Geometrical instruments – Straightedge type – Combined with level
Patent
1991-08-19
1993-08-31
Cuchlinski, Jr., William A.
Geometrical instruments
Straightedge type
Combined with level
33471, 33342, 33760, 33414, 33381, 33392, 33399, 33565, B43L 700, G01C 900
Patent
active
052397610
ABSTRACT:
A measuring instrument includes a casing served as a rule, an angular level secured in a central portion of the casing having a rotational protractor rotatably mounted in the level for measuring any angles, a horizontal gauge provided in a right side portion of the casing for checking a horizontality, a vertical gauge formed in a left side portion of the casing for checking a verticality, a reelable plummet provided in the casing and protruded outwardly for checking a vertical line or plane, a measuring tape wound in the casing and pulled outwardly for measuring a length, and a protractor template rotatably secured on the casing having a plurality of guide slots of many geometric shapes punched in the template for guiding the drawing of many geometric shapes and having a plurality of angular graduations circularly formed on a pivotal portion of the template also for measuring planar angles, so as to provide a measuring instrument having multiple measurement uses.
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Hsu Chih-Jen
Wu Chyi-Yiing
Cuchlinski Jr. William A.
Wirthlin Alvin
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