Abstract: The present invention relates to the multi-splindle machining apparatus which carries out machining of the discontinuous surfaces of a plurality of workpieces simultaneously, and in order to restrain the amplification of chattering, oscillation or the like so as to prevent the machining precision from deterioration, the diameters of plural drive pulleys 7a, 7b, 7c connected to a driving motor are finely varied to change at random the rotational speeds which are transmitted from the drive pulleys 7a, 7b, 7c through belts 10 to driven pulleys 8 provided on each machining spindle 3a, thus changing irregularly the timings at which cutting edges 9 of the machining spindles 3a pass the discontinuities such as joint portions s.

Abstract: The drilling unit comprises a cross-piece secured to the base and two carriages supporting said two operating heads and sliding on said cross-piece. The two carriages are each displaced independently of one another along the axis by means of two nut and screw pairs, each of which is associated with one of the carriages. The screw of each nut and screw pairs is actuated by a corresponding reversible electric motor mounted on the cross-piece, whereas the nut is mounted on the corresponding carriage displaced outwards with respect to the head so as to allow the heads to move individually into a common machining zone on the table.

Abstract: The present invention includes an apparatus for preparing a flitch for slicing where the flitch includes a veneer-producing zone and a staylog-engaging zone. The apparatus comprises a drill mechanism for drilling a plurality of holes in the flitch and a mechanism for holding a flitch in a predetermined orientation relative to the drill mechanism. The holes are arranged in a predetermined pattern and extend from a flitch mounting surface to the veneer-producing zone so as to define a boundary between the veneer-producing zone and the staylog-engaging zone. A method for preparing a flitch for slicing comprises the steps of positioning the flitch in a preparing position and forming a plurality of dog-receiving holes in the flitch in a predetermined pattern so that each hole extends through the staylog-engaging zone to the veneer-producing zone.

Abstract: The present invention includes an apparatus for preparing a flitch for slicing where the flitch includes a veneer-producing zone and a staylog-engaging zone. The apparatus comprises a drill mechanism for drilling a plurality of holes in the flitch and a mechanism for holding a flitch in a predetermined orientation relative to the drill mechanism. The holes are arranged in a predetermined pattern and extend from a flitch mounting surface to the veneer-producing zone so as to define a boundary between the veneer-producing zone and the staylog-engaging zone. A method for preparing a flitch for slicing comprises the steps of positioning the flitch in a preparing position and forming a plurality of dog-receiving holes in the flitch in a predetermined pattern so that each hole extends through the staylog-engaging zone to the veneer-producing zone.

Abstract: A multiple spindle drilling apparatus (10) having an eccentric drive link (11), and a primary drive mechanism (12) coupled to the drive link (11) in an eccentric off-set manner. This eccentric off-set causes eccentric circular motion of the drive link (11) about a predetermined radius (R). A frame member (15) is included, as well as a plurality of in-line spindle units (16) rotatably mounted to the frame member (15) for rotation about corresponding spindle axis (17) thereof. An off-set coupling (21) is rotatably mounted between the drive link (11) and respective crank members (20) mounted to corresponding spindle drive shafts (22) to drive the spindle about the spindle axis (17). The coupling (21) is eccentrically off-set from the spindle axis by a radial distance substantially equivalent to the predetermined radius, and further in-phase with the eccentric off-set of the drive link (11).

Abstract: A toolhead assembly for a machine tool generally consisting of a housing supportable on the machine tool and having at least one elongated bore therein, a liner formed of a structural polymer material disposed in the bore, adhesively secured to the housing and having a cylindrical inner wall surface, a spindle shaft journal in the housing and disposed coaxially in the liner for axial displacement therein, the spindle shaft having a head section rigidly mounted on the spindle shaft and engagable in sliding relation to the liner inner wall to provide fluid chambers on either side thereof, means for injecting fluid under pressure selectively into the chambers for axially displacing the spindle shaft, means for spinning the spindle shaft about its axis and means for securing a tool bit to the spindle shaft.

