Patent US3714666A successfully refreshed from Google Patents.
US3714666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Portable magnetic tape recorder having electronic error detecting means
Assignee: Individual
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Filing: 1970-12-18
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Granted: 1973-01-30
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Expires: 1990-12-18
Abstract
Abstract A portable recording device for recording data on magnetic tape which has manually operated make and break contact key switches. A transistorized detector circuit responds to a keying error constituting simultaneous operation of more than one key switch to actuate an error signal. The error condition prevents recording of any data until cleared by selective key operation. Integrated logic circuit means prevents storing and recording of data until spurious pulses generated by making and breaking key switch contacts are suppressed. A write circuit and dual recording head record data on two tracks simultaneously. An end of tape detector, a manually controlled advance circuit for the tape drive step motor, and an automatically actuated signal of low battery voltage are also provided.
Inventors
- 👤 W Guidi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:41
CPC Classifications
G; G06; G06F; G06F3/00; G06F3/01; G06F3/02; G06F3/023; G06F3/0232
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
157 words
A recording device for recording data pulses on a magnetic tape comprising, a plurality of manually operable switches, a battery power supply connected in circuit with said switches for generating pulses as said switches are operated respectively, a tape drive motor connected in circuit to said power supply for advancing said tape, a control logic circuit interconnecting said motor and said power supply for enabling said motor to advance said tape, an error signal generator means connected in circuit with said switches and only responsive to the simultaneous operation of more than one of said switches, a keying error signaling means, and an error conditioning means connected in circuit with said generating means and said signaling means for indicating occurence of said keying error said error conditioning means further connected to said control logic circuit for preventing advance of said tape by said motor until the error is cleared by a pre-determined selected operation of said switches.
Claim 2
Dependent Claim
157 words
A recording device for recording data pulses on a magnetic tape comprising, a plurality of manually operable switches, a battery power supply connected in circuit with said switches for generating pulses as said switches are operated respectively, a tape drive motor connected in circuit to said power supply for advancing said tape, a control logic circuit interconnecting said motor and said power supply for enabling said motor to advance said tape, an error signal generator means connected in circuit with said switches and only responsive to the simultaneous operation of more than one of said switches, a keying error signaling means, and an error conditioning means connected in circuit with said generating means and said signaling means for indicating occurence of said keying error said error conditioning means further connected to said control logic circuit for preventing advance of said tape by said motor until the error is cleared by a pre-determined selected operation of said switches.
Claim 3
Dependent Claim
157 words
A recording device for recording data pulses on a magnetic tape comprising, a plurality of manually operable switches, a battery power supply connected in circuit with said switches for generating pulses as said switches are operated respectively, a tape drive motor connected in circuit to said power supply for advancing said tape, a control logic circuit interconnecting said motor and said power supply for enabling said motor to advance said tape, an error signal generator means connected in circuit with said switches and only responsive to the simultaneous operation of more than one of said switches, a keying error signaling means, and an error conditioning means connected in circuit with said generating means and said signaling means for indicating occurence of said keying error said error conditioning means further connected to said control logic circuit for preventing advance of said tape by said motor until the error is cleared by a pre-determined selected operation of said switches.
Claim 4
Dependent Claim
157 words
A recording device for recording data pulses on a magnetic tape comprising, a plurality of manually operable switches, a battery power supply connected in circuit with said switches for generating pulses as said switches are operated respectively, a tape drive motor connected in circuit to said power supply for advancing said tape, a control logic circuit interconnecting said motor and said power supply for enabling said motor to advance said tape, an error signal generator means connected in circuit with said switches and only responsive to the simultaneous operation of more than one of said switches, a keying error signaling means, and an error conditioning means connected in circuit with said generating means and said signaling means for indicating occurence of said keying error said error conditioning means further connected to said control logic circuit for preventing advance of said tape by said motor until the error is cleared by a pre-determined selected operation of said switches.
Claim 5
Dependent Claim
23 words
A recording device as defined in claim 1 wherein said keying error is cleared by the simultaneous operation of two of said switches.
Claim 6
Dependent Claim
45 words
A recording device as defined in claim 1 wherein said signaling means includes a flasher circuit means and a lamp means in circuit with said flasher circuit such that said lamp will flash on and off whenever said keying error is sensed by said detector.
Claim 7
Dependent Claim
40 words
A recording device as defined in claim 1 further comprising an activity signaling means connected in circuit with said control logic circuit and said power supply for signaling when the voltage from said power supply falls below a predetermined magnitude.
Claim 8
Dependent Claim
43 words
A recording device as defined in claim 1 wherein said control logic circuit establishes a BUSY condition in said error conditioning means whereby a subsequent operation of any of said switches will cause said signaling means to indicate occurrence of a keying error.
Claim 9
Dependent Claim
64 words
A recording device as defined in claim 1 further comprising, a stationary recording head, a tape sensing means arranged to contact said tape as it is driven by said recording head, an end of tape signaling means, and and end of tape circuit interconnecting said tape sensing means and said end of tape signaling means when said tape approaches the end of its run.
Claim 10
Dependent Claim
50 words
A recording device as defined in claim 6 further comprising a flasher circuit means and wherein said end of tape signaling means includes a lamp means in circuit with said flasher circuit means whereby said lamp will flash on and off when said tape approaches the end of its run.
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) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |