Abstract: Apparatus for applying pulp to a conductor with a control to operate an adjusting means to vary the amount of pulp fibre in a pulp bath dependent upon signals received corresponding to weight of pulp applied to the conductor whereby the weight is controlled within preset limits. Another requirement is an oven with at least two zones and a moisture measuring and diameter measuring means for pulp issuing from the oven, the latter means controlling the oven zone temperatures to provide a controlled degree of pulp expansion during flash evaporation and a controlled moisture retention in the dried pulp.

Abstract: A method and apparatus for testing the moisture content of pulp insulation on an electrical conductor during the application of the insulation onto the conductor, in which first and second potentials are applied across a pair of voltage dividers having the insulation connected in parallel with each divider at its node, obtaining a measure of the potential at each node, and obtaining the difference between the two measures.

Abstract: A unitary holder for a set of masonry drills, or twist drills generally, provides a main vertical plastic back plate upon the front of which are mounted in parallel open ended cylindrical loops of selected sizes for holding drills or other articles in parallel assembly with their shanks disposed in pockets in line with the loops. The pockets receive the shank ends of the drills and hold the drills with their cutting ends on a common level. The loops hold the intermediate parts of the drills. A transverse horizontal cover flange integral with the back plate extends across the plate at right angles thereto a short distance above the loops. An extension of the back plate above the horizontal flange holds all the drills separately--endwise and sidewise--with minimal play. The main sheet which forms the plastic back is flexible in the region between the flange and the upper edge of the row of loops.