Abstract: There is disclosed a variety of magnetic ball thrust bearings in use in low friction applications such as anemometers, drills or the like wherein a permanent magnet or other source of magnetomotive force produces a magnetic flux in a closed path which passes through each ball of the ball bearing and attracts the balls and races together. In some embodiments the magnetic flux is also relied upon to produce mutual repulsion between the balls of the bearing thus serving as a magnetic ball cage. In addition to multiple ball and double race bearings, there are disclosed single ball and double socket, fixed ball and single socket, sharpened pivot and socket, and multiple roller; wherein magnetic flux is directed from a rotating shaft into the stationary member through the bearing surfaces and a path of return is provided through a magnetic shunt, a collar bearing, or some combination thereof.

Abstract: There is disclosed a hand tool for drilling or performing other rotational operations on a work piece which is specially adapted for one-hand operation in that it consists of a small handle in which there is rotatably mounted a quill; the quill extends a sufficient distance from the front of the handle to permit it to be rotated between the thumb and forefinger while the handle is held in the palm of the hand with the other three fingers; a gripping surface is provided on the extending portion of the quill, and the quill is arranged to hold concentrically therewith a drill, tap or other tool which may be pressfit or otherwise secured in the quill. In one embodiment the drill or other twist tool is removably secured in the end of the quill by means of a tapered dart fitting a frog with a matching taper in the end of the quill.