US3596593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic setting means and hammer actuating means in print wheel arrangements
Assignee: KDDI Corp
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Filing: 1968-06-05
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Granted: 1971-08-03
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Expires: 1988-06-05
Abstract
Abstract A printer for selecting automatically types of numerals and/or characters in response to input signals and for printing the selected types of numerals and characters on a printing paper, in which a plurality of type wheels are arranged rotatably on a shaft at regular intervals. Each of the type wheels has an even number of permanent magnets radially arranged from the center of the type wheel at regular intervals in the alternating arrangement of magnetic polarities of the permanent magnets. Type characters are fixed along the periphery of each type wheel at respective projections each arranged between adjacent two of the permanent magnets. One of the types is selected by rotating each type wheel in the clockwise or counterclockwise direction by driving alternately a pair of electromagnets arranged oppositely to one of the types and the pole of one of the permanent magnets respectively until the selected type opposes a print hammer.
Inventors
- 👤 Tasaku Wada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:20
CPC Classifications
B; B41; B41J; B41J9/00; B41J9/02; B41J9/10; B41J9/12; B41J7/00; B41J7/48
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
210 words
A printer comprising a shaft; a first plurality of type wheels rotatably mounted on said shaft, each said type wheel having a first plurality of permanent magnets mounted thereon and arranged in a circle about the wheel axis, and a plurality of type characters fixed along the periphery of the type wheel; a plurality of electromagnets mounted on said printer and disposed adjacent said type wheels, and driving circuit means connected to said electromagnets for energizing said electromagnets; input means electrically coupled to said driving circuit means for generating pulses for energizing said electromagnets; selector means electrically coupled to said input means to distribute successively the pulses to the driving circuit means to create a magnetic force between selected electromagnets and adjacent permanent magnets on said type wheels to rotate said wheels on said shaft to present selected type in a printing position; type hammer means mounted adjacent said type wheels for radial movement with respect to said type wheels; and means for selectively moving said type hammer means toward said type wheEls at said printing position for operation to print a printing paper with said type characters, wherein said type characters on said wheels are successively selected by rotation of said wheels and opposed to said type hammer means.
Claim 2
Dependent Claim
210 words
A printer comprising a shaft; a first plurality of type wheels rotatably mounted on said shaft, each said type wheel having a first plurality of permanent magnets mounted thereon and arranged in a circle about the wheel axis, and a plurality of type characters fixed along the periphery of the type wheel; a plurality of electromagnets mounted on said printer and disposed adjacent said type wheels, and driving circuit means connected to said electromagnets for energizing said electromagnets; input means electrically coupled to said driving circuit means for generating pulses for energizing said electromagnets; selector means electrically coupled to said input means to distribute successively the pulses to the driving circuit means to create a magnetic force between selected electromagnets and adjacent permanent magnets on said type wheels to rotate said wheels on said shaft to present selected type in a printing position; type hammer means mounted adjacent said type wheels for radial movement with respect to said type wheels; and means for selectively moving said type hammer means toward said type wheEls at said printing position for operation to print a printing paper with said type characters, wherein said type characters on said wheels are successively selected by rotation of said wheels and opposed to said type hammer means.
Claim 3
Dependent Claim
91 words
A printer according to claim 1, further comprising a second plurality of permanent magnets including position determining magnets mounted one each on each of said type wheels, a plurality of detection coils fixedly mounted adjacent said type wheels, one for each said position determining magnet, and sensing means connected to said detection coils for detecting changes of magnetic flux due to movement of said position determining magnets with said type wheels, whereby the revolution direction of each type wheel, and a starting position thereof, can be detected by said sensing means.
Claim 4
Dependent Claim
29 words
A printer according to claim 2, in which the driving circuit means include means for driving the respective type wheels to restore said type wheels to their starting positions.
Claim 5
Dependent Claim
85 words
A printer according to claim 1, in which one of said wheels has a blank printing character at a starting position of said one wheel, and in which the printer is further provided with spacing means comprising means connected to said driving circuits for temporarily preventing operation of one of said driving circuits in order to maintain said one wheel at its said starting position to leave one spacing on the printing paper during said operation of said means for moving said type hammer means.
Claim 6
Dependent Claim
122 words
The invention as set forth in claim 1, in which each said wheel has radially extending spaced projections about its periphery, said type characters being mounted on said projections, and in which said permanent magnets on each wheel are disposed respectively between said spaced projections with their poles arranged radially of the wheel with alternating polarities, each said wheel has a pair of said electromagnets mounted adjacent thereto, one electromagnet of each said pair being disposed adjacent one of said projections when the other electromagnet is disposed adjacent one of said permanent magnets, and comprising means including said driving circuits for alternately energizing first one of said electromagnets in each of said pairs and then the other to drive said type wheels.
Claim 7
Dependent Claim
81 words
A printer according to claim 5, in which said driving circuit means comprise a plurality of bistable circuit means, one said bistable circuit means for each said pair of electromagnets, for being triggered to determine the order of alternate energizations for each said pair of electromagnets in accordance with the state of said bistable circuit means, whereby each of the type wheels can be rotated in the clockwise and counterclockwise directions in accordance with the state of the bistable circuit means.
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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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |