US3701860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic recording and reproducing apparatus with time control in cartridge
Assignee: Canon Inc
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Filing: 1970-10-20
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Granted: 1972-10-31
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Expires: 1990-10-20
Abstract
Abstract The magnetic recording and reproducing apparatus is provided with timing means which starts the time counting from the leading end of the signals to be recorded on an endless magnetic recording medium and is reset after one rotation of the endless recording medium, so that recording means may be retained in the recording mode during one rotation of the endless recording medium whereby the desired signals or informations may be recorded along the whole length of the endless recording medium during the interval from the setting to the resetting of the timing means. Part of the timing means is included in a tape cartridge.
Inventors
- 👤 Yasutaka Iwawaki
- 👤 Minoru Yoshikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:29
CPC Classifications
G; G11; G11B; G11B15/00; G11B15/675; G11B15/68; G11B15/6895; G11B15/02; G11B15/05; G11B15/06; G11B15/18
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
328 words
A magnetic recording and reproducing apparatus including a cartridge having an endless magnetic recording medium therein, said apparatus comprising a casing; means mounted on said casing for releasably holding said cartridge; recording means for recording signals upon said endless magnetic recording medium during a recording mode when said cartridge is held on Said casing; detecting circuit means for detecting a starting time of said recording signals, and for providing an output signal at said starting time; means for switching said recording means into an operative state to record said recording signals on said recording medium in response to said output signal; timing means connected to said detecting circuit and being set by the output from said detecting circuit and reset after said endless magnetic recording medium moves a predetermined length which is less than one complete rotation; and means connected to said timing means for switching said recording means into an inoperative state at the reset time of said timing means; time setting circuit means disposed in said cartridge and including means providing an analog representation of a desired period between the said setting the resetting times, and connector means having a first portion mounted on said cartridge and connected to said time setting circuit means, and having a second portion connected to said timing means and being mounted on said casing for engaging said first connector means portion to interconnect said time setting circuit means to said timing means when said cartridge is held on said casing, wherein said time setting circuit means is for controlling the period between said set and reset times of said timing means; whereby said time setting circuit means controls the extent of said predetermined length of movement of said recording medium, so that said signals are recorded along the predetermined length of said endless magnetic recording medium and after recording, the recording mode is automatically switched to the mode in which no signal is recorded upon said endless magnetic recording medium.
Claim 2
Dependent Claim
328 words
A magnetic recording and reproducing apparatus including a cartridge having an endless magnetic recording medium therein, said apparatus comprising a casing; means mounted on said casing for releasably holding said cartridge; recording means for recording signals upon said endless magnetic recording medium during a recording mode when said cartridge is held on Said casing; detecting circuit means for detecting a starting time of said recording signals, and for providing an output signal at said starting time; means for switching said recording means into an operative state to record said recording signals on said recording medium in response to said output signal; timing means connected to said detecting circuit and being set by the output from said detecting circuit and reset after said endless magnetic recording medium moves a predetermined length which is less than one complete rotation; and means connected to said timing means for switching said recording means into an inoperative state at the reset time of said timing means; time setting circuit means disposed in said cartridge and including means providing an analog representation of a desired period between the said setting the resetting times, and connector means having a first portion mounted on said cartridge and connected to said time setting circuit means, and having a second portion connected to said timing means and being mounted on said casing for engaging said first connector means portion to interconnect said time setting circuit means to said timing means when said cartridge is held on said casing, wherein said time setting circuit means is for controlling the period between said set and reset times of said timing means; whereby said time setting circuit means controls the extent of said predetermined length of movement of said recording medium, so that said signals are recorded along the predetermined length of said endless magnetic recording medium and after recording, the recording mode is automatically switched to the mode in which no signal is recorded upon said endless magnetic recording medium.
Claim 3
Dependent Claim
54 words
The magnetic recording and reproducing apparatus according to claim 1 wherein said recording means includes a magnetic recording head disposed to face said endless magnetic recording medium and connected to said switching means whereby, at said reset time, said switching means interrupts the application of said signals to be recorded to said magnetic head.
Claim 4
Dependent Claim
71 words
The magnetic recording and reproducing apparatus according to claim 1 wherein said recording means has an erase head and a record head both disposed to face a recording track of said endless magnetic recording medium along the direction of recording; and further comprising an erase current generating source connected to said erase head for supplying an erase current; and a source for supplying said recording signals connected to said record head.
Claim 5
Dependent Claim
51 words
The magnetic recording and reproducing apparatus according to claim 1 wherein said timing means has a time constant circuit including said time setting means, and having a time constant equal to a time required for said endless magnetic recording medium to move said predetermined length which is less than one rotation.
Claim 6
Dependent Claim
83 words
The magnetic recording and reproducing apparatus according to claim 1 wherein said recording means includes an erase head and a record head disposed in opposed relation with said endless magnetic recording tape along its recording direction, means for connecting said erase head to an erase current source through an erase current feed line; said timing means includes a flip-flop which is actuated by the output from said time setting circuit and is connected thereto, said flip-flop is connected to actuate said switching means.
