US3582569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selecting apparatus for the reproduction of multitrack magnetic tapes
Assignee: Individual
•
Filing: 1967-08-24
•
Granted: 1971-06-01
•
Expires: 1987-08-24
Abstract
Abstract Reading heads for the reproduction of multitrack magnetic tapes in cassettes are controlled by keys which cause recordings on the playback tracks to be sent to playback amplifiers whereas signals on identification tracks are sent to an amplifier which controls a rapid search device to initiate normal playback at proper speed when the signal produced by he the depressed correlates with an indentification signal on the tape.
Inventors
- 👤 Marcel Jules Helene Staar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:06
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/005; G11B15/02; G11B15/05; G11B15/06; G11B15/18; G11B15/44; G11B15/442; G11B27/00; G11B27/10; G11B27/19; G11B27/28; G11B27/32; G11B27/322
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
256 words
Apparatus for reproducing a multitrack magnetic tape in ordinary and selector-type cassettes being constituted of sound tracks bearing sound recordings separated by nonsound intervals, and a signal track bearing signals at intervals corresponding to the nonsound intervals in said sound tracks, said signals being constituted of first signals for moving the tape at rapid speed, and second signals for identification and moving the tape at normal playback speed, said first signals preceding said second signals, said apparatus comprising reading means for reading the sound recordings of said sound tracks, and selector means operatively associated with said sound and signal tracks for selecting a particular recording to be played back, said selector means comprising electronic circuit means comprising electronic circuit means, a plurality of keys operatively associated with said electronic circuit means for signaling selected recordings, at least one playback amplifier coupled with said keys and said sound track for playback at the normal playback speed, a further amplifier coupled with said keys and said signal track, and rapid search means comprising drive means coupled with said further amplifier to be controlled by said signals to move said tape at rapid speed in locating selected recording and to bring said tape to normal playback speed upon agreement between the recording requested by a selected key and a group of said second signals in said signal track, said reading means being adapted for reading a recording track of an ordinary cassette corresponding in position to that of said signal track of said signal track of a selectortype cassette.
Claim 2
Dependent Claim
256 words
Apparatus for reproducing a multitrack magnetic tape in ordinary and selector-type cassettes being constituted of sound tracks bearing sound recordings separated by nonsound intervals, and a signal track bearing signals at intervals corresponding to the nonsound intervals in said sound tracks, said signals being constituted of first signals for moving the tape at rapid speed, and second signals for identification and moving the tape at normal playback speed, said first signals preceding said second signals, said apparatus comprising reading means for reading the sound recordings of said sound tracks, and selector means operatively associated with said sound and signal tracks for selecting a particular recording to be played back, said selector means comprising electronic circuit means comprising electronic circuit means, a plurality of keys operatively associated with said electronic circuit means for signaling selected recordings, at least one playback amplifier coupled with said keys and said sound track for playback at the normal playback speed, a further amplifier coupled with said keys and said signal track, and rapid search means comprising drive means coupled with said further amplifier to be controlled by said signals to move said tape at rapid speed in locating selected recording and to bring said tape to normal playback speed upon agreement between the recording requested by a selected key and a group of said second signals in said signal track, said reading means being adapted for reading a recording track of an ordinary cassette corresponding in position to that of said signal track of said signal track of a selectortype cassette.
Claim 3
Dependent Claim
135 words
Apparatus as claimed in claim 1, wherein said selector-type cassettes include bosses projecting therefrom, said apparatus further including an inverter member engageable by said bosses and coupled with said selector means such that when a selector-type cassette is introduced said bosses act to displace said inverter member to cause said sound recordings to pass directly to said playback amplifier and said signals to said electronic circuit, and when an ordinary cassette is introduced said inverter member remains in position to cause the sound track recording corresponding in position to that of the signal track of the selector-type cassette to pass to said playback amplifiErs, and locking means for locking said keys in position when an ordinary cassette is introduced, the selector-type cassettes including further bosses for engaging said locking means to displace and unlock same.
Claim 4
Dependent Claim
91 words
Apparatus according to claim 1 including a manual inverter operatively associated with said selector means so that when an ordinary cassette is used, the inverter remains in a position in which the sound recordings of sound tracks of the ordinary cassette tape are sent to each playback amplifier, whereas when the cassette is of the selector type, the inverter is brought into a different position, which enables the sound recordings to be sent directly to each sound amplifier, while the signals of the signal track are sent to the electronic circuit.
