SU67796A1 - Endless tape cassette (or wire) - Google Patents

Description

The present invention relates to an endless tape cassette (or wire) used for magnetic recording and reproduction of sound and arranged in a spiral around a central driving drum.

According to the invention, two systems of rotary rollers — axial, mounted around the drum for winding and moving the spiral skein of the tape, and paired radial ones — are used to hold this skein between them. The axial rollers are connected with a central leading drum.

The invention is explained in the diagram.

On the basis of L are eight pairs of radial rollers B. In each pair, one roller is above the other with a gap between them, respectively, the width of the belt B. Between the rollers there is a spiral coil of ribbon B. The inner coil of the coil covers eight axial rollers G. These rollers are equipped with side slipping tape. A system of said axial and radial rollers forms a nest for placing a roll of ribbon in it, which is driven by a driving drum D located in the center. The rotation is transmitted to the drum from the motor E

through the gearbox. A mechanical vibration filter (flexible coupling and flywheel) can be used to increase the uniformity of rotation. A cassette located on a common base can be removed from the apparatus, and in its place another cassette fitted, equipped with all the elements of the socket and tape. The following tape drive circuit, the inner turn of the coil, skirt roller J, passes over the lead drum D to the upper section of the roller 4. This roller is double (as well as rollers 2 and 3): above, the lower roller, which is an element nest, is another one of the same top roller. Next, the tape passes over the skein and, after scrolling the roller 15, first enters the erasing head W and then into the recording head 3. These heads can be constructively combined. The recording head 3 can also be used for playback purposes. Through the roller 14 and the upper section of the double roller 3, the tape enters the driving drum D, which is pressed by means of a pressure roller or by other means. Then, having rounded the upper section of the double roller 2, the tape passes over the skein and with the help of the bending roller JO with an inclined axis and the input roller 9 enters the slot again. Rollers //, 12 and 13 are

limiters that prevent the tape from slipping in the event of a significant weakening of the belt. The roller .5 may move along the radius of the base L, thereby changing the belt tension.

Various modifications of the described device are possible. For example, the plane of the lead drum may be located above the plane of the skein, and not lower, as shown in the diagram. The belt can be tensioned by moving a group of rollers as well as by other means. Can be changed and, in particular, reduced the number of rollers. Various modifications of the device described are possible with respect to the placement of the leading drum and heads; for example, the heads and the drum may be interchanged. The heads and the drum may also be moved out of the socket: they may not be located on a common base, etc. A variant of the device is possible in which the electric motor drives the driving drum while the cassette is placed to the side of the apparatus and to change the cassette, it is necessary to remove the loop of the tape that goes around the drive drum, which is always connected to the apparatus. These and a number of other modifications of the proposed principle may be appropriate for some applications and exploitation conditions.

In the described construction, the tape can be pulled through the heads in only one direction. When the direction of rotation of the leading drum is reversed, the outer turn will be drawn by the leading drum into the cassette, and the coil will be tightened, but will not be pulled through the tape heads in the opposite direction. In order to ensure two-sided belt movement, it is necessary to forcibly connect the rotation of the leading drum to the rotation of the axial rollers G. For this purpose, toothed ticks are attached to the axes of the rollers, which are coupled with the bristles on the drum axis. The entire system of bristles is placed above the base at the bottom of the cassette. When the drum rotates backward, the axial rollers also begin to rotate in the opposite direction. Therefore, the entire coil of the ribbon begins to rotate clockwise, and the inner coil is drawn into the inside of the cassette, with the ribbon being drawn through the heads in the direction opposite to the normal one. The rewind of the tape cannot be long since the hank will soon slow down, but the rewinding of 1-2 meters of the tape is quite possible.

The clutch of the leading drum with axial rollers can be carried out in various other ways. In addition, it is possible to rotate the radial rollers.

Subject invention

Claims (2)

I. Cassette for an endless belt (or wire) used for magnetic recording and reproduction of sound and arranged in a spiral around a central driving drum, characterized by the use of two systems of rotating rollers: axial, mounted around the drum for winding and moving a spiral skein of a tape, and paired radial to keep this skein between them. 2. A cassette embodiment according to claim I, characterized in that the axial rollers are connected by gears with a central drive drum. It is necessary to 1schchenie we weigh the axial targets on the gears with the theme of shesivaniem ri riv reverse: sial raschats: avlenii. starts a hot-water bottle, and: inside the givyeni ) IT IS POSSIBLE other ki and ribbons; l magvedi pirales about baramenerennyi ani and kale n x for the skein, this : M that lecrepbara