Abstract: A device for cleaning soles of footwear with a plurality of rotatable horizontal brushes. A motor may be used to drive each of the brushes. A tray for collecting dirt and other debris may be located under the brushes in order to provide a convenient method to remove dirt and other debris from the device after use. Such devices may permit a person or persons to clean mud, snow, sand, dirt and the like from the soles of their footwear without need of removing the footwear from their feet.

Abstract: A method and apparatus are disclosed for disconnecting an electrical generator from the domestic single phase electricity supply if one or more of a number of monitored parameters of the domestic electricity supply goes out of a predetermined ragne. The parameters of the domestic electricity supply that are monitored are voltage, frequency and rate of change of frequency.

Abstract: An arterial graft forming package which includes an elongate graft forming porous base member housed within an elongate see-through bag of plastic material having an open end provided with releasable sealing means and finger loops on the outer walls of the bag adjacent the sealing means for disengagement of the sealing means and for holding the bag in open position during use.

Abstract: A corrosion-resistant spinneret, suitable for spinning filaments of poly(p-phenylene terephthalamide) from a viscous solution of the polymer in 98-100 percent sulfuric acid, is prepared from a plate of tantalum alloy or stainless steel which is clad on one face with a layer of pure tantalum. A spinneret blank is formed, counterbores are drilled through the plate and partially into the tantalum layer, the blank is annealed, spinneret capillaries are formed from the counterbores through the tantalum layer to the exit face of the spinneret, the face is polished to remove protrusions, and the face is hardened by heat-treatment in nitrogen. Uniform capillaries having a diameter of about 0.002 inch (0.05 mm) and a length greater than about 0.005 inch (0.13 mm) can be formed in spinnerets without breaking tools used in their production.