US3930269A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cassette tape deck with tape tensioning
Assignee: Teac Corp
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Filing: 1974-05-06
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Granted: 1975-12-30
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Expires: 1994-05-06
Abstract
Abstract A cassette tape deck for use with a tape cassette having a magnetic tape wound on reels in a casing, which is designed to record signals on the tape or reproduce them therefrom based upon loading of the cassette, and in which at least one guide pin having slidably mounted thereon a sliding member biased toward the upper end of the guide pin and the sliding member has formed therein a groove or aperture extending perpendicular to the sliding direction thereof and has associated therewith a movable member biased toward the guide pin, whereby when the cassette has been loaded on the tape deck at a predetermined position, the groove or aperture of the sliding member receives the movable member to detect the loading of the cassette at the predetermined position and actuation of tape driving means is allowed based upon the detection of the loading of the cassette; in which left and right braking members attached to a lever associated with left and right actuating levers for urging left and right pinch rollers into rotary contact with left and right capstans with the tape being gripped therebetween respectively and for pressing the magnetic head against the tape is selectively brought into contact with left and right wheels mounted on left and right reel shafts, whereby the tape is driven across the magnetic head while being subjected to required back tension; and in which the tape is driven to the right (or left) under such conditions that left and right pinch rollers are held in rotary contact with left and right capstans with the tape being gripped therebetween respectively and the contact pressure of the left (or right) pinch roller to the left (or right) capstan is held lower than that of the right (or left) pinch roller to the right (or left) capstan, whereby the tape is driven across the magnetic head while being subjected to required back tension.
Inventors
- 👤 Yasuhiro Uemura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:47
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/22; G11B15/1883; G11B15/43; G11B15/675
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
582 words
A cassette tape deck for use with a cassette having a magnetic tape wound on a first and second reel having central apertures respectively in a casing, the casing having a first major face having formed therein at least a first and second capstan receiving aperture and a first and second reel drive shaft receiving aperture and a second major face having formed therein at least a magnetic head receiving window and a first and second pinch roller receiving window and being substantially perpendicular to the first major face, comprising a first and second capstans inserted into the first and second capstan receiving apertures, a first and second pinch roller making rotary contact with the first and second capstan through the first and second pinch roller receiving windows, a magnetic head making contact with the magnetic tape through the magnetic head receiving window, a first and a second reel drive shaft inserted into the first and second reel drive shaft receiving apertures, a movable member having mounted thereon the magnetic head, and a first and a second actuating lever movable for actuating the movable member to urge the magnetic head against the magnetic tape, the first and second pinch rollers being pivoted to first and second pins on the free end of first and second rotary arms journalled to first and second shafts, respectively, the first and second rotary arms are biased by first and second springs respectively and having pivoted thereto third and fourth rotary arms respectively, the third and fourth rotary arms being biased by third and fourth springs respectively towards thE first and second rotary arms, the movable means having provided thereon first and second engaging pieces for abuttment with the third and fourth rotary arms respectively, the first and second actuating levers carrying thereon first and second actuating pieces for abuttment with the third and fourth rotary arms respectively, in which, based upon the actuation of the first actuating lever to actuate the movable means to urge the magnetic head against the magnetic tape, the third rotary arm is rotated by the first actuating piece against the third spring and then the first rotary arm is rotated through the third spring against the first spring to bring the first pinch roller into rotary contact with the first capstan, and the fourth rotary arm is rotated by the second engaging piece against the fourth spring through the movable means and then the second rotary arm is rotated by the fourth spring against the second spring to bring the second pinch roller into rotary contact with the second capstan with the contact pressure lower than that of the first pinch roller to the first capstan; and in which, based upon the actuation of the second actuating lever to actuate the movable means to urge the magnetic head against the magnetic tape, the fourth rotary arm is rotated by the second actuating piece against the fourth spring and then the second rotary arm is rotated through the fourth spring against the second spring to bring the second pinch roller into rotary contact with the second capstan, and the third rotary arm is rotated by the first engaging piece against the third spring through the movable means and then the first rotary arm is rotated by the third spring against the first spring to bring the first pinch roller into rotary contact with the first capstan with the contact pressure lower than that of the second pinch roller to the second capstan.
Claim 2
Dependent Claim
582 words
A cassette tape deck for use with a cassette having a magnetic tape wound on a first and second reel having central apertures respectively in a casing, the casing having a first major face having formed therein at least a first and second capstan receiving aperture and a first and second reel drive shaft receiving aperture and a second major face having formed therein at least a magnetic head receiving window and a first and second pinch roller receiving window and being substantially perpendicular to the first major face, comprising a first and second capstans inserted into the first and second capstan receiving apertures, a first and second pinch roller making rotary contact with the first and second capstan through the first and second pinch roller receiving windows, a magnetic head making contact with the magnetic tape through the magnetic head receiving window, a first and a second reel drive shaft inserted into the first and second reel drive shaft receiving apertures, a movable member having mounted thereon the magnetic head, and a first and a second actuating lever movable for actuating the movable member to urge the magnetic head against the magnetic tape, the first and second pinch rollers being pivoted to first and second pins on the free end of first and second rotary arms journalled to first and second shafts, respectively, the first and second rotary arms are biased by first and second springs respectively and having pivoted thereto third and fourth rotary arms respectively, the third and fourth rotary arms being biased by third and fourth springs respectively towards thE first and second rotary arms, the movable means having provided thereon first and second engaging pieces for abuttment with the third and fourth rotary arms respectively, the first and second actuating levers carrying thereon first and second actuating pieces for abuttment with the third and fourth rotary arms respectively, in which, based upon the actuation of the first actuating lever to actuate the movable means to urge the magnetic head against the magnetic tape, the third rotary arm is rotated by the first actuating piece against the third spring and then the first rotary arm is rotated through the third spring against the first spring to bring the first pinch roller into rotary contact with the first capstan, and the fourth rotary arm is rotated by the second engaging piece against the fourth spring through the movable means and then the second rotary arm is rotated by the fourth spring against the second spring to bring the second pinch roller into rotary contact with the second capstan with the contact pressure lower than that of the first pinch roller to the first capstan; and in which, based upon the actuation of the second actuating lever to actuate the movable means to urge the magnetic head against the magnetic tape, the fourth rotary arm is rotated by the second actuating piece against the fourth spring and then the second rotary arm is rotated through the fourth spring against the second spring to bring the second pinch roller into rotary contact with the second capstan, and the third rotary arm is rotated by the first engaging piece against the third spring through the movable means and then the first rotary arm is rotated by the third spring against the first spring to bring the first pinch roller into rotary contact with the first capstan with the contact pressure lower than that of the second pinch roller to the second capstan.
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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) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |