Drawing guide

Details Drawing guide Drawing guide

1986-09-26

1987-07-21

Frankfort, Charles

Geometrical instruments

Scriber

Compound curved and straight-line

33 2703, 33 2705, 33 322, 33 36, 331415, B43L 900, G01B 312

Patent

active

046808647

ABSTRACT:
A first body part having a rubber rim wheel and a second body part having a rubber rim wheel are interconnected by a vertical hinge. The first body part has a pencil holder between its wheel and the hinge and the wheels have distance measurement scales. An angle measurement scale is provided for the hinge.

REFERENCES:
patent: 569038 (1896-10-01), Dow
patent: 724687 (1903-04-01), Floren
patent: 2312136 (1943-02-01), Van Triest
patent: 2325130 (1943-07-01), Harmon
patent: 2543009 (1951-02-01), Frost

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