DE1252916B - Arrangement for recording integral curves with a recording device - Google Patents

Description

GERMAN WWW ¹ PATENT OFFICE

German class: 42 d - 10

EDITORIAL

Number: 1 252 916

File number: S 71216IX b / 42 d

1 252916 Filing date: November 11, 1960

Opening day: October 26, 1967

The invention relates to an arrangement for recording integral curves with a writing Recorder. In such devices, there is a defect that the writing width in many cases is perceived as too low. In gas chromatography, there are bands with a half-width of 3 to 180 seconds to integrate. In order to create a sufficient for such an integration It is possible to switch over the series resistors of the integration motor. Everyone has this but the disadvantage that additional operations must be carried out on the device.

An arrangement of the type described has become known in which the recorder has a limit contact which the writing organ ι actuates after the maximum deflection is exceeded, so that the zero point is suppressed and the writing organ begins to write again at its starting position. This arrangement requires a relatively large amount of effort using components that are not produced in series.

The invention is based on the principle of the known arrangement just described and avoids the disadvantages of the same in that two pole-changing switches that can be controlled by the limit contact are provided, one of which is a potentiometer controlled as a function of the measured value with a Integration motor connected in polarity determined by the position of this pole reversing switch and over the other the measuring mechanism of the writing instrument alternately to one or the other end and the from the integration motor adjustable tap of a potentiometer is connected, so that the integration motor and the polarity of the measuring mechanism can be reversed at the same time.

The invention has the advantage that the arrangement only consists of compensation recorders produced in series components used. The effort involved is extremely low; namely, they are only two pole reversing switches required, those for the integration motor and the recording instrument upstream themselves.

An embodiment of the invention is described below with reference to the figures.

To illustrate the mode of operation of the invention, FIG. 1 shows the function U (t) . The integral curve of this function J U {t) ät is shown as a broken line. It can be seen from this that, depending on the nature of the output function, a very large writing width may be required to represent the integral curve. With the arrangement according to the invention, the arrangement for recording integral curves with a recording device can now be used

Applicant:

Siemens Aktiengesellschaft, Berlin and Munich, Munich 2, Wittelsbacherplatz 2

Named as inventor:

Dipl.-Ing. Günter Hoffmann, Karlsruhe

Integral curve /, as shown in FIG. 2, to record on the strip chart R.

F i g. 3 schematically shows an embodiment of the arrangement according to the invention. The motor of a compensation recorder, which records the output function, is denoted by _{M 1.} In addition to the compensation potentiometer P _1, this motor drives a follow-up potentiometer P ₂ through which a constant current flows and from which the voltage for the integration _{motor M 2 is} tapped. The integration _{motor M 2 in} turn drives the potentiometer P ₃ , from which the voltage for actuating the measuring mechanism of the measuring device N writing the integral curve is tapped. The writing element O of the measuring device N actuates a limit contact G at its maximum deflection . The actuation of this contact G triggers the switching of the contacts K ₁ to K ₄ via the relay circuit S in each case. The mode of operation of the arrangement is as follows: The contacts K ₁ to K _i may be in the position shown, and the integration motor M ₂ runs clockwise. The wiper of the potentiometer P ₃ is thereby moved from point A in the direction of point B. If the _{wiper of the potentiometer P 3 has} reached point B , then the full voltage is applied to the measuring mechanism of the device Λ 'that writes the integral curve. This closes the limit contact G and actuates the relay switching device S , which switches the contacts K ₁ to K _1. As a result, the voltage at the measuring mechanism of the device N is zero, and the pen O returns to its starting position. The integration motor M ₂ now runs counterclockwise until the wiper of the potentiometer P ₃ reaches point A. In this case, the writing element O has again reached its maximum deflection

709 679/245

Claims (1)

and the limit contact G is actuated, whereby the contacts K ₁ to K _{i are switched back} into the position shown via the relay circuit S. Claim: Arrangement for recording integral curves with a recording device which has a limit contact which the writing element actuates after the maximum deflection is exceeded, so that the zero point is suppressed and the writing element begins to write again at its starting position, characterized in that two of the limit contact (G ) controllable pole reversing switches (K _v K ₂ ; K _s , K _i ) are provided, of which one (K _v K ₂ ) _{a potentiometer (F 2} ) controlled as a function of the measured value is connected to an integration _{motor (M 2} ) in a polarity determined by the position of this pole reversing switch (K _v K ₂ ) and the measuring mechanism of the writing instrument (N) via the other (K _v K _i) is connected alternately to one or the other end (A or B) and the tap of a potentiometer (P ₃ ), which can be adjusted by the integration motor, so that the integration motor ίο and the measuring mechanism are reversed at the same time. Considered publications:
U.S. Patent Nos. 2,926,984, 2,673,136,
2,447,018. 1 sheet of drawings