Geometrical instruments – Straightedge type – Plural straightedges – relatively moveable
Patent
1993-06-18
1995-01-31
Will, Thomas B.
Geometrical instruments
Straightedge type
Plural straightedges, relatively moveable
33416, 33461, 33463, B43L 710
Patent
active
053849671
ABSTRACT:
A square is disclosed which is especially adapted for the marking of angular dimensions on, or the transfer of angular dimensions from, rafters or other building materials and the like in that only one adjustment is needed to vary the angle being marked or measured. The disclosed square has a first elongate arm, a second elongate arm, and an elongate base having a distal and a proximal end, and a first elongate slot extending longitudinally intermediate its distal and proximal ends. The first elongate arm has a proximal end and a distal end which is pivotally attached to the proximal end of the base. The second has a proximal end, a distal end which is pivotally attached to the proximal end of the first elongate arm, and a second elongate slot extending intermediate its distal and proximal ends for intersection with the first slot. The second elongate arm is slideably moveable along the first slot for its positioning at a select angle with respect to the first elongate arm, and is slideably moveable along the second slot for positioning the first elongate arm at a select angle with respect to the base. An assembly is provided to maintain the second elongate arm at a select position along the first and the second slot.
REFERENCES:
patent: 228027 (1880-05-01), Bissell
patent: 368434 (1887-08-01), Tiller
patent: 622569 (1899-04-01), Van Namee
patent: 738224 (1903-09-01), Morse
patent: 806518 (1905-12-01), Breck
patent: 912605 (1909-02-01), Osmonson
patent: 1040239 (1912-10-01), Rarey
patent: 1473860 (1923-11-01), Mullarkey
patent: 1644624 (1927-10-01), Anderson
patent: 2080792 (1937-05-01), Simmons
patent: 2131279 (1938-09-01), Greve
LandOfFree
Collapsible rafter square does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Collapsible rafter square, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Collapsible rafter square will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1096183