Patent ID: 6276067
Filing Date: 2001-08-21
Classification: B43L

Abstract:
An ellipse drawing/cutting device, comprising:a base plate having a left and a right round cavity symmetrically disposed thereon;a driving gear rotatably mounted to said base plate; anda driven gear rotatably secured to said base plate being in rotary engagement with said driving gear;a longitudinal measurement disc rotatably engaged with said left round cavity;a lateral measurement disc rotatably engaged with said right round cavity;a link bar adapted for linking said longitudinal measurement disc and said lateral measurement disc together so as to permit said discs to act in synchronism with each other;said driving gear and said driven gear in rotary engagement with each other being rotatably secured in place to said base plate between said left and right round cavities with said driven gear in driving engagement with both said longitudinal measurement disc and said lateral measurement disc so as to permit both said discs to rotate in synchronism with said driven gear;a slide bracket assembly rotatably disposed in a central cavity of said lateral measurement disc including a ruler frame and a left slide wing, a right slide wing and a pair of parallel guide tracks;said ruler frame having said right slide wing and said left slide wing removably attached to each longitudinal side thereof being slidably mounted onto said guide tracks of said slide bracket assembly;at each end of said ruler frame being disposed a retaining post so as to permit each end of said link bar to be connected thereto;elongated cover plates removably attached to each longitudinal side of said guide tracks of said slide bracket assembly respectively limitedly restraining said right and left slide wings to slide within said guide tracks of said slide bracket assembly;and a plurality of differently spaced pen insertion holes disposed on said ruler frame, permitting a pen to be selectively inserted in said insertion holes so that ellipses of various sizes can be drawn;a spring biased position retaining pivot arm in selective engagement with said driving gear;a turning knob secured to said driving gear being turned in such a direction that said spring operated driving gear is powered to force said driven gear to rotate whereby both said longitudinal measurement disc and said lateral measurement disc are rotated in synchronism and said ruler frame connected to said longitudinal measurement disc is linearly and circularly moved in synchronism to permit an ellipse of selected size to be drawn.