Patent US4340915A successfully refreshed from Google Patents.
US4340915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Microphone sensitivity-changing apparatus
Assignee: Olympus Corp
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Filing: 1980-05-29
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Granted: 1982-07-20
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Expires: 2000-05-29
Abstract
Abstract A microphone sensitivity-changing apparatus used with a tape recorder whose recording or playback mode can be paused and whose microphone has its sensitivity changed in accordance with the object for which said tape recorder is applied, the improvement being that a first switch for instructing the pause mode and a second switch for instructing the changeover of the sensitivity of the microphone are operated interlockingly with each other.
Inventors
- 👤 Toshiaki Nakamura
- 👤 Akira Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:36
CPC Classifications
G; G11; G11B; G11B31/00; G11B5/00; G11B5/02
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
125 words
In a tape recorder having means for providing a pause mode of operation, and a microphone circuit which includes a microphone, a microphone sensitivity-changing apparatus for changing the sensitivity of the microphone circuit in accordance with the object for which said tape recorder is being used, the improvement comprising: a first switch means coupled to said pause mode providing means for controlling the pause mode of the tape recorder; and second switch means coupled to said microphone circuit and to said first switch means for selectively changing the sensitivity of the microphone; said second switch means being interlockingly operable with said first switch means, whereby operation of said first switch means causes operation of said second switch means to change said sensitivity of the microphone.
Claim 2
Dependent Claim
125 words
In a tape recorder having means for providing a pause mode of operation, and a microphone circuit which includes a microphone, a microphone sensitivity-changing apparatus for changing the sensitivity of the microphone circuit in accordance with the object for which said tape recorder is being used, the improvement comprising: a first switch means coupled to said pause mode providing means for controlling the pause mode of the tape recorder; and second switch means coupled to said microphone circuit and to said first switch means for selectively changing the sensitivity of the microphone; said second switch means being interlockingly operable with said first switch means, whereby operation of said first switch means causes operation of said second switch means to change said sensitivity of the microphone.
Claim 3
Dependent Claim
46 words
The microphone sensitivity-changing apparatus of claim 1, wherein, when said first switch means designates the pause mode, said sensitivity is high; and when said first switch means is released from the pause mode, said sensitivity is low, as controlled by said interlockingly operated second switch means.
Claim 4
Dependent Claim
78 words
The microphone sensitivity-changing apparatus of claim 1 or 2, which comprises: a low-cut filter included in said microphone circuit for decreasing the amplitude of low frequency components of a signal corresponding to an output from a microphone; and third switch means interlockingly operable with said first and second switch means, and being coupled to said low-cut filter, for changing the cut-off frequency of said low-cut filter in interlocking relationship with operation of said first and second switch means.
Claim 5
Dependent Claim
52 words
The microphone sensitivity-changing apparatus of claim 3, wherein said third switch means causes the cut-off frequency of said low-cut filter to rise when said first and second switch means are operated to positions which cause the microphone sensitivity to fall in accordance with changes in the operation modes of said tape recorder.
Claim 6
Dependent Claim
83 words
A tape recorder having a microphone circuit and a pause device for temporarily stopping the transporting of tape on the tape recorder comprising: first switch means operably coupled to said pause device for controlling the pause operation; second switch means operably coupled to said microphone circuit for changing the sensitivity thereof; and means coupled to said first and second switch means for ganging them so that a change operation of said first switch means is synchronized with that of said second switch means.
Claim 7
Dependent Claim
83 words
A tape recorder having a microphone circuit and a pause device for temporarily stopping the transporting of tape on the tape recorder comprising: first switch means operably coupled to said pause device for controlling the pause operation; second switch means operably coupled to said microphone circuit for changing the sensitivity thereof; and means coupled to said first and second switch means for ganging them so that a change operation of said first switch means is synchronized with that of said second switch means.
Claim 8
Dependent Claim
63 words
The tape recorder of claim 5, wherein when said first switch means designates the pause operation of said tape recorder, said sensitivity of said microphone circuit is high; and when said first switch means is released from the pause operation position thereof, said sensitivity of said microphone circuit is low, as controlled by said ganged operation of said first and second switch means.
Claim 9
Dependent Claim
87 words
The tape recorder of claim 5 or 6, wherein a microphone is coupled to said microphone circuit, and further comprising: a low-cut filter included in said microphone circuit for decreasing the amplitude of low frequency components of a signal corresponding to an output from the microphone; and third switch means interlockingly operable with said first and second switch means, and being coupled to said low-cut filter, for changing the cutoff frequency of said low-cut filter in interlocking relationship with operation of said first and second switch means.
Claim 10
Dependent Claim
51 words
The tape recorder of claim 7, wherein said third switch means causes the cut-off frequency of said low-cut filter to rise when said first and second switch means are operated to positions which cause the microphone sensitivity to fall in accordance with changes in the operation modes of said tape recorder.
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) | 1985-07-19 | 1986-01-18 | 1986-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-19 | 1990-01-18 | 1990-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-19 | 1994-01-18 | 1994-07-20 | $7700.00 | Window Closed / Lapsed |