Drafting apparatus

Details Drafting apparatus Drafting apparatus

1980-03-24

1982-05-04

Haroian, Harry N.

Geometrical instruments

Straightedge type

Base attached

33DIG1, 33468, B43L 1302

Patent

active

043274994

ABSTRACT:
The present drafting apparatus comprises a drafting board (1) having secured to one longitudinal edge thereof a metal rail (4). A runner (3) and a rail (2) are displaceable along the metal rail (4). The runner (3) is pulled against the metal rail (4) by magnets. A carriage (6) supporting a ruler (5) having about a square shape, is displaced along the rail (2) and held in place by magnets (43) cooperating with the rail (2) at least the edges of which are made of ferromagnetic material. In order to adjust the rail (2) through relatively small horizontal or vertical angles, the rail (2) is tiltably secured to the runner (3) for adjustment through angles of about 10.degree. to 20.degree., preferably 15.degree. in either direction from the perpendicular position relative to the runner. The tilting movement is transmitted to the rail with the aid of a rod (19) spaced from the journal stud (12) and with the aid of a slide (21) which may be arrested relative to the rail (2).

REFERENCES:
patent: 842585 (1907-01-01), Ross
patent: 2568575 (1951-09-01), Wickman
patent: 2627323 (1953-02-01), Larson
patent: 2836892 (1958-06-01), Nisenson
patent: 3137072 (1964-06-01), Terry

Affiliated with

Also associated with

Rating

Drafting apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Drafting apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drafting apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-875966