Geometrical instruments – Scriber – Curved line
Patent
1975-06-12
1976-11-16
Aegerter, Richard E.
Geometrical instruments
Scriber
Curved line
33 27C, B43L 706
Patent
active
039914747
ABSTRACT:
The invention comprises a measurement tool. The measurement tool has a pair of elongated main measurement sticks which are slidably mounted to move longitudinally toward and away from one another. The main measurement sticks have indicia thereon to identify the length of the two main measurement sticks. A pair of lateral stick members are pivotally mounted centrally of their length to the outer ends of the main sticks. The laterally stick members have half circle center portions with markings thereon to identify the angular position of the laterally stick members. A measurement stick is slidably mounted to telescope longitudinally inward and outward in one lateral stick member. The slidable stick has a hole at its outer end to receive the point of a pencil whereby the pencil point may be inserted into the hole and the slidable stick and the one lateral stick member may be pivoted about the pivotal axis of the lateral stick and the pencil will draw a circle about said axis or surface beneath the tool depending upon the adjustment of the sliding stick to the one lateral stick member.
REFERENCES:
patent: 378257 (1888-02-01), Leschorn
patent: 1332887 (1920-03-01), Collins
patent: 1366800 (1921-01-01), Hayden
patent: 1601138 (1926-09-01), Moore
patent: 1622158 (1927-03-01), Liberty
patent: 1916638 (1933-07-01), Rizianu
patent: 2042213 (1936-05-01), Ducey
patent: 2686973 (1954-08-01), Christianson et al.
patent: 3751813 (1973-08-01), Kuwada
Aegerter Richard E.
Kleve Robert E.
Shepperd John W.
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