US3797030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intermittent tape drive type data recorder
Assignee: Panasonic Holdings Corp
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Filing: 1971-08-31
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Granted: 1974-03-12
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Expires: 1991-08-31
Abstract
Abstract An intermittent tape drive type data recorder using a magnetic tape cassette as magnetic recording medium and employing a step motor for the capstan drive, whereby handling of the recording medium is facilitated and fully satisfactory intermittent magnetic tape drive characteristic can be achieved with a smallsize construction to ensure reliable data recording and reproduction.
Inventors
- 👤 T Katagiri
- 👤 T Suga
- 👤 S Omiya
- 👤 I Matsuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:22
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
207 words
An intermittent tape drive type data recorder comprising a cassette having a narrOw magnetic tape; a capstan for driving said magnetic tape; a step motor for driving said capstan; step motor drive means for actuating said step motor intermittently in a plurality of steps, wherein said stepping motor is driven such that the motor runs continuously at substantially constant speed; means to record one unit piece of data on said magnetic tape serially or both serially and in parallel for said plurality of steps during continuous running of said step motor; a counter to count the number of step pulses for driving said step motor in the continuous running of said step motor at the time of recording; means to stop said step motor at a position of the step motor advanced at least one step from the position of the step motor at the time when said counter counts a number of step pulses corresponding to the information quantity of one unit piece of data; and a means to detect the last bit of each unit piece of data reproduced from said magnetic tape, said detected bits being utilized to control said step mtoor drive means so as to bring said step motor to a halt.
Claim 2
Dependent Claim
207 words
An intermittent tape drive type data recorder comprising a cassette having a narrOw magnetic tape; a capstan for driving said magnetic tape; a step motor for driving said capstan; step motor drive means for actuating said step motor intermittently in a plurality of steps, wherein said stepping motor is driven such that the motor runs continuously at substantially constant speed; means to record one unit piece of data on said magnetic tape serially or both serially and in parallel for said plurality of steps during continuous running of said step motor; a counter to count the number of step pulses for driving said step motor in the continuous running of said step motor at the time of recording; means to stop said step motor at a position of the step motor advanced at least one step from the position of the step motor at the time when said counter counts a number of step pulses corresponding to the information quantity of one unit piece of data; and a means to detect the last bit of each unit piece of data reproduced from said magnetic tape, said detected bits being utilized to control said step mtoor drive means so as to bring said step motor to a halt.
Claim 3
Dependent Claim
89 words
The intermittent tape drive type data recorder according to claim 1, wherein said step motor drive means is adapted to produce a step signal for causing one continuous step of running of said step motor, said step signal consisting of a train of step pulses uniformly spaced except for the last one, the time interval between the last but one step pulse and the last step pulse being longer than the time interval between two adjacent uniformly spaced step pulses, thereby to reduce the hunting of said step motor.
Claim 4
Dependent Claim
85 words
The intermittent tape drive type data recorder according to claim 1, wherein said step motor drive means includes a step signal generator to supply step pulses to said step motor, an integrator to integrate said clock pulses so as to produce an output for a constant period, a differentiator to differentiate the output of said integrator, and a last step pulse generator to produce the last step pulse for each continuous step of running of said step motor according to the output of said differentiator.
Claim 5
Dependent Claim
88 words
The intermittent tape drive type data recorder accorlding to claim 1, wherein said step motor drive means includes a voltage regulator to reduce a regular step motor voltage from an instant after the generation of the first one of a group of step pulses for each continuous step of running of said step motor and before the reaching of a final motor speed by said step motor, said regular step motor voltage being recovered after the kinetic energy stored in the rotor of said step motor is lost.
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) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |