Patent for a new and improved saw tooth. This design "relates to saws having attachable and detachable teeth held to their places by locking plates or keys inserted, like the teeth, within recesses in the saw-plate; and it consists in a novel construction of the parts, also in combining with the same a spring-bolt, whereby each tooth and its locking key are securely held in position, with facility for detachment when required, and whereby, also, any drawing action, in cutting of the wood on the tooth, tightens the attachment of the tooth" (lines 8-18).