Geometrical instruments – Straightedge type – Cord type
Patent
1978-09-27
1980-04-15
Haroian, Harry N.
Geometrical instruments
Straightedge type
Cord type
B44D 338
Patent
active
041976568
ABSTRACT:
A chalk line dispenser comprising a drive casing and a replacable reel casing, which are joined to form a complete assembly. The drive casing includes a shaft and a coil spring-powered drive therefor, with a thumb-operated lever for releasing a clutch to enable spring reeling of the line. The shaft extends from the drive casing in square cross-section and is engaged by a complementary opening in the reel. The reel casing carries the reel and powdered chalk, and includes a ledge over which the chalkline passes when being reeled into the casing. A squeegee carried on the thumb operator of the clutch release presses the chalkline against the ledge to squeeze any moisture from it, causing same to drop into a moisture sump carried below the ledge. A desiccant may be carried in the moisture sump and/or may be mixed with the powdered chalk itself.
REFERENCES:
patent: 627057 (1899-06-01), Gavin
patent: 2439171 (1948-04-01), Kreider
patent: 2504563 (1950-04-01), Menke
patent: 2589500 (1952-03-01), Landon et al.
patent: 3205525 (1965-09-01), Birtzer
Farr Thomas G.
Galles Stuart L.
Lane Derek
Haroian Harry N.
said Stuart Galles by said Derek Lane
said Thomas Farr by said Derek Lane
Stidham Melvin R.
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