US4035842A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recorded video signal reproducing apparatus capable of reproducing stop motion still pictures
Assignee: Victor Company of Japan Ltd
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Filing: 1975-08-26
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Granted: 1977-07-12
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Expires: 1995-08-26
Abstract
Abstract A reproducing apparatus recorded video signal uses a guide drum having at least one rotating head. A stop motion mechanism automatically loads or lays out a tape from a tape cassette, along a predetermined tape traveling path. A mechanism drives the tape in the predetermined tape traveling path and stops the tape. A mechanism operates the tape in its stopped state to change the shape of the predetermined tape traveling path and the length of the tape in the tape traveling path, thereby to cause a displacement of a part of the tape in wrapping contact with the guide drum. A mechanism controls the operation of the tape displacing mechanism in a manner such that the rotating head rotates and scans the tracks on the stopped tape and carries out the desired reproduction of a still picture.
Inventors
- 👤 Yoshikazu Terao
- 👤 Katsuhisa Muto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:18
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/60; G11B15/66; G11B15/665; G11B15/6653; G11B15/6655; G11B15/61; H; H04; H04N; H04N5/00; H04N5/76; H04N5/78; H04N5/782; H04N5/783
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
261 words
A stop motion video signal reproducing apparatus comprising: a guide drum means having a cylindrical surface and including at least one rotating video head; a tape cassette containing a tape wound upon a tape supply roll and a tape take-up roll with a portion extending between the two rolls, said tape having video signals recorded thereon; automatic loading means for automatically withdrawing the portion of the recording tape extending between said rolls out of the cassette and loading the same in a predetermined helical tape traveling path in the apparatus, said helical path having a pitch angle of inclination with respect to said guide drum, wrapping a part of the tape around the cylindrical surface of the guide drum and over a specific angular extent thereof; driving means for causing the tape thus loaded in the predetermined tape traveling path to travel; stop motion means for stopping the driving means and thereby stopping the travel of the tape, and means for adjusting the pitch angle of inclination of said helical path; displacing means operating while the tape travel is stopped in order to change the length of the tape in the tape traveling path, thereby to cause a forward longitudinal displacement of the part of the tape which is in wrapping contact with the guide drum; and control means for actuating the displacing means in the tape displacing operation in a manner such that the rotating head scans tracks which are recorded on the tape, while the tape is stopped, thereby to afford desirable reproduction of a stop motion still picture.
Claim 2
Dependent Claim
261 words
A stop motion video signal reproducing apparatus comprising: a guide drum means having a cylindrical surface and including at least one rotating video head; a tape cassette containing a tape wound upon a tape supply roll and a tape take-up roll with a portion extending between the two rolls, said tape having video signals recorded thereon; automatic loading means for automatically withdrawing the portion of the recording tape extending between said rolls out of the cassette and loading the same in a predetermined helical tape traveling path in the apparatus, said helical path having a pitch angle of inclination with respect to said guide drum, wrapping a part of the tape around the cylindrical surface of the guide drum and over a specific angular extent thereof; driving means for causing the tape thus loaded in the predetermined tape traveling path to travel; stop motion means for stopping the driving means and thereby stopping the travel of the tape, and means for adjusting the pitch angle of inclination of said helical path; displacing means operating while the tape travel is stopped in order to change the length of the tape in the tape traveling path, thereby to cause a forward longitudinal displacement of the part of the tape which is in wrapping contact with the guide drum; and control means for actuating the displacing means in the tape displacing operation in a manner such that the rotating head scans tracks which are recorded on the tape, while the tape is stopped, thereby to afford desirable reproduction of a stop motion still picture.
Claim 3
Dependent Claim
58 words
A video signal reproducing apparatus as claimed in claim 1 in which the displacing means is one of a plurality of tape guide members for guiding the tape along the predetermined tape traveling path, said displacing means undergoing a displacement responsive to operation of the control actuation means to change the length of the predetermined tape traveling path.
Claim 4
Dependent Claim
88 words
A video signal reproducing apparatus as claimed in claim 2 in which said one tape guide member is mounted on a displaceable member at a position for guiding the tape in the predetermined tape traveling path between the guide drum and the tape take-up roll, the tape length of the predetermined tape traveling path being increased by a certain amount responsive to a displacement of said one tape guide, and a length of tape equal to said amount of increase being paid out from the tape supply roll.
Claim 5
Dependent Claim
146 words
A video signal reproducing apparatus as claimed in claim 2 in which: the tape driving means comprises a capstan rotating positively under power, a pinch roller rotated by being pressed against the capstan with the tape interposed therebetween, and a holding structure for holding the pinch roller in a rotatable state at one end thereof, said holding structure being pivotally supported at the other end thereof, the capstan and the pinch roller operating cooperatively to drive the tape in said travel; the tape stopping means comprising means for causing a displacement and separation of the pinch roller together with the holding structure from the capstan; said one tape guide member being provided on the holding structure; and the actuating control means comprising means for displacing the holding structure in a manner such that said one tape guide member changes the length of the tape traveling path.
Claim 6
Dependent Claim
166 words
A video signal reproducing apparatus as claimed in claim 1 in which said means for altering said pitch angle of inclination comprises a pair of tape guide members for obliquely guiding said part of the tape in wrapping contact along said helical path over the cylindrical surface of the guide drum within the specific angular extent thereof, and means operating interrelatedly with the operation of the stopping means to vary the tape guiding height position due to at least one of the pair of tape guide members in a manner such that the travel of the tape is stopped after the tape guiding height position was varied, the guided height position of the tape being so varied and the pitch angle of inclination of the helical path being so varied that the path scanned by the rotating head at the time when the travel of the tape is stopped assumes substantially the same inclination as the path scanned by the rotating head during the tape travel.
Claim 7
Dependent Claim
87 words
A video signal reproducing apparatus as claimed in claim 1 in which there is further provided means for imparting adjustable back tension to the tape paid out from a tape roll in the tape cassette and for correcting skew distortion in the reproduced picture, and the tape length paid out from the tape supply roll at the time of the variation of the length of the tape traveling path being controlled by a cooperative operation of the skew distortion correcting means and of the tape displaying means.
Claim 8
Dependent Claim
60 words
A video reproducing apparatus as claimed in claim 1 in which a single operation of the actuating control means has additional means for actuating the tape stopping means in two steps, the first of said steps occurring at the time of normal picture reproduction, and the second step occurring after the first step and while the tape travel is stopped.
Claim 9
Dependent Claim
49 words
A video signal reproducing apparatus as claimed in claim 1 which further comprises lock means operating to lock the actuating control means in its unoperated state and to unlock the actuating control means only when the apparatus is carrying out normal reproducing operation with the tape in traveling movement.
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) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |