Abstract: A housing is shaped to mate with a large turret or engine type lathe tailstock. A rack and pinion assembly is mounted within the housing with a chuck attached to an end of the rack. An adjustable hand lever is attached to the pinion and allows the operator to advance the rack and chuck with precision control. The attachment virtually eliminates drill bit breakage.

Abstract: An apparatus for performing various machining operations on the interior surface areas of a large steam valve or the like which includes a value seat ring with a valve seat thereon secured to a valve seat ring step interiorly of the valve body. The apparatus includes a support plate fixedly secured to the open end of the valve body, a drive tube rotatably and axially supported from the support plate, a spider assembly mounted on the inner end of the drive tube and including radially expandable and retractable jaws or centering members for engaging the interior of the valve body to stabilize and support the rotatable drive tube and orient the drive tube concentric with the valve seat or other interior surface areas to be machined. Axial movement of the drive tube is obtained by a lockable rack gear and pinion gear assembly while rotation of the drive tube is accomplished by a worm gear drive arrangement mounted on the support plate and engaged with a bushing connected to the drive tube.

Abstract: A magnetic base drilling machine includes a base having a magnet coil therein and a motor assembly mounted on the base for driving a rotary cutting tool. Electrical circuitry, including switches for applying power to the magnet coil, for reversing the direction of current to the magnet coil, and for controlling the current to the motor are provided for controlling the magnet coil and motor. A user-manipulatable control handle includes a multi-function control cam having cam surfaces that selectively control the switch that applies power to the magnet coil and which physically blocks operation of the motor switch until the magnet coil is energized. Conversely, the magnet coil cannot be de-energized until the motor switch is moved to its off position. If desired, the direction of the electrical current applied to the magnet coil can be reversed to assist in removing the base from a magnetized work surface.

Abstract: A work stand for power operated tools such as, for example, an electrically powered hand drill, with the work stand including a supporting bracket adjustable along a guide column, a guide plate pivotable about a horizontal axis at the supporting bracket, a slide displaceable in a prismatic guide of the guideway, and a machine support carried by the slide. The machine support is adapted to be pivoted around the horizontal axis and is steplessly adjustable around both axes up to a full rotational angle so as to accommodate large rotational moments in a fixed condition. The guide plate and the machine support are each provided with a truncated conically-shaped axle journal accommodated in an associated conical pivot bearing respectively provided at the supporting bracket and the slide.

Abstract: A device for support of a portable router above a work table so as to convert a portable router into a pin router assembly. The device includes a mounting plate which is directly attached to the base portion of the router. The mounting plate is formed integral with a support carriage assembly that is mounted in a housing assembly to permit the router to be smoothly and accurately positioned above the work table in preselected positions. A guide pin is carried in a block assembly that is received in the work table in a manner which permits the adjustment of the guide pin into alignment with the router chuck.

Abstract: A servo system for the rotary spindle of a machine tool in which the spindle is driven by a drive motor through a gear train having shiftable gears for changing the rate of rotation of the spindle. The transducer for the servo system is mounted directly on the motor drive shaft in order to avoid all backlash between the resolver and the drive motor. However, the transducer is arranged to regulate the angular orientation of the spindle and must therefore be maintained in synchronism with the spindle. This is accomplished by arranging the shiftable gears so that when they are moving into engagement with a new gear, engagement with the previously engaged gear is maintained until initial engagement with the new gear is achieved. Further shifting movement into full engagement with the new gear operates to release the previously engaged gear. Thus, during the initial engagement with the new gear, the shiftable gear is momentarily in engagement with both gears.

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: A rotary snapping device arranged so that a vertical motion and snapping rotary motion of a snap can be controlled by a single driving motor to simplify the entire structure and to give an excellent performance and function. This snapping device is provided with a manual operating means which can have the above mentioned vertical motion and rotary motion of the snap performed by hand, a manual adjusting means which can optimumly set the working position of the snap and an indicating means which can indicate the moving position in the vertical direction of the snap.

Abstract: The present invention relates to a tool having a hand operated lever operative with one lever stroke to pivot the tool into position on a work station, to insert a multiple conductor cable in between a pair of clamping and gripping jaws of a metal clamp of an electrical connector to which the conductors are to be connected, and to close the jaws onto the cable. Release of the lever retracts the cable insertion mechanism and pivots the tool away from the work station.

Abstract: A working stand for collarless electrical home worker machines, which machines have at the end of their drive shaft a threaded section for screwing on or attachment of a drill chuck. A machine holder is moveable up and down a vertical polygon guide column and can be fixed in position at whatever desired height. The guide column has a toothing, in which there engages a gear which is driveable by means of a hand crank, the gear being mounted in the machine holder. The machine holder has a pair of adjustable clamping jaws embracing the polygon guide column. In the machine holder a vertical shaft is rotatably mounted, which shaft on the upper end has an axially interior threaded section for reception of the drive shaft of the machine and on the lower end, which end projects from the machine holder, has a threaded section for the screw-on attachment of the drill chuck.

Abstract: A column mount is provided which is particularly useful in a machine tool capable of being assembled to perform either horizontal or vertical machining operations. The mount includes an adjustably movable support member for reciprocating a tool bit head assembly over a given length along a column, the column extending vertically from the machining tool when performing vertical machining operations. The mount operates to allow the head assembly support member to be adjustably reciprocated from a selected starting position on the column above a workpiece, and enables the support member to be readily moved along the column to the desired position.

Abstract: A magnet base drill unit having a finger thereon frictionally engaging the surface of the workpiece to which the base of the drill unit is magnetically adherred. The finger is movable in response to lifting or sliding of the energized magnet base from the support base of the workpiece to actuate a switch for de-energizing the drill motor. The unit also includes a pointed punch adjacent the rear end of the magnet base which can be in one form of the invention impacted into the workpiece support surface either by a manually operated lever or automatically whenever the drill spindle is retracted from the work to a position near the upper end of its stroke. A second punch may be located on the drill unit rearwardly of the automatically actuated punch. The second punch is arranged to be embedded into the support surface of the workpiece by a manually applied hammer blow.

Abstract: A router assembly including a router sub-assembly vertically adjustable relative to a supportive base plate through the utilization of a sub-assembly supported rack gear and a pinion gear meshed with the rack gear and journaled from the base. The base includes a handle portion for horizontal directional control of the router assembly during routing operations and oscillatably supported from the base. Connecting structure operatively connects the handle portion and the pinion gear for oscillation of the latter in response to oscillation of the former, whereby adjustable oscillation of the handle will be effective to vertically adjust the router sub-assembly relative to the base plate.

Abstract: Simultaneous rotation and feed or withdrawal movements are imparted to a shaft carrying a screw tapping element in an automatic thread cutting apparatus by a rack and pinion drive on which is mounted a ramp-shaped cam, the rack and pinion, through a gear train, effecting rotation of the shaft, and the cam through a lever linkage effecting feed or withdrawal of the shaft and tapping element.

Abstract: A Z-axis drive assembly for a turret machining center incorporates a variable speed DC motor mounted on a vertically adjustable carriage and connected through a harmonic drive unit to rotate a pinion. The pinion forms part of a rack and pinion mechanism, for controlling the vertical elevation of the rack relative to the carriage.