Automatic record control apparatus with multichannel memory

• US 4,005,483 A
• Filed: 11/15/1974
• Issued: 01/25/1977
• Est. Priority Date: 11/19/1973
• Status: Expired due to Term

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Kuwano, Takeshi
• Primary Examiner(s): Konick, Bernard
• Assistant Examiner(s): Faber, Alan
• Application Number:
  US05/524,273
• Time in Patent Office: 802 Days
• Field of Search: 360/10, 360/35, 360/63, 360/60, 360/78, 360/74, 360/69, 360/33, 178/DIG. 1, 346/107 B
• US Class Current: 360/69
• CPC Class Codes: G11B 2220/20 Disc-shaped record carriers
• CPC Class Codes: G11B 27/105 of operating discs
• CPC Class Codes: G11B 27/13 the information being derived from movement of the record carrier, e.g. using tachometer
• CPC Class Codes: G11B 27/30 on the same track as the main recording
• CPC Class Codes: H04N 5/781 on disks or drums

Abstract

An automatic record control apparatus is disclosed in which multichannel tracks of a rotary magnetic recording medium are endlessly traced one track-by-one track in response to pulses associated with vertical synchronizing pulses of a video signal. With the closing of a recording switch, the video signal is recorded in the tracks being traced, and the number of the recording tracks to be recorded are limited to a predetermined number from the instant of detection of a signal associated with a motion of an object to be recorded by counting the number of the signal, the recording operation being automatically stopped after coverage of predetermined number of tracks.

Claims

1. An automatic record control apparatus for a multichannel memory comprising:

a magnetic recording medium having multichannel tracks;

first means for recording video signals in said multichannel tracks one-track by one-track endlessly in such a manner that the track to be recorded is changed from one track to the next and returned to the first track from the last track from sequentially recording said video signals in a track-by-track fashion in response to pulses associated with vertical synchronizing pulses for said video signals, the period of said pulses associated with the vertical synchronizing pulses being selected so as to record all of the desired video signals of said video signals in said multichannel tracks;

a trigger signal detector;

an amplifier for amplifying said trigger signal detected by said trigger signal detector into a predetermined level;

a gating device for passing said pulses associated with said vertical synchronizing signal from the instant of detecting said trigger signal;

a counter circuit for counting a predetermined even number of said pulses associated with said vertical synchronizing pulses, said counter circuit producing a first potential indicative of half of said even number when said half of said even number is reached, said counter circuit producing a second potential indicative of said predetermined even number when said predetermined even number is reached, said second potential being different from said first potential; and

a control circuit including a resistor and a capacitor, said capacitor being charged with said first potential when said first potential is produced, said capacitor being discharged through said resistor when said second potential is produced, the recording in said multichannel being stopped at time of said discharge.

2. An automatic record control apparatus for a multichannel memory comprising:

p1 a magnetic recording medium having multichannel tracks;

first means for recording video signals in said multichannel tracks one-track by one-track endlessly in such a manner that the track to be recorded is changed from one track to the next and returned to the first from the last track from sequentially recording said video signals in a track-by-track fashion in response to pulses associated with vertical synchronizing pulses for said video signals, the period of said pulses associated with the vertical synchronizing pulses being selected so as to record all of the desired video signals of said video signals in said multichannel tracks, said first means including a recording switch and a hold circuit consisting of a bistable multivibrator being switched from one stable state to the other stable state for holding a recording state when said recording switch is changed over to the normally open side;

a trigger signal detector;

an amplifier for amplifying said trigger signal detected by said trigger signal detector into a predetermined level;

a gate device for passing said pulses associated with said vertical synchronizing signal from the instant of detection of said trigger signal by said amplifier, a counter circuit for counting a predetermined even number of said pulses associated with said vertical synchronizing pulses, said counter circuit producing a first potential indicative of half of said even number when said half of said even number is reached, said counter circuit producing a second potential indicative of said predetermined even number when said predetermined even number is reached, said second potential being different from said first potential; and

a control circuit including a resistor and a capacitor, said capacitor being charged with said first potential when said first potential is produced, said capacitor being discharged through said resistor when said second potential is produced, said bistable multivibrator being switched back from one stable state to the other stable state by said discharge of said capacitor thereby to stop the recording in said multichannel tracks.

3. An automatic record control apparatus for a multichannel memory comprising:

a magnetic recording medium having multichannel tracks;

first means for recording video signals in said multichannel tracks one-track by one-track endlessly in such a manner that the track to be recorded is changed from one track to the next and returned to the first track from the last track for sequentially recording said video signals in a track-by-track fashion in response to pulses associated with vertical synchronizing pulses for said video signals, the period of said pulses associated with the vertical synchronizing pulses being selected so as to record all of the desired video signals of said video signals in said multichannel tracks;

a trigger signal detector; and

second means for stopping the recording operation of said first means in said multichannel tracks in response to a trigger signal detected by said trigger detector, said recording operation being stopped immediately after the completion of the recording of said desired video signals operated by said first means;

thereby said desired video signals being recorded in said multichannel tracks without being erased;

said second means comprising an amplifier for amplifying said trigger signal detected by said trigger signal detector into a predetermined level, a gating device for passing said pulse associated with said vertical synchronizing signal from the instant of detecting said trigger signal, a counter circuit for counting a predetermined number of pulses associated with said vertical synchronizing signals which are applied from said gating device, and a control circuit for casusing said first means to stop the recording in said multichannel tracks when said predetermined number is reached by the counts of said counter circuit;

said counter circuit counting a predetermined even number of said pulses associated with said vertical synchronizing pulses, said counter circuit producing a first potential indicative of half of said even number when said half of said even number is reached, said counter cirucit producing a second potential indicative of said predetermined even number when said predetermined even number is reached, said second potential being different from said potential;

said control circuit including a resistor and a capacitor, said capacitor being charged with said first potential when said first potential is produced, said capacitor being discharged through said resistor when said second potential is produced, the recording in said multichannel being stopped at the time of said discharge.

