Geometrical instruments – Gauge – Circular size
Patent
1992-05-28
1993-05-25
Will, Thomas B.
Geometrical instruments
Gauge
Circular size
33514, 128777, G01B 310, G01B 508, A61B 5107, A61C 1904
Patent
active
052128717
ABSTRACT:
A device for measuring the circumference of a tooth or other object, having a longitudinally extending handle with a first end, a second end, an exterior and a hollow interior. A rotatably mounted head portion is disposed at the first end of the handle, and has an aperture which connects the hollow interior to the exterior of the handle. The head portion is adjustable to locate the aperture at a particular angle with respect to the longitudinal axis of the handle. A band is provided which has two ends and a central portion. The central portion is located exteriorly of the handle and forms a loop to be placed around the tooth or other object. The ends pass through the aperture of the head portion into the hollow interior. A tightening lever is pivotally connected to the handle and the ends of the band for retracting the band through the aperture into the hollow interior, to tighten the loop around the tooth or other object to be measured. A display is mounted on the exterior of the handle and coupled to the tightening lever for indicating the circumference of the tooth or other object to be measured.
REFERENCES:
patent: 855875 (1907-06-01), Bode
patent: 984040 (1911-02-01), Siverling
patent: 1036927 (1912-08-01), Struble, Jr.
patent: 1233131 (1917-07-01), Schwartz
patent: 1772352 (1930-08-01), Huber
patent: 3839801 (1974-10-01), Tappe
patent: 3889382 (1975-06-01), Husted et al.
patent: 4791940 (1988-12-01), Hirschfeld et al.
Copy of operating manual for "Dentometer" manufactured by FROL Corp., Grass Valley, California.
Brochure from FROL Corporation for "The Dentometer".
Fulton C. W.
Will Thomas B.
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