Abstract: A screw fastened clamping neck attachment for an electrical hand operated drill. The electrical motor of the drill is of the neckless type and has a short rotary shaft extending from the housing. The screw fastened clamping attachment is in the form of two semi-cylindrical bushings adapted to be clamped together at their base portion to form a neck, these bushings, in clamped condition, encasing an extension shaft therebetween which is to be connected to the short shaft of the electrical motor. Preferably the extension shaft has a connecting sleeve end threaded internally with the short shaft threaded externally to provide a threaded connection. Bearings are provided for the extension shaft of the attachment within the semi-cylindrical bushings. Fastening arms extend rearwardly from the bushings to support the attachment on the housing and to resist torsion.

Abstract: A machine tool having an extendable ram carrying a tool at its free end and having a stiffening beam extending along the ram and pivotally connected thereto at an intermediate location.

Abstract: Support apparatus for a movable tool head drive for a machine tool comprising a stand on which is fixed, a table on which is slidably movable, a framework comprising an upper transverse member which supports a movable tool head. The framework is in the form of a closed vertical frame having spaced vertical posts and a lower transverse member mounted below the table, the vertical posts being joined by the upper and lower transverse members to provide the closed configuration of the frame.

Abstract: A special clamping block in combination with a screw clamp fitted with a pair of bores, one bore provided on the top face of the screw clamp and the other bore provided on the outer side face of the screw clamp, the special clamping block having a clamping ring at the end thereof adapted to receive the neck of an electrical hand drill at said end and having a projection plug which fits either into the top face bore of the screw clamp or the outer side face bore whereby the drill may be positioned to the side of the screw clamp or over the top surface thereof.

Abstract: A honing machine for close tolerance sizing of a cylindrical bore in a work piece such as an internal combustion engine block includes a table for supporting the work piece with its cylindrical bore in vertical alignment and a vertical tower structure spanning the table and supporting a trolley for reciprocal movement motor means for driving the honing head being suspended from the trolley by a gimbal mounting. The honing machine is preferably adapted for manual operation, a manual lever and adjustable fulcrum being interconnected together between the vertical tower and trolley for controlling the reciprocating stroke of the honing head, and adjustable stop limiting the downward stroke of the honing head with the weight of the trolley, motor and honing head being counterbalanced to facilitate reciprocating movement of the honing head.

Abstract: An improved machine tool includes an extendible ram or tool support arm. As the ram is extended, the outer end portion of the ram deflects downwardly under the influence of gravity. To compensate for the deflection of the ram, the angular orientation of the ram relative to upwardly extending tracks is changed to raise the outer end portion of the ram. This is accomplished by means of gibs or deflection compensation cams which are moved to rotate a carriage or saddle on which the ram is mounted. The extent of deflection of the ram varies as a function of the distance which it extends outwardly from the carriage. Therefore it is necessary to store data indicative of the deflection of the ram at various degrees of extension and to adjust the orientation of the ram in accordance with this data as the ram is extended. The data indicating the extent to which the ram deflects is stored by means of a cam mounted on the carriage. The cam is read by a transducer which moves with the ram.

Abstract: The bed and upright of a machine tool are made of structural steel tubes which are welded together to form unitary structures. Each of the structural steel tubes is substantially rectangular in cross-sectional shape.

Abstract: A bracket assembly for the spot-facing of holes of difficult access in a workpiece includes a lower generally horizontally disposed support base, an upper elongated hollow member coupled to said base and having a relatively narrow projecting front end which is dimensioned to reach into workpiece recesses of difficult access, and a rotatable main drive shaft and a rotatable tool arbour carried by the upper member spaced from one another. The assembly also includes means for coupling the main drive shaft to the tool arbour to permit the main drive shaft to drive the tool arbour.

Abstract: A horizontal boring mill for machining work at a high rate. The boring mill includes a massive boring bar which carries intermediate its end the boring-tool holder from which boring tools extend radially. The boring bar is rotated by a first drive of sufficient power to enable the boring tool to take a deep cut in the work at a high rate. The boring bar is rotatable on bearings of substantial area; a bearing between the first drive and the bar and bearings on each side of the work. The bar, the first drive and the bearing between the first drive and the bar are moved along the bed of the boring mill by a second drive so that the boring tool engages and cuts the work. The other bearings are secured to the bed and the bar is moved through them. Each bearing on each side of the work carries a facing tool which is rotatable by the bar as the bar is rotated but is not movable with the bar. These bearings may be adjustably secured along the bed so that the facing tool is in position to face the ends of the work.

