Patent JPS6177370A successfully refreshed from Google Patents.
US4198664A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonrecorded section detection in a tape recorder apparatus
Assignee: Sharp Corp
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Filing: 1978-03-30
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Granted: 1980-04-15
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Expires: 1998-03-30
Abstract
Abstract A nonrecorded section detection switch is provided through which a power supply voltage is applied to an amplifier associated with a reproduction head at a desired time. A switching transistor is connected to receive the output signal of the amplifier and turns ON only when the amplifier develops the signal. A charge/discharge loop is formed through the base and the emitter of the switching transistor, and a level detector is provided to control a tape feed mechanism in accordance with a charge level of the charge/discharge loop.
Inventors
- 👤 Tatsuhiro Yasunaga
- 👤 Masaru Fujii
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:14
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/02; G11B15/10; G11B15/103; G11B27/00; G11B27/10; G11B27/19; G11B27/22; G11B27/36
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
237 words
A nonrecorded section detection system for detecting a nonrecorded section provided between two adjacent programs recorded on a magnetic tape in a tape recorder apparatus, said nonrecorded section detection system comprising: a power supply source; reproduction head means which is placed in physical contact with said magnetic tape for generating an output signal indicative of the presence of a recorded section of said magnetic tape; tape feed means for moving said magnetic tape past said reproduction head in a selected one of a plurality of operation modes; amplifier means for amplifying said output signal from said reproduction head means; nonrecorded section detection means for connecting said amplifier means to said power supply source at a desired time; switching means responsive to an output signal of said amplifier means in such a manner that said switching means assumes a first condition when said output signal of said amplifier means is above a predetermined level and assumes a second condition when said output signal of said amplifier means is below said predetermined level; charge/discharge circuit means connected to receive charging current from said power supply source through said switching means when said switching means assumes said first condition; level detector means for detecting the charge level of said charge/discharge circuit; and control means for charging said tape feed means from said selected one of said operation modes to another in accordance with the detection of said level detector means.
Claim 2
Dependent Claim
237 words
A nonrecorded section detection system for detecting a nonrecorded section provided between two adjacent programs recorded on a magnetic tape in a tape recorder apparatus, said nonrecorded section detection system comprising: a power supply source; reproduction head means which is placed in physical contact with said magnetic tape for generating an output signal indicative of the presence of a recorded section of said magnetic tape; tape feed means for moving said magnetic tape past said reproduction head in a selected one of a plurality of operation modes; amplifier means for amplifying said output signal from said reproduction head means; nonrecorded section detection means for connecting said amplifier means to said power supply source at a desired time; switching means responsive to an output signal of said amplifier means in such a manner that said switching means assumes a first condition when said output signal of said amplifier means is above a predetermined level and assumes a second condition when said output signal of said amplifier means is below said predetermined level; charge/discharge circuit means connected to receive charging current from said power supply source through said switching means when said switching means assumes said first condition; level detector means for detecting the charge level of said charge/discharge circuit; and control means for charging said tape feed means from said selected one of said operation modes to another in accordance with the detection of said level detector means.
Claim 3
Dependent Claim
40 words
The nonrecorded section detection system of claim 1, wherein the switching means comprises a transistor the base of which is connected to receive the output signal of the amplifier means and the collector is connected to the charge/discharge circuit means.
Claim 4
Dependent Claim
22 words
The nonrecorded section detection system of claim 1, wherein the nonrecorded section detection switch is mechanically associated with said tape feed means.
Claim 5
Dependent Claim
16 words
The nonrecorded section detection system of claim 1, wherein the amplifier means comprises a limiter/amplifier means.
Claim 6
Dependent Claim
18 words
The nonrecorded section detection system of claim 1, wherein the level detector means comprises a Schmitt trigger circuit.
Claim 7
Dependent Claim
39 words
The nonrecorded section detection system of claim 1, which further comprises a differentiation circuit means for differentiating an output signal of the level detector means, the output signal of the differentiation circuit means being applied to said control means.
