Abstract: This invention relates to on premise display sign cabinets having a main frame and a support frame formed by an extended box beam, the latter being rectangular in cross section, said support frame being disposed along the periphery of the main frame and being of sufficient structural strength to substantially reduce the need for support braces and carrying a plurality of individual slidable clamping assemblies in a raceway at one side of the beam to secure and maintain a polyvinyl chloride sign face under tension sufficient to withstand wind forces exceeding 50 pounds per square foot on the sign face.

Abstract: An electrically conductive strap to be secured to a shoe to ground static electricity accumulated on the body of the person wearing the shoe. The strap consists of an electrically conductive backing, a metallic strip that hooks over the upper edge of a shoe to secure one end of the strap, a pressure-sensitive adhesive coated over the backing and an open mesh scrim applied onto the adhesive which, prior to the application of pressure on the strap, has one surface extending above the adhesive to form a tack-free surface to permit ease of handling prior to use and positioning along the sides and across the bottom of the shoe. The strap adheres to the bottom of the shoe upon pressing the shoe against the floor. The scrim prevents the adhesive from adhering to the side of the shoe as no pressure is applied in this area. Additionally, the strap has a series of transverse rows of perforations so that segments of the strap can be removed to permit the strap to fit various sizes of shoes.

Abstract: Sign having self-storing characters which are quickly changeable. The face of the sign has a patterned array of openings juxtaposed against a contrasting background. The background may be supplied by color contrast and/or by illumination.

Abstract: A sign structure having a copy board which is movable across the face of the structure and which releasably mounts display symbols such as numeric and alphabetic charactrers. The copy board comprises a frame which is mounted to the sign structure via rollers and may be positioned at will along the length of the sign structure adjacent to, overlapping, or removed from a vignette, etc., displayed on the sign face. Retainer bars extend between opposite sides of the copy board frame and are adapted for releasably mounting symbols by engaging slots formed in the symbols. Great flexibility is provided in positioning the symbols, for the copy board frame can be positioned at will along the sign, the retainer bars can be positioned substantially anywhere along the copy board frame in the direction perpendicular to their length, and the symbols can be positioned at will along the length of the retainer bars.

Abstract: Sign having self-storing characters which are quickly changeable. The face of the sign has a patterned array of openings juxtaposed against a contrasting background. The background may be supplied by color contrast and/or by illumination. Shutters are mounted for sliding or pivotal movement for selectively closing the openings so that the remaining exposed background areas define visual information such as symbols or characters. Alternatively, the shutters may be rotatably mounted in the openings and have opposite sides which, respectively, contrast with and match the sign face color.

Abstract: A sign cabinet having a scroll movably mounted on rollers for movement past a display opening in the cabinet. A torsion spring acts on one of the rollers to compensate for differences in the rate of movement of the scroll at the two rollers. An electronic control circuit automatically senses the position of the scroll and is actuated by the position information for controlling the operation of the scroll. The modes of operation include: continuously moving back and forth between preselected end points within the scroll; moving back and forth within a predetermined section within the end points, stopping at preselected frames within the section; and, advancing from one frame or section to another.

Abstract: A portable food serving receptacle capable of heating chilled or frozen food to cooking or serving temperatures and automatically maintaining food at serving temperature. The receptacle consists of thin metallic walls and utilizes a flexible heating element of electrical and thermal insulating material. The heating element is adhered to the metallic walls of an inner dish of the receptacle. The insulating material of the heating element forms a laminated structure in which the electrical resistor is embedded. The walls of the receptacle have a substantially higher thermal conductivity than the laminate. The rate of heat flow from the heating element to the interface of the food and metallic walls of the receptacle is controlled by the thermal insulating characteristics of the laminate so that gradients of heat entering any given point of the food are substantially equal and are maintained at temperature levels below the scorching temperature of the food.