WEIGHING SCALES; DYNAMOMETER SCALES; MACHINES FOR TESTING PHYSICAL CHARACTERISTICS OF MATERIALS-NAMELY, SIZE, LENGTH, THICKNESS, WEIGHT PER LINEAL DIMENSION, MOISTURE, CONTENT, STRENGTH, RESILIENCY, SPECIFIC GRAVITY, LOCATION OF STATIC AND DYNAMIC CENTER OF GRAVITY; AUTOMATIC CLASSIFYING MACHINES FOR SORTING LIKE OBJECTS BY WEIGHT, SIZE, OR OTHER PHYSICAL CHARACTERISTICS; COUNTING SCALES; AUTOMATIC RECORDING SCALES; MATERIAL PROPORTIONING SCALES; WEIGHT OPERATED AUTOMATIC MECHANISMS FOR CONTROLLING PROCESS STEPS; FLUID FLOW, FEED OF MATERIALS; IMPACT TESTING MACHINES; MACHINES FOR MEASURING CHANGES IN PHYSICAL CHARACTERISTICS OF MATERIALS CAUSED BY PHYSICAL AND CHEMICAL CHANGES THEREIN; PARTS FOR ALL SUCH BEFOREMENTIONED SCALES, MACHINES AND MECHANISMS AND ACCESSORIES THEREFOR-NAMELY, PRINTING MECHANISMS, MAGNIFYING READING DEVICES, RECORDING MECHANISMS, EXTENSION DEVICES, REMOTE AND EXTRA INDICATING MECHANISMS, LOAD RECEIVER DUMPING MECHANISMS, ELECTRICAL MECHANISMS FOR ACTUATING AUXILIARY EQUIPMENT IN RESPONSE TO CHANGES OF CONDITIONS UNDER MEASUREMENT BY SUCH MACHINES, TIME MEASURING MECHANISMS, HEATING EQUIPMENT FOR SUCH MACHINES