Abstract: A production facility for the mechanized fabrication of masonry includes a turnover table (6) which receives a plurality of building stones (12) intended for a building-stone course of a wall that is to be produced. The turnover table (6) secures the building stones (12) in place, pivots them together about a horizontal axis (4) running at a distance parallel to the wall (1) to be produced, and transposes them with the top side down. The turnover table (6) can be loaded quickly by a belt (9) and another turnover table (7) for transposing the building-stone course in one piece from the conveyor belt (9) to the other turnover table (6). As a result of the increased output thus effected, the production facility can be integrated into a factory having a plurality of finishing stations for further production stages.

Abstract: A portable wire saw for cutting materials such as stone, concrete, asphalt and the like such as highway lane barriers. The portable wire saw includes a frame having a base on which is mounted a power source. Attached to the base is a plurality of wheels for easy portable movement of the wire saw. At least one of the wheels also provides a pivot point for the frame so that the wire saw can be pivoted between a cutting position and a non-cutting position. The power source drives a wire saw blade carried on a triangular support structure consisting of two pulleys and a drive wheel. The drive wheel is operably connected to the power source. The position of the pulleys is capable of being adjusted relative to the drive wheel. In a preferred embodiment the triangular support structure is arranged in a vertical orientation with the upper pulley functioning to keep the return path of the wire saw blade from having to pass through the material being cut.

Abstract: An improved underground gallery saw useful for the cutting of stone comprised of a supporting base, tracks for moving the supporting base along the stone to be cut, a saw unit raising and lowering system, a plate rotation and pivot system, a saw unit connected to the plate system and an electrical and hydraulic systems to support the operation of the other elements of the system.

Abstract: A rotary cutter saw apparatus (C, B) is movable along an elongated rail element (1). To permit continuous selected longitudinal adjustment of support blocks (8, 34) with respect to a base support suface (S) along the length of elongated rail element (1), an attachment base is formed on the rail element which interfits with a projection-and-recess fit with a portion of the support block. A clamping arrangement (7) can clamp the interengaging projection-and-recess portions together; preferably, they form a dovetail connection, with a movable clamping jaw which clamps both against the attachment base and the support block structure. The support block may include a plate (10), adjustably positioned over the surface by adjustment screw bolts, or a rod or tube element (35), so that the rail element (1) and the cutter element thereon, can also be tilted about the axis of the rod or tube element.

Abstract: An apparatus for cutting a decorative grooved pattern into the surface of hardened concrete, pavement or the like. The patterns are comprised of spaced concentric circles or arcuate segments or spaced linear grooves with or without selectively positioned radial or straight groove segments therebetween and variations and combinations of each. The apparatus includes either a transversely oriented frame-mounted concrete cutting means and/or a longitudinally oriented frame-mounted concrete cutting means. An arcuate tracking arrangement and a linear tracking arrangement are also provided, each connectable to the ground or concrete working surface and, at one end thereof, to the frame. The frame may be manually or drive wheel-propelled as guided by either of the tracking arrangements to produce the above-described decorative grooved patterns in the concrete surface.

Abstract: A concrete saw mounted on a wheeled housing for making a substantially linear cut in the surface of a masonry slab is provided with a dust removal apparatus. The dust removal apparatus includes a blade guard partially surrounding the circular blade mounted for rotation on the side of the wheeled housing and a pivotally mounted funnel mounted on the blade guard. The funnel is telescopically mounted on a portion of the blade guard and extends between the blade guard and the slab being cut. A bottom edge of the funnel is provided with a rounded bearing surface so that it rides on the surface of the slab. A vacuum machine is connected to an exhaust duct of the funnel so that concrete dust generated during the making of a cut is continuously exhausted through the funnel and a flexible hose to the vacuum machine as a cut is being made.

Abstract: A driving device in particular for sawing machines comprises two hydraulically rotatable members (23, 24), which are rotationally connected to each other and one of which is adapted to transmit driving power to a shaft (4). The second rotatable member (24) is connected to a first gear (25) so as to be secured against relative rotation thereto, said first gear being in driving force transmitting relation to a second gear (26), which likewise is arranged to transmit driving power to the shaft. Means (27) are provided to make the device operate in either one of at least two operational states, in a first of which the first member (23) drives the shaft in rotation whereas the second gear (26) and the shaft are free to rotate relative to each other and in a second of which the second gear (26) drives the shaft in rotation whereas the first member (23) and the shaft are free to rotate relative to each other.

Abstract: A marble and tile cutting apparatus and method wherein the apparatus comprises a support, a tray on the support moving between a cutting and a non-cutting position, the motor mounted on the support and rotary cutting blade driven by the motor to cut marble or tile material and wherein the improvement comprises a motor support wherein the motor may be moved laterally on the table support between preselected cutting positions and wherein the tray is characterized by a plurality of generally longitudinally preselected cutting grooves so as to permit the cutting blade to cut the marble or tile material in a cutting position with the grooves of the tray matching the preselected position of the transversely moveable molding and cutting blade for each particular cutting position.

