SU461518A3 - Device to play the recorded signal - Google Patents

Description

(54) DEVICE TO PLAY A RECORDED SIGNAL

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The invention relates to accumulators of information, namely, devices for reproducing a recorded signal, and can be used for reproducing a television signal recorded on a video plate.

A known device of similar purpose containing an electromechanical pressure transducer rigidly connected to a skid mounted to mate with at least two ridges simultaneously exerting pressure on the elastically deformable protrusions of the modulated groove of the recording medium, and the holder does not allow the reproduction of the recorded signal from fairly short wavelength.

The purpose of the invention is to reduce the wavelength of the reproduced signal.

For this, the proposed device is provided with an elastic element mounted between an electromechanical pressure transducer and a holder with the possibility of providing the immobility of the skid in the direction of pressure on it from elastically deformable protrusions, and the electromechanical pressure transducer has a thickness in this direction less than half the wavelength of the reproduced signal.

The drawing shows one of the possible variants of the proposed device.

The device contains a skid 1, made of any wear-resistant material, such as diamond, in the form of a triangular prism.

The skid is mounted with the possibility of simultaneous conjugation with the ridges of at least two protrusions of the modulated groove 2 exerting on it, the carrier 3 of the record. Slide shcha edge 4 runner located

at an acute angle to the direction of relative movement of the recording medium, and its incident edge 5 is almost vertical to this direction.

Runner through hard glue reinforced

on an electromechanical pressure transducer 6 provided with conductors 7 for removing the reproduced signal. The electromechanical pressure transducer has a thickness that is less than half the wavelength of the reproduced signal in the direction of the pressure exerted on the runner 1 by elastically

deformable protrusions modulated grooves 2.

A piezoceramic or magnetostrictive element can be used as an electromechanical pressure transducer.

The elastic element 8 is made of a soft material with a high internal attenuation and is installed between the flattened end 9 of the tubular holder 10 and the electromechanical pressure transducer 6 with the possibility of ensuring the immobility of the skid 1 in the direction of the pressure exerted on it by the elastically deformable projections of the modulated groove 2. The other end 11 of the holder 10 is reinforced by an elastic ring 12 made of an elastic material with high internal attenuation. In addition, the holder 10 can be mated with an additional damping element 13, made in the form of a ring of soft material with a high internal attenuation.

The holder 10 may have a curved shape that allows the axial line of its end 11 to pass through the interface of the sliding edge 4 and the projections of the groove 2. The latter prevents the occurrence of rotational oscillations.

In the process of reproduction, the runner 1 moves along the groove 2. In this case, the elastic deformation of the groove projections takes place.

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carrying the information about the recorded signal and conjugated to the sliding edge 4. When edge 5 escapes from one of the projections of the groove 2, there is a change in pressure exerted from these projections on the edge 4. This change in pressure of the deformed projections of the modulated groove 2 leads to the formation of the corresponding signal in the electromechanical transducer 6 pressure.

Subject invention

A device for reproducing the recorded signal, containing an electromechanical pressure transducer, rigidly connected to a skid mounted to mate with at least two ridges simultaneously exerting pressure on the elastically deformable protrusions of the modulated groove of the recording medium, and a holder, characterized in that reducing the wavelength of the reproduced signal; an elastic element is inserted into it, which is installed between the electromechanical

pressure transducer and holder with the ability to ensure immobility of the skid in the direction of pressure on it from the side of elastically deformed protrusions;

The pressure is made in this direction with a thickness less than half the wavelength of the reproduced signal.