Abstract: A method and apparatus for fluid analysis includes a sensor for determining the index of refraction of a fluid. Advanced methods of fluid analysis relate index of refraction and other measured physical characteristics of the fluid.

Abstract: A method and apparatus for fluid analysis includes a sensor for determining the index of refraction of a fluid. Advanced methods of fluid analysis relate index of refraction and other measured physical characteristics of the fluid.

Abstract: A guard rail for use with linearly-arranged reinforcement bars is provided, the guard rail including a housing for guarding reinforcement bars with the housing including structure for capturing the reinforcement bars therein, and structure on the capturing structure for guiding movement of the capturing structure between a non-secured position and a position wherein the housing is securely maintained in a guarding position over the reinforcement bars extending into the housing.

Abstract: A mold for forming concrete having a bottom, a pair of side walls and a pair of end walls, all of plastic, and with the side walls and bottom being of integral one-piece construction and hinged together by living hinges defined by reduced thickness of the plastic panel. The ends walls are shaped with generally U-shaped channels dimensioned to lock onto the ends of the bottom and side walls whereby a watertight concrete mold is formed. The concrete mold is assembled by pivoting the side walls to an upright position relative to the bottom by means of the living hinges and the end walls are then secured to the bottom and side walls. The mold can be disassembled for removal of a formed concrete specimen by removal of the end walls and pivoting the side walls downwardly to a generally coplanar relation with the bottom to expose the test specimen for removal.

Abstract: A multiple use shim product having plural rows of spaced-apart shims, with the shims being integrally-connected to adjacent shims in the same row as well as adjacent rows by relatively thin and narrow fracturable hinge sections. The shim product is of a one-piece construction formed as a molded sheet of plastic material. Each shim is of generally a horseshoe shape with a space between separated legs. The shims are arranged in adjacent rows wherein separation of two particular rows of shims from the sheet can have the shim spaces opening outwardly from each row of shims and another selection of rows of shims can have the shim leg sections abutting to form an elongate enclosed opening by the combined spaces.

Abstract: A one-piece shim pack having an assembled stack of generally rectangular multi-sided shims, all preferably of the same thickness, which are firmly held together by bonds extending along two adjacent sides of the shims. One or more shims may be peeled from the shim pack to achieve a desired usable height for the shim pack, with removal being achieved by breaking the bond of one or more shims and the unbroken bonds providing sufficient holding power wherein the shims remaining in the shim pack are firmly held together.

Abstract: A lightweight, concrete form having an inner elongate cylindrical member with an internal opening having a cross section to provide the desired shape for a concrete column and a layer of thin stretch film stretched about the inner member to place the inner member in compression and with the ends of the film overlapped for self-adherence.

Abstract: A reinforced fiberboard box for creating a void in and under concrete formations. A single piece of double faced, corrugated fiberboard is defined by a face, a bottom, a pair of end flaps, and a pair of side flaps. The end flaps are folded into at least four uniformly shaped partitions which are subsequently folded onto the face of the fiberboard and are aligned along the longitudinal axis to create a box-like structure. Pairs of side flaps are then wrapped around the sides and top of the partitions to form a completely closed, internally reinforced, box-like structure. A portion of the side flaps are tucked inwardly, intersecting the partitions so that slots in the side flaps interlock with slots in the partitions which prevents the box void from unfolding during use.