US4009846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tape recorder drive system
Assignee: Individual
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Filing: 1975-06-27
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Granted: 1977-03-01
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Expires: 1995-06-27
Abstract
Abstract The invention relates to a drive for magnetic tapes, wherein the tape is driven in the fast rewind and fast forward modes off a reversible electric motor which is concurrently and constantly connected to two spindles wherearound the tape coils and decoils, and wherein a means is provided for automatically engaging for rotation the electric motor with that spindle which rotates in a direction such as to wind up the tape, and a friction clutch device which in the recording and playing modes compensates for the differential between the tape speed and the spindle speed as driven by the electric motor, whereas in the fast forward mode it locks automatically.
Inventors
- 👤 Orlando Coruzzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:08
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/18; G11B15/46; G11B15/50; F; F16; F16D; F16D41/00; F16D41/18; Y; Y10; Y10T; Y10T74/00; Y10T74/19; Y10T74/19023
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
205 words
In a drive, particularly for use with magnetic tapes in small size recorders, with a recorder frame, a capstan member which drives the magnetic tape in the recording and playing modes of the recorder, pulleys, a reversible electric motor and drive belts continuously connecting said reversible motor to said pulleys and to said capstan member: a pair of shafts supported by said recorder frame, two spindles wherearound the magnetic tape coils and decoils, said shafts being pivotally connected with said spindles to allow selectively free idle rotation of said shafts with respect to said spindles, said pulleys fixedly connected to said shafts, ; means engaging for rotation each of said shafts with a respective one of said spindles when said respective spindle rotates in the same direction as the tape being wound around said respective spindle, and a friction clutch device arranged between said respective spindle wherearound the tape is wound in the recording and playing modes and said means for engaging said respective spindle to its respective shaft, said clutch device having locking members adapted to prevent the free idle rotatory relationship between said respective spindle and its respective shaft when said respective spindle is rotated faster for a quick winding of the tape.
Claim 2
Dependent Claim
205 words
In a drive, particularly for use with magnetic tapes in small size recorders, with a recorder frame, a capstan member which drives the magnetic tape in the recording and playing modes of the recorder, pulleys, a reversible electric motor and drive belts continuously connecting said reversible motor to said pulleys and to said capstan member: a pair of shafts supported by said recorder frame, two spindles wherearound the magnetic tape coils and decoils, said shafts being pivotally connected with said spindles to allow selectively free idle rotation of said shafts with respect to said spindles, said pulleys fixedly connected to said shafts, ; means engaging for rotation each of said shafts with a respective one of said spindles when said respective spindle rotates in the same direction as the tape being wound around said respective spindle, and a friction clutch device arranged between said respective spindle wherearound the tape is wound in the recording and playing modes and said means for engaging said respective spindle to its respective shaft, said clutch device having locking members adapted to prevent the free idle rotatory relationship between said respective spindle and its respective shaft when said respective spindle is rotated faster for a quick winding of the tape.
Claim 3
Dependent Claim
104 words
A drive according to claim 1, wherein said means engaging for rotation each of said shafts with a respective one of said spindles, comprise at each spindle, camming means, a locking tooth rotating integrally with said shaft and engageable with said camming means and with said spindle but providing an angular play with respect thereto, a friction member between said camming means and the recorder frame, said camming means being displaced angularly in a direction opposite to the direction of rotation of said shaft under the influence of said friction member tending to retain said camming means with respect to the recorder main frame.
Claim 4
Dependent Claim
107 words
A drive according to claim 2, wherein said spindles have a bottom portion having notches and teeth formations projecting therefrom and wherein said locking tooth is radially shiftable with respect to said respective spindle and camming means so that the engagement of each locking tooth with said respective spindle is effected by inserting said locking tooth between said teeth formations, said camming means and said angular play defined by said camming means with respect to said shaft being sized such as to permit full insertion or withdrawal of said locking tooth into and from said notches or teeth depending on said angular displacement of said camming means.
Claim 5
Dependent Claim
52 words
A drive according to claim 1, wherein said locking members of said clutch device comprise at least one radially movable element and spring means biasing the centrifugal force acting on said movable element during rotation of said clutch device, the radial displacement of said element determining the locking of said clutch device.
Claim 6
Dependent Claim
145 words
A drive according to claim 1, wherein said clutch device comprises: an upper disc integral for rotation with an upper portion of said spindle; a lower disc integral with a lower portion of said spindle, said lower spindle portion being connected to said means engaging for rotation said shafts with said spindle, a friction plate arranged between said upper disc and said lower disc; and locking members comprising a movable pin in a radial direction spring means biasing said pin in the direction of motion thereof and engaged on one side with said pin and on the other side with one of said discs, and at least one detent member integral with the other disc and adapted to interfere laterally with said pin when the latter is urged radially outwards under the influence of the centrifugal force created by the quick rotation of said spindle.
Claim 7
Dependent Claim
64 words
A drive according to claim 5, wherein said upper portion of said spindle has a seat in which said pin is partially inserted , and said detent member is a block projecting in a radial direction from an inner face of a rim integral with said lower portion of said spindle said rim limiting the radial stroke of said pin in a centrifugal direction.
Claim 8
Dependent Claim
26 words
A drive according to claim 5, wherein said flexible means is a resilient reed flexing under the action of the centrifugal force acting on said pin.
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) | 1980-02-29 | 1980-08-30 | 1981-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-29 | 1984-08-30 | 1985-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-29 | 1988-08-30 | 1989-03-01 | $7700.00 | Window Closed / Lapsed |