DE2353988A1 - Variable bar chart recording instrument - has trace amplitude controlled by adjustable multi-step cam - Google Patents

Abstract

The instrument is pref. for vehicle journey recorders and employs a stylus mounted on an oscillating arm. The arm can be brought into engagement with any one of a number of stepped portions of a rotating cam. The individual cam steps may have the same diameter and different eccentricity or the same eccentricity and different diameters. The cam can pref. be adjusted axially to select a given step for engagement with the stylus arm. The stylus may alternatively be mounted on a spring-loaded carriage which presses against the cam. The instrument is simple in construction and reliable in working being proof against accidental knocks.

Description

DR -ING. DIFL.-INC. M. SO. L> \ PL.-t- * HYS. DR, DiPL.-PHYS.

HÖGER-STELLRECHT-GRIESSBACH - HAECKER

PATENT LAWYERS IN STUTTGART

A 40 391 m

m - 150

23rd October 1973

company

ΜΟΤΟ METER GMBH

7250 Leonberg / Wuertt.

Daimlerstrasse 6

Device for generating an adjustable, variable bar chart

The innovation relates to a device for generating an adjustable variable bar graph in registering measuring instruments, In particular, chart recorders, with a pen arranged on an oscillating carrier, which is on a moving Record sheet makes notes.

Known devices of this type have the disadvantage that they are complicated in their construction, cumbersome and in production are prone to failure during operation. .

The innovation is based on the task, a simple and

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50 98 1 9 / OA90

A 40 391 m

m - 150

23rd October 1973

Fail-safe device for generating an adjustable variable Propose bar graph.

The object is achieved by the way that the carrier of the pen engages a multi-stage, revolving cam, the individual stages of which are optionally in operative connection with the carrier are bringable.

The following description of preferred embodiments of the The innovation serves for further explanation in connection with the accompanying drawing. Show it:

Fig. Γ a first embodiment and

Fig. 2 shows a second embodiment of an innovation according to the invention Contraption.

In Fig. 1, a writing lever 1, which serves as a carrier for a pen 2, is perpendicular to the plane of the drawing directional axis 3 rotatable. The pen 2 is in a known manner against a slowly moved forward in the direction of arrow 4 Record sheet 5 pressed. A spring 6 presses a projection 7 connected to the writing lever 1 against one by one not The drive motor shown is set in circulation cam 8, which is eccentrically mounted on a shaft 9. This will the pen 2 is given an oscillating movement of certain amplitude dependent on the eccentricity of the cam disk, -so that the writing trace designated in Fig. 1 with a is created, when the record sheet 5 advances in the direction of arrow 4.

In Fig. 1, the cam 8 consists of three stages 11, 12, 13, which in turn are each formed by circular disks of the same diameter, between which inclined cylinder surfaces 14, 15

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A 40 391 m.

m - 150;

October 23, 1973 -> -

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are arranged. The individual circular disks are radially opposite one another offset, so that the eccentricity related to the axis 9 of the individual stages is different in each case. Will the Cam 8 shifted in the direction of arrow A, the projection 7 rides from the stage 11 to the stage 12, so that because of the different eccentricity of this stage now that wider bar graph b is recorded. The same applies to level 13, which is part of the even broader bar chart c leads. ·

The multi-stage cam 8 can be "produced in a simple manner." The setting relative to the projection 7 can also be done by moving the shaft 9 and engaging accordingly perform without difficulty. This is how it arises an uncomplicated and tor lings safe device for generation of bar charts with adjustable width.

The arrangement according to FIG. 1 allows the generation of a bar chart of different widths, which is arranged symmetrically to a center line. This is due to the fact that the individual circular disks of steps 11, 12 and 13 each have the same diameter, but different eccentricities. The apparatus shown in Fig. 2 for generating an adjustable variable bar chart corresponds in its basic design, the arrangement according to Fig. 1, however, there are the three stages 21, 22, 23 of the orbiting about the shaft 19 the cam 18 from circular disks of different diameter, with the same eccentricity are arranged on the shaft 19. This creates the writing traces a, b, c recorded on the record sheet 5 in FIG. 23 is pressed. By

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50 98 19/0490

A 40 391 ir,

m - 150

October 23, 1973 -Jr-

Move the cam 18 in the direction of the double arrow B a transition from one to the other writing track is possible,

In the illustrated embodiments, the pen is 2 arranged on a writing lever. A spring-loaded slide is also suitable as a carrier for the pen is pressed in the same way against a multi-stage cam. The writing trace created does not necessarily need the shape a bar chart, but can also have the form of a normal oscillation, the individual oscillations of which are so far are pulled apart so that they are still individually recognizable.

The individual stages of the cams 8, 18 could be a other embodiment of the invention also simultaneously both have different diameters as well as different eccentricities. The steps can also be one of the circular disk have a calibrating form.

509819/0490

Claims (4)

A 40 391 m ra - 150 '"October 23, 19 73 Schutζan 1.) Device for generating an adjustable variable bar chart in recording measuring instruments, in particular Tachographs, with a pen arranged on an oscillating carrier that moves on a Record sheet makes records, characterized in that that on the carrier (1) of the pen (2) a circumferential, multi-stage curve disc (8, 18) attacks, the individual Steps (11, 12, 13; 21, 22, 23) optionally with the carrier (I) -in Operational connection can be brought. 2. Apparatus according to claim 1, characterized in that the individual stages (11, 12, 13) of the cam (8) have the same diameter and different eccentricities. 3. Apparatus according to claim 1, characterized in that the individual stages (21, 22, 23) of the cam disk (18) the same Have eccentricities and different diameters. 4. Apparatus according to claim 1, 2 or 3, characterized in that that the rotating cam (8, 18) is axially displaceable and it can be determined in each case in such a position that a certain step engages the carrier (1) of the pen (2). 509819/0490 Empty since