Patent US3695550A successfully refreshed from Google Patents.
US3695550A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape drive shut-off
Assignee: Scanfax Systems Corp
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Filing: 1970-05-20
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Granted: 1972-10-03
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Expires: 1990-05-20
Abstract
Abstract A tape drive shut-off mechanism and circuit for use in a tape recorder-reproducer system is described as including, in cooperation with means for reproducing the audio information from a master tape onto a ''''slave'''' tape, a mechanism for sensing the completion of the winding of the master tape from its feed spindle to its take-up spindle. Also disclosed is a means for acquiring a signal from the aforementioned mechanism in response to the completion of winding and the use of such a signal in terminating the operation of a common drive motor for both the master tape and the ''''slave'''' tape. In this way, the ''''slave'''' tape winding is terminated in response to the termination of winding of the master tape.
Inventors
- 👤 Thomas M Lennox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:26
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/02; G11B15/05; G11B15/093; G11B15/18; G11B15/22; G11B5/00; G11B5/86
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
184 words
A mechanism and circuit for use in cooperation with a drive motor for a recording system which records audio information from a master tape onto a ''''slave'''' tape, said mechanism and circuit terminating operation of said drive motor in response to completion of winding of said master tape onto a rotatable master take-up spindle, comprising light responsive means for sensing said completion of winding, said light responsive means including a sensor light, a photocell and a rotatable perforated disc coaxial with said master take-up spindle, the disc rotation terminating upon termination of rotation of said spindle, and circuit means for terminating operation of said drive motor in response to said completion of winding, said circuit means including first switch means, said first switch means being rendered conductive in response to an AC signal being provided to said first switch means by rotation of said rotatable perforated disc between said sensor light and said photocell and said first switch means being rendered non-conductive in response to a DC signal being provided to said first switch means upon termination of rotation of said rotatable perforated disc.
Claim 2
Dependent Claim
184 words
A mechanism and circuit for use in cooperation with a drive motor for a recording system which records audio information from a master tape onto a ''''slave'''' tape, said mechanism and circuit terminating operation of said drive motor in response to completion of winding of said master tape onto a rotatable master take-up spindle, comprising light responsive means for sensing said completion of winding, said light responsive means including a sensor light, a photocell and a rotatable perforated disc coaxial with said master take-up spindle, the disc rotation terminating upon termination of rotation of said spindle, and circuit means for terminating operation of said drive motor in response to said completion of winding, said circuit means including first switch means, said first switch means being rendered conductive in response to an AC signal being provided to said first switch means by rotation of said rotatable perforated disc between said sensor light and said photocell and said first switch means being rendered non-conductive in response to a DC signal being provided to said first switch means upon termination of rotation of said rotatable perforated disc.
Claim 3
Dependent Claim
42 words
The invention according to claim 1 further including second switch means being rendered non-conductive in response to said first switch means being rendered conductive and said second switch means being rendered conductive in response to said first switch means being rendered non-conductive.
Claim 4
Dependent Claim
42 words
The invention according to claim 2 wherein said sensor light and photocell are mounted on a circuit board, said circuit board defining a notch between said sensor light and said photocell, and part of said rotatable disc being rotatable in said notch.
Claim 5
Dependent Claim
23 words
The invention according to claim 3 wherein the plane of said circuit board is generally perpendicular to the plane of said rotatable disc.
Claim 6
Dependent Claim
65 words
The invention according to claim 2 wherein a clutch mechanism is provided coaxially with said spindle, and a belt is provided to rotate said spindle in response to operation of said drive motor, said belt also providing motion to said ''''salve'''' tape in response to said drive motor, and said spindle rotation being separable from motion of said belt by means of said clutch mechanism.
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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) | 1975-10-03 | 1976-04-03 | 1976-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-03 | 1980-04-03 | 1980-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-03 | 1984-04-03 | 1984-10-03 | $7700.00 | Window Closed / Lapsed |