Geometrical instruments – Straightedge type – Plural straightedges – relatively moveable
Patent
1985-02-01
1986-07-15
Stearns, Richard R.
Geometrical instruments
Straightedge type
Plural straightedges, relatively moveable
33470, B43L 706
Patent
active
045998060
ABSTRACT:
An improved carpenter's square and protractor which can accurately duplicate a desired angle onto a surface to be cut. Accurate duplication of the desired angle is accomplished by a unique securing of the T-head on a bladed ruler wherein a securing by the draw bolt adjustment is accomplished in a transverse manner with respect to the plane of rotation of the T-head and the ruler member. In order to provide for center location of the draw bolt adjustment, a slide member which receives the ruler member is positioned in an offset manner with angular arm members. The T-head is multifunctional in that it not only provides a simplified protractor function with respect to the ruler but it also affords a supporting wall member onto which projections can be placed so that this device can be utilized to locate the centers of large circular objects. In addition, the T-head can so accommodate a level vial as well as a plumb vial.
REFERENCES:
patent: 506416 (1893-10-01), Colley
patent: 1295180 (1919-02-01), Lowenstein
patent: 1606192 (1926-11-01), Sisson
patent: 2611185 (1952-09-01), Thursack
patent: 3102340 (1963-09-01), Rackleff
patent: 3273246 (1966-09-01), Siberini
patent: 4348815 (1982-09-01), Hurt
patent: 4525933 (1985-07-01), Patterson
LandOfFree
Carpenter's square and protractor does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Carpenter's square and protractor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Carpenter's square and protractor will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1735119