Cropping guide

Details Cropping guide Cropping guide

1978-08-23

1979-10-23

Haroian, Harry N.

Geometrical instruments

Miscellaneous

Light direction

33DIG9, 33476, B43L 500

Patent

active

041715730

ABSTRACT:
A cropping guide especially for drawing a proportioned field for use in audio/visual work has three straight edge marking device guides, each with an index associated therewith. The first and second straight edges define a right angle therebetween and the third edge defines a bisector of the right angle to form an angle with the first edge having a cotangent equal to the ratio of the field to be drawn using the cropping guide. The ratio of the index on the first edge to the corresponding index on the second edge is also the same as the field ratio. The index on the third edge is defined by the projection thereon along a line parallel to the first edge, of the index on the second edge.

REFERENCES:
patent: 1330069 (1920-02-01), Fischacher
patent: 2123674 (1938-07-01), Gottlieb
patent: 2403614 (1946-07-01), Ross

Affiliated with

Also associated with

Rating

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

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-405104