US3641584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Incremental recorder with common control of drive and recorder
Assignee: Individual
•
Filing: 1969-08-04
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Granted: 1972-02-08
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Expires: 1989-08-04
Abstract
Abstract Apparatus for recording a series of data bits on a record track, and including a motor preferably operable by alternating current to advance the record track one step for each half cycle of the alternating current in either direction, and a recording head structure for recording data bits on the track during one of the half cycles of the alternating current but not during the reverse half cycle.
Inventors
- 👤 Wendell S Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:18
CPC Classifications
H; H02; H02K; H02K33/00; H02K33/02; H02K33/04; H02K33/06; G; G11; G11B; G11B15/00; G11B15/18; G11B15/20; G11B20/00; G11B20/10; G11B20/14; G11B20/1488; G11B20/1492; H02K7/00; H02K7/06; H02K7/065
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
99 words
Apparatus comprising recording head means for recording a series of data bits successively on a record track, means for advancing said track progressively past said head means and including a motor driven by alternating current and operable to advance the track through a first step on each positive half cycle of the alternating current and through a second step on each negative half cycle of the alternating current, and means for actuating said head means to record data bits on the track on one of said half cycles of the alternating current but not on the other half cycle.
Claim 2
Dependent Claim
99 words
Apparatus comprising recording head means for recording a series of data bits successively on a record track, means for advancing said track progressively past said head means and including a motor driven by alternating current and operable to advance the track through a first step on each positive half cycle of the alternating current and through a second step on each negative half cycle of the alternating current, and means for actuating said head means to record data bits on the track on one of said half cycles of the alternating current but not on the other half cycle.
Claim 3
Dependent Claim
65 words
Apparatus as recited in claim 1, in which said last-mentioned means include rectifier means for passing to said recording head means only said one half cycle of said alternating current and not said other half cycle, and additional regulating means for passing or not passing said one half cycle to said recording head means in accordance with input data signals supplied to said additional means.
Claim 4
Dependent Claim
62 words
Apparatus as recited in claim 1, in which said last-mentioned means include two silicon-controlled rectifiers for passing to said recording head means only said one half cycle of the alternating current and not said other half cycle, and means for actuating said rectifiers respectively to pass said one half cycle to said head means in accordance with data input signals supplied thereto.
Claim 5
Dependent Claim
67 words
Apparatus as recited in claim 1, in which said motor includes a rotary output element for driving said track, vibratory armature means electromagnetically actuable by said alternating current and which reverse direction of motion on each reversal of direction of said alternating current, and clutch means for driving said rotary element from said armature means in successive unidirectional rotary steps on successive actuations of said armature means.
Claim 6
Dependent Claim
69 words
Apparatus as recited in claim 1, in which said motor includes a rotary output element for driving said track, two vibratory armatures electromagnetically vibrated oppositely by said alternating current and each reversing its direction of motion on each reversal of direction of said alternating current, and two clutches for driving said rotary element from said two armatures alternately and each in one rotary direction but not the reverse direction.
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |