US3810237A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape recorder
Assignee: Sankyo Kogaku Kogyo Co Ltd
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Filing: 1969-10-17
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Granted: 1974-05-07
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Expires: 1989-10-17
Abstract
Abstract A tape cassette loading tape recorder in which a multi-track magnetic tape provided with a plurality of tape tracks may undergo an automatic change in the direction of tape travel and head channels may be switched over from one to the other according to the directional change of tape travel. The tape recorder includes a pair of capstan shafts adapted to alternately drive the tape in opposite directions of tape travel, and a movable base plate having thereon a rockable operating lever to bring alternately any one of pinch rollers into engagement with its associated capstan shaft, a magnetic head provided with head channels, a head channel selecting switch means, and a tape-end detecting switch means. The movable base plate, upon loading of the cassette on the tape recorder, moves forwardly towards the cassette thereby making tape-to-head engagement to make the tape recorder ready for recording and play-back operation. On the contrary, the movable base plate, upon completion of recording or play-back for all tape tracks, moves away from the tape cassette which is in turn released from a co-operating relation with the tape recorder. The tape recorder is further provided with a cassette loading means which is manually or automatically movable from a non-operative position to an operative position or vice versa. In addition, there are provided in the tape recorder a cam mechanism to control the operational sequence of the tape recorder elements as described above, and another cam mechanism to control the movement of the cassette loading means, both of mechanisms being electrically actuated by loading of the tape cassette to the tape recorder.
Inventors
- 👤 Y Nozawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:52
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/675; G11B15/67544; G11B15/67555; G11B15/67557; G11B15/18; G11B15/1883; G11B15/44; G11B15/442
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
458 words
In a cassette tape recorder for use with a cassette having a tape with at least two tracks recordable in opposite winding directions and including a tape recorder housing having reel shafts and capstan shafts which are alternately driven to feed the tape in the cassette in opposite directions, and further including a movable base plate mounted on said housing in a freely slidable manner for back and forth movement, said movable base plate having pinch rollers and a magnetic head: the improvement comprising an operating means constituted as a single pivotal element on which said pinch rollers are mounted and said pivoted element being mounted on said base plate for rocking movement between a first operating position where one of said pinch rollers is in engagement with its associated capstan shaft to feed the tape in one direction of tape travel and a second operating position where the other of said pinch rollers is in engagement with its associated capstan shaft to feed the tape in the reverse direction of tape travel; resilient means for resiliently biasing said operating means towards said second operating position; locking means for keeping the operating means in said first operating position after the operating means has been rockingly moved against said resilient means to said first operating position; unlocking means operable to release said operating means from the engagement with said locking means; first cam means operable to rockingly move said operating means against said resilient means into engagement with said locking means, second cam means responsive to introduction of a cassette into the housing to advance the base plate forwardly for a recording or playback operation and for moving the base plate backwardly to its original position upon completion of the operation on one of said tape tracks, and means acting on said first cam means for moving the operating means to the first operating position upon introduction of the cassette into the housing, the latter means comprising an electrical drive means, a switch means controlling energization of the drive means, said means being operated both upon introduction of the casssette into the housing and upon completion of the operation on the tape track, said first and second cam means being driven by said drive means, said second cam means being operatively positioned relative to the base plate to effect forward movement of the base plate when the cassette is introduced into the housing and backwards movement upon completion of the operation on the second track, the first cam means being operatively positioned to effect movement of the operating means to said first operating position upon introduction of the cassette into the housing and to allow release of the operating means upon completion of the operation on the second track.
