Automatically retractable chalk and plumb line assembly

Details Automatically retractable chalk and plumb line assembly Automatically retractable chalk and plumb line assembly

1979-04-27

1980-03-11

Phillips, Charles E.

Geometrical instruments

Straightedge type

Cord type

B44D 338

Patent

active

041920783

ABSTRACT:
Automatically retractable chalk and plumb line assembly including a housing having two compartments, one of the compartments being formed with a closable first opening through which chalk is receivable in the one compartment, the other of the compartments being sealed against penetration by chalk from the one compartment, a reel disposed in the one compartment, a line wound on said reel and unwindable so as to extend out of the housing through a second opening formed in the one compartment and means disposed in the other compartment for rewinding the line on the reel.

REFERENCES:
patent: 378022 (1888-02-01), Snedigar
patent: 627057 (1899-06-01), Gavin
patent: 990161 (1911-04-01), Paiste
patent: 1168851 (1916-01-01), Carter
patent: 1272270 (1918-07-01), Jarrio
patent: 1567976 (1925-12-01), Myers
patent: 2749618 (1956-06-01), Landon
patent: 3888010 (1975-06-01), Hyde et al.

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