Abstract: A can opener has a first and a second handle member pivotably connected to be moveable between an open disposition and a closed disposition. They can be squeezed together in one hand of the operator to rotate a drive wheel. A cutting wheel is mounted onto the first handle member. A radially facing aperture is formed through a part of said first handle member so that the drive wheel may partly protrude to engage the rim of the can and press it against the cutting wheel. The drive wheel is mounted rotatably onto a rivet which is held slideably in a slot in the main plate of the first handle member to be moveable towards and away from the cutting wheel.

Abstract: A can opener, comprising first and second handle members, knife means, drive wheel, ratch device and the spring, wherein the said first handle members and the second handle members are pivotally connected about an axis, and a radially facing slot is formed on the first handle members, and also a apporiate protrusion in shape is also formed on the said first handle members; The cutting wheel being rigidly mounted onto the first handle member, The drive wheel partly protruding through said slot, and engages with the said first handle members and and the second handle members through the axis; the ratch device and the spring are disposed above the second handle members as well as under the drive wheel, in which one end of the spring is mounted on the first handle members, and the other end is mounted on the second handle members.

Abstract: A lamp burning a vaporizable oil produces both a steady light and a regularly recurring bright flash. The lamp has a non-combustible wick in a cooled metal tubular wick holder, the upper part of the wick holder being surrounded by an open-topped combustion chamber which extends inwardly towards a pilot flame on the wick. Heating of the combustion chamber induces air flow causing an explosive mixture to form in the chamber; this is ignited by the pilot flame to give a bright flash.