Abstract: A machine tool is provided in which a carriage is supported on the upper flat surface of a work table by first bearings. The carriage extends beyond the bearings in one direction to support a tool, so that the weight of the carriage and tool creates a moment tending to rotate the carriage downwardly toward the work table on one side of the bearings. This is countered by a second bearing that extends to a second downwardly facing surface which may be a separate element or the undersurface of the work table. The second surface is adjustable for parallelism with the work table. Linear actuators move the carriage over the work table. In a multispindle machine, three actuators are required, at least two of which are nonparallel.

Abstract: Apparatus for severing trees, brush, and other forestry at or below ground level in one passage of the apparatus through the forestry includes a plurality of rotatable shafts; a shaft housing for rotatably supporting the shafts with the rotational axes of the shafts juxtaposed and the first ends of the shafts about transversely aligned; a cutting bit connected at the first end of each shaft, each bit having cutting blades which overlap with the blades of the adjacent bits so that the bits cut a continuous, unbroken swath; a rotary power source connected to the shafts for rotating the shafts; a frame for supporting the shaft support; and a vertical actuator, connected between the frame and the shaft housing, for selectably adjusting the elevation of the shaft housing between an elevation at or below ground level to an elevation above ground level.

Abstract: An end effector adapted for attachment to and accurate positioning by a robot is provided for positioning a right angle shaped workpiece at a desired position against a panel and drilling a pair of accurately located positioning holes through the workpiece and the panel. The end effector includes a rear plate having a conventional tool connector and adapter that can be grasped and manipulated by the robot. A frame is cantilevered on the rear plate and supports a shuttle mounted on horizontal linear bearings for lateral motion of the shuttle. A pair of vertical bearings on the shuttle supports two horizontal support plates for vertical motion on the shuttle. A drill and an inserter are mounted on the support plates for lateral motion with the shuttle, and for vertical motion on the shuttle.

Abstract: A drilling machine for drilling securing holes for furniture fittings, for example hinges, includes a drive motor which drives drills by way of a multispindle drilling head with a drill gearing and a plurality of drilling spindles. A stop rule with adjustable stop blocks and a feed device for the feed drill are provided, as well as a press-in die for mounting the furniture fittings on a furniture part. The drilling machine is equipped with a set of replaceable multispindle drilling heads and a set of replaceable stop rules which can be exchangeably fixed to the drilling machine by quick-action clamping devices which can be operated without the use of a tool.

Abstract: A drilling device for boring holes in wood, plastic or metal in precise locations on a work piece, comprising a set of geared together shafts equipped with drilling bits. The bit holder shafts are guided by bearings housed in a frame biased upwardly by springs. The geared together shafts being powered by an electric drill motor.

Abstract: To retool drilling machines having at least two drill spindles with coupling members for drill bits with a different pattern of drilled holes, an adapter is provided including a housing with two mutually parallel input shafts whose distance apart corresponds to the distance between the two drill spindles and whose form is the same as drill bits to be inserted into the two drill spindles. On the opposite housing side, two drill spindles or groups of drill spindles to be connected together by transmission means are arranged which have chuck members for drill bits, of which each or each group is connected in a driving manner with one of the two input shafts.

Abstract: A method of manufacturing a thick-walled small diameter pipe by repeating a process comprising a pipe extension process and a heating process on a pipe to be processed plural times, wherein a machining process on the inner circumferential surface of said pipe to be processed is performed prior to the pipe extension process in the final cycle of said process or a process near the final cycle to remove a black skin layer, cracks and puckers, providing smooth inner surface and excellent proof pressure.

Abstract: A multi-spindle machine tool having separately and vertically movable first and second spindle units which are mounted on a main body thereof movable toward and away from a workpiece. A first vertically movable table is supported by a pair of guide rails provided on a frontal surface of the main body opposing to the workpiece. The first vertically movable table can be ascended and descended by a first actuator. A second vertically movable table is supported by a pair of guide rails provided on a frontal surface of the first vertically movable table opposing to the workpiece. The second vertically movable table can be ascended and descended by a second actuator. The first and second spindle units are fixed onto the first and second vertically movable tables respectively. Thus, the area of the first vertically movable table to be supported by the main body can be set to a relatively large value and the rigidity of the first vertically movable table can be kept effectively.

