Key and method of manufacture

Abstract From the Canadian patent

An improved key and an improved method of manufacturing the key are disclosed. The key is an assembly of a handle and a blade, which are formed separately from each other. The blade is substantially flat and, includes on each of its opposite sides a plurality of parallel longitudinal lands having forwardly-facing bittings thereon, and a plurality of parallel longitudinal grooves which alternate with the lands and space them apart. The bittings serve to engage transverse rows of axially reciprocatable tumblers in a cylinder lock, and the grooves receive lock wards therein, while the distal end of the blade engages the lock to determine the depth of insertion of the key blade. The blade also …