Schlage Lock Company LLC

Richard R Bettger

Jon M Smallegan

Disclosed is a means to provide easily installed and accurately aligned lever spring cage for door hardware locks and latches by in the field installers. The device comprises a pair of posts, selectively arranged and mounted in a mounting plate, having four diagonally arranged key hole shaped bosses which accept the pins and in combination with accurate holes in the spring cage effect both the securing and alignment of the spring cage relative to the mounting plate.

Lever spindle spring cage

The invention comprises a two part key which replaces a conventional key in a conventional lock cylinder for purpose of temporary use wherein one of the parts is a plastic or similar material insert which replaces a portion of the conventional key and a short conplementary key which permits operation of the lock in conjunction with the insert. The insert being secured in the cylinder by means of the cylinder locking pins and being removable only by means of a special installation and extraction tool.

Construction keying

The lever assembly is of two principal parts: a lever with a circular aperture to engage the shank of a door knob, and a retaining plate, for fastening thereof to the lever, having a projecting cog. The cog engages a knob catch slot in the door knob shank. Accordingly, as the lever is rotated/manipulated, it turns the door knob through the engagement of the cog with the slot, and the fastening of the plate to the lever. The assembly accommodates retrofitting thereof to doors having round door knobs.

Growing community of inventors

San Francisco, CA, United States of America

Richard R Bettger