Spring retracted tape measure

Details Spring retracted tape measure Spring retracted tape measure

1982-08-26

1984-04-24

Little, Willis

Geometrical instruments

Area integrators

Electrical

242 848, G01B 310

Patent

active

044439440

ABSTRACT:
In a spring retracted tape measure in which the tape measure is retracted into a housing (1,2) onto a spring biassed drum (3), the ratchet is constituted by teeth (23) formed on the housing and detents (27) on flexible arms (24) on the drum which bias the detents into contact with the teeth (23). A portion (20) of the housing is resiliently connected to the rest of the housing, and can be depressed inwardly to engage the flexible arms (24) thus disengaging the detents (27) from the teeth (23) to permit the tape to be wound in.

REFERENCES:
patent: 1880705 (1932-10-01), Bitner
patent: 1945842 (1934-02-01), Witchger
patent: 4068383 (1978-01-01), Krebs

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