Claim 2
Dependent Claim
458 words
In a cassette tape recorder for use with a cassette having a tape with at least two tracks recordable in opposite winding directions and including a tape recorder housing having reel shafts and capstan shafts which are alternately driven to feed the tape in the cassette in opposite directions, and further including a movable base plate mounted on said housing in a freely slidable manner for back and forth movement, said movable base plate having pinch rollers and a magnetic head: the improvement comprising an operating means constituted as a single pivotal element on which said pinch rollers are mounted and said pivoted element being mounted on said base plate for rocking movement between a first operating position where one of said pinch rollers is in engagement with its associated capstan shaft to feed the tape in one direction of tape travel and a second operating position where the other of said pinch rollers is in engagement with its associated capstan shaft to feed the tape in the reverse direction of tape travel; resilient means for resiliently biasing said operating means towards said second operating position; locking means for keeping the operating means in said first operating position after the operating means has been rockingly moved against said resilient means to said first operating position; unlocking means operable to release said operating means from the engagement with said locking means; first cam means operable to rockingly move said operating means against said resilient means into engagement with said locking means, second cam means responsive to introduction of a cassette into the housing to advance the base plate forwardly for a recording or playback operation and for moving the base plate backwardly to its original position upon completion of the operation on one of said tape tracks, and means acting on said first cam means for moving the operating means to the first operating position upon introduction of the cassette into the housing, the latter means comprising an electrical drive means, a switch means controlling energization of the drive means, said means being operated both upon introduction of the casssette into the housing and upon completion of the operation on the tape track, said first and second cam means being driven by said drive means, said second cam means being operatively positioned relative to the base plate to effect forward movement of the base plate when the cassette is introduced into the housing and backwards movement upon completion of the operation on the second track, the first cam means being operatively positioned to effect movement of the operating means to said first operating position upon introduction of the cassette into the housing and to allow release of the operating means upon completion of the operation on the second track.
Claim 3
Dependent Claim
386 words
In a tape recorder for use with a cassette having a tape with at least two tracks recordable in opposite winding directions and including a tape recorder housing having reel shafts and capstan shafts, and further including a movable base plate mounted on said housing in a freely slidable manner, said movable base plate having a pair of pinch rollers and a magnetic head: the improvement comprising an operating means on which said pinch rollers are mounted and said operating means being mounted on said base plate for rocking movement between a first operating position where one of said pinch rollers is in engagement with its associated capstan shaft to feed the tape in one direction of tape travel and a second operating position where the other of said pinch rollers is in engagement with its associated capstan shaft to feed the tape in the reverse direction of tape travel; means for resiliently biasing said operating means towards said second operating position; locking means for keeping said operating means in said first operating position after the operating means has been rockingly moved against said resilient means to said first operating position; unlocking means consisting of electromagnetic means to release said operating means from the engagement with said locking means; an electrical drive means, a switch means controlling energization of the drive means, said switch means being closed upon introduction of a cassette into the housing, first and second cam means driven by the drive means; said first cam means being controlled by the drive means to rockingly move said operating means to said first operating position upon introductioN of the cassette into housing, the electromagnetic means acting on the locking means to release the operating means and permit said operating means to move to said second operating position; said second cam means being operative in accordance with the energization of the drive means to engage the base plate and cause the same to move back and forth, and means for energizing said electromagnet means at the end of operation on one track of the tape so that said electromagnetic means releases said operating means from said locking means and then said operating means is rockingly moved by the action of said resilient means towards said second operating position to effect operation on the other tape track.
Claim 4
Dependent Claim
386 words
In a tape recorder for use with a cassette having a tape with at least two tracks recordable in opposite winding directions and including a tape recorder housing having reel shafts and capstan shafts, and further including a movable base plate mounted on said housing in a freely slidable manner, said movable base plate having a pair of pinch rollers and a magnetic head: the improvement comprising an operating means on which said pinch rollers are mounted and said operating means being mounted on said base plate for rocking movement between a first operating position where one of said pinch rollers is in engagement with its associated capstan shaft to feed the tape in one direction of tape travel and a second operating position where the other of said pinch rollers is in engagement with its associated capstan shaft to feed the tape in the reverse direction of tape travel; means for resiliently biasing said operating means towards said second operating position; locking means for keeping said operating means in said first operating position after the operating means has been rockingly moved against said resilient means to said first operating position; unlocking means consisting of electromagnetic means to release said operating means from the engagement with said locking means; an electrical drive means, a switch means controlling energization of the drive means, said switch means being closed upon introduction of a cassette into the housing, first and second cam means driven by the drive means; said first cam means being controlled by the drive means to rockingly move said operating means to said first operating position upon introductioN of the cassette into housing, the electromagnetic means acting on the locking means to release the operating means and permit said operating means to move to said second operating position; said second cam means being operative in accordance with the energization of the drive means to engage the base plate and cause the same to move back and forth, and means for energizing said electromagnet means at the end of operation on one track of the tape so that said electromagnetic means releases said operating means from said locking means and then said operating means is rockingly moved by the action of said resilient means towards said second operating position to effect operation on the other tape track.