Abstract: A self-propelled apparatus for cutting asphalt and concrete which includes a low voltage electric motor for driving support wheels of a carrying frame supporting an engine for driving a cutting blade. A generator is mounted on the carrying frame and is driven by the engine for generating electric power, with an electronic control being connected to the generator for controlling an output of the generator and the supply of power to the low-voltage electric motor so as to control an operation thereof.

Abstract: A pile cutter support comprises a pair of sections which engage opposing faces of a pile. Platforms integrally extend from the engagement portions in a generally perpendicular relationship so as to form a guide and a support for a cutter. The sections are pivotal between a deployed position wherein the sections are engageable against adjacent faces of the pile and a folded compact carrying mode. A ratchet belt is employed to secure the support at a fixed vertical position of the pile.

Abstract: A chain saw cutting device and method for flush and square cutting walls and other flat concrete surfaces is disclosed. The chain saw cutting device is typically used in conjunction with a track-mounted circular saw cutting assembly, each being removably mounted either on a trolley which rides on, or directly to a track structure, which track structure is attached to the surface to be cut. The chain saw cutting device has an elongated bar and cutting chain which when mounted are positioned in the same cutting line made by the circular saw assembly. The carriage structure of the chain saw cutting device includes a reversible cutting drive and extends on only one side of a cutting plane containing the chain bar and cutting chain. Hence, the chain saw cutting device permits square cutting along the cutting line as well as flush cutting with respect to a perpendicular side wall, ceiling or floor.

Abstract: A stone slab is processed to reduce its thickness far more quickly and with much less difficulty according to an improved method and using a new machine. The machine includes a pair of motor driven sets of disk-shaped saw blades. Each set of saw blades is mounted on a separate, parallel axle. The saw blades are all of a uniform diameter. The saw blades in each set are separated by spacing rings. The sets of saw blades are mounted to reside in parallel planes, and the blades in each set are offset from coplanar alignment with the blades in the other set. A slab of stone to be reduced in thickness is advanced by a conveyor belt beneath the rotating sets of blades along a path parallel to the blades. The blades in the first set cut a number of parallel channels into the upwardly facing surface of the slab leaving ridges corresponding to the gaps between the saw blades in the first set.

Abstract: In order to cut soft concrete before it has completely hardened, or about 12 to 18 hours after finishing, a rotating cutting blade and its drive motor are mounted on a wheeled support platform. The blade extends through a slot in the platform, and also through a skid plate depending from the platform, in order to cut the concrete below the skid plate. The slot and the skid plate are sized to support the concrete as it is being cut and to inhibit cracking and chipping of the concrete during cutting. The slot preferably has as little space as possible between the sides of the slot and the adjacent sides of the cutting blade. An extendable handle allows the device to be used beyond the physical reach of the operator.

Abstract: A fully powered, one man curb cutter is mounted as part of a special purpose trailer, for towing behind a vehicle to its location of use. A motorized and steerable fifth wheel is deployed downwardly from a retracted to an extended position, to raise the trailer tongue clear of the hitch, and is used to propel and steer the trailer into a desired position adjacent a curb to be sawed. A pair of nearside jacks may be deployed adjacent the curb to be sawn, in supporting relation with the saw, the trailer wheels being partially retracted in order to stabilize the system. Sequential adjustments to the trailer jacks and wheels permit setting the power driven saw to a desired angle, with the wheels then being fully retracted. The saw is driven directly from a motor carried inboard, which also powers the saw feed longitudinally along a track mounted on the chassis frame of the trailer.

Abstract: A concrete cutting machine for making parallel precision linear cuts to repair a joint in a concrete floor. A self-propelled vehicle follows a linear track segment accurately positioned with respect to the path of a linear cut to be made in the concrete floor. A carriage supported by the vehicle is vertically positionable with respect to the floor and a table supported by the carriage is horizontally positionable with respect to the vehicle. A cutting blade and motor drive are supported by the table, permitting the blade to be accurately positioned relative to the joint. The cutting blade is enclosed within an enclosure, and may be immersed continuously in a recirculated coolant during cutting of the concrete floor.

Abstract: A sawing machine comprises a housing (14), an arm (3) pivotable relative to the housing about an axis (2), a member (4) on the arm, said member being arranged for connection to a saw tool and being rotatable about an axis spaced from the pivot axis of the arm and generally parallel thereto, means (19) for rotating the rotatable member and means (38) for pivoting the arm relative to the housing, there being in the housing a member (15) having an end portion (16) extending out of the housing and supporting the arm. The member (15) arranged in the housing is secured against rotation relative to the housing and the arm (3) is pivotably journalled about the end portion (16) of the member secured against rotation and extending out of the housing.

