Abstract: In a gage to gage an axially tapered surface on work, the combination comprising first and second gage sections defining an axis, and relatively movable axially; first locaters on the first section to engage the tapered surface at first locations spaced about the axis; second locaters on the second section to engage the tapered surface at second locations spaced about the axis, an indicator plunger on the second section to engage a shoulder on the first section as the two sections are relatively moved, axially; and whereby the amount of subsequent relative movement of the two sections prior to engagement of the second locaters with the work is an indication of work surface taper deviation from a predetermined taper.

Abstract: A method of grinding the bore of a rotary spindle, the bore having a taper, to true the bore while the spindle rotates about a spindle axis, the steps that include providing a support attachable to a base associated with the spindle; providing an angled slide on the support, the slide being movable endwise relative to the spindle and at a predetermined angle to the spindle axis, that angle corresponding to the spindle bore taper; providing a rotary grinder on the angled slide to be movable endwise therewith while the grinder rotates, bodily adjusting the spindle to bring the spindle bore into position to be ground by a grinder as the grinder is moved on the angled slide relative to the bore, and as the spindle rotates; and operating the grinder to grind the tapered bore as the spindle is rotated and as the angled slide is moved endwise, at a predetermined angle.

Abstract: An apparatus for adjusting the grip of a tubular chuck upon work, the chuck receivable in a bore formed by a holder, and comprising a rotatable connector member having first and second thread connections for exerting force transmitted to the chuck; the head connections characterized as differential, whereby as the member is rotated, the chuck closes toward the work, with high mechanical advantage; the chuck defining a first axis; the connector member defining a second axis generally transverse to the first axis, the axes being non-interconnecting.

Abstract: An apparatus for adjusting the grip of a tubular collet upon work, the collet receivable in a bore formed by a holder, and comprising a rotatable connector member having first and second thread connections to the collet and to the holder, respectively; the thread connections characterized as differential, with respect to the collet and to the holder, whereby as the member is rotated, the collet closes toward the work, with high mechanical advantage.

Abstract: In jet pump liquid flow control apparatus the combination comprising an annular body and a liquid flow passage through the body, the passage defining a longitudinal axis; an annular series of flow controlling elements spaced about the axis with successive of the elements having primary portions extending in edge overlapping relation whereby the elements define a flow controlling section of the passage; and control means extending about the axis for controllably urging the primary portions of elements toward the axis thereby to control the cross sectional area of the passage sections.

Abstract: The method of grinding the tapered bore of a rotary spindle, to true the bore while the spindle rotates about a spindle axis, the steps that include providing structure including a master plate having a surface facing the bore, the surface having a predetermined boundary to define a center; providing an angled slide on the structure, the slide being movable endwise relative to the structure and at a predetermined angle to the spindle axis, the angle corresponding to the spindle bore taper; providing a rotary grinder on the angled slide to be movable endwise therewith while the grinder rotates; adjusting the structure to bring the master plate surface into perpendicularity to the axis and to bring the center into coincidence with the axis, and; operating the grinder to grind the tapered bore as the spindle is rotated and as the angled slide is moved endwise.