ates. The (h-ag and side drag beams are supported on elastic, the others on })lain knife-edges. The elastic kind would be preferable in all five cases to insure against sliding or creeping. They are always clean, and are virtually frictionless for the extremely small distortions—less than… … Fig. 2.—Wind balance, front view. propels a sliding weight, without backlash, and bears at its far end a micrometer disk, at its near end a worm wheel actuated by a small motor with double-wound field. This motor rides on the beam and drives the worm wheel by means of a worm on the armature shaft.…
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