US2476715A - Record changing device - Google Patents

Description

Jul 19, 1949.

3. G. FALK RECORD CHANGING DEVICE Filed Nov. 29., 194:5

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Patented July 19, 1949 RECORD CHANGING DEVICE Sven Gustaf FalkpStockholm, Sweden, assignor to Svenska Aktiebolaget Philips, Stockholm, Sweden, a corporation of Sweden Application November 29, 1943, Serial No. 512,197

In Sweden August 15, 1942 Section 1, Public Law 690, August 8, 1946 Patent expires August'15, 1962 1 Claim.

In phonographs having automatic recordchanging mechanism there is generally employed a guide pin passing through the central opening of the records, along which pin the records successively slide down when a releasing member disengages the lowermost record. However, certain auxiliary supports or auxiliary guides also must be employed, in order that the operation may be satisfactory.

The auxiliary supports or guides hitherto employed for this purpose have generally been complicated, and nevertheless they have not always functioned in a satisfactory manner.

By the present invention a considerable simplification and improvement is obtained due to the fact that said auxiliary supports or guides have been replaced by a single actuating member supported by the phonograph stand, which member is adapted to act upon the records from above in such a manner that these are stabilized in a position perpendicular or substantially perpendicular to the guide pin.

The efiect of pressure of said actuating member may be brought about either by Weight load or by elastic load. The said member is mechanically operated for movement parallel to itself and so arranged that after having been raised a certain distance it may be conveniently turned away from the records.

According to a particularly simple embodiment of the invention, the actuating member consists of an angle rod or the like, one part of which can be raised and lowered while being guided relatively to the phonograph stand, and the other part of which extends inwardly across the records and rests under pressure against the same at suitable places.

An embodiment of the invention is illustrated in the accompanying drawing.

Fig. 1 shows a vertical section through the improved device. Figure 2 shows the device as viewed from above.

The turn table I of the phonograph is mounted on a stationary sleeve 2, in which is inserted a guide pin 3 with which a releasing member 4 is combined. This releasing member swingably mounted on a pin 5 is provided partly with an end portion 6 which forms a continuation of the guide pin 3, and partly with a shoulder l which engages the bottom side of the lowermost record of the piled-up records 8 to be played.

By readjustment of the releasing member 4 the records may successively be disengaged in order to fall down onto the turn table I. However, the invention is not directly dependent on 2 the operation of the guide pin and that of the releasing member, and therefore a detailed explanation of their operation is considered unnecessary.

According to the illustrated embodiment, secured to the covering 9 of the phonograph is a sleeve shaped upright I0 in which one angle part I I of an angle rod can be raised and lowered while being guided therein, the other angle part 12 of said rod extending inwards across the records 8. The angle part [2 terminates in a ring l3 or the like which stabilizes the records so that they are caused to assume a position perpendicular or substantially perpendicular to the guide pin 3. According to the shown embodiment, the angle part [2 terminates, as already mentioned, in a ring, but this form has only been adopted as an example and it is evident that the form can be modified in many ways within the scope of the invention, that is to say the contacting manner, and the points at which the pressure is acting may be varied. The principal thing is that a single actuating member mechanically operated in a certain manner is provided for stabilizing the records. The angle part l2 may be provided with a finger grip M or the like, by means of which the angle rod ll, l2 may be conveniently lifted against the action of a spring l5 or a weight tending to move the rod downwards, so that the ring I3 exerts a certain pressure on the records, the position of which by this means is stabilized in a simple and advantageous manner. Upon raising, the rod part I2 is moved out of a guide slot I6 provided in the upright I0, and it may thereafter conveniently be swung out from the records, for instance when new records are to be placed in position.

For efiecting an automatic stopping of the phonograph in its entirety, the actuating member is adapted to descend a further distance upon the lowering of the last record and thereby to actuate a stopping device, a portion ll of which is indicated in Figure 1.

Besides being simple and practical the arrangement ofiers furthermore the appreciable advantage that the diameter of the records need not be taken into consideration but different sized records may be employed during playing, which generally is not the case in the known arrangements.

I claim:

In a record changing device for phon-ographs, a turntable, a substantially vertical guide pin passing through the central openings of a stack of records positioned above the turntable, a rec-i said member in a, direction parallel to the guide pin, the other arm extending from the first arm inwardly across the records and having a portion 10 extending at least artly around the guide pin, the outer edge of said portion contacting the central portion of the uppermost record at points spaced outwardly from said guide pin at a distance which is large with respect to the diameter of the guide pin. 7

SVEN GUSTAF REFERENCES CITED The following references are of record in the file of this patent:

UFNITED STATES PA'I'ENTS Number Name Date 2,279,851 Waln et a1. Apr. 4, 1942 2,284,305 Slade May 26, 1942 2,287,098 Habegger June 23, 1942 2,291,158 Holsteiisson et a1. July 28, 1942 2,295,092 Offeii Sept. 8, 1942 2 ,348,257 Kahl et a1. May 9, 1944

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