DE1049118B - Removable stacking axis for record changer - Google Patents

Description

The invention relates to a removable stacking shaft for record changer for records with large central openings (45 rpm) with a facility to turn off the device after the last record with holding and supporting organs and a vertically movable switch rod, which after Dropping the last record causes the turntable to stop.

The previously known automatic shutdown devices for these record changers work in Depending on the weight of the records carried by the stacking axis. When this weight on Zero is reduced, responds to a spring that takes care of the shutdown. With the light weights that especially records with 45 rpm today (20 to 30 g) are the proper actuation a shutdown device responsive to the plate weight is easily questioned. As the records show significant weight differences among each other, is an incorrect operation of the cut-off device can hardly be ruled out in the case of a weight-dependent release. Another disadvantage is that the springs used for this tire, so that this, in the long run, also leads to incorrect actuation can be triggered.

The present invention aims to overcome the disadvantages of the weight-dependent disconnection devices to eliminate. For this purpose, it is proposed according to the invention to design the stacking axis in such a way that that in its interior in front of opposite wall slots two angle levers can be pivoted are stored, which via a non-rotatably connected rod mounted in the axis of the turntable pushed so far outwards by means of a non-isosceles lever mounted around a horizontal axis until they hit the edges of the center holes of the records resting on the stacking axis and can step outside unhindered after the last record in the stack has been thrown away, whereby the shift rod initiates the overturning of the unequal-armed lever, which then comes into action a switch-off element operated by the exchange mechanism is brought.

The shift rod arranged in the middle consists preferably of two parts, of which the upper, is mounted on the angle lever acting part in the stack axis and on the in the head of the Plate change control guided lower part of the shift rod is supported.

According to a further embodiment of the invention, the pivot lever mounted about a horizontal axis is designed so that it can assume two different switching positions, ie an end position in which, when the plate-removable stacking axis is exhausted, it can be moved
for record changers

Applicant:

Les Industries Musicales et Electriques
Pathe Marconi, Paris

Representative: Dr.-Ing. H. Negendank, patent attorney,
Hamburg 36, Neuer Wall 41

Claimed priority:
France March 3, 1955

Gaston Isodore Leriget,
Chatou, Seine-et-Oise (France),
has been named as the inventor

Supply switches off the turntable and an intermediate position in which it still does not allow the turntable to operate automatically despite the disk supply being exhausted.

The invention is explained with reference to the drawings. It means

1 shows a stacking axis according to the invention in a vertical section,

2 shows a switch-off lever in a working position of part of the device according to the invention.

In the drawing, 1 designates the cover plate of the turntable, 2 the chassis of the turntable, into which the fixed shaft 3 of the turntable 4 is screwed, which is mounted on a ball bearing 5 and held on the shaft 3 by sliding bearings 6 .

7 denotes the body of the stacking axis, which is provided with a plate supply 8 on its upper part and is held by the support elements of the known and therefore not shown ejection system. There are two such support elements which are diametrically opposite one another in a plane perpendicular to the plane of the drawing. The ejection system is actuated by a known axial control rod 9 , which is tubular.

The head of the control rod 9 actuates the control 10 , indicated by dashed lines, of the ejection system of the stacking axis in a manner known per se. The upper pressure rod 11 slides inside the control rod 9.

309 730/215

Claims (3)

