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Individual
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Individual
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Priority to ES1971166380UpriorityCriticalpatent/ES166380Y/en
Publication of ES166380UpublicationCriticalpatent/ES166380U/en
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Publication of ES166380YpublicationCriticalpatent/ES166380Y/en
An automatic slate device, which is characterized by a flat box, of appropriate shape and size, topped by a transparent glass sheet, whose box houses inside a quantity of fine dust of a material that adheres easily to the glass, such as aluminum powder, also disposed inside said box a system of pulleys and cords, manually operated by two knobs protruding from the box preferably at the ends of its upper face, and by means of which system and by means of two rods that cross in different planes, through a piece with a tracer point in contact with the glass, it is possible to move it in all directions and start up the fine particles and form different drawings. (Machine-translation by Google Translate, not legally binding)
ES1971166380U1971-02-231971-02-23
AN AUTOMATIC BOARD DEVICE.
ExpiredES166380Y
(en)