4. An automatic record control apparatus for a multichannel memory comprising:

a magnetic recording medium having multichannel tracks;

first means for recording video signals in said multichannel tracks one-track by one-track endless in such a manner that the track to be recorded is changed from one track to the next and returned to the first track from the last track for sequentially recording said video signals in a track-by-track fashion in response to pulses associated with vertical synchronizing pulses for said video signals, the period of said pulses associated with the vertical synchronizing pulses being selected so as to record all of the desired video signals of said video signals in said multichannel tracks;

a trigger signal detector; and

second means for stopping the recording operation of said first means in said multichannel tracks in response to a trigger signal detected by said trigger signal detector, said recording operation being stopped immediately after the completion of the recording of said desired video signals operated by said first means;

thereby said desired video signals being recorded in said multichannel tracks without being erased;

said first means including a recording switch and a hold circuit consisting of a bistable multivibrator, the multivibrator being switched from one stable state to the other stable state for holding a recording state when said recording switch is changed over to the normally open side;

said second means comprising and amplifier for amplifying said trigger signal detector by said trigger signal detector into a predetermined level;

a gate device for passing said pulses associated with said vertical synchronizing signal from the instant of detection of said trigger signal by said amplifier;

a counter circuit for counting a predetermined even number of said pulses associated with said vertical synchronizing pulses, said counter circuit producing a first potential indicative of half of said even number when said half of said even number is reached, said counter circuit producing a second potential indicative of said predetermined even number when said predetermined even number is reached, said second potential being different from said first potential; and

a control circuit including a resistor and a capacitor, said capacitor being charged with said first potential when said first potential is produced, said capacitor being discharged through said resistor when said second potential is produced, said bistable multivibrator being switched back from one stable state to the other stable state by said discharge of said capacitor thereby to stop the recording in said multichannel tracks. pg,27

5. An automatic record control apparatus comprising:

a magnetic recording medium having multichannel tracks;

a record switch having two positions, namely a normally closed side and a normally open side;

a bistable multivibrator being switched from one stable state to the other stable state upon the changing-over of said record switch from said normally closed side to said normally open side;

second means for recording video signals in said multichannel tracks one-track by one-track endlessly in such a manner that the track to be recorded is changed from one track to the next track and returned to the first track from the last track for sequentially recording said video signals in a track-by-track fashion in response to pulses associated with the vertical synchronizing pulses for said video signals, the period of said pulses associated with said vertical synchronizing pulses being selected so as to record all of the desired portions of said video signals in said multichannel tracks, and said second means being allowed to record said video signals upon the switching of said multivibrator to said normally open side from said normally closed side;

a trigger signal detector for detectng a trigger signal;

an amplifying means for amplifying the detected trigger signal to a predetermined level;

a gate means including at least one NAND gate and adapted to be immediately opened in response to the amplified trigger signal to thereby enable said pulses associated with said vertical synchronizing pulses to pass therethrough;

a counter circuit including a plurality of JK flipflops for counting a predetermined number of the delivered pulses, said counter circuit producing a first potential when the counter number reaches the specified number which is less than half of the number of said multichannel tracks and said counter circuit producing a second potential when said counted number reaches twice the said specified number;

a control circuit comprising a resistor and a capacitor, said capacitor being charged to said first potential upon the production of said first voltage by said counter circuit and discharging the charge produced by said first potential through said resistor upon the production of said second potential by said counter circuit, and said bistable multivibrator being switched back to one said stable state from the other said stable state upon the discharge of said capacitor to thereby cause said second means stop the recording in said multichannel tracks.

6. An automatic record control apparatus according to claim 5, in which said multichannel tracks comprise 15 tracks, said pulses associated with said vertical synchronizing pulses having a period of 1/15 second, said desired video signals being those signals recorded during one'"'"'s action of swinging a golf club, and the number of said plurality of JK flip-flops being three.

7. An automatic record control apparatus according to claim 5, in which said gate means includes a first NAND gate connected to said amplifying means and adapted to be opened upon the switching of said bistable multivibrator to said other stable state from said one stable state to thereby enable said amplified trigger signal to pass therethrough, an RS flip-flop connected to said first NAND gate and adapted to hold said amplified trigger signal delivered from said first NAND gate upon the switching of said bisable multivibrator to said other stable state, and a second NAND gate connected to said RS flip-flop and adapted to be opened in response to the output of said RS flip-flop to thereby enable said pulses associated with said vertical synchronizing pulses to pass therethrough, thereby said RS flip-flop being switched to thereby close said second NAND gate and simultaneously said first NAND gate being closed upon the switching of said bistable multivibrator to said one stable state from said other stable state;

and in which said counter circuit further includes a third NAND gate connected to said RS flip-flop and adapted to clear said plurality of JK flip-flops upon the switching of said RS flip-flop.