DEG0008163MA - - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

Registration date: February 13, 1952 Advertised on: September 8, 1955

GERMAN PATENT OFFICE

The subject of the invention is a device for photoelectrically or by sliding contacts to be scanned Scales of scales or similar measuring devices for error-free scanning of the Scale at the transition points from one decade to the next.

Scanning scales photoelectrically and transferring the results to a display or printing unit, is known. Attempts have also been made to reduce the width of the feeler slot in the Scanning organ under certain circumstances possible double counting at the decade transition points avoid additional facilities.

So you have a mechanical scanning of the weighing result by means of sliding contacts compared to the scale arranged increased scanning point provided that a switch to a causes a second, laterally offset scanning element. Since this raised sampling point is as large as a scale unit must be designed and this acts like a graduation unit, can thereby the desired accuracy in correction and scanning can never be fully achieved, if only because the scanning width has to be chosen too large. There is also the Possibility of receiving false prints at the intersection of the decade, even if the scanner deviates from the radial movement by only a fraction of a division unit.

With other scales you have a special correction point for every decade, especially also a special scanning organ for each decade

509 551AOO

Claims (3)

G 8163 IXb / 42d and KniTcküirorgan provided. The scanning process and especially the correction process becomes this is complicated and the setup is very expensive. l) he would failure of a photocell probably still secure the correction, but a correct count in the supervising Decade not be sure to be chosen. Throat eyes in such display resp. I hitch devices are avoided ίο that ciTmdungsgctnäl.i the correction points approximately are properly arranged between the transition points from one decade to the next and an amount of a fraction of a division unit own and dal! they in their radial scanning, in which a single scanning element at the same time the scanning of the correction points, the control of the correction setting and then the sampling of the individual decades takes place one after the other, in the scale row on the so (ireiizc of the decades directly or indirectly initiate a pivoting or displacement of the scanning member by about half a dividing interval. I! Ei pivotable mounting of the scanning element as canoe the pivot axis by an elastic means, like (iunimi, feather or the like., be formed. In the drawings, the invention is explained using an example of a guide; in I ¹ Mg. Ι is an according to the invention trained 3 »Scale shown in view; Fig. 2 shows the device for pivoting the scanning device when scanning the correction point in view, and 3 illustrates the parallel displacement of the scanning device; in Kig. . | the principle of the inventive idea is explained, namely the movements of the scanning element during the scanning process. The tactile seat 21 of the photocell moves towards no next in direction · *; towards the correction slot 22 (Fig. - |). If light falls through the correction slit 22 on the photo cell scanning slit 21, a current is triggered which causes a movement of the scanning seat 21 in direction b by approximately half a division /, into position 23. This corrects the correction and the sensor seat (Wr photocell is moved out of its critical position, in which it is possible to touch scale 1 and decade 2, where otherwise a false count would be caused The scanning element moves further in direction α towards the scale. Scanning is no longer carried out at the decade limit, but within the decade in the space between the individual decades 1 each has a special correction point 22 fio a width of a fraction of a unit of division is arranged. The photocell 5 (FIG. 2) is connected to the amplifier 7 via the lines 6; the current amplified there is fed via lines 8 to the magnet 9, which when its armature 11, which is pivotable about the axis 10, is pulled back, pushes the photocell mounted on its angle arm 12 in the direction of arrow c (FIG. 2) by half a pitch interval. When importing the scales or other reading scale, the magnet 13 is energized by actuating a switch (not shown), by means of which the scale is held in the input position. Only then is the scanning process triggered by the guide rod 14 carrying the photocell 5 being set in motion. If the photocell 5 hits a correction point 22 during this scanning process, the magnet 9 is actuated by the current pulse via the amplifier 7, the armature 11 of which moves the photocell 5 arranged on its angled arm by about half a sub-interval Z ₁ in the direction of arrow c (Fig. 2 ) or b (Fig. 1) pushes back so that the photocell 5 is clearly attached to the z. B. for the photoelectric scanning set up tick marks of the first decade 1 is guided along. Since the photocell 5 is now far enough away from the first graduation line of the next decade 2 to prevent a response there too, any possibility of double counting at the transition points between the individual decades is excluded. If during the scanning the photocell 5 is guided past to the right of a point 22 (FIG. 1), the first interval of the next higher decade 2 is clearly counted without touching the first decade 1. The transmission of the photoelectric pulses generated when scanning any correction point 22 to the correction magnet 9 takes place in a manner known per se. In the embodiment shown in FIG. 3, when the magnet 9 'responds, the photocell 5' carried by its anchors' is displaced on a guide rail 17 at right angles to the scanning movement by the amount of correction. 105 Paten tan s ρ r 0 c η ε. · ι. Correction device for unambiguous scanning of the transition points of the decades scales of measuring devices, in particular scales that can be scanned photoelectrically or by sliding contacts Scales, consisting of special ones, outside the range of the actual division arranged correction points and a scanning device, which, controlled by a photoelectric cell, at the transition points a correction of the setting by adjusting caused by the part to be scanned and the part to be scanned against each other, characterized in that the correction points (22) approximately in the middle between the transition points from the one decade (1) are arranged to the next and have a width of a fraction of a division unit and that they are radial Scanning, in which a single scanning element simultaneously scans the correction points, 551/100 G 8163 IXbI 42d the control of the correction setting and then the scanning of the individual decades takes place one after the other, indirectly (6, 7, 8, 9, io, ii, 12) or immediately one in the scale row at the border of the decades Pivoting or displacement of the scanning element by about half a division interval initiate. 2. Device according to claim i, characterized in that that the pivot axis (ίο) of the angle armature (ii, 12) by an elastic Means such as rubber, spring or the like. Is formed. 3. Device according to claim 1 and 2, characterized in that a guide rail (17) is arranged on which the movement of the photocell takes place. Referred publications: German Patent Nos. 618 399, 637 839, 842. 1 sheet of drawings