Abstract: One aspect of the invention is a method of rapidly drilling holes in a workpiece on a drilling machine having first and second spindles holding first and second drill tools, a first and second pressure foot mounted on the first and second spindles and a work table mounted beneath the spindles on which workpieces can be mounted.

Abstract: A puncher comprising two drills held on chucks attached on shafts combined with gears provided in two front seats and a rear seat able to be changed in their position so as to change the distance between the two drills, the front seats and the rear seat being connected with a main seat which is possible to be moved up and down by means of a vertical threaded rod and a support rod so as to lower down the two drills to punch holes in one of many distances adjustable in papers placed on a bottom base and pinched immovable in a pincher on the base.

Abstract: A precision depth spindle is mounted to rotate within a cartridge but is restrained against axial movement with respect to the cartridge. The cartridge is mounted for axial sliding movement within a housing, but cannot rotate with respect to the housing. A tool chuck is fixed to one end of the spindle for movement with the spindle, the tool chuck supporting a cutting tool. A spindle stop is mounted to the tool chuck and can rotate with respect to the chuck. This allows the spindle stop to be maintained stationary while the tool chuck and the cutting tool rotate. The spindle stop is finely adjustable axially with respect to the tool chuck, thus determining the depth to which the cutting tool will enter a workpiece. The cartridge has a limited axial motion range with respect to the housing, and both the spindle and cartridge are urged toward the workpiece with respect to the housing by a suitable spring or pressure means.

Abstract: An in line drilling device for boring holes an equal distance from one another in wood, plastic or metal, comprising a set of geared together shafts equipped with drilling bits. The bit holder shafts are guided by bearings housed in a frame biased upwardly by springs. The fully compressed springs act to limit the extent of projection of the drill bits into a workpiece.

Abstract: A hand-held automatic drilling machine includes an expandable locating collet or locating pin, a pair of adjustably mounted drill bits for simultaneously drilling a pair of spaced-apart openings in a workpiece and a rotary drive motor for the drill bits. The machine also includes a first drive assembly for activating the expandable collet and a second drive assembly for advancing the drill bits into the workpiece. An adjustable dashpot provides resistance to the second drive assembly, thereby controlling the force applied to the drill bits and thus the feed rate. A bi-stable control valve commences the drilling cycle in one state and sequentially activates the first drive assembly and the second drive assembly. A full depth sensor moves the control valve to the opposite state, sequentially deactivating the second drive assembly and the first drive assembly.

Abstract: The invention relates to a device for working plate-shaped members, provided with a frame having means for supporting said plate-shaped members and with tool holders supported by said frame, said tool holders carrying tools intended for working on the plate-shaped members, whereby the tool holders are adjustable independently of each other in two directions extending transversely to each other, at least substantially parallel to the plate-shaped members with respect to the plate-shaped members supported by the frame, whereby conveying means are provided, by means of which the plate-shaped members are stepwise movable, parallel to themselves, in succession with respect to the tool holders in the device at least over a distance substantially equal to the distance over which a tool holder can be displaced in a direction parallel to the intended direction of movement of the plate-shaped members.

Abstract: This hand tool is a portable tool, to be used on a construction site to drill pilot holes for the standard 41/2" hinge used on doors in the majority of commercial buildings. It's light-weight, small and powered by any 3/8" drill motor. Base of tool is used to align the drills in place on the routed out section of door or jamb. The 4 hole configuration the tool has is a standard location used by the main door hinge manufacturers. The main advantage of the tool is the accuracy of the holes drilled. The labor time is cut by 75% over the old conventional way of drilling the holes in the hard wood one at a time for the accommodation of the screws that hold the hinge in place.