Claim 7
Dependent Claim
63 words
The magnetic recording and reproducing apparatus according to claim 1 wherein said timing means includes a flip-flop circuit having an output terminal connected to said switching means, whereby said flip-flop is actuated by said signals to be recorded so as to actuate said switching means to switch said recording means into said operative state during the period between said set and reset times.
Claim 8
Dependent Claim
45 words
The magnetic recording and reproducing apparatus according to claim 6 wherein said flip-flop circuit comprises a monostable multivibrator, and wherein said time setting circuit means comprises a resistor mountEd in said cartridge and coupled by said connector means to form a portion of said multivibrator.
Claim 9
Dependent Claim
182 words
A magnetic recording and reproducing apparatus including a cartridge having an endless magnetic medium therein characterized by the provision of: recording means for recording information upon said endless magnetic recording medium in the cartridge; time setting means arranged on said cartridge for providing an analog quantity corresponding to the time required for one cycle of said endless medium; detecting means for detecting the said analog quantity; timing means connected to said detecting means for providing an output signal having a time period controlled by the said analog quantity detected by said detecting means, said timing means having an adjustable time setting circuit connected for adjustment by said detecting means and reset after said endless magnetic recording medium makes one rotation, and means operatively connected to said timing means for switching said recording means into an inoperative state after one rotation of said medium, whereby said information is recorded along the whole length of said endless magnetic recording medium and, after recording, the recording mode is automatically switched to the mode in which no signal is recorded upon said endless magnetic recording medium.
Claim 10
Dependent Claim
182 words
A magnetic recording and reproducing apparatus including a cartridge having an endless magnetic medium therein characterized by the provision of: recording means for recording information upon said endless magnetic recording medium in the cartridge; time setting means arranged on said cartridge for providing an analog quantity corresponding to the time required for one cycle of said endless medium; detecting means for detecting the said analog quantity; timing means connected to said detecting means for providing an output signal having a time period controlled by the said analog quantity detected by said detecting means, said timing means having an adjustable time setting circuit connected for adjustment by said detecting means and reset after said endless magnetic recording medium makes one rotation, and means operatively connected to said timing means for switching said recording means into an inoperative state after one rotation of said medium, whereby said information is recorded along the whole length of said endless magnetic recording medium and, after recording, the recording mode is automatically switched to the mode in which no signal is recorded upon said endless magnetic recording medium.
Claim 11
Dependent Claim
68 words
The magnetic recording and reproducing apparatus according to claim 8 wherein said time setting member comprises recesses and ridges formed on the side wall of said cartridge so as to represent a time required for said recording medium housed in said cartridge to make one rotation; and said detecting member detects said recesses and ridges to set a time for said time setting circuit by a mechanical displacement.
Claim 12
Dependent Claim
152 words
The magnetic recording and reproducing apparatus according to claim 8 wherein said recording means includes switching means for switching said recording means to a recording mode in response to a switching signal, said switching means includes a switching signal generating circuit for generating the switching signal in response to actuation of said switching means; and said timing means includes a flip-flop having an output terminal and a reset terminal, an inhibit circuit connected between said reset terminal and said time setting circuit, wherein said output terminal is connected to said first mentioned switching means, said inhibit circuit is actuated at least by either of the output from said switching signal generating circuit or the output from said detecting circuit, thereby interrupting the application of a reset signal to said time setting circuit, preventing switching of said flip-flop, and retaining said recording means in said recording mode through said first mentioned switching means.
Claim 13
Dependent Claim
43 words
The magnetic recording and reproducing apparatus according to claim 10 wherein said timing means includes a logic AND circuit having gate terminals connected to said switching signal generating circuit and said detecting circuit and whose output terminal is connected to said inhibit circuit.
Claim 14
Dependent Claim
98 words
The magnetic recording and reproducing circuit as defined in claim 10 wherein said recording means includes an erase head and a record head disposed in an opposed relation with said recording track of said endless magnetic recording medium along its recording direction; said erase head includes means for electrical connection to an erase current generating source through a feed line for supplying the erase current; said recording head has a feed line for applying said signals to be recorded; and said first mentioned switching means is adapted to disconnect said erase current generating source from said erase head.
Claim 15
Dependent Claim
91 words
The magnetic recording and reproducing apparatus according to claim 10 wherein said timing means includes an inhibit circuit means interconnected between said time setting circuit and said flip-flop to control the conduction and non-conduction of the output from said time setting circuit; said inhibit circuit means having a connection to said signal generating circuit for inhibiting the transmission of its input in response to the output of said switching signal generating circuit; whereby during the time said recording means is actuated said flip-flop maintains said switching means in a deactuated state.
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) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |