SU582524A1 - Tape-driving start-stop - Google Patents

Description

one

The invention relates to the field of instrumentation, in particular to magnetic recording, and may find application in tape mechanisms.

Tape-carrying mechanisms are known, which contain feed and reception coils, pocket-type accumulators, drive shafts, magnetic heads.

These mechanisms are used in cases when it is necessary to store a large amount of information, but for reproducing it takes time (searching for information) to rewind part or all of the tape to another reel (longer access time to information).

Tape mechanisms with a storage medium in the form of a loop, placed in a drive of various designs (lever, box, loop) are used when large amounts of information are not required for storage, therefore, for replaying, the time spent is much less than 1, 2.

The closest to the invention in its technical essence is a mechanism that has two coils - a feed and a receiving, two pocket-type buffer devices, each of which is located in the zone of action of the corresponding coil, two leading

shaft with magnetic knots, magnetic heads 3.

The drive shafts rotate continuously in different directions. the tape starts when it is pressed against the drive shaft with an air flow. The inclusion of this other pressing unit is carried out by a special switchgear that guides

air flow to the drive shaft, which promote the tape.

Consequently, during operation, the tape is moved only in one direction, which limits the number of operating modes.

The mechanism provides the following modes of operation that can be obtained by moving the tape in one (forward or reverse direction): recording; reproduction; recording and playback at the same time; search earlier

recorded information; rewind in forward and reverse directions.

The reels LET keep a tape with recorded information for a long time. However, prompt replay of recorded

Previous information is difficult because it requires pre-rewinding of a part or the whole tape to another reel.

The purpose of the invention is the extension of the functionality of the tape

start-stop mechanism by increasing the number of modes of its operation.

This is achieved by the fact that the proposed tape-starting start-stop mechanism, which contains a feed and take-up reel with a magnetic tape, two buffer devices for pocket tin, two drive shafts with pressure nodes, is equipped with an intermediate storage drive of the magnetic tape and two additional drive shafts with pressure independent nodes.

The drawing shows the relative position of the elements of the tape mechanism.

The tape drive start-stop mechanism contains coils 1 and 2, shafts 3 and 4 located at pocket-type buffer devices 5 and 6, shafts 7 and 8 located at the entrance and exit of intermediate storage device 9, block

10 magnetic heads consisting of recording and reproducing heads, and a block of 11 reproducing heads, devices pressing magnetic tape 12 to the drive shafts, with drives 13-16, devices 17-20, guides and tensioning tape, and a vacuum pump 21.

The magnetic tape 12, which is located on the reel 1, has passed all elements of the ribbon path, is fixed to the reel 2 with its free end. The drive shafts 3, 4, 7 and 8 rotate continuously.

The tape drive mechanism works as follows.

The movement of the magnetic mite begins with the activation of any drive of the pressure unit, which presses the belt to the rotating shaft. As a clamping unit, any known device can be used to ensure the tape is coupled to the shaft (for example, a pinch roller) with a corresponding autonomous drive (for example, an electromagnet).

To obtain the required mode of operation, an autonomous drive (s) of the corresponding clamping device is included. When the drive 15 is turned on, the shaft 8 pulls the magnetic tape past the head unit 10, which simultaneously records and reads information. In this case, the tape enters the intermediate storage device 9 and accumulates there.

If it is necessary to quickly reproduce the previously recorded information, the drive 13 is turned on, and the magnetic tape is driven by the drive shaft 3 from the intermediate storage device 9 past the head unit

11 reproduction. This mode of operation can be combined with pulling the tape past the block of heads 10 with the drive shaft 8.

When the drive 16 is turned on (drive 13 is turned off), the magnetic tape moves past the head block Eve in the opposite direction and feeds it to the intermediate storage device 9.

In this case, the previously recorded information is searched for or reversed. This process can also be combined with a recording process (drive 15 is turned on) or winding onto the roller 1 (drive 14 is turned on).

The vacuum pump 21 creates the necessary vacuum in the pocket-type buffer devices and at the same time, through the guiding devices 17, 18, 19 and 20, provides tension on the magnetic tape at the locations of the blocks of magnetic heads.

Thus, the tape-starting start-stop mechanism provides modes of operation that can be obtained when the tape moves in one direction (forward or reverse), or separate movement in one direction (delay of processes in time) and when moving in two directions at once (towards each other). friend): record; reproduction; recording and playback at the same time; search previously recorded information; rewind in the forward and reverse directions; re-production; reverse playback; repeat playback of previously recorded information simultaneously with recording and replaying a new one; Search for previously recorded information simultaneously with recording and playing a new one; Reverse playback of previously recorded information simultaneously with recording and playback of a new one.

Claims (3)

1. The patent of England No. 876568, cl. 40/2 E, 1970. 2. US patent number 3091380, class. 226-50, 1963. 3. US patent number 3189239, cl. 226-95,1965.