In the stacking axis 7 there is the pressure rod 11, the upper end of which is provided with a horizontal split pin 13 which forms a T with the rod 11, and whose two symmetrical legs can slide in two elongated slots 14 which are diametrically identical in two 5 opposite tactile levers 15 are provided. These sensing levers are pivotally mounted at 16 on brackets 17 which are rigidly connected to the body of the stacking axis. The feeler levers can step outwards through two vertical slots. This arrangement is arranged at a height which corresponds to the position of the lowermost plate of the plate supply resting on the support elements. If the stacking axis is provided with plates, the two sensing levers, even if only a single plate is still on, cannot emerge from the body of the stacking axis and assume the fully extended position in the drawing. However, if the supply of disks is exhausted, the two feeler levers move into the position shown in dashed lines. The outer profile of the feeler lever and the shape of the elongated slots 14 are designed so that the T-shaped cotter pin of the rod 11 assumes the position 13 when the stacking axis carries a record. If there is no plate supply, it assumes the position 18, since a pressure is exerted on the pressure rod 11 from the bottom upwards via the lower pressure rod 12 by means of the pivot lever 19-20 pivotable about a horizontal axis 21. The arm 20 of the pivot lever is overweight, so that the pressure rods 12 and 11 are kept constantly in contact with one another at their ends. The cotter pin 13 engaging in the openings 14 thus constantly seeks to pivot the feeler lever 15 outwards. As long as the disk supply is not exhausted, the pivoting lever 19-20 is held in the position shown fully extended, but as soon as the last disk of the disk supply falls onto the turntable, the pivoting lever 19-20 automatically goes into the lowest position shown in phantom. In this low position, which according to the invention is intended to automatically switch off the device drive, the switch-off is achieved in two sub-steps. The free end 20 of the pivot lever 19-20 first rests on the part 22 (FIG. 2) which is actuated by the changing mechanism of the turntable and which determines the mode of operation by a suitable pivoting movement about the vertical axis 23. The pivoting movement of the part 22 and the return to its starting position begins immediately after the playback of the disc on the turntable begins. When the sensing levers 15 have determined that the disk supply is exhausted, the part 22 has already resumed its position for automatic work, so that the last disk of the disk supply that has fallen onto the turntable is played despite the beginning of the downward movement of the arm 20 of the pivot lever 19-20 . After the start of playing this last record, the part 22 returns to its starting position, as with all previous records, and no longer prevents the arm 20 from moving completely downwards adjusted so that the pressure of the arm 20 on the part 22 does not brake the movement of the same. The second step of the downward movement of the arm 20 then takes place, and the pivot lever 19-20 assumes the lowest position shown in broken lines in FIG. In this lowest position, the end of the arm 20 is at the same height as the part 22 and prevents this part from assuming the position that determines the automatic work again. The work becomes semi-automatic, the tonearm can go down to its rest position and switch off the turntable's motor. The shape and position of the pivoting movement of the part 22 can be arbitrary. Patent claims: 1. Removable stacking axis for record changer for records with large central openings (45 rpm) with a device for setting down the device after the last record has been dropped with holding and supporting elements and a vertically movable switch rod that stops the record player after the last record has been dropped caused, characterized in that two angle levers (15) are pivotably mounted in the interior of the stacking axis (7) in front of opposite wall slots, which via a non-rotatably connected rod (11, 12) mounted in the axis of the turntable (1 ) by means of a non-isosceles, are pressed around a horizontal axis mounted lever (19,20) as far outwardly until they abut against the edges of the center holes of the resting on the stacking axis (7) records (8) and the stack can pass unhindered to the outside by dropping the last record whereby the shift rod (11,12) prevents the unequal arm lever (19, 20 ) which is then brought into the range of action of a switch-off element (22) actuated by the exchange mechanism. 2. Stacking axis according to claim 1, characterized in that the centrally arranged switching rod consists of two parts (11, 12) , of which the upper part (11) acting on the angle lever (15) is mounted in the stacking axis (7) and is supported on the lower part (12), which is guided in the head of the plate changing control (9). 3. Stacking axis according to claim 2, characterized in that the pivot lever (19, 20) mounted about a horizontal axis can assume two different switching positions, ie an end position in which it switches off the turntable when the disc supply is exhausted and an intermediate position in which it despite Exhaustion of the disk supply still allows a non-automatic operation of the turntable. Considered publications:
British Patent No. 590 '176. 1 sheet of drawings © 809 730/215 1.59