Geometrical instruments – Straightedge type – With means for moving straightedge over a surface
Patent
1988-03-21
1989-04-25
Haroian, Harry N.
Geometrical instruments
Straightedge type
With means for moving straightedge over a surface
33432, 33 2705, B43L 1314
Patent
active
048234753
ABSTRACT:
A drafting device (10) is provided for drawing parallel lines as well as true perspective lines, comprising carriage means (11) movable over a drafting surface (12) on wheel assembly means (20) and (21). A ruler (124) is located on carriage means (11) and has an unobstructed drafting edge (125) constantly co-linear with a true radial line to a chosen vanishing point. Selectively variable ratio transmission means (31), between wheel assembly means (20) and (21), permit ruler (124) to move over drafting surface (12) in a parallel or an arcuate manner about a preset vanishing point on or outside drafting surface (12). Magnet means are included for maintaining wheel assemblies (20) and (21) in frictional contact with drafting surface (12) and brake means are included to lock carriage (11) on drafting surface (12) in selected positions. Presetable stop means are provided to preset a plurality of vanishing points.
REFERENCES:
patent: 2596322 (1952-05-01), Zumwalt
patent: 2694164 (1954-11-01), Geppelt
patent: 2810197 (1957-10-01), Sherry
patent: 2998654 (1961-09-01), Hancox
patent: 3109240 (1963-01-01), Bernier
patent: 3221410 (1965-12-01), Malven
patent: 3226831 (1966-01-01), Tavernier
patent: 3258843 (1966-07-01), Nosser
patent: 3266154 (1966-08-01), Neon
patent: 3300863 (1967-01-01), Pirogow
patent: 3318003 (1967-05-01), Pirogow
patent: 3332152 (1967-07-01), Dru
patent: 3389470 (1968-06-01), Johnson
patent: 3422537 (1969-01-01), Dewey et al.
patent: 3464117 (1969-09-01), Johnson
patent: 3492727 (1970-02-01), Klok
patent: 3596361 (1971-08-01), Pirogow
patent: 3646683 (1972-03-01), Barzee
patent: 3672062 (1972-06-01), Baker
patent: 3718975 (1973-03-01), Ross
patent: 3719995 (1973-03-01), Sauragean
patent: 3783519 (1974-01-01), Sartoria
patent: 3786567 (1974-01-01), Dangay
patent: 3826007 (1974-07-01), Senshu et al.
patent: 3851394 (1974-12-01), Ihms
patent: 3852889 (1974-12-01), Atkins
patent: 3872597 (1975-03-01), Tennant
patent: 3945123 (1976-03-01), Tortorici
patent: 3978587 (1976-09-01), Baugh
patent: 4053987 (1977-10-01), Ram
patent: 4075762 (1978-02-01), Ohtake
patent: 4117599 (1978-10-01), Tavernier et al.
patent: 4137635 (1979-02-01), Harvey
patent: 4159571 (1979-07-01), Jervis
patent: 4254555 (1981-03-01), Julian
patent: 4267656 (1981-05-01), Solomon
patent: 4357757 (1982-11-01), Wurtz
patent: 4360975 (1982-11-01), Wurtz
patent: 4380124 (1983-04-01), Smith
patent: 4453318 (1984-06-01), Hayes
patent: 4565016 (1986-01-01), Horbinski
patent: 4586265 (1986-05-01), Hopkins
patent: 4672749 (1987-06-01), Tamari
LandOfFree
Drafting device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drafting device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drafting device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1186484