Abstract: A guided member is engaged with a guiding member and the guided member and guiding members are movable relative to each other. A pair of planar, parallel guide surfaces on the guide member are engaged by a pair of bearings mounted on the guided member. One of the bearings is resiliently biased into engagement with the guide surface which is less precisely formed so that irregularities in that guide surface or lack of parallelism between the guide surfaces is accommodated by displacement of the biased bearing. The bearings are mounted on bearing supports which depend from either side of a cross piece. The cross piece is secured to the guided member such that a portion of the cross piece is uncoupled from the guided member and is free to be deflected, thus providing the biasing for the biased bearing without transmitting stress to the guided member. Preferably, the apparatus is employed in a machine tool to guide the movement of a worktable.

Abstract: A multiple piercing apparatus for piercing a workpiece having a plurality of reference marks defining the piercing locations. A plurality of adjustably movable piercing unit cases are opposedly arranged on opposite sides of a machine bed. A piercing element, such as a twist drill or punching assembly, is mounted for movement with respect to the unit case to be aligned with a respective reference mark in response to data received from a sensor, such as a camera or photo-sensor.

Abstract: A boring machine provides a pair of motor-driven drills mounted to a template so that the drill chucks are aligned in parallel, side-by-side arrangement in a housing beneath the template. A guide mechanism, including a front plate with a pair of guide holes, is also mounted beneath the template, with a pair of spring loaded guide rods extending from the front plate to the housing. A pair of stops are positioned between the front plate and the housing providing a limit to travel of the front plate.

Abstract: Mobile drilling apparatus enables drilling of a plurality of bores in a building wall or the like, concurrently or sequentially or in groups, for the purpose of attaching slabs, panels, siding or other facing material to the wall or for anchoring concrete reinforcement rods to the wall. In the preferred form, the apparatus includes a mobile vehicle having an operator's platform which may be selectively raised or lowered, a vertical drill support frame carried by the platform which may be shifted sidewardly relative to the platform and a plurality of independently driven drills mounted on the support frame by motor driven telescoping structures which travel the drills outward from the frame. The apparatus expedites construction or renovation of buildings by enabling rapid and precise drilling of arrays of bores.

Abstract: A drill (10) for flexographic plates and negatives includes a table (15) movable in a Y direction under a drill bar (30), and a pin bar (25) movable in an X direction on the table so that negatives can be supported on the table, moved to an appropriate positon underneath the drill bar, and held in place by clamping the table and the pin bar. Drill bar (30) moves up and down and rotates a linear array of hollow spindles (35) holding hollow drill bits (40) for boring a suitable array of holes. The same array bored in the negatives is then bored in a flexographic plate corresponding to each negative, and these are pinned together while the plates are imaged. Drill (10) includes slug rods (32) extending downward through spindles (35) and bits (40) to push out drilled slugs when the drill bar raises. The spindles are preferably rotated by a drive chain (55).

Abstract: A drilling machine operable to drill holes in desired patterns and diameters in circuit boards and similar items and the machine is provided with a base upon which a planar support is movable parallel to the base respectively in directions transverse to each other by power mechanism, an elongated support mounted above the planar support in parallelism therewith and at least one turret-like head is rotatable about the axis of and is supported by the elongated support.

Abstract: The invention relates to a machine tool for multiple surface machining having a work supporting device provided on a base and having a work supporting portion which is freely rotatable and freely adjustable in a vertical position, a slide base freely adjustably movable on the base in a horizontal direction toward and away from the work supporting device, a tool supporting table provided on the slide base, the tool supporting table being freely adjustably movable in a horizontal direction orthogonal to the direction of movement of the slide base, a vertical machining device mounted on the tool supporting table to perform machining from the upper direction on a workpiece that is supported by the work supporting portion, and a plurality of horizontal machining devices mounted on the tool supporting table to perform machining on the workpiece from the horizontal direction.

