Radei--a beam compass

Details Radei--a beam compass Radei--a beam compass

1989-05-17

1991-06-04

Haroian, Harry N.

Geometrical instruments

Scriber

Curved line

B43L 904

Patent

active

050202278

ABSTRACT:
This invention is a beam compass with a new type of adjustable trammel, featuring a polyproplene plastic which eliminates the need for screw or spring loaded clamps and is self locking on beam and is adjusted by merely pushing the trammel plastic where said plastic contacts the top of the beam. This invention also features a unique method of holding a marking member near the end of the beam and this feature also provides a place in the end of the beam to store the sharp point of the trammel when it is not being used.

REFERENCES:
patent: 2474864 (1949-07-01), Roedding
patent: 2608766 (1952-09-01), Theim

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