Geometrical instruments – Scriber – Curved line
Patent
1971-06-28
1977-06-14
Haroian, Harry N.
Geometrical instruments
Scriber
Curved line
33102, B43L 706
Patent
active
040288145
ABSTRACT:
A graduated, grooved rule and/or graduated slotted and grooved rule member for use in combination with the subcombination head means of combination tool. For example, the subcombination head means of a combination square, the subcombination head means of a bevel protractor; combination head means of a builder's combination tool, square; subcombination head means of a double square; subcombination head means of a reliable try square; subcombination head means of a die maker's square and the like.
This pivoting rule or blade may be substantially pivoted 180.degree. on a short nib or rib, transverse nib or rib, or a substantially spherical faced nib member, one of which is substantially in the head means of the above combination tools for either; presenting a notched-out rule corner portion, or a different rectilinear edge or a different set of graduations and corresponding indicia to at least one side edge of the subcombination head means by substantially pivoting the rule 180.degree. substantially in said head and generally against and around a portion of the nib; or slide and disconnect the head means from this "Pivoting Rule" invention. The above operations are accomplished by having a reversing, pivoting or a turn-around opening, cavity or area in at least one end portion of the groove and/or the slot of a slotted and grooved rule member, and/or in a narrow or wide grooved portion of the rule member.
REFERENCES:
patent: 236469 (1881-01-01), Walters
patent: 282583 (1883-08-01), Starrett
patent: 715703 (1902-12-01), Starrett
patent: 1213578 (1917-01-01), Bodmer
patent: 1525813 (1925-02-01), King
patent: 1984951 (1934-12-01), Stowell
patent: 2296531 (1942-09-01), McQueen
patent: 2448440 (1948-08-01), King
patent: 2489830 (1949-11-01), Stone
patent: 2841879 (1958-07-01), Lanski
patent: 3513548 (1970-05-01), Itano
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