Abstract: A machining center convertible between micro and macro machining operations with elimination of reactive spring back infeed pressures in the macro machining mode.

Abstract: The introduction of surgical instruments into an animal body is effected, without tissue incision, by migrating a specially constructed hollow needle into the body behind a rotary augering tool journalled in the hollow needle. Surgical procedures may then be performed with the rotary tool or the same may be withdrawn from the in situ needle and different surgical implements substituted therefor which may be extended beyond the open end of the needle, as required. In the case of unwanted tissue removal, such as blood clots, cataracts and the like; a rotary masticating tool may be brought to the operative site by introduction through the hollow needle, the unwanted tissue masticated or liquefied and the same withdrawn through the needle bore following removal of the masticating tool. Similarly, fluids may be injected into the body and withdrawn therefrom, as required, through the hollow needle.

Abstract: The disclosure relates to method and apparatus for adjusting the V journal profile of a Vee bearing. The purposes are to make possible, in a Vee bearing, the interchange of different cylindrical profiles for rotation and/or reciprocation along a primary journal axis and to expand the range of a conventional Vee bearing function in the use of the same to perform multiple machining operations along spaced, parallel centerlines without the necessity of repositioning either the workpiece or bearing.A vee bearing includes spaced pairs of bearing elements which define a V journal profile and the foregoing is achieved by like movement of all the bearing elements toward or away from the journal axis to adjust the V journal profile.