Geometrical instruments – Scriber – Parallel line
Patent
1982-07-29
1984-06-26
Stearns, Richard R.
Geometrical instruments
Scriber
Parallel line
33 44, B43L 1302, B43K 2700
Patent
active
044557507
ABSTRACT:
A drafting tool is provided to assist in making parallel lines which can be horizontal, vertical or at any angle. The tool has two legs pivoted together and at least one of said legs carries a bar spaced above the drafting paper. The bar carries markers in the form of sharpened metal pins that indent drafting paper, or in the form of writing tips that leave a mark on paper. The bar is resiliently held, and when manually pushed against the drafting paper, the pins indent or the writing tips mark the paper. The draftsman then uses a straight edge to draw lines through the indicia thus made. The pins and writing tips are preferably uniformly spaced in a straight line and the spacing between indicia on the drafting paper with respect to a horizontal or vertical line are variable and are determined by the selected angle between the two legs. Suitable graduations at the pivot can advise the user of the pivot angle to select to obtain the proper indicia spacing with respect to a horizontal or vertical line.
REFERENCES:
patent: 245844 (1881-08-01), Low
patent: 425495 (1890-04-01), Demarest
patent: 509356 (1893-11-01), Bechmann
patent: 964785 (1910-07-01), Johnson
patent: 2551747 (1951-05-01), Ille
patent: 3105305 (1963-10-01), Diffee
patent: 3284911 (1966-11-01), Clark
patent: 3405447 (1968-10-01), Pfeffer
Brelsford Harry W.
Stearns Richard R.
LandOfFree
Drafting tool for parallel lines 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 tool for parallel lines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drafting tool for parallel lines will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2225832