The Eastern Company

John J Velinski

John J Crocco

A lock with a keyed removable plug having a substantially cylindrical body, and a plurality of tumblers disposed within the body and movable between a first position retracted within the cylindrical body of the plug and a second position with one end extending from the body. A retaining tab extends radially from the plug body at an angle from the radial orientation of the tumblers. A shell has a substantially cylindrical opening therein for removably receiving the plug in a first shell end. The shell further includes an annular shoulder spaced from the first shell end and engageable by the plug retaining tab and a retaining one of the tumblers when in its second position. Tumbler grooves extend axially along the sides of the shell opening from the first shell end to a groove end short of the shoulder, and a release groove extends axially along the shell opening from the first shell end to the shoulder to define an opening in the shoulder. Engagement of either the retaining tab or the retaining tumbler with the annular shoulder retains the plug in the shell. An operating key engages the tumblers to orient all but the retaining tumbler in the first position to permit pivoting of the plug within the shell with at least one of the retaining tab and the retaining tumbler aligned with the shell shoulder to retain the plug in the shell. A removing key engages the tumblers to orient all of the tumblers in the first position to permit pivoting of the plug within the shell to a removal position in which the retaining tab is aligned with the release groove.

Growing community of inventors

Chicago, IL, United States of America

John J Velinski