Patent ID: 9360313
Filing Date: 2016-06-07
CPC Classification: G01C

Claim Text:
1. A compass comprising: a case that comprises a transparent upper plate, a transparent lower plate that faces the upper plate, and a side wall that connects edge portions of the upper plate and the lower plate; a first support shaft that is coupled to the lower plate and protrudes toward the upper plate to have a first pointed distal end; a second support shaft that is coupled to the upper plate and protrudes toward the lower plate to have a second pointed distal end; and a needle comprising a support unit that is disposed between the first support shaft and the second support shaft and comprises a first support groove that is formed close to the first support shaft and a second support groove that is formed close to the second support shaft, a first indicator unit that is coupled to one side of the support unit, and a second indicator unit that is coupled to the support unit to face the first indicator unit with the support unit therebetween, wherein with respect to a plane disposed between the first pointed distal end and the second pointed distal end, the first support shaft is symmetrical to the second support shaft and the first support groove is symmetrical to the second support groove.