Abstract: Apparatus for sensing the profile, spacing and/or alignment of railroad tracks comprising one or more assemblies or pairs of range sensor units, preferably at least one directing a light image upon the top surface of a track rail and at least one directing a similar light image on the lateral side surface of the track rail. Each of the range sensor units includes optical sensing means positioned for receiving only the diffused image reflected upon the associated rail surface along a given axis making preferably a substantial angle to the axis along which the light image is directed upon the rail surface. The axes preferably lie in a plane extending longitudinally of the rail and make a substantial angle to both the vertical and horizontal planes.

Abstract: A weighing scale in which a plurality of load cells support a load-receiving structure and in which a statically determinate restraint system is employed to restrain horizontal movement of the assembly of the load cells and the load-receiving structure.

Abstract: A platform weighing scale in which a reinforced load cell-supported platform structure has a framelike reinforcement cooperating with a load-receiving deck or platform to define a torsion box frame which resists load-induced deflection of the platform between spaced apart load cell support points.FIELD OF INVENTIONThis invention relates to platform weighing scales and is particularly concerned with platform structures which are especially suitably for low profile type platform scales.BACKGROUNDLow profile platform scales for weighing relatively heavy loads are characterized by having a relatively small overall height as measured from the floor or other scale-support surface to the top of the load-receiving platform or deck. Scales of this type are especially suitable for weighing loads which are carted by such vehicles as tote bins, push carts, dollies, fork lift trucks and other usually relatively small motor vehicles.