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Priority to ES0061813UpriorityCriticalpatent/ES61813Y/en
Publication of ES61813UpublicationCriticalpatent/ES61813U/en
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Publication of ES61813YpublicationCriticalpatent/ES61813Y/en
An improved indicator circle, for the determination of angles, composed of two concentric and unequal circular sheets can be read by the ordinary procedure, looking for the coincidence of an arrow, located in one of them, with the indicator lines in the other, of the divisions in sexagesimal degrees, and the remaining semicircles are divided into circular sectors, variously colored, so that the coincidence - when one of the circles rotates - of sectors of the one with those of the other, of the same or different color, indicate angles of value determined, without the need to resort to ordinary readings in the other semicircles. (Machine-translation by Google Translate, not legally binding)
ES0061813U1957-09-111957-09-11
Improved indicator circle, for angle determination
ExpiredES61813Y
(en)