Claim 8
Dependent Claim
40 words
The nonrecorded section detection system of claim 6, which further comprises an error operation preventing means for disconnecting said differentiation circuit means and said control means when said power supply source is first connected to said non-recorded section detection system.
Claim 9
Dependent Claim
90 words
The nonrecorded section detection system of claim 7, wherein said error operation preventing means comprises semiconductor means coupled between said differentiation circuit means and said control means, said semiconductor means being OFF when said power supply is first connected to said nonrecorded section detection system and blocking the operation of said differentiation circuit means and said control means when in said OFF condition, and time delay means for turning said semiconductor means ON a predetermined period of time after said power supply is connected to said nonrecorded section detection system.
Claim 10
Dependent Claim
35 words
The nonrecorded section detection system of claim 1, which further comprises an error operation preventing means for disconnecting said switching means when said power supply source is first connected to said nonrecorded section detection system.
Claim 11
Dependent Claim
85 words
The nonrecorded section detection system of claim 9, wherein said error operation preventing means comprises semiconductor means coupled between said switching means and said amplifier means, said semiconductor means being OFF when said power supply source is first connected to said nonrecorded section detection system and blocking the operation of said switching means when in said OFF condition, and time delay means for turning said semiconductor means ON a predetermined period time after said power supply source is connected to said nonrecorded section detection system.
Claim 12
Dependent Claim
211 words
A nonrecorded section detection system for detecting a nonrecorded section provided between two adjacent programs recorded on a magnetic tape in a tape recorder apparatus including, a power supply source, reproduction head means for generating an output signal indicative of the presence of a recorded section on said magnetic tape, tape feed means for moving said magnetic tape past said reproduction head in a selected one of a plurality of operation modes; means for amplifying said output signal from said reproduction head means, and a control means for changing the operation state of said tape feed means, said nonrecorded section detection system comprising: switching means responsive to an output signal of said amplifier means in such a manner that said switching means assumes a first condition when said output signal of said amplifier means is above a predetermined level and assumes a second condition when said output signal of said amplifier means is below said predetermined level; charge/discharge circuit means connected to receive its charge current from a power supply source through said switching means when said switching means assumes said first condition; and means for operating said control means to change the operation mode of said tape feed means in accordance with the charge level of said charge/discharge circuit means.
Claim 13
Dependent Claim
211 words
A nonrecorded section detection system for detecting a nonrecorded section provided between two adjacent programs recorded on a magnetic tape in a tape recorder apparatus including, a power supply source, reproduction head means for generating an output signal indicative of the presence of a recorded section on said magnetic tape, tape feed means for moving said magnetic tape past said reproduction head in a selected one of a plurality of operation modes; means for amplifying said output signal from said reproduction head means, and a control means for changing the operation state of said tape feed means, said nonrecorded section detection system comprising: switching means responsive to an output signal of said amplifier means in such a manner that said switching means assumes a first condition when said output signal of said amplifier means is above a predetermined level and assumes a second condition when said output signal of said amplifier means is below said predetermined level; charge/discharge circuit means connected to receive its charge current from a power supply source through said switching means when said switching means assumes said first condition; and means for operating said control means to change the operation mode of said tape feed means in accordance with the charge level of said charge/discharge circuit means.
Claim 14
Dependent Claim
29 words
The nonrecorded section detection system of claim 4, wherein said means for operating said control means comprise level detector means for detecting the charge level of said charge/discharge circuit.
Claim 15
Dependent Claim
38 words
The nonrecorded section detection system of claim 12, which further comprises a differentiation circuit means for differentiating an output signal of the level detector means, the output signal of the differentiation circuit being applied to said control means.
Claim 16
Dependent Claim
28 words
The nonrecorded section detection system of claim 11, which further comprises a nonrecorded section detection switch means for placing said nonrecorded section detection system into an operative condition.
