitudinally of said first dimension; third means for simultaneously generating a pair of first signals representative of the coordinates of any selected address of said cylinder; a linear potentiometer for generating one of a pair of second signals; a rotary potentiometer for generating the other of said pair of second signals; fourth means movable linearly and rotationally in response to corresponding movement of said cylinder for changing said pair of second signals so that said pair of second signals is representative of the coordinates of the actual position of said cylinder; fifth means for developing a first output from one of the signals of each of said pairs of first and second signals; sixth means for developing a second output from the other of the signals of each of said pairs of first and second signals; and seventh means for simultaneously imposing said outputs on said first and second means and moving said cylinder in a third dimension resulting from the forces tending to move said cylinder longitudinally of said first and second dimensions.
Claim 2
Dependent Claim
273 words
A mechanism for shifting to a station any one of an array of elements supported on a cylinder mounted for movement in intersecting first and second dimensions, each element having an address defined by intersecting coordinates related to said dimensions, and comprising: first means for magnetomotively moving said cylinder to any selected position longitudinally of said first dimension in the absence of a force for moving said cylinder longitudinally of said second dimension; second means for magnetomotively moving said cylinder to any selected position longitudinally of said second dimension in the absence of a force for movinG said cylinder longitudinally of said first dimension; third means for simultaneously generating a pair of first signals representative of the coordinates of any selected address of said cylinder; a linear potentiometer for generating one of a pair of second signals; a rotary potentiometer for generating the other of said pair of second signals; fourth means movable linearly and rotationally in response to corresponding movement of said cylinder for changing said pair of second signals so that said pair of second signals is representative of the coordinates of the actual position of said cylinder; fifth means for developing a first output from one of the signals of each of said pairs of first and second signals; sixth means for developing a second output from the other of the signals of each of said pairs of first and second signals; and seventh means for simultaneously imposing said outputs on said first and second means and moving said cylinder in a third dimension resulting from the forces tending to move said cylinder longitudinally of said first and second dimensions.
Claim 3
Dependent Claim
144 words
A mechanism for positioning a cylinder to align any position on the surface thereof with a reference station and comprising: a first conductive coil mounted coaxially on one end portion of said cylinder; a second conductive coil mounted on the other end portion of said cylinder in an arcuate plane, said second coil wound about an axis perpendicular to the axis of said cylinder; and a pair of magnetic flux fields disposed about said cylinder ends and cut by said coils for (a) moving said cylinder when said coils are selectively energized either in a circular path to any selected position angularly about the cylinder axis or a linear dimension to any selected position longitudinally of said axis and (b) moving said cylinder in a vector course when said coils are simultaneously energized, said vector course including movement longitudinally and angularly about said axis.
Claim 4
Dependent Claim
144 words
A mechanism for positioning a cylinder to align any position on the surface thereof with a reference station and comprising: a first conductive coil mounted coaxially on one end portion of said cylinder; a second conductive coil mounted on the other end portion of said cylinder in an arcuate plane, said second coil wound about an axis perpendicular to the axis of said cylinder; and a pair of magnetic flux fields disposed about said cylinder ends and cut by said coils for (a) moving said cylinder when said coils are selectively energized either in a circular path to any selected position angularly about the cylinder axis or a linear dimension to any selected position longitudinally of said axis and (b) moving said cylinder in a vector course when said coils are simultaneously energized, said vector course including movement longitudinally and angularly about said axis.
Claim 5
Dependent Claim
124 words
A combination according to claim 2 further having: means for generating a pair of first signals corresponding to the angular and linear coordinates of an address of any selected position on said cylinder; means for simultaneously and independently generating a pair of second signals corresponding to the angular and linear coordinates of the address of an actual position on said cylinder; and means for generating a pair of combined outputs from (a) the signals corresponding to the linear coordinates and (b) the signals corresponding to the angular coordinates, and for imposing each output on one of said coils to move said cylinder from an actual position to an address longitudinally of and angularly about said axis and having any desired angular and lineal coordinates.
Claim 6
Dependent Claim
52 words
A combination according to claim 1 wherein said fourth means comprises: a rod secured to said cylinder and mounted for reciprocation in a path parallel to the axis of said cylinder; and means having parts on said rod and said cylinder for rotating said rod in response to rotation of said cylinder.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-09 | 1977-01-08 | 1977-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-09 | 1981-01-08 | 1981-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-09 | 1985-01-08 | 1985-07-10 | $7700.00 | Window Closed / Lapsed |