Abstract: A mechanized contour-following drill machine for drilling and reaming holes in a contoured surface. The machine orienting a drill spindle of a drill assembly perpendicular to a plane tangent to the contoured surface of a work piece so that the center line of the holes drilled therein are perpendicular to the contoured surface.

Abstract: A drill is provided on which the chuck and motor are mounted on a support which moves vertically. Thus the motor rises and falls with the movement of the drill. Also the vertical movement of the drill chuck is controlled by an air cylinder which has mounted axially above it an hydraulic checking cylinder arranged so that checking occurs after an initial unchecked downward movement of the chuck. Automatic and manual operation are controlled by a five port valve in which a piston changing the air direction flow is moved by air blasts directed to each end of the channel in which the piston moves.

Abstract: A multiple spindle inclined drilling machine includes a base having a bed inclined at an acute angle and with guideways upon said bed. A slide is reciprocally mounted upon said ways and is connected to a piston rod of a cylinder assembly mounted upon said base for effecting reciprocal movements thereof. A multiple spindle head is mounted upon said slide. An apertured fixture adapter is mounted upon said bed and lies in a plane at right angles thereto. A rotative drive mechanism is mounted upon said bed and has a variable speed output shaft. A plurality of drive spindles with individually mounted drills is adjustably supported upon and within said head and connected to said drive mechanism. An upwardly and rearwardly inclined fixture mounting plate spans and is secured to said adapter for supporting a workpiece mounting fixture.

Abstract: A drilling machine comprises a ram movable up and down on a carriage slidably mounted on a horizontal crossrail. A toolhead is mounted on the bottom end of the ram for pivotal movement about a horizontal axis at right angles with the crossrail and is pivoted to a desired angular position by a first drive shaft within the ram via bevel gearing. Rotatably mounted in the toolhead for rotation about an axis lying in a vertical plane is a toolholder which rigidly supports a drill and which is driven from a second drive shaft within the ram via bevel gearings. Preferably, the machine further comprises a rack-and-pinion mechanism driven from the second drive shaft for securely but releasably locking a turning tool at the bottom end of the ram, so that the machine can be used also for turning operation as a workpiece is rotated on a turntable. This turntable is of course held stationary during drilling operation.

Abstract: A drill may be fed into a workpiece at a rate where the angle descent is less than the primary relief angle of the drill and wherein the extruding action takes place in 1/3 or less of the drill diameter. Unachieved rates of drill feed speed with high precision may be achieved without punching or crushing the material of the workpiece. In order to accomplish such drilling rates an improved feed mechanism, utilizing a positively driven lead screw is employed. In addition, in order to utilize the high drilling rate, a multiple bank of spindles is devised having an X-Y adjustable configuration used in combination with a worktable translated by a lead screw and nut combination. The lead screw of the worktable is disposed within the worktable in the proximity of the axis of symmetry to the worktable in order to minimize twisting moments to the worktable.

Abstract: The invention relates to machine tool-building and can be successfully utilized in machine tools intended for finishing working of high-precision work, wherein there is necessary to maintain either precise spacing of the axes of openings being bored, or else precise spacing of these axes from the reference bases of workpieces being worked upon. The disclosed machine comprises a framework, a work table adapted to have workpieces secured thereon, mounted on the framework for displacement in the course of a boring operation, and either one or two bridge structures, mounted on the framework, each carrying at least one spindle head with a tool spindle. The housing of the spindle head is secured on the side of the respective bridge structure, facing the work table, the housing of the spindle head being attached so that the axis of the spindle is offset relative to the axis of symmetry of the bridge structure.

Abstract: The present invention relates to a machine-tool having a circular indexing plate, provided at its periphery with jacks adjustable in height, abutting on the foundation of the plate.The stroke of the jacks in the direction of the support surfaces may exceed the horizontal position of the plate without load.The invention is applicable to machine-tools.

