Abstract: An apparatus for cutting out strips from a web wound to the shape of a cylindrical roll, includes a carrier, at least two spaced-apart cutting members mounted on the carrier for cutting out the strips between each other, a rotatable core for winding up a web strip cut out by the cutting members, contact members mounted on the carrier for exerting a pressure against an outermost web layer so as to firmly hold the layer in place when moving the apparatus axially along the cylindrical surface of the roll, and a resilient mechanism for providing a relative resilient mobility between the cutting members and the contact members toward or away from the outermost web layer, so as to permit the application of the apparatus against the cylindrical surface of rolls irrespective of varying diameters thereof.

Abstract: A lightbulb socket includes first and second contact members for electrically connecting two conductors and the central and side electrodes on the base of a bulb, and a threaded element for receiving the base of the bulb. The threaded element is held by spring action in a first position in relation to a shell of the socket when the bulb is unscrewed from the threaded element and is movable to a second position in relation to the shell against the spring action when the bulb is screwed into the threaded element. Coupling elements are arranged between the conductors and the contact members to break the contact therebetween when the threaded element is in its first position and to close the circuit to the bulb when the threaded element is brought to its second position. The coupling elements also serve as springs for moving the threaded element to its first position.