Geometrical instruments – Scriber – Curved line
Reexamination Certificate
2011-03-08
2011-03-08
Bennett, G. Bradley (Department: 2841)
Geometrical instruments
Scriber
Curved line
C033S759000, C033S770000
Reexamination Certificate
active
07900364
ABSTRACT:
Disclosed are an arc-drawing assisting apparatus and a tape measure including the arc-drawing assisting apparatus. The an arc-drawing assisting apparatus, which is disposed at a tape of a tape measure so as to allow a user to draw a circle or an arc by using the tape measure, includes an upper case having a graduation checking part for checking graduations of the tape, the graduations checking part being formed at one surface of an upper portion of the upper case and a center adjusting member which is rotatably assembled with the upper case and includes a lower case having an assembling protuberance, which has a center fixing pin protruding downward, formed at a lower end of the lower case. The an arc-drawing assisting apparatus includes a center adjusting member, which is movably disposed at a tape having graduations formed thereon and is also fixed in the tape when an arc is drawn, a center adjusting assisting member, which is assembled with the center adjusting member and has an angle indicator, and a writing instrument fixing member allowing a writing instrument to be fixed to a front end of the tape so that a circle and an arc in an accurate dimension can be drawn, and they can be drawn at a desire angle.
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Bennett G. Bradley
Mitchell Christopher Paul
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