US3915408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic stop device for a tape recorder
Assignee: KOUFU SANKY KK
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Filing: 1974-02-13
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Granted: 1975-10-28
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Expires: 1994-02-13
Abstract
Abstract An automatic stop device for a tape recorder comprising a first lever having one end provided with a camming opening containing an elongated slot and engaging indentations, the first lever being pivotably mounted on one of the reel tables of the tape recorder in frictional engagement therewith. A second lever has a pin at one end engaged in the camming opening, and the second lever is pivoted on the chassis of the tape recorder such that the pin is rotatably biased towards the elongated slot of the camming opening. An actuating piece is provided with a fan-shaped camming portion at one end, and it is rotatably attached to a side wall of the second lever such that the actuating piece may turn only in a direction perpendicular to the axis of rotation of the second lever, while being rotatably biased in a given direction. A pinion is rotatably driven by a rotary driving source of the tape recorder and a projection is eccentrically mounted on the pinion to contact the fan-shaped camming portion so that under the rotation of the reel table, the pin locks within the camming opening to engage the indentations thereof, whereas when rotation of the reel table ceases, the pin enters the elongated slot of the camming opening to provide a large amount of rotational rocking movement of the second lever for stopping the rotary drive of the tape recorder. The stop device further includes an actuating lever which is pivotably mounted on the chassis of the tape recorder to move the pinch roller away from the capstan and the idler rollers away from the reel tables when a pause push button of the tape recorder is depressed. A rod is connected to a release mechanism for the push buttons and the rod is attached to the actuating piece, and is operated thereby through a mechanism when the pin enters the elongated slot of the camming opening.
Inventors
- 👤 Mitsuo Ishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:07
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/02; G11B15/10; G11B15/18; G11B15/46
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
273 words
An automatic stop device for a tape recorder having a chassis, a tape transporting mechanism including a rotary driving source, a pair of winding reel tables, a capstan and a pinch roller, said device comprising: a first lever having at one end a camming opening containing an elongated slot and engaging indentations, said first lever being pivotably mounted on one of said reel tables frictionally therewith, a second lever having at one end a pin engaging the camming opening of said first lever, means pivotably supporting the second lever on the chassis of the tape recorder such that said pin is rotatably biased towards the elongated slot of said camming opening of said first lever, an actuating piece having a fan-shaped camming portion at one end and rotatably attached to the said second lever such that the actuating piece may turn only in a direction perpendicular to the axis of rotation of said second lever and be rotatably biased in a given direction, a pinion rotatably driven by said rotary driving source of said tape recorder, and a projection eccentrically provided on said pinion in a position so as to be able to make contact with the fan-shaped camming portion of said actuating piece, so that under rotation of said reel table, said pin rocks within said camming opening of said first lever to engage the indentations thereof while when rotation of said reel table ceases, said pin enters said elongated slot of said camming opening of the first lever, thereby to provide a large amount of rotational rocking of said second lever for stopping the rotary drive source of the tape recorder.
Claim 2
Dependent Claim
273 words
An automatic stop device for a tape recorder having a chassis, a tape transporting mechanism including a rotary driving source, a pair of winding reel tables, a capstan and a pinch roller, said device comprising: a first lever having at one end a camming opening containing an elongated slot and engaging indentations, said first lever being pivotably mounted on one of said reel tables frictionally therewith, a second lever having at one end a pin engaging the camming opening of said first lever, means pivotably supporting the second lever on the chassis of the tape recorder such that said pin is rotatably biased towards the elongated slot of said camming opening of said first lever, an actuating piece having a fan-shaped camming portion at one end and rotatably attached to the said second lever such that the actuating piece may turn only in a direction perpendicular to the axis of rotation of said second lever and be rotatably biased in a given direction, a pinion rotatably driven by said rotary driving source of said tape recorder, and a projection eccentrically provided on said pinion in a position so as to be able to make contact with the fan-shaped camming portion of said actuating piece, so that under rotation of said reel table, said pin rocks within said camming opening of said first lever to engage the indentations thereof while when rotation of said reel table ceases, said pin enters said elongated slot of said camming opening of the first lever, thereby to provide a large amount of rotational rocking of said second lever for stopping the rotary drive source of the tape recorder.
Claim 3
Dependent Claim
113 words
An automatic stop device as set forth in claim 1 wherein the tape recorder has push buttons and a releasing mechanism therefor, said device further comprising a rod connected to the releasing mechanism for the push buttons, said rod being attached to said actuating piece, a rack provided in the vicinity of said fan-shaped camming portion, said rack meshing with said pinion when said pin of said second lever enters said elongated slot of said camming opening of said first lever and said second lever rocks to a great extent, thereby turning said actuating piece against the rotational biasing effect to move said rod to actuate said releasing mechanism of the push button.
Claim 4
Dependent Claim
38 words
An automatic stop device as set forth in claim 1 wherein said engaging indentations of said camming opening of said first lever connect with said elongated slot with a sharp angle provided between the indentations and the slot.
Claim 5
Dependent Claim
62 words
An automatic stop device as set forth in claim 1 wherein said camming opening of said first lever is constituted by said elongated slot, a single first engaging indentation and a plurality of second opposite engaging indentations offset upwards and downwards with respect to said first indentation, said elongated slot being positioned between said first indentation and said plurality of second indentations.
Claim 6
Dependent Claim
126 words
An automatic stop device as set forth in claim 1 further including a brake plate movably supported on the chassis of the tape recorder so as to be in or out of contact with said reel table and a reset lever pivotably mounted on said chassis with one end in contact with said brakiNg plate, said second lever having an upstanding piece which is engagable by the other end of said reset lever, whereby, when said braking plate comes into contact with the reel table incidentally to halt rotation thereof, said second lever is compulsorily turned due to turning of said reset lever so that the pin of said second lever may come out of the elongated slot of the camming opening of said first lever.
Claim 7
Dependent Claim
80 words
An automatic stop device as set forth in claim 5 further including a resilient plate spring mounted on said one end of the first lever facing said braking plate, such that when said braking plate comes into contact with the reel table incidentally to halt rotation thereof, said braking plate turns said first lever through said plate spring so as to bring said pin of said second lever into the engaging indentations of the camming opening of said first lever.
Claim 8
Dependent Claim
132 words
An automatic stop device as set forth in claim 1 wherein the tape recorder has idler rollers for engaging the reel tables, and operating push buttons including a pause push button, said device further including an actuating lever pivotably mounted on the chassis of said tape recorder so as to move said pinch roller away from said capstan and the idler rollers away from the reel tables when the pause push button is depressed, said actuating lever including a rocking confining member consisting of a resilient body, one end of which is positioned to engage the side wall of said first lever to cause said first lever to turn in a given direction through said rocking confining member upon turning of said actuating lever due to depression of said pause push button.
Claim 9
Dependent Claim
33 words
An automatic stop device as set forth in claim 7 wherein said rocking confining member comprises a wire spring and said first lever includes a projection piece positioned to engage said wire spring.
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) | 1978-10-27 | 1979-04-28 | 1979-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-27 | 1983-04-28 | 1983-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-27 | 1987-04-28 | 1987-10-28 | $7700.00 | Window Closed / Lapsed |