SU20353A1 - Device for automatic membrane permutation with a needle in phonographs - Google Patents

Description

The device, shown in the vertical section of the drawing, is aimed at automatically moving the gramophone membrane with a needle: to the initial position, by means of -. The VIA of the lever located above the phonograph plate, which rests on the fist eccentric, makes one revolution during the passage of the entire record under the needle.

In the box 1, an electric motor M or a pulley rotated by some other engine outside the device is placed. From the motor L, rotation with the aid of conical teeth 14 and 15 and cylindrical 17, 18 and 19 is transmitted from one side to disk 2, on which the phonograph plate rests, and from the other to the device moving the diaphragm with the needle to the initial position after it has reached until the end of the record. Movement to this device is transmitted from axis 13 by means of gears 21, 22, 23j 24 fixed on racks 25, the gear ratio

which is selected so that the fist eccentric 12 makes one revolution for the number of revolutions of the phonograph record that is required for the entire needle to pass under the needle. The eccentric 12 rotates to raise the rod 9, terminating with a fork, on which the lever 5 rests with the stops 6, equipped with micrometric screws, which set the limits of the movement of the membrane 7. When the lever 5 is raised, the membrane 7 suspended on the roller 8 rolls back along the lever 5 to stop 6, i.e. to the starting position. The rod 9 is surrounded by the tube 10 and its end 11, which abuts against the eccentric 12, is provided with a roller for reducing the friction.

The subject of the patent.

A device for automatic transposition of the membrane with a needle in phonographs, characterized by the use of a lever 4 located above the phonograph plate and a hinged arm, 4 levers 5, the free end of which

on the rod 9, supported on the cam eccentric 12, rotated through the appropriate gear 21-24 from the engine G, which causes the gramophone to rotate, to what kind of curved screws.

the lever 5 is suspended by a imbrap 7 iri using a roller 8, which can move along the lever 5 between two abutments 6 equipped with a mic for their installation

), --Г

/ -five ) ,

uiiir r: -: ;; - iJ;:. :::; T: w i:; -.: - -;: - 1Г. : -; i

li, fv

ti

f S / S; iSi5lfe y; | , v;.;. i., .., i;,. i -.,:. .J.Z ;, - ,,,., - ,; ...-, -,, - .., -. i. ,,,.,;, y. „.: .. -.

 r- .i7; . .-:

"

X.-,

;:; /