Abstract: An ear plug has a body member, an insert member and a shaft member. The body member has a central bore and the insert member projects into the central bore. A portion of the shaft member is threaded into the insert member and a portion of the shaft member bears against a portion of the bore. Rotation of the shaft relative to the insert causes an enlarged portion of the shaft to bear against the bore of the body member which is flexible and forces the body member to flex outwardly and to bear against the user's ear canal forming a seal against entry of water into the user's ear.

Abstract: A safety lock for jewelry having two free ends connected together by a selected clasp to prevent losing the jewelry should the selected clasp become disconnected comprising a fixed member having a predetermined configuration secured to and extending outwardly from one side of the jewelry adjacent one of the two free ends; and a pivotable member having one end thereof secured to the one side of the jewelry adjacent the other of the two free ends extending from the one side of the jewelry, the pivotable member having a length to span the selected clasp and to have the other end of the pivotable member engage the fixed member in a locked relationship to lock the two free ends together when the selected clasps disconnects.