Geometrical instruments – Scriber – Parallel line
Patent
1994-04-29
1995-12-05
Will, Thomas B.
Geometrical instruments
Scriber
Parallel line
33485, 30293, B26B 2906
Patent
active
054717531
ABSTRACT:
A combination T square and cutter comprising a main segment formed in a long planar rectangular configuration with parallel long side edges and parallel short side edges. The main segment includes a centrally located long rectangular aperture which extends the majority of the length of its long sides. The long side edges of the aperture include an undercut groove. A cross bar is formed in a planar rectangular configuration with parallel short edges and parallel long edges. The central portion of the bar is coupled to the lower surface of the main segment. A slide base is formed in a planar rectangular configuration with parallel long edges, parallel short edges, an upper surface and a lower surface. The short edges of the base are adapted to fit within the grooves in the aperture of the main segment. The base includes a coupling device on its upper surface. A knife holder is formed in a curved boat-like configuration with upwardly extending side walls, one large open end, one smaller closed end, and an open top portion therebetween. The holder is formed in a downwardly angled configuration with the small end positioned at the lower end. The small end also includes a slot extending from its edge downward a short distance. The holder is positioned upon the slide base and includes a coupling device at its lowermost extent which permits rotation and locking of the holder.
REFERENCES:
patent: 1445546 (1923-02-01), Olson
patent: 2835037 (1958-05-01), Middents
patent: 3286351 (1966-11-01), McAlister
patent: 3439426 (1969-04-01), Wilson
patent: 4903409 (1990-02-01), Kaplan et al.
patent: 4949462 (1990-08-01), Spencer
patent: 4979304 (1990-12-01), Sprague
patent: 5033197 (1991-07-01), Irvello
patent: 5083375 (1992-02-01), Helm, Jr.
patent: 5309642 (1994-05-01), McGinnis
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