Abstract: A portable cutting tool is mounted on the top of a governor chest after the chest cover and valving mechanisms have been removed from the chest. The cutting tool rotates and axially advances a cutting head to cut away the weld material which welds a nozzle to a wall of the governor chest. This permits removal and replacement of the nozzle. The cutting tool is mounted on a mounting plate so as to permit selection of one of several locations as the cutting site, thus permitting use of a single cutting tool to effect the removal of all the nozzles within a governor chest. The cutting head carries two tool bits which cut in annular overlapping paths and the cutting head is recessed so it may pass over a nozzle as a weld is cut. A second cutter head is provided for refinishing the nozzle seats after the nozzles have been removed. Different interchangeable mounting plates permit the cutting tool to be utilized on governor chests of different sizes or having different spacings between nozzles.

Abstract: A drill apparatus including a stationary support frame, a drill carriage mounted on the stationary support frame for movement relative thereto along a generally horizontal path, a drill head mounted on the carriage and having a drill rotatable about an axis paralleling the horizontal path, a work engaging head mounted on the drill head for movement relative thereto along a feed path paralleling the horizontal path of movement of the carriage, and feed mechanism connected to the drill head and to the work engaging head for selectively moving the latter toward and away from the drill head. The drill head and work engaging head are adjustable as a unit in a vertical direction relative to the carriage to vertically position the drill and work engaging head. The relative positions of the work engaging head and drill head are sensed to control the direction and speed of relative movement of the work engaging head relative to the drill head.

Abstract: A cutting head adapted to be manually operated is positioned in relation to a worn bearing so that when the cutting head is rotated with pressure applied in the axial direction against the bearing. The head advances axially along the bearing while rotating and shaves or machines away the worn bearing surface so that a new sleeve may be fitted over the machined surface to provide a new bearing surface of the same diameter and position as the original bearing surface prior to its wearing. In one form the cutting tool is mounted on a spindle inserted into the hollow of the bearing for machining an exterior bearing surface. In another embodiment, the cutting head is on a shaft inserted through the bearing for centering the head. In still another embodiment the cutting head is arranged to advance within a hollow bearing to machine an inside bearing surface. In all embodiments provision is made for stopping the advancement of the cutting head when the proper axial length of bearing surface has been machined.

Abstract: Properly aligned threaded or smooth bores are machined in a pipe boss fla without requiring supplementary staging or makeshift rigs. An expandable holding sleeve is inserted in the throat of the pipe and a mounting unit is brought to rest on the outer surface of the pipe boss flange. A holding sleeve is expanded to engage the pipe and a bracket grips a projection from the mounting unit at a predetermined angular rotation while an extension of the bracket ensures a perpendicular orientation. A vertical feed mechanism mounted on the bracket directs a motor driven drill assembly through holes located in the mounting plate. After the holes and threads are machined in the pipe boss flange, the expandable sleeve is loosened and the unit is removed at a minimal time and effort expenditure.

Abstract: A drilling machine for drilling holes in plaster casts or models has a frame which supports a stationary drilling platform having an opening therethrough. A motor housing is positioned below the drilling platform and is vertically movable between a rest and a drilling position on two laterally disposed top guide shafts and a centrally disposed bottom guide pin. A motor is mounted in the housing and supports a drill chuck and drill bit which penetrates through the opening to drill a hole in a cast or model on the drilling platform when the housing is moved upwardly to its drilling position. A U-shaped handle pivotally mounted on the frame and engageable with the housing permits manual raising of the housing. Alternately, a pneumatic system is described which includes a piston arrangement for raising the housing to the drilling position independently of the position of the handle. During pneumatic operation, the handle may be locked in its rest position.