DE264821C

DE264821C -

Info

Publication number: DE264821C
Application number: DENDAT264821D
Authority: DE

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

~ M 264821 KLASSE 42«. GRUPPE~ M 264821 CLASS 42 «. GROUP

Die Erfindung bezweckt, Kreise in verzerrter Form zeichnerisch darzustellen/ was bereits dadurch erreicht wurde, daß dem bekannten, zur Vergrößerung verwendbaren, sogenannten Storchschnabel eine besondere Führung seines festen Punktes in gerader Richtung gegeben wird. Das Neue der Erfindung' ist, daß ein in einer Nut verschiebbares Gleitstück angeordnet ist, welches den Gelenkpunkt des Pantographen sowie eine senkrecht zur Nut angeordnete Hülse für die Führung einer in ihr verschiebbaren Stange trägt, an der der Führungsstift befestigt und die mit dem Ubersetzungspunkt gelenkig verbunden ist.The aim of the invention is to graphically represent circles in a distorted form / what already was achieved in that the known, usable for enlargement, so-called Cranesbill given a special guide to its fixed point in a straight line will. The novelty of the invention 'is that a sliding piece is arranged in a groove is, which is the hinge point of the pantograph and a perpendicular to the groove Sleeve for guiding a rod that can be moved in it, on which the guide pin attached and which is articulated to the translation point.

Es können daher mit dem neuen Apparat auf einfachste Weise sowohl fast kreisrunde, als auch äußerst flache Ellipsen gezeichnet werden, wodurch einem längst gefühlten Bedürfnisse auf dem Gebiete der zeichnerischen Arbeiten entsprochen wird.The new apparatus can therefore be used in the simplest possible way to create both almost circular, as well as extremely flat ellipses can be drawn, creating a need that has long been felt in the field of drawing work is met.

Der Erfindungsgegenstand ist in beiliegender Zeichnung in einem Ausführungsbeispiele dargestellt, und zwar zeigt:
Fig. ι einen Grundriß undThe subject of the invention is shown in the accompanying drawing in an exemplary embodiment, namely shows:
Fig. Ι a plan and

Fig. 2 eine Seitenansicht des Apparates,Fig. 2 is a side view of the apparatus,

Fig. 3 eine veränderte Anwendungsform des Apparates in schematischer Darstellung.3 shows a modified form of application of the apparatus in a schematic representation.

Die Wirkungsweise und Einrichtung des Apparates besteht hiernach im Prinzip darin, daß der Punkt α des Storchschnabels im Kreise herumgeführt wird, während der bei einem gewöhnlichen Storchschnabel . bisher feste Punkt b in gerader Richtung ebenfalls beweglich ist und immer in gleicher Höhe mit dem Punkte α senkrecht geführt wird, zu welchem Zwecke der erstere an einem Gleitstück c angelenkt ist, welches in einer Führungsschiene d verschoben wird.The mode of operation and installation of the apparatus consists in principle that the point α of the cranesbill is led around in a circle, while that of an ordinary cranesbill. hitherto fixed point b is also movable in a straight line and is always guided vertically at the same height as point α , for which purpose the former is hinged to a slider c , which is moved in a guide rail d .

Dadurch wird erreicht, daß die Storchschnabelspitze -e die Bewegung des' Punktes a nur in der wagerechten Richtung vergrößert, nicht aber in der senkrechten Richtung, und es beschreibt daher der wirksame Punkt e (Zeichenstift) eine Ellipse, während der Punkt a einen Kreis beschreibt.This ensures that the cranesbill tip -e increases the movement of point a only in the horizontal direction, but not in the vertical direction, and therefore the effective point e (pen) describes an ellipse, while the point a describes a circle .