Abstract: A multispindle-drilling machine for drilling series of holes, in particular in parts of pieces of furniture, includes a drilling head, carrying drilling spindles. Two positioning pins are mounted on the head for displacement relative thereto in directions axially of the pins. The pins are fixable at upper and lower positions relative to the head. The pins are displaced relative to the head and are held by automatic catches upon completion of a drilling operation.

Abstract: A mechanism for individually positioning a drilling head in a multiple head drilling assembly. The assembly includes a plurality of spindle blocks arranged in side-by-side relation, and a spindle that is adapted to carry a drill head is mounted for rotation and axial movement in each block. Each spindle block is mounted for individual lateral movement in a direction normal to the axis of the spindle on guide rods, and is driven laterally by a rotatable lead screw that extends parallel to the guide rods. A recirculating ball nut is associated with each spindle block and is engaged with the lead screw. A clamping mechanism acts to selectively clamp each nut to the respective spindle block and by clamping the nut to the block, the spindle block will be moved along the guide rods on rotation of the lead screw, and by disengaging the nut from the respective spindle block, rotation of the lead screw will cause free rotation of the nut without movement of the block.

Abstract: A gang drill head having a row of drills spaced according to repeated patterns of holes in a tubular member such as a suction roll in a paper-making machine which are clogged and are to be cleared by drilling the same, the drill head being guided for longitudinal movement along a guide member positioned upon the roll for circumferential incremental movement to effect radial movements of the rotating drills for the full circumference of the roll and the head including longitudinal adjustment of individual drill supports in accordance with the spacings of the repeated patterns of holes in the roll. The individual drill chucks are rotated simultaneously and manually controlled linkage causes raising and lowering of the drill head by a fluid-operated unit.

Abstract: A cross slide for receiving and locationally holding an elongate workpiece, such as a picture frame member, is supported upon a carriage which is reciprocally movable along an axis which is parallel to the longitudinal axis of the workpiece. The cross slide is laterally movable to bring the face surface of the workpiece against an adjustable stop carried by the carriage. In response to forward movement of the carriage, the workpiece is intercepted by a rotating cutting tool which cuts an elongate, longitudinally extending slot into the workpiece from the rear surface thereof at a predetermined distance from the face surface regardless of the thickness of the workpiece.

Abstract: An apparatus and process for the continuous cutting of a generally cylindrical rod from soft flexible polymeric foam slabs is disclosed.

Abstract: A drilling machine for use in industrial furniture production includes a drill spindle carrier which is rotatably mounted in a gear block. Two rows of drill spindles are staggered with respect to each other by 90.degree.. Driving pinions of the drill spindles are arranged in recesses of a spacer disk of plastics material, such spacer disk spacing an upper and a lower cover plate of the drill spindle carrier.

Abstract: A replaceable head type multi-spindle fastening apparatus wherein each fastening head is provided with plural driven shafts each connected to a respective fastening member at a lower end thereof and to a connecting member at the upper end thereof. Plural nut runners are provided on a connecting head which is movable up and down to connect the runners with the connecting members. Predetermined ones selected from plural driving shafts connected to the nut runners may be engaged to or disengaged from the respective corresponding driven shafts through the respective connecting members.

Abstract: A machine for boring a hole in a plate workpiece comprises a support, a lower clamp arm carried on this support and having an upper clamp surface adapted to support the workpiece, an upper clamp arm carried on the support and having a vertically displaceable lower clamp surface adapted to press the workpiece down against the upper clamp surface, a lower drill arm pivotal about a horizontal axis on the support and having an outer end provided with an upwardly directed boring tool, and an upper drill arm pivotal about a horizontal axis on the support and having an outer end provided with a downwardly directed boring tool. Respective motors in the support for the machine pivot the arms and rotate the tools.

