Geometrical instruments – Straightedge type – With means for moving straightedge over a surface
Patent
1982-03-30
1983-11-29
Little, Willis
Geometrical instruments
Straightedge type
With means for moving straightedge over a surface
33468, 33DIG9, B43L 700
Patent
active
044173997
ABSTRACT:
Device for the calculation of the geometrical characteristics of rectangles for the framing of various objects, usable especially in photography, architecture, industrial design.
This device comprises a plate in which there is formed a preferably square aperture and which carries a graduation indicating a series of ratios between the contiguous sides of rectangles, a ruler mounted for pivoting on the plate and graduated in length, and an element mounted for pivoting on a slider displaceable on the ruler, the element having two perpendicular arms graduated in length, the element being capable of being locked in any desired angular position as a function of the rectangle to be defined.
The invention permits of framing rectangles within predetermined limits, easily and with precision, indicating instantaneously to the user the geometrical characteristics of these rectangles.
REFERENCES:
patent: 881981 (1908-03-01), Watson
patent: 1883628 (1932-10-01), Dreifuss
patent: 2403614 (1946-07-01), Ross
patent: 2822736 (1958-02-01), Padgett
patent: 3835298 (1974-09-01), DeAndrea
patent: 3950853 (1976-04-01), Andrew
Little Willis
Tekno AG
LandOfFree
Device for the calculation of the characteristics of rectilinear does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device for the calculation of the characteristics of rectilinear, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device for the calculation of the characteristics of rectilinear will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-603298