DE213317C - - Google Patents

Description

IMPERIAL

PATENT OFFICE.

It is known that oleaginous fruits are squeezed out at three different pressures procedural stages to be carried out, namely

1. Empty the press from the residues the previous squeezing process and refilling the press,

2. Pre-pressing at medium pressure and

3. Finish pressing at the highest pressure.

The invention relates to a reliable control device, through which the duration each of these three pressure stages at a point as far away from the press, e.g. in the office of the factory owner, automatically recorded and thereby the whole operation is monitored. Of course, the device is not only for hydraulic oil presses, but generally applicable to all those hydraulic presses which work in three against each other work with sharply defined pressure levels.

The essence of the invention is that the pointer is connected to the press Manometer is used as a switching element for two electrical circuits, which affect the position of a pen in relation to a strip of paper passed by it.

The schematic representation shows, for example, two such control devices, which register here on the same strip of paper and to control two various presses.

The paper strip a, on which the registration of the three stages of each squeezing process is to take place, is placed around a roller F , which is rotated by a clockwork G at a constant speed, z. B. so that it completes one revolution in 24 hours. The writing levers H of both control devices are in constant contact with the paper strip, so that lines are drawn when the roller F rotates. Each writing lever H swings around a pin b and is usually held in its horizontal central position by two springs c, c, as can be seen on the right-hand side of the drawing. The extension of the writing lever on the other side of the pin b is formed into a double armature d , which is located between the facing poles of two electromagnets C, D , so that the pen is either lowered or raised, depending on the electromagnet C or the electromagnet D. _{Λ tighten} the anchor ä . Each of the electromagnets is connected to a special circuit. The pointer e of a manometer E connected to the oil press serves as an interrupter for both circuits. Both circuits are fed from a common external double line /, g . One pole of each electromagnet is connected to the pivot of the pressure gauge pointer. The second pole of the electromagnet C. is with one

The insulated contact h arranged at the lowest pressure gauge division is connected, while the second pole of the electromagnet D is connected to another insulated contact i, which is located at the division giving the highest working pressure.

The external lines / and g are directly connected with the interposition of two resistors A and B; of these resistances

ίο there is one, A, still outside the branch line g leading to the pin of the pointer e , the other in that line piece which belongs both to the two circuits entering the electromagnets C and D and to the connecting piece of the external lines f and g . The amount of current flowing into the electromagnets C and D can be regulated by suitable dimensioning of the resistors / 1 and B.

The device described works as follows:

While the press is being emptied and refilled, the pointer e lies on the contact h, so that the circuit containing the electromagnet C is closed and the pen assumes the lower position illustrated on the left-hand side of the figure. During the pre-pressing (working with medium pressure) the pointer moves into the position indicated on the right-hand side of the figure, so that both circuits are interrupted. As a result, the writing lever is exclusively subject to the influence of the springs c, c, so that it is maintained in its central position. As soon as the final pressing (working with the highest pressure) begins, the pointer e comes into contact with the contact i; now the circuit containing the electromagnet D is closed and the pen assumes its highest position. When the pressure is released, the pointer returns to contact h , whereupon the various processes are repeated. As a result, the pen draws a continuous broken line on the paper of the shape shown in the drawing.

The roller F can be held so high in a known manner that any number of control devices, which are arranged at a suitable height offset from one another, register on the same strip of paper. It is expediently ensured that all pens touch the paper strip in the same vertical line (time coordinate), so that the time indications of all the recordings match and the associated pressures can be directly compared with one another.

Claims (2)

Patent Claims: 1. Electrical time control device for registering the duration of three working stages of hydraulic presses, in particular hydraulic oil presses, with a pressure gauge whose pointer serves as a power switch, characterized in that the device has two circuits controlled by the pointer (s) of the pressure gauge, in which two Electromagnets (C, DJ are switched on, which move the recording pen of the device from a central position to one or the other side, depending on their excitation, so that the pen in its central position has one work step, in its two side positions the other two Records work stages of the press. 2. Time control device according to claim i, characterized in that the 8, ι pen is attached to a lever (H) which is obtained in its central position by spring action (c) and at its end (d) as a common armature of the two electromagnets ( C and D) is formed. 1 sheet of drawings.