Retractable plumb and chalk line

Details Retractable plumb and chalk line Retractable plumb and chalk line

1983-01-10

1984-07-17

Haroian, Harry N.

Geometrical instruments

Straightedge type

Cord type

33393, B44D 338, G01C 1510

Patent

active

044597614

ABSTRACT:
The invention contemplates a plumb-indicating and marking tool whereby marking a plumb line on a wall or other structure is a simple one-handed operation, so that the user, who may be in an otherwise precarious position on a ladder, may have one hand free at all times to assure his own personal safety. A casing encloses a reeled chalk line as well as a plumb bob connected to the chalk line, and the reel may be releasably locked for the retracted or for any desired line pay-out condition. Provision is made for fastening the casing to the user's belt, in upside-down condition, whereby selection of payout length is readily accomplished and chalk-dusting of the line is automatic.

REFERENCES:
patent: 1586654 (1926-06-01), Conway
patent: 1928377 (1933-09-01), Hobbs
patent: 2779045 (1957-01-01), Harvey
patent: 3011263 (1961-12-01), Unger
patent: 3016616 (1962-01-01), Matson
patent: 3442025 (1969-05-01), Mathiesen

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