Abstract: A spring balanced lamp is disclosed which includes a base, a lamp arm support pivotally connected to the base, a first pair of hollow tubular arms pivotally connected at one end to the arm support and at their opposite ends to a second pair of hollow tubular arms. At least one counterbalance spring is connected to the arms to maintain the arms in a plurality of stable upright positions to which they may be moved. A lamp head assembly is pivotally connected to the second pair of arms and includes a support neck pivotally connected to the arms and a support ring pivotally mounted on the neck for rotation on an axis which is generally perpendicular to the axis of the pivotal connection of the neck to the arms. A perforated reflector and a translucent shade are mounted on the ring of the reflector.

Abstract: A device for cutting sheet material wound in a cylindrical roll includes a blade member having a cutting edge extending the length thereof, and positioning means extending from the roll of sheet material to the blade member for positioning the blade parallel to the axis of the roll. The positioning means includes a portion thereof distal with respect to the blade in rolling engagement with a surface of the roll to align the roll axis and the cutting edge. In one embodiment, an arm extends from each end of the blade to the roll and a pin protrudes from the arm inside the roll to bear against the inner surface thereof. A bearing, which may be bushing of a diameter substantially less than an inner diameter of the roll, rotates on the pin so that the blade is pendulously suspended from the inner surface of the roll. Graduations are provide on one or both sides of the blade member, and methods are disclosed for using the blade member as a drafting instrument to measure, and to draw horizontal and vertical lines.

Abstract: A modelmaker's miter jig has a work support surface and includes, in one aspect, a recessed rule slideable in a channel formed in the work support surface, and a stop member mounted on the rule and protruding above the support surface. A lock secures the rule and stop so as to register a workpiece in a desired relation to a saw guide. In another aspect, the jig includes a base member dependent from the work surface and having a clamp-engaging face for receiving a clamp to removably mount the jig on a table top. A preferred embodiment is formed as an extrusion.