Power returnable coilable rule with improved blade locking assem

Details Power returnable coilable rule with improved blade locking assem Power returnable coilable rule with improved blade locking assem

1982-12-07

1984-05-22

Haroian, Harry N.

Geometrical instruments

Area integrators

Electrical

242 848, 2421072, G01B 3l0, B65H 7548

Patent

active

044493029

ABSTRACT:
A power returnable coilable rule has elongated locking means extending from a lock button on the exterior of the casing to below the blade passage with an aperture thereon adjacent the blade passage and through which the blade extends. A lock element on the lower end of the locking means cooperates with an anvil to press the blade thereagainst and clamp the blade firmly therebetween. Biasing means biases the locking means into the blade locking position, and the lock button is depressible to release the blade during finger pressure and both depressible and movable into a position in which the locking means is releasably engaged to permit free movement.

REFERENCES:
patent: 2240753 (1941-05-01), Bouchard et al.
patent: 2624120 (1953-01-01), Mills
patent: 3041004 (1962-06-01), Busch
patent: 3435529 (1969-04-01), Quenot
patent: 3570782 (1971-03-01), Hayes
patent: 3577641 (1971-05-01), Smith
patent: 3578259 (1971-05-01), Zelnick
patent: 3816925 (1974-06-01), Hogan et al.
patent: 4131244 (1978-12-01), Quenot
patent: 4194703 (1980-03-01), Roe

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