Compasses applicable to any smooth surface

The invention discloses compasses applicable to any smooth surface. The pair of compasses comprises a head, a first support leg and a second support leg. The first support leg and the second support leg support the head in hinged manner. The first support leg is provided with a drawing part. The sec...

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Bibliographic Details
Main Authors YANG XUETAI, LUO YANMING
Format Patent
LanguageChinese
English
Published 06.02.2013
Subjects
ACCESSORIES FOR WRITING OR DRAWING
ARTICLES FOR WRITING OR DRAWING UPON
BUREAU ACCESSORIES
PERFORMING OPERATIONS
TRANSPORTING
WRITING OR DRAWING IMPLEMENTS
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Summary:The invention discloses compasses applicable to any smooth surface. The pair of compasses comprises a head, a first support leg and a second support leg. The first support leg and the second support leg support the head in hinged manner. The first support leg is provided with a drawing part. The second support leg is provided with an adjustable positioning mechanism. The adjustable positioning mechanism comprises a sucker and a central pin. The lower end of the second support leg is provided with an adjusting groove with length which extends along the second support leg and is provided with an open lower end. The central pin is telescopically fitted into the adjusting groove. The sucker is rotatably sleeved to the lower opening of the adjusting groove. The center of the sucker is provided with a central hole which the central pin passes through. The compass can be operated very stably without slipping and can be used on any form of smooth surfaces at any position. The sucker replaces a traditional compass pin
Bibliography:Application Number: CN20121418239