Zur zwangläufigen Führung des Punktes b bzw. des Punktes α ist mit dem Gleitstücke c eine Büchse f fest verbunden, in welcher die Stange g gleitet, an deren Ende die Achse des Punktes α des Storchschnabels sich befindet. Das andere Ende der Stange g ist durch Führungsbiichsen h, h¹ mit zwei gleich langen Stangen i, i¹, die um die Punkte k und k¹, immer nur parallel zueinander, drehbar sind, verbunden. Um die Parallelität der Stangen i und i¹ in allen ihren Lagen zu sichern und ihre Führung und die Einstellung der Büchsen h, h¹ zu erleichtern, sind die Stangen i, i¹ mit den um die gleichen Punkte k, k¹ drehbaren Stangen I, I¹ gekuppelt, die unter sich durch eine Stange m verbunden sind.For inevitable guidance of point b or point α , a bushing f is fixedly connected to slider c, in which the rod g slides, at the end of which the axis of point α of the cranesbill is located. The other end of the rod g is connected by guide bushes h, h ¹ to two rods i, i ^{1 of} equal length, which are rotatable around points k and k ¹ , always parallel to one another. In order to ensure the parallelism of the rods i and i ¹ in all their positions and to facilitate their guidance and the adjustment of the bushings h, h ¹ , the rods i, i ¹ with the rods I rotatable about the same points k, k ¹ , I ¹ coupled, which are connected to each other by a rod m .

Durch die Verschiebbafkeit der Büchsen h, h¹ auf den Stangen i, i¹ ist es möglich, die Größe der kurzen Ellipsenachse zu bestimmen; denn 6g der Punkt α sowie auch b und also auch e verschiebt sich in der senkrechten Richtung um die Länge des Durchmessers des von h bzw. h¹ beschriebenen Kreises. Durch Verstellbarkeit der Punkte 0, o¹ des Storchschnabels wird die Größe der langen Ellipsenachse beliebig bestimmt.Because the bushings h, h ^{1 can be moved} on the rods i, i ¹ , it is possible to determine the size of the short axis of the ellipse; because 6g the point α as well as b and thus also e shifts in the vertical direction by the length of the diameter of the circle described by h or h ^1. By adjusting the points 0, o ^{1 of} the cranesbill, the size of the long axis of the ellipse can be determined as desired.

Claims

The axes k and k1 serving as pivot points for the rods i and ί'1 as well as the rods I and Z1 are attached to a rail η which is firmly connected to the guide rail d. The attachment of the rods i and i1 to the guide bushes h takes place in a known manner, for. B. by clamping screws o. The like. In Fig. 3 of the accompanying drawings ίο a further embodiment of the subject invention is shown, which extends the device described above so that the end of the rod g can also be connected to the point e. The point α is then no longer connected to the rod g; instead, the pencil is now with him. With this arrangement, the point α reduces the circular movement of the point e in the horizontal direction. This arrangement has the following meaning: If you fasten the end of the rod g at α, you have to move the points 0 and o1 of the cranesbill close to p and b in order to draw very flat ellipses. However, this 25 'is linked to two restrictions. First, one can only move o1 (or 0) so close to b (or j>) that the length of the lever pieces α ο1, ο1 b is at least slightly larger than the diameter of the circle described by h (or h1); because as soon as the length of these lever pieces is smaller, α can no longer describe a circle as large as h, because a needs freedom of movement in the horizontal direction up to the length of the diameter of the circle to be described. Second, however: if o1 is moved very close to b, then α attacks a very short lever in order to set the cranesbill in motion. The effect of the frictional resistances would be increased considerably, so that drawing would be more difficult and the individual rods would be stressed too much in terms of bending to still be able to effect an accurate transfer. All of this is avoided if, as in the embodiment of FIG. 3, the end of the rod g is attached at e. However, this then happens at the expense of the size of the possible ellipses; for the circle that h or e describes forms the basis for the long axis of the ellipse, not as before for the short axis of the same. Patent-Α N si'rüciie:

1. Pantograph for the distorted transmission of circles, where. a link is inevitably guided in a straight direction, characterized by a slider (c) which can be moved in a groove (d) and which supports the hinge point (b) of the pantograph and a sleeve (f) arranged perpendicular to the groove (d ) for guiding an in it carries a sliding rod (g) to which the tracking pin (h) is attached and which is articulated to the translation point (a).

2. Embodiment according to claim 1, characterized in that the rod (g) is guided by angular links (i, I and i ¹ , 1 ¹ J , the parallelism of which is ensured by a connecting rod (m).

For this purpose ι sheet of drawings.