Claim 5
Dependent Claim
443 words
In a tape recorder for use with a cassette having a tape with at least two said operating means from the recordable in opposite winding directions and including a tape recorder housing having reel shafts, and a movable base plate mounted on said housing in a freely slidable manner, said movable base plate having a pair of pinch rollers and a magnetic head: the improvement comprising an operating means on which said pinch rollers are mounted and said operating means being mounted on said base plate for rocking movement between a first operating position where one of said pinch rollers is in engagement with its associated capstan shaft to feed the tape in one direction of tape travel and a second operating position where the other of said pinch rollers is in engagement with its associated capstan shaft to feed the tape in the reverse direction of tape travel; resilient means for resiliently biasing said operating means towards said second operating position; locking means for keeping said operating means in said first operating position after the operating means has been rockingly moved against said resilient means to said first operating position; unlocking means consisting of electromagnetic means to release said operating me,ns from the engagement with said locking means; an electrical drive means, a first switch means controlling energization of the drive means, said switch means being closed upon introduction of a cassette into the housing, cam means driven by the drive means to rockingly move said operating means to said first operating position upon introduction of the cassette into the housing, the electromagnetic means acting on the locking means to release the operating means and permit said operating means to move to said second operating position; means for energizing said electromagnetic means at the end of an operation in one winding direction on the tape; second switch means on said housing to energize said electromagnetic means; and manually operable means for causing said operating means to rockingly move from its second operating position towards said first operating position against said resilient means; whereby said cam means causes rocking movement of said operating means to said first operating position upon introduction of the cassette into the housing and, after operation of one tape track has been completed, said electromagnetic means releases said operating means from said locking means and then said operating means is rockingly moved by the action of said resilient means towards said second operating position to effect operation on the other tape track, while the tape tracks may be manually switched over from one to the other by selective operation of said second switch means and said manually operable means.
Claim 6
Dependent Claim
443 words
In a tape recorder for use with a cassette having a tape with at least two said operating means from the recordable in opposite winding directions and including a tape recorder housing having reel shafts, and a movable base plate mounted on said housing in a freely slidable manner, said movable base plate having a pair of pinch rollers and a magnetic head: the improvement comprising an operating means on which said pinch rollers are mounted and said operating means being mounted on said base plate for rocking movement between a first operating position where one of said pinch rollers is in engagement with its associated capstan shaft to feed the tape in one direction of tape travel and a second operating position where the other of said pinch rollers is in engagement with its associated capstan shaft to feed the tape in the reverse direction of tape travel; resilient means for resiliently biasing said operating means towards said second operating position; locking means for keeping said operating means in said first operating position after the operating means has been rockingly moved against said resilient means to said first operating position; unlocking means consisting of electromagnetic means to release said operating me,ns from the engagement with said locking means; an electrical drive means, a first switch means controlling energization of the drive means, said switch means being closed upon introduction of a cassette into the housing, cam means driven by the drive means to rockingly move said operating means to said first operating position upon introduction of the cassette into the housing, the electromagnetic means acting on the locking means to release the operating means and permit said operating means to move to said second operating position; means for energizing said electromagnetic means at the end of an operation in one winding direction on the tape; second switch means on said housing to energize said electromagnetic means; and manually operable means for causing said operating means to rockingly move from its second operating position towards said first operating position against said resilient means; whereby said cam means causes rocking movement of said operating means to said first operating position upon introduction of the cassette into the housing and, after operation of one tape track has been completed, said electromagnetic means releases said operating means from said locking means and then said operating means is rockingly moved by the action of said resilient means towards said second operating position to effect operation on the other tape track, while the tape tracks may be manually switched over from one to the other by selective operation of said second switch means and said manually operable means.