Abstract: A lathe bed includes a steel reinforced concrete body with a torsionally flexible frame and means for rigidly connecting the ends of the frame to the body. The frame includes track members for a tool carrier. In one embodiment, the frame is made of two elongated box-like side members and two transverse column guide members, the side members being fixedly attached as by screws to the concrete body and the column guide members being fixedly attached to the side members. In another embodiment, one side member is used and the two column members extend between the side member and a wall portion of the body at the other end. The body is shaped to permit clearance for turnings removed from a workpiece and for a multiple tool magazine. The headstock, feed drive, longitudinal slides and tailstock are mounted on the frame. The body contributes rigidity to the otherwise torsionally flexible frame to produce a rigid and sturdy unitary lathe bed.

Abstract: In a universal milling machine, the workpiece holder table is pivotable about an axis lying above the working surface of the table and in the longitudinal plane of symmetry of the table and is movable longitudinally in a direction parallel to its pivot axis.

Abstract: Precision ball bushings running on pecision shafts provide the basic movement and positioning for both the X and Y axes. For smooth precise operation there must be practically nil deflection of the shafts. To accomplish this, cam followers running on guide bars are provided to carry the load; the guide bars being supported along their entire length. The work bed, which can accommodate 4 .times. 8 foot plates, has replaceable nylon pieces screwed on to steel tubing of the frame assembly. Thus, when the drill penetrates the work, it usually encounters the air space, but if it strikes a nylon piece, there is no adverse affect on the operation, and the nylon may eventually be replaced.

Abstract: A multiple-spindle machine wherein two upright or horizontal frame members support two spaced-apart coaxial carriers for sets of work spindles. Each spindle of one carrier is aligned with a spindle of the other carrier, and the carriers are indexible in synchronism with each other by a mechanism which also serves to move carriages for turning, grinding, milling and/or other types of tools. The carriages are mounted on several elongated guide members which extend between and are connected to the frame members. Each work spindle can be provided with a chuck or collet, or the spindles in one of the carriers may have chucks or collets whereas the spindles of the other carrier support or constitute centers for elongated workpieces. If the workpieces are short, the machine may include a mechanism which transfers workpieces from the chucks of spindles in one of the carriers into the chucks of spindles in the other carrier whereby the workpieces are inverted end-for-end during transport between the two carriers.

Abstract: The attachment has a rotatable spindle and the horizontal boring machine has a headstock rotatably mounting an axially reciprocable headstock spindle. A dog clutch includes a first clutch member rotatable with the attachment spindle and a second clutch member rotatable with the headstock spindle. The attachment is arranged to be bolted to the headstock with the clutch members in axial alignment. Rotation of the headstock spindle is halted in a predetermined angular position, and the headstock spindle is advanced toward the attachment. A releasable member is operable to retain the first clutch member in an angular position in which its teeth are in correct meshing alignment with the teeth of the second clutch member for smooth interengagement of the clutch members responsive to the advance of the headstock spindle.

Abstract: A holding device for a manually portable drilling machine includes a detachable tension element which is attached at two mutually opposite points to a carrier member for the portable drilling machine, the tension element being sufficiently long to encircle at least the horizontal circumference of the object to be drilled at the vertical level of the hole to be drilled. In addition the device includes a resilient bracing means provided between the portable drilling machine and the tension element when the drilling machine is located at a drilling site and the tension element is secured to the carrier so as to be in tension around the object to be drilled.

Abstract: Machine tool structure designed to reduce the noise incident to operation. The invention is illustrated and described as applied to a vertical broaching machine in which the frame structure is modified by supporting the operating components on a vertical slab or thick plate reinforced with longitudinally extending ribs and including an open truss type support rather than the conventional hollow or enclosed columnar frame in common use.

Abstract: A boring machine for large diameter workpieces such as reactor vessels, the machine comprising a horizontally work table, preferably in a pit, a gantry spanning the work table, a boring bar centered at its lower end on the table and at its upper end on the gantry, a drive to rotate the bar and a tool carrier mounted for movement along the bar.

Abstract: This disclosure relates to a mechanism for maintaining alignment between two relatively movable members, specifically platens or supports for retreading molds, although not limited thereto, and includes a pair of generally parallel screws .Iadd.having a common feed mechanism, the screws being fixed to the members against axial movement relative to each other .Iaddend.with .[.means for axially shifting.]. one of the screws .Iadd.being shiftable .Iaddend.relative to the .[.other.]. .Iadd.feed mechanism .Iaddend.to maintain alignment between the two platens or supports.