Abstract: A floor game including tiles which are laid on a playing surface forming a playing area, and an optical instrument. Each tile is covered by a polarized film. A path across the playing area is revealable by utilizing the optical instrument available to a game facilitator. The players see a design on the playing area. A path across the playing area is invisible to players not wearing the optical instrument. Each player traverses the path with assistance of the game facilitator and by observing steps taken by the previous players. The object of the game is for players to discover and traverse the path across the playing area from end to end through a team effort. In an alternative embodiment, the game is played with one or more teams utilizing one or more playing areas with each team trying to complete a path on their respective playing area.

Abstract: Validating a signed program prior to execution time or an unsigned program at execution time. A program is validated by checking the input parameters to the instructions of the program to prevent errors associated with executing an instruction using an invalid input parameter. Both signed programs and unsigned programs are accommodated. A signed program is validated during the signing process, whereas an unsigned program is validated at execution time.

Abstract: A ruler system for measuring workpieces includes a multi-surfaced ruler with rules inscribed along the edges of several surfaces. The ruler contains grooves and T-slots in its surfaces that run along the length of the ruler. In addition, apertures are located in the end surfaces of the ruler. The T-slots and apertures allow several accessories to be attached to the ruler for additional functionality. The accessories include a wheel attachment for drawing parallel lines, storyboard indicators for repeated measurements, a hook rule for measuring from the end of a workpiece, and trammel points for drawing arcs and circles. Connectors may be placed in the grooves of the ruler to link together multiple rulers.

Abstract: A dividing rule that allows the user to divide a workpiece into equal divisions with heightened accuracy and ease. The dividing rule is a plate with pins attached at the corners of the plate which help position the plate on the workpiece. Holes marked with appropriate divisions are located on the plate so that the user, to partition the workpiece into equal divisions, simply marks the workpiece using the holes that coincide with the desired number of divisions.

Abstract: A drainage assembly is disclosed for draining water from the vicinity of a subterranean construction surface, such as a subgrade foundation wall. The assembly comprises a hollow drainage panel formed by a sheet-like base and a filter media, the filter media being spaced apart from the base by a plurality of members that project from the inner surface of the base. The base has at least one hinge, and preferably two closely spaced parallel hinges, extending along its entire length between adjacent side edges, thereby allowing the panel to be easily folded and set into place against a foundation, with the portion above the hinge resting against the vertical foundation wall and the portion below the hinge resting atop the foundtion's horizontal footing. The apparatus further comprises a connector assembly that connects the panel to a standard drain pipe to convey water away from the foundation.

Abstract: A device for pressing and drying organic materials in a microwave oven. The organic material is inserted between two sheets of thin cloth which are, in turn, sandwiched between two thick felt pads. These pads are then sandwiched between platens made from inorganic material. The assembly is placed in a microwave oven and heated, resulting in a pressed and dried organic material.

Abstract: A transparent molded plastic lid for use on an auxiliary trash collection container used with a shop vacuum cleaner or dust collector system that permits inspection of the container contents without removal of the lid.

Abstract: A carpet sample book is constructed from a single sheet of cardboard or other suitable material. The sheet is creased to define a number of panels. The sheet may be folded over itself to make the panels several layers thick. Cutouts are made through some or all of the layers to holding carpet samples. The creases act like hinges which allow the panels to be folded over each other so that the entire assembly can be folded into a compact book.

Abstract: A system for reclaiming carpet components such as yarn, tufting primary, binder, and secondary backing wherein the carpet is sprayed with a high velocity water spray so as to disjoint the components from one another, and thereafter, separating the secondary backing from the yarn and tufting primary. Desirably, water is removed from the disjointed carpet after spraying the carpet with high pressure water spray. This system is useful for reclaiming components of broadloom carpet and carpet tiles and cleanly and efficiently separates tie components of carpet.

Abstract: The invention is a box hinge comprising a pair of identical hinge members pivotably secured by a sequestered pin captured within a bore in each hinge member. The identical hinge members are cylindrical with a rounded end from which a spherical quadrant has been removed and which has been partially and centrally bored. Each bore extends perpendicular to the longitudinal axis of the hinge member and perpendicular to the plane defined by the flat surface of the remaining spherical quadrant. The pin box hinge is formed by inserting one half of the sequestered pin in the bore of each hinge member such that the flat surfaces of both spherical quadrants are coplanar. In an alternative embodiment, the pin sequestration bores are coaxial with the longitudinal axis of the hinge members, which rotate about that longitudinal axis. Jigs for preparing boxes and lids to receive the hinges, and methods of installation, are also disclosed.

Abstract: A carpenter's gauge for use as a marking gauge or a compass includes a compass bar, a pin carrier, and a marking instrument holder. The compass bar is an elongated bar having a slot formed along its center. The pin carrier slides along the compass bar and includes a pin holder and a knob located opposite the pin holder along the compass bar. The pin holder includes a reference surface that lies substantially in line with a pin held by the pin holder. The knob allows the pin holder to be rotated between a first position where the reference surface lies parallel to the compass bar, and a second position where the reference surface lies perpendicular to the compass bar. When the reference surface lies perpendicular to the compass bar, the gauge may be used as a marking gauge or a compass by inserting a marking instrument into the marking instrument holder. Etched markings along the compass bar indicate the distance between the reference surface or pin and the marking instrument.

Abstract: A mechanical pull-through delimber device having opposed semicircular blades urged closed by counter-weights and coupled so that both open when one is pivoted open using a lever.

Abstract: A tool for accurately determining and setting angles using an x beam and a y beam that pivot about a common axis and may be locked in position relative to each other with an axle lock and by locking one leg of each beam to a slotted stabilizer bar. Index holes on the x beam and the y beam receive movable index pins between which measurements are taken. Trigonometric calculation may be used, or a precalculated reference book or data table may be consulted, to determine or set the angle between the x and y beams for various index pins separations, when the pins are located in the various combinations of x and y beam holes. Relatively course linear measurements permit very fine angular measurements and settings.

Abstract: The present invention relates to anionic photoinitiator compounds, compositions containing them, and methods of using them having the structure: ##STR1## wherein X and Y are independently selected from the group consisting of a direct single bond and --C(.dbd.O)--, wherein at least one of X and Y is --C(.dbd.O)--;R.sup.1 and R.sup.2 are independently selected from the group consisting of H and substituted phenyl, wherein both R.sup.1 and R.sup.2 are not H;and wherein neither --X--R.sup.1 nor --Y--R.sup.2 is --C(.dbd.O)H. The anionic photoinitiators have improved storage stability, without loss of photosensitivity, even when stored with polymerizable or crosslinkable monomer, oligomer, or crosslinkable polymer species.

Abstract: A manhole lift insert positioning apparatus consisting of: (1) a threaded nut imbedded in a thermoplastic elastomer molding that fits snugly within a lift insert, and (2) a threaded wing bolt to engage the nut and expand the molding within the insert, thereby locking it in position and drawing the molding against the inside face of the concrete form, thus sealing the insert opening to avoid obstruction of that opening with concrete.