Claim 7
Dependent Claim
292 words
The tape recorder as set forth in claim 1 wherein said drive means comprises a motor, and a rotatable shaft operatingly connected to said motor, said second cam means comprising an eccentric cam disc mounted on said shaft to move said movable base plate back and forth, said first cam means comprising an elongated cam element mounted on said shaft for acting on said operating means, and a cam member also mounted on said rotating shaft, said cam member being provided thereon with a pair of diametrically opposed raised portions, said switCh means comprising a group of electrical contacts consisting of a first contact, a second contact, a third contact and a fourth contact, said second and third contracts being engageable with said cam member and controlling energization and deenergization of said motor, said first contact being adapted to be brought into contact with said second contact upon loading of a tape cassette, said first contact being also connected in parallel with said contact, said fourth contact being arranged in such a manner that said third contact may be, just after released from one of said raised portions of said cam member, thrown into contact with said fourth contact, a switch and said fourth contact being connected to said motor in parallel with said second contact through said switch which will be at least instantaneously turned on upon completion of the operation of the second tape track so that loading of the tape cassette causes energization of the motor which in turn moves the movable base plate forwardly to carry out the playback operation, and upon completion of playback operation of both tape tracks, the motor is similarly energized to thereby move the movable base plate backwardly to cease the playback operation.
Claim 8
Dependent Claim
77 words
The tape recorder according to claim 4, wherein said elongated cam element comprises a lobe-like cam element co-axially mounted on said eccentric cam disc, said lobe-like cam element being rotated so as to rockingly move said operating means to its first operating position where the operating means may be locked and further being stopped at a cam position where it is in association with the operating means which has been rockingly moved to said second operating position.
Claim 9
Dependent Claim
310 words
In a tape recorder including a tape recording housing having reel shafts and capstan shafts which are alternately driven to feed the tape in opposite directions, and further including a movable base plate mounted on said housing in a freely slidable manner for back and forth movement, said movable base plate having pinch rollers and a magnetic head: the improvement comprising a rotating shaft operatingly connected to a motor, an eccentric cam disc mounted on said rotating shaft to move said movable base plate back and forth, a cam member also mounted on said rotating shaft, said cam member being provided thereon with a pair of diametrically opposed raised portions, a group of electric contacts consisting of a first contact, a second contact, a third contact and a fourth contact, said second and third contacts being engageable with said cam member and controlling energization/deenergization of said motor, said first contact being adapted to be brought into contact with said second contact upon loading of a tape cassette, said first contact being also connected in parallel with said second contact, said fourth contact being arranged in such a manner that said third contact may be, just after release from one of said raised portions of said cam member, thrown into contact with said fourth contact, a switch means and said fourth contact being connected to said motor in parallel with said second contact through said sitch means which will be at least instantaneously turned on upon completion of the play-back operation of the second tape track so that loading of the tape cassette causes energization of the motor which in turn moves the movable base plate forwardly to carry out the play-back operation, and upon completion of play-back operation of both tape tracks, the motor is similarly energized to thereby move the movable base plate backwardly to cease the play-back operation.
Claim 10
Dependent Claim
310 words
In a tape recorder including a tape recording housing having reel shafts and capstan shafts which are alternately driven to feed the tape in opposite directions, and further including a movable base plate mounted on said housing in a freely slidable manner for back and forth movement, said movable base plate having pinch rollers and a magnetic head: the improvement comprising a rotating shaft operatingly connected to a motor, an eccentric cam disc mounted on said rotating shaft to move said movable base plate back and forth, a cam member also mounted on said rotating shaft, said cam member being provided thereon with a pair of diametrically opposed raised portions, a group of electric contacts consisting of a first contact, a second contact, a third contact and a fourth contact, said second and third contacts being engageable with said cam member and controlling energization/deenergization of said motor, said first contact being adapted to be brought into contact with said second contact upon loading of a tape cassette, said first contact being also connected in parallel with said second contact, said fourth contact being arranged in such a manner that said third contact may be, just after release from one of said raised portions of said cam member, thrown into contact with said fourth contact, a switch means and said fourth contact being connected to said motor in parallel with said second contact through said sitch means which will be at least instantaneously turned on upon completion of the play-back operation of the second tape track so that loading of the tape cassette causes energization of the motor which in turn moves the movable base plate forwardly to carry out the play-back operation, and upon completion of play-back operation of both tape tracks, the motor is similarly energized to thereby move the movable base plate backwardly to cease the play-back operation.
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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) | 1977-05-06 | 1977-11-05 | 1978-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-06 | 1981-11-05 | 1982-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-06 | 1985-11-05 | 1986-05-07 | $7700.00 | Window Closed / Lapsed |