DE1031689B - Writing device for echo sounders working with pulses - Google Patents

Description

The invention relates to a further embodiment of the one described in the main patent application Writing device. The essence of the main patent application is that a writing strip of only about 50 mm wide in connection with a very thin writing pen in the order of magnitude 0.05 mm thick and a very small grip pressure of the order of 0.2 g is used and that for the purpose of observing the recording immediately after the measurement, magnifying optics attached to the recorder. To enlarge the recording on the cine film, one is in the observation window of the Writing instrument arranged magnifying glass provided '. With such a device, however, can achieve only a relatively low degree of magnification. To get a higher magnification, According to the invention, the narrow film is used in connection with a projection device. In this case, film strips are preferably used, the recording of which can be observed in fluoroscopy is, so that you can work with a simple device for producing diascope projections can.

To derive an instantaneous display from the recording of the echo depth curve, it is known to project the individual echo recordings enlarged with the aid of optics. The recordings are made by notches in a writing layer with the aid of a stylus to be actuated by the echo, by means of which the sharp writing layer is removed from the transparent base so that the echo recordings appear as light lines when the film is transilluminated. With such a device, a fine and sharp recording, which is necessary in view of the intended magnification and the desired measurement accuracy, cannot be achieved. Also, the stylus has to be conical because of the writing pressure required when scratching, so that it does not escape from the writing trace under the influence of the writing pressure, and after some use the inevitable wear of the stylus results in an increasing width of the writing tip. The use of electrically sensitive writing paper in connection with the possible very thin writing pens and the very small grip pressure is therefore of essential importance for the usefulness of an enlarged projection according to the present invention.

The invention is illustrated using an exemplary embodiment. The drawing shows the display device of an acoustic echo sounder with a cine film 1 as a font carrier. On the film, the feed of which was lowered with a writing device for with pulses
working echo sounders

Addition to patent application A 15714 VIIId / 74d
(Interpretation document 1027 110)

Applicant:

Atlas -Werke Aktiengesellschaft,
Bremen, Stephanikirchenweide 1/19

Dipl.-Ing. Martin Schumacher, Bremen,
has been named as the inventor

occurs right to the plane of the drawing, the echoes are recorded by a current recorder. A contact 2, which is carried by a circumferential band 3 and runs in a regular rhythm across the writing strip 1, is used as a pen, being pulled over the conductive layer of the writing film with light pressure. The electrically conductive layer is applied to a transparent film strip. When the current passes through, the slide is burned away, so that the film becomes transparent at this point. Immediately after the recording point, the film runs through the stage of a projection device. This consists in the usual way of a light source 4, a condenser 5 and an objective 6 with a short focal length, as is also common for reading devices, and a projection screen 7, which is designed as a ground glass.

In order to obtain the sharpest possible images, a very thin write contact is required, as in the main patent application used, which runs over the writing layer with little pressure and is therefore very fine and produces sharp recordings that allow high magnification.

The invention is not restricted to the example shown; rather, there are still a number of modifications and other embodiments are also possible. In particular, the projection device can be different be trained. In the manner of the usual readers, for example, a horizontal guidance of the Use film by applying a reflective mirror. Furthermore, measures are to be taken to avoid undesirable heating of the film

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avoid the light source. Finally, projections can also be generated according to the epidiascope principle. However, the diascope projection offered the advantage of greater brightness. While on the screen an observation of the image on the side remote from the projection is possible, can also be a simple one opaque projection screen can be used, the z. B. as with readers, in horizontal or desk-shaped position is arranged. Finally, it is also possible to transfer the BiHd to one of the measuring device ίο to configure a separate screen.

The writing pen can also be used in the edge area of the Filmbühne work so that the stylus and its records on the screen during the writing process you can see.

Claims (3)

Patent claims 1. Writing device for pulsed echo sounders with a time base Writing pen, which has a continuous writing medium with a conductive layer and a non-conductive layer Cover is guided, with a writing strip of only about 50 mm wide in connection with a very thin writing pen on the order of 0.05 mm thickness and a very small grip pressure on the order of magnitude of 0.2 g is used and for the purpose of observing the recording immediately after the Measurement a magnifying optics is attached to the recording device, according to patent application A 15714 VIIId / 74d, characterized in that a projection device is provided to enlarge the narrow image. 2. Apparatus according to claim 1, characterized by the use of film strips, their recording can be observed in the fluoroscopy, in connection with a device for production of diascope projections. 3. Apparatus according to claim 1 and 2, characterized in that a screen as a screen is provided. Considered publications:
German Patent Nos. 376 578, 403 831, 698, 822 294;
U.S. Patent No. 2,506,500. 1 sheet of drawings 0 809 529/90 5th SS