DE2052078A1 - Compasses or zero compasses, especially in connection with ink drawing implements. - Google Patents

Description

Zirgel or zero circle, especially in connection with Indian ink drawing devices The invention relates to a compass or zero compass, particularly in connection with ink pens to create circles of adjustable diameters Drawings.

Ink fountain pens or writing sets should always be in If possible, stand in a vertical position, since the line width is incorrect when positioned at an angle occur, also the immediate letter of the holder in Sc @ r @@ location is not guaranteed.

The purpose of the invention is therefore to create a circle where de-.l The writing element and also the center needle for the smallest and large circular diameters stand upright inside.

With the compasses and ink fountain pens known today There are adjustment options, the writing insert and the Zentrunlsnadel so to adjust so that they are perpendicular to the paper, but can a certain circle diameter cannot be undershot without inclination of the center needle or (and) writing element are also used for adjustment several steps are necessary.

Even with zero circles, a slant must be used to draw the smallest of circles the pen insert or the center needle must be accepted.

The invention is based on the task of creating a circle the circle diameter can be adjusted by one handle karui and at the same time the vertical position of the writing insert and the center needle is guaranteed, with Smallest and relatively large (depending on the design) circle diameters adjustable meant to be.

The object is achieved according to the invention in that at perpendicular standing fountain pen insert the linkage of the compass is essentially U-shaped urti the writing insert is led around so that the center point is in the zero position comes to stand immediately next to the writing tube of the filler insert, with the Control button of the compass exactly vertically above the center point at the upper end of the compass is arranged.

The setting of the circle diameter to be drawn is done by Rotation of the retaining band connected to the writing insert around a pivot point on the compass rod against the effect of an adjustable friction fit.

By attaching the writing insert retaining band to an axially displaceable, however With the guide tube secured against it, the compass can be either a zero-fall compass or a spring-loaded one Zero circles are executed.

Fine adjustment is possible by using simple gear or worm drives possible.

In the drawing, some exemplary embodiments are shown and are described in more detail in the following.

They show: FIG. 1 Compass in a side view. FIG. 2 The above compass in plan view, the adjustment leg 10 (at the same time the tape of the writing insert) to generate the circle with diameter D.

Compass 3 compasses in the top view with fine adjustment by worm drive.

Fig. 4 case zero circle in the side view Fig. 5 case zero circle In the top view Fig. 6 zero compass with yielding center point (spring-loaded) in side view.

Fig. 7 Section A-B of Fig. 6 Description: The rigid linkage 1 is approximately U-shaped around the pen insert 2 and carries on the lower At the end of the center needle 3, the control button 4. Center needle 3 at the top and control button 4 are perpendicular to each other.

Within the perpendicular part of the rod 1 is the Disk 5 firmly connected to the linkage 1. With the help of the adjusting nut 6 is i, a corresponding frictional engagement via the friction disk 7 (plastic disk, suspension) set between the retaining strap 10 and the linkage 1 and with the lock nut 8 secured.

The ink pen insert releasably inserted in the retaining band 10 2 is exactly vertical.

After turning the tether # 0 by the angle a (Fig. 2) when using the circle (swivel in the center needle 3) the circle old the diameter D.

The trap circle (Fig.4,5) contains the same features as the circle described above, but here the size of the frictional connection is also included Achieved using a clamping screw 11, which is attached to the slotted part of the retaining strap takes effect.

The frictional connection is between the strap 12, and the in one predetermined area axially displaceable, but non-rotatable union tube 13 effective, with the requirement for axial displacement and non-twisting, for example is achieved in that the cap tube 13 a lower end has slots 13 ', in which the center needle 14 mounted in Gest 15 with its protruding Engages at the end of 14 '.

In Fig. 6 and 7 a spring loaded zero caliper is shown, the following one Has peculiarities.

The adjustment of the retaining strap 16 takes place via the union tube 17, which at its upper end with a gear drive 18 for the purpose of fine adjustment is connected, the rough presetting simply by turning the retaining strap 18 can be done by hand.

The necessary frictional connection between linkage 19 and union tube 17 is achieved here with the help of a pressure screw 20, since the jacketed pipe 17 in Area of the pressure screw 20 is slotted longitudinally.

So that the center needle 21 can spring back when the pressure is exerted it is fixed in the Querbokrang 22 of the spring-loaded plunger 23, which in turn is with Sliding wetness in the bore 19 'in the linkage 19 is axially displaceable.

The non-twistability and at the same time the upper and lower travel limit the spring travel is through the slots 19 ″ in the linkage 19 with the aid of the needle protrusion 21 'reached.

The advantages achieved by the invention are that with the simplest Construction even with the smallest circle diameters to be drawn, writing element and center needle stand vertically on the paper that when setting any circle diameter the vertical position is retained, so that favorable fine adjustments are also possible exist over wide setting ranges, that continues the benefits drop or spring-loaded zero circles can be installed, and finally, that the turning handle remains in the center of each circle diameter to be drawn and thus only a turning process, but no tracking process when drawing circles is required.

Claims (9)

Claims (1) Compasses or case-zero compasses, especially in connection with ink fountain pens, as a result marked, because when the pen (2) is vertical, the rod (1,15,19) of the compass is guided around the writing insert (2) in a substantially U-shape, so that in the zero position the center point (3 ', 14', 21 ') immediately next to the writing tube (2') of the crab insert (2) comes. 2 compasses according to claim 1, characterized in that the control button (4) of the compass exactly vertically above the center point (3 ', 14', 21 ') at the upper end of the compass is arranged. 3 compasses according to claim 1u.2, characterized in that the diameter setting of the circle to be drawn by twisting the one connected to the writing insert (2) Retaining strap (10,12,16) around a pivot point (9,9 ', 9 ") on the compass rod (1,15,19) Overcoming an adjustable friction slip is carried out. 4 compasses according to claim 1 to 3, characterized in that the frictional connection in the adjustment joint (9) with the help of friction disks (7) made of plastic, fraying steel clamps o .-. with the help of adjusting nut (6) and lock nut (8) or other lockable ones or lockable setting elements is achieved. 5 compasses according to claims 1 to 3, characterized in that the Frictional engagement in the adjustment joint (9 ') by a slit in the area of the joint Retaining strap (12) is achieved in conjunction with an adjusting clamping screw (11). 6 compasses according to claims 1 to 3, characterized in that the frictional connection in the adjustment joint (9 ") through a slotted union tube (17) on which a pressure screw (20) acts, is achieved. 7 compasses according to one or more of the preceding claims, characterized characterized in that the action as a case zero circle with the help of an axial within limits displaceable, but not rotatable union tube (13) is reached. 8 compass according to claim 7, characterized in that the axial displaceability, however, non-rotatability of union tubes (13) or spring-loaded center bolts (23) Longitudinal slots (13 ', 19 ") are made, in which the mounted center needle (14, 21) is guided will. 9 compasses according to one or more of the preceding claims, characterized characterized in that the fine adjustment with the aid of gear drives (18) or worm drives (24) takes place. L e r s e i t e