Claim 5
Dependent Claim
115 words
Apparatus according to claim 1, in which the selector means comprises at least one key extending through a bar borne by transverse members, and extending parallel to the bar is a sliding rod on the side of the keys with teeth equal in number to the number of the keys, the teeth constituting a stop for the movement of the key when the cassette is of the ordinary type, and when the cassette is of the selector type the teeth are brought by the sliding of the rod into a position in which it is possible to push in the keys to make a selection, the rod being slid by bosses borne by the cassette.
Claim 6
Dependent Claim
68 words
Apparatus according to claim 4 in which the movement of the sliding rod is controlled by a lever pivoting in relation to the bosses on the cassette, and approximately at its center the sliding rod bears a tenon engaging in a fork constituting part of a lever which can pivot around a spindle borne by the casing, the lever pivoting in relation to the bosses on the cassette.
Claim 7
Dependent Claim
67 words
Apparatus according to claim 1 comprising a relay including an armature connected to two couplings one of which is connected to a U-shaped member bearing a pressure roller, the other coupling being in connection with a lever bearing a wheel which can be brought into contact with and entrain one of a number of pulleys bearing a nucleus cooperating with spools for winding and unwinding the tape.
Claim 8
Dependent Claim
46 words
Apparatus according to claim 6, in which a first magnetic signal located on the signal track before the identification signals gives information of the end of the preceding recording and the beginning of another recording and therefore gives information of the speeding up of the tape.
Claim 9
Dependent Claim
31 words
Apparatus according to claim 6, in which one of the tracks comprises only magnetic signals giving indications as regards the identification and the relative position of recordings provided on other tracks.
Claim 10
Dependent Claim
29 words
Apparatus according to claim 8 wherein the information indicating the conclusion of a recording and the start of another recording indicates that the following information will be identification information.
Claim 11
Dependent Claim
88 words
Apparatus according to claim 9, in which the electronic circuit is so constructed and combined with the tracks or recordings or signals such that for a purpose of counting, two signals or tops following one another must move between the minimum and maximum time, and if these standards are not respected, the signal is not interpreted as a counting signal, and the electronic circuit can be returned to zero to start a further counting, whose tops must again fall within the standards if they are to be interpreted.
Claim 12
Dependent Claim
95 words
Apparatus according to claim 10, in which when a starting button and a selector button have been operated, an electromagnet which has been energized acts on the armature and exerts a pull on the coupling members such that: a. the pressure roller forcing the magnetic tape against the capstan withdraws and releases the tape; b. a pull is exerted on the lever bearing the spindle driving the pulley and releases the pulley, which is then driven at high speed by the pulley borne by the lever which has been moved by the associated coupling member.
Claim 13
Dependent Claim
76 words
Apparatus according to claim 11, in which the bosses for unlocKing the keys are of different heights and are disposed in diagonally opposite positions on a small front surface of the cassette when the cassette is of the selector type, thus providing means for informing the user of the side of the tape which is being used, this being done by the bosses acting in a different manner on a small indicator plate showing different indications.
Claim 14
Dependent Claim
74 words
Apparatus according to claim 12, wherein the selector keys act on switches, each key when pushed in closing the switch corresponding to the numbers chosen, while the electronic circuit on the electromagnet which makes the tape move rapidly when searching for the recording, and makes it move at normal speed for playback, as soon as there is agreement between a group of identification signals and the number of the recording selected by the keys.
Claim 15
Dependent Claim
97 words
Apparatus according to claim 13 wherein the pulses captured by a signals head pass through a reading amplifier to control, via the electronic circuit and the power amplifier, the electromagnet which is used for making the tape move at rapid speed as soon as the signals head has captured a signal top and ceases to be operational and returns the apparatus to its normal playback speed as soon as the signals head captures a group of identification pulses corresponding to one of the keys pushed in, namely to the number of the switch closed by a key.
Claim 16
Dependent Claim
43 words
Apparatus according to claim 14, wherein when the apparatus operates at rapid tape speed, the output of a playback head is short circuited so as not to transmit the noise produced by the excessively fast movement of a recording during the searching period.
Claim 17
Dependent Claim
51 words
Apparatus according to claim 15, wherein the electronic circuit interprets the identification signals as an actual counting only if the spacing between two of these signals falls within well-defined time standards, so that parasite signals have less chance of falling within these narrow limits and being wrongly interpreted as counting signals.
Claim 18
Dependent Claim
48 words
Apparatus according to claim 16, comprising a manual inverter which has the same influence on the electronic circuit as a top for enabling the apparatus to be put into a condition of rapid search for the next number selected and the end of the tape at any time.
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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |