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US 7,640,671 B1Granted
Measuring compass
OwnerYu-Ming Tuinventor
Life of this patent
Estimating the term…
Abstract
A measuring compass is disclosed. The compass comprises a marking leg, a pegging leg which symmetrically form into a shape of a pencil. The upper end of the pegging leg and the marking leg is a center plate or gear module, and the bottom end is a protective cover for protecting the marking leg and the pegging leg. When the compass is not in use, the marking leg and the pegging leg are closed to each other and the protective cover caps the legs. The compass can be inserted to a pocket.
Claims2
A measuring compass comprising:
- a compass head having a lower end formed with a recess and an upper end formed with external threads;
- a marking leg having an upper end fitted in said recess and pivotally connected with said lower end of said compass head, said marking leg having a recess for receiving pencil leads and a covering plate engaged with said recess of said marking leg, said upper end of said marking leg being provided with a plurality of teeth, said marking leg having a lower end engaged with a gripping plate between which is fitted a pencil lead;
- a pegging leg having an upper end fitted in said recess and pivotally connected with said lower end of said compass head, said pegging leg having a recess for receiving pencil leads and a covering plate engaged with said recess of said pegging leg, said upper end of said pegging leg being provided with a plurality of teeth rotatably engaged with said teeth of said marking leg, said pegging leg having a lower end engaged with a gripping plate between which is fitted a positioning peg;
- a handle having an interior formed with a cavity for receiving pencil leads and an open bottom, said open bottom having internal threads engageable with said external threads of said compass head;
- and
- a protective cover adapted to enclose said lower ends of said marking and pegging legs.
3 more elements
Dependencies are inferred from the claim text.