Claim 17
Dependent Claim
164 words
A nonrecorded section detection system for detecting a nonrecorded section provided between two adjacent programs recorded on a magnetic tape in a tape recorder apparatus, said nonrecorded section detection system comprising: reproduction head means which is placed in physical contact with said magnetic tape for developing an output signal indicative of the presence of a recorded section on said magnetic tape; tape feed means for moving said magnetic tape past said reproduction head in a selected one of a plurality of operation modes; charge/discharge circuit means responsive to said output signal from said reproduction head means to charge to a predetermined level; level detector means for detecting said predetermined level of said charge/discharge circuit means and generating a control signal means; differentiation circuit means for differentiating the control signal of said level detector means; and control means connected to receive the differentiated control signal from said differentiation circuit for changing said tape feed means from said selected one of said operation modes to another.
Claim 18
Dependent Claim
164 words
A nonrecorded section detection system for detecting a nonrecorded section provided between two adjacent programs recorded on a magnetic tape in a tape recorder apparatus, said nonrecorded section detection system comprising: reproduction head means which is placed in physical contact with said magnetic tape for developing an output signal indicative of the presence of a recorded section on said magnetic tape; tape feed means for moving said magnetic tape past said reproduction head in a selected one of a plurality of operation modes; charge/discharge circuit means responsive to said output signal from said reproduction head means to charge to a predetermined level; level detector means for detecting said predetermined level of said charge/discharge circuit means and generating a control signal means; differentiation circuit means for differentiating the control signal of said level detector means; and control means connected to receive the differentiated control signal from said differentiation circuit for changing said tape feed means from said selected one of said operation modes to another.
Claim 19
Dependent Claim
33 words
The nonrecorded section detection system of claim 15 wherein said differentiation circuit means develops said differentiated output when said level detector means detects that said output signal of said reproduction means has terminated.
Claim 20
Dependent Claim
18 words
The nonrecorded section detection system of claim 16, wherein said level detector means comprises a Schmitt trigger circuit.
Claim 21
Dependent Claim
25 words
The nonrecorded section detection system of claim 15, wherein said control means comprise means solenoid for shifting the operation mode of said tape feed means.
Claim 22
Dependent Claim
23 words
The nonrecorded section detection system of claim 18, wherein said solenoid means is enabled by said differentiated output of said differentiation circuit means.
Claim 23
Dependent Claim
156 words
In a nonrecorded section detection system for detecting a nonrecorded section provided between two adjacent programs recorded on a recording medium in a reproduction system including, tape feed means for moving said magnetic tape past said reproduction head in a selected one of a plurality of operation modes, reproduction head means for generating an output signal indicative of the presence of a recorded section on said recording media, a nonrecorded section detection circuit means connected to receive said output signal derived from said reproduction head for developing a nonrecorded section detection signal, and a control means for changing the operation of said tape drive means, the improvement in said nonrecorded section detection system comprising; differentiation circuit means for differentiating said nonrecorded section detection signal derived from said nonrecorded section detection circuit means, the output signal of the differentiation circuit being applied to said control means, thereby stabilizing and speeding up the operation of the control means.
Claim 24
Dependent Claim
156 words
In a nonrecorded section detection system for detecting a nonrecorded section provided between two adjacent programs recorded on a recording medium in a reproduction system including, tape feed means for moving said magnetic tape past said reproduction head in a selected one of a plurality of operation modes, reproduction head means for generating an output signal indicative of the presence of a recorded section on said recording media, a nonrecorded section detection circuit means connected to receive said output signal derived from said reproduction head for developing a nonrecorded section detection signal, and a control means for changing the operation of said tape drive means, the improvement in said nonrecorded section detection system comprising; differentiation circuit means for differentiating said nonrecorded section detection signal derived from said nonrecorded section detection circuit means, the output signal of the differentiation circuit being applied to said control means, thereby stabilizing and speeding up the operation of the control means.
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) | 1983-04-15 | 1983-10-15 | 1984-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-15 | 1987-10-15 | 1988-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-15 | 1991-10-15 | 1992-04-15 | $7700.00 | Window Closed / Lapsed |