Abstract: A method of, and apparatus for automatically machining work pieces, wherein a plurality of single spindle units are fixedly attached to a support, and the work pieces are maneuvered in front of the work units by a translatable table. The number of single spindle work units is determined by the formula 2N-1, wherein N is the number of machining operations to be performed on each work piece. As such, there is an odd number of work units thereby creating a central unit which carrys out the last machining operation to be performed in the work piece. The axes of the work units are precisely equally spaced from one another, and this spacing equals the spacing between the work pieces. The apparatus is cyclically operated so that a plurality of work pieces can be worked on simultaneously by individual work units and a new work piece can be loaded when the machining operation is completed on a previously loaded work piece.

Abstract: A multiple spindle boring head including a plurality of boring spindles simultaneously radially positionable relative to a central boring head axis by a plurality of associated lead screws which are mounted for rotation but not translation relative to their respective longitudinal axes, whereby the overall radial extent of the boring head remains constant relative to the boring head central axis as the boring heads are adjusted radially. In one embodiment, a pair of multiple spindle boring heads are mounted adjacent one another on a boring machine equipped with an indexable work table to permit simultaneous operations on two work pieces. A quick change tool support means is disclosed to permit very rapid change of tools in each boring spindle without requiring the use of a positioning jig.

Abstract: A method for making a wheel and a wheel so made is disclosed in which the tire bead seats in the rim are deformed inwardly, the wheel is held by the deformed bead seats, and the bolting surfaces of the web are machined in fixed relation to the bead seats. Preferably, the bead seats are deformed sequentially to work welded metal attachment of a web to the rim, and then place it under compression. Preferably, the bolting surface is machined in the form of a flat cone that is approximately three degrees from planar, and the lug holes are chamfered to place surrounding metal in direct compression, and to deform the conically shaped bolting surfaces into flat engagement with planar surfaces on the hubs on which the wheels are to be installed. A method of determined angularity of the web to the rim is utilized to reject poorly aligned webs before machining the bolting surfaces, and thereby prevent undo thinning of the web, and as a means of product control.

Abstract: Methods and apparatus are provided for handling and threading tubular products, including tubing, pipe, and casing for the petroleum production industry. In one embodiment of the present invention, an improved pipe handling system is utilized to transfer segments of pipe sequentially to a press, a threading machine, and quality control stations. The pipe handling system may include a plurality of plates driven by a common motor for raising and positioning the pipe, V-rollers for supporting and pre-positioning the pipe, a powered cart for transporting the pipe to the threading machine, and a plurality of steady rest assemblies for supporting a joint of rotating pipe during the threading operation.

Abstract: An improved multiple spindle toolhead for a machine tool includes a body having at least one tool-carrying spindle journaled into one side thereof and having an input shaft coupled to the spindle and extending from the body side opposite to the spindle for seating in the machine tool spindle. A plurality of threaded studs extends rearwardly from the body for mating engagement with a plurality of threaded elements seated in the machine tool adjacent to the spindle. Means are provided in the machine tool for rotatably driving the threaded elements relative to the threaded studs on the toolhead body to secure the toolhead against the machine tool.

Abstract: A workpiece such as a steel profile to be perforated at predetermined distances from a longitudinal reference surface thereof is moved past a plurality of perforating tools, such as punching or drill presses, mounted on a main slide and associated with respective sensors carried on an ancillary slide, the two slides being provided with a rack-and-pinion coupling working into a position detector. Each sensor comprises two sensing heads movable, upon selective activation prior to operation of the corresponding tool, transversely to the workpiece path with a slight relative offset; the ancillary slide is displaced until the reference surface is detected by one--but not both--sensing heads whereupon a corrective motion is imparted to the main slide under the control of the position detector.

Abstract: An apparatus for removing temporary side post terminals of at least one multi-celled battery case for lead acid automobile batteries is disclosed. The subject apparatus comprises a horizontal transversely reciprocating work station containing a plurality of milling heads. The work station is also designed to first sense that batteries being operated upon are in a proper position for post removal and then to clamp them in that position until the temporary side posts are machined off by said milling heads. The apparatus further comprises conveyor means adapted to bring the battery cases into the apparatus and then to remove them from the apparatus after the side terminal removal operation is completed. Another feature of the conveyor is a horizontal guide to intercept skewed and misaligned battery cases and to correctly position them against the outer sidewall of the conveyor for proper side post removal.

