SU917195A1 - Sound pickup - Google Patents

Description

(54) SOUNDER

I

This invention relates to instrumentation engineering, in particular to devices for reproducing mechanical recording.

It is known a device comprising a head, a ton arm fixed on a hinge support, a vertical position sensor of the tonearm and a microlift connected via a control device to the horizontal position sensor of the tonearm 1.

The drawback of the device is its structural complexity and the absence of a device for centering the tonearm.

Of the known devices, the electric player pickup is the closest to the technical essence, comprising a head, a arm, mounted on a hinge support, a center of the arm, a microlift, connected through the control to the horizontal position sensor of the arm, performed in the form of a differential pair of photosensitive elements installed with the ability to interact with the light source through the slit of the screen, mounted on the tonearm 2.

The disadvantage of the pickup is the presence of a separate device for centering the arm in a raised position and the absence of a sensor for the vertical position of the arm.

The purpose of the invention is to simplify the device by combining the centering function with. horizontal position sensor tonarm and use of the latter as a date-. Chika upright tonarm.

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Claims (2)

For this purpose, a device containing a pickup head, a tonearm mounted on a hinge support, a toning centering device, a microlift connected through a control device to the horizontal position sensor of the tonearm, made in the form of a differential pair of photosensitive elements, mounted with air. It is possible to interact with the light source through the screen slot, reinforced on the top of the screen, symmetrically with respect to a pair of photosensitive elements of a light-tight barrier, located in the screen slot, while the slot is made in the form of a vertical symmetrical sixth hexagon that goes into the slot. Nafig 1 depicts preA) 1g (a guided device, a common 1nd; fig. 2 shows the location of an opaque septum in a slit of a screen mounted on the arm when the toner arm is raised - 2a, is in the working position - 26, or lowered - 2c. Device contains a pickup head 1, a tonearm 2 mounted on a hinged support 3, a microlift 4, connected via a control device 5 to a horizontal position sensor, made in the form of a differential pair of photosensitive elements 6 and 7 installed with the possibility of interaction with the light source 8 Through the slit of the screen 9, mounted on the tonearm 2 .. In the slit of the screen 9, made in the form of a symmetrical hexagon extending vertically into the slot, an opaque partition 10 ,, is fixed along the longitudinal axis of the tonearm and symmetrically relative to a pair of photosensitive elements 6 and 7 on a movable base (not shown). The device works as follows. In the search mode for a fragment of the recording, the tonearm 2 is lifted using a microlift 4. When the partition 10 is lifted, I will interact with the edges of the upper slot in SG screen is not 9, centers the arm 2 and fixes it in position, not to give raskachivats when moving spores 3 (FIG. 2, a). In this mode, the horizontal position sensor performs the function of a centering device. In the playback mode, the tonearm 2 is moved using the microlift 4 until the head 1 drops onto the surface of a gramophone record (not shown). In this case, the movable screen 9 rises the upper edges of the slit of the waste section from the partition 10, releasing the tonear 2 (Fig. 2 b). In this mode, the horizontal position sensor works in its basic quality. In the search mode of the gramophone record format, the arm 2 descends below the working position. The movable screen 9, lifting, the lower edges of the slit interacts with the partition 10, which centers the tone arm and enters the slot of the screen 9. In this case, the luminous flux is completely blocked off by the screen 9 (Fig. 2c) and there are no signals at the output of the photosensitive elements b and 7 in contrast to the reproduction mode, when the senses are equal to each other, but different from zero. The control device 5 with oicytcTBim signals from elements 6 and 7 using a microlift 4 raises the tone arm 2 with the head 1 of the pickup. This mode is characterized by the use of a horizontal position sensor for the tonearm as a vertical position sensor. The use of the proposed device will allow to obtain a positive effect, which consists in simplifying the design, which leads to a reduction in the cost of the sound suppressor, and increase the reliability of its operation. The invention includes a pickup head, a tonarm, mounted on a pivot bearing, a toning centering device, a microlift, connected through a control device to a horizontal position sensor of the tonearm, made in the form of a differential pair of photosensitive elements installed with the ability to interact with a light source through a screen gap, reinforced on the tonearm, characterized in that, in order to simplify the design of the pickup, it contains an opaque barrier at fixed symmetrically relative to the pair of elements and fotbchuvstvitelnyh raspolozhennzto a screen slit, wherein the slit is formed as a piece of said vertically symmetrical shestiugolshysa transition present in the slot. Sources of information taken into account in the examination 1. Brodkin V. M. Electroplay devices, M., Energie, 1972. 2. Radio Mentor Elekt.ronik, J N 43, 1977 N 8 Plattenspieler mit Tangential-Tonarm, s. 333-334. fuz 13