Abstract: A system for controllably positioning printed circuit boards or the like for the automatic drilling of holes therein. A plurality of individual work positions is provided, together with corresponding work carrier plates having individual or groups of circuit boards affixed thereto. Each work position includes a work table, a drilling machine with associated control equipment, a carrier plate for the circuit boards, and means for supporting the carrier plate and circuit boards above the work table with minimal resistance to lateral movement of the carrier plate and boards. The carrier plates are tied to a central drive system controlled by an automatic control unit in a manner which rigidly maintains close tolerances to lateral movement while permitting vertical displacement relative to the work tables. A master table is included for the drilling of a master template and to prevent displacement errors in the holes to be drilled.

Abstract: Apparatus is provided for carrying, positioning and operating relatively unwieldy machine tools, such as heavy multiple-head drilling assemblies, upon massive flanged work-pieces, such as structural members for bridges, in order to more efficiently perform required operations upon the work-pieces, such as the pre-drilling of girders and their associated splice plates in a fabrication yard prior to field erection of the structure into which they will be assembled.

Abstract: This invention relates to an improvement in the process for improving the impregnability of wood which is pierced on its surface prior to an impregnation procedure by means of solid, circular needles which are guided essentially perpendicularly to said wood surface, without thereby causing chipping or splintering, the improvement comprising using sharp, circular needles with smooth surfaces, rotating about their central axes, and at an essentially constant ratio of the peripheral speed (u) of these needles to their speed of advance (v) with which they drive into the wood.

Abstract: A novel burnishing apparatus and method for burnishing the terminal posts of lead-acid batteries is disclosed. The burnishing brushes are adjustably mounted to service batteries with various terminal posts spacings. After indexing and alignment, each battery to be processed is located and clamped by a battery processing head, after which the burnishing carriage which is slidably mounted thereon is moved relatively towards and away from the battery terminals to bring the burnishing brushes into contact with the battery terminals to effect the burnishing operation. The direction of rotation of the burnishing brushes is reversed when the burnishing brush carriage begins to withdraw from the battery terminals.

Abstract: The invention relates to a machine for drilling and boring tubular plates, the workpiece-carrying elevator being embedded, weight compensation being provided by appropriate means, the machining units moving substantially at ground level opposite thrust tubes bearing on the plate before each machining cycle and absorbing tool thrusts. The machine is characterized by an elevator which supports the plate for machining and which moves on slideways with balancing by hydraulic rams in a constant proportion to the weight of the workpiece being machined. Thrust means retain the thrusts of the spindles, the movements of the latter spindles and means being synchronized by means, the tilting torque produced by the thrust of the spindles is limited by the provision at ground level of a closed framing which interconnects all the constituent elements. The invention is of use for drilling and boring any article, more particularly for the baffle plates of heat exchangers, boilers, water purifiers, heaters and the like.

Abstract: A multiple spindle drilling machine comprising a drilling device attached to a movable attachment stand to drill a web of a wide flange beam, the drilling device including a plurality of drills aligned in the lateral direction of the web, and a shifting device for swinging and shifting the movable attachment stand from a point on a line rectangularly intersecting a flange of the wide flange beam to the point on a line obliquely intersecting the flange of the wide flange beam with one end of the movable attachment stand being as the center.

Abstract: An apparatus for adjusting the vertical position of drills in a multiple spindle drilling machine comprising drills attached in upper and lower two lateral rows to a gear box of the multiple spindle drilling machine, said two groups of the drills being arranged so that the drills of the respective groups can be simultaneously moved in the vertical direction, a motor for driving and rotating the two groups of the drills, a moving device disposed to connect said two groups of the drills so that they are moved in the vertical direction according to the height of drilling positions of a material to be processed, and a positioning device attached to the gear box to regulate the vertical movement of the drills of the respective groups within a certain range and set the vertical position thereof.