Abstract: The wafering machine is provided with a two-piece housing for mounting the spindle of the saw blade. One housing part is mounted on a fixed axis of a support shaft while the other part is pivotally mounted relative to the first housing part about a pivot axis perpendicular to the support shaft axis. Locking screws are provided to fix the two housing parts together while adjustment blocks with adjusting screws are provided to carry out a rotational adjustment of the rotatable housing part. Rotation of the housing part causes the axis of the spindle to be brought into alignment with the fixed axis of the pivotal cutting motion such as to maintain the plane of the cutting portion of the saw blade parallel to the pivotal cutting motion.

Abstract: A quick release mechanism for disengaging the cutting blade of a masonry saw is disclosed. Rotation of a threaded shaft to achieve axial movement through a closed partially threaded split collar lowers the cutting tool onto the work surface via a counterpivot mechanism which simultaneously compresses a gas spring. Only one half of the collar has threads complementary to those of the threaded shaft and pivots away from an opposing fixed unthreaded collar portion. Upon actuation of a release device, the threaded portion of the split collar pivots to an open position to disengage the threaded shaft whereby reverse axial movement of the threaded shaft and resultant upward disengagement of the cutting tool occur as the gas spring decompresses.

Abstract: A marble and tile cutting apparatus and method wherein the apparatus comprises a support, a tray on the support moving between a cutting and a non-cutting position, the motor mounted on the support and rotary cutting blade driven by the motor to cut marble or tile material and wherein the improvement comprises a motor support wherein the motor may be moved laterally on the table support between preselected cutting positions and wherein the tray is characterized by a plurality of generally longitudinally preselected cutting grooves so as to permit the cutting blade to cut the marble or tile material in a cutting position with the grooves of the tray matching the preselected position of the transversely movable molding and cutting blade for each particular cutting position.

Abstract: An improved suspension system for a mobile machine adapted to work a material associated with a horizontal surface includes a frame mounting a prime mover. An arbor shaft extends transversely across the frame adjacent to a front end of the machine and is drivingly connected to the prime mover. The suspension system includes a live rear axle and a front axle assembly that is extendable and retractable whereby the machine is movable between raised and lowered positions. A rotating tool is mounted on the arbor shaft. Lowering the machine from its raised position engages the tool with the material. The improvement to the suspension system comprises a support device for providing extra support to the frame when the machine is in its lowered position, the support device being adapted to stabilize the machine when the tool exerts an upward reactionary force on the machine front end.

Abstract: Method and apparatus for cutting a cylindrical material formed of silicone or the like which is an original material to produce semiconductor devices, using a rotary blade. In the cutting method, the base end side of the cylindrical material is fixed and at the same time, before the cutting of the cylindrical material is started, the cutting side of the cylindrical material is also fixed according to the shape thereof. The cutting is performed while maintaining such fixed conditions until the cutting is completed.

Abstract: An apparatus for collecting wafers sliced from a semiconductor crystal rod, and the apparatus includes a primary mobile member, a secondary mobile member and a wafer collection assembly. The primary mobile member is movable toward and away from the crystal rod, and the secondary mobile member is mounted on the primary mobile member and is movable relative to the primary mobile member in a direction toward and away from the semiconductor crystal rod. The wafer collecting assembly is mounted on the second mobile member for collecting the wafers sliced from the semiconductor crystal rod.

Abstract: A cutting system for cutting heavy stone slabs wherein the heavy slabs are supported in a fixed horizontal position by means of a plurality of apertures which are adapted to receive a plurality of rollers, the rollers extending in an upward direction adapted to protrude through said apertures to support the heavy slab and to rotate said heavy slab in any direction so as to permit manipulation of said slab above the member. The cutting system also includes a multi-directional carriage for moving a cutting tool in any direction upon the surface of the heavy slab.

Abstract: A hydraulically-driven, self-propelled, in-line sewer tap cutter includes roller bearings mounted to the skids and extending beyond the outer edge of the skids to maintain the frame spaced apart from the sewer pipe and facilitate rolling locomotion of the cutter through the pipe. The roller bearings are positioned so as to align the frame with respect to the bit so that, in use, adequate bit clearance is maintained to cut off taps close to the sidewall of the pipe without jaming the bit at offsets. The specially sized bit includes an integral support shelf formed on the exterior of a generally cylindrical barrel to support cutting teeth mounted extending radially outside the barrel to improve bit life and prevent jamming the bit.

Abstract: Apparatus for manufacturing thin wafers from bars, such as in the manufacture of wafers for use as semiconductor substrates, include an arrangement wherein a holder member is fastened to the bar, the bar is sliced to separate a disc-shaped wafer therefrom and wherein prior to completion of the slicing operation, the end face of the bar is leveled to a precisely planar condition. The slicing operation is terminated after the bar is sliced completely through and the holder member is partially, but not completely, sliced through so that a wafer formed by the slicing operation remains connected to the bar by the holder member. The wafer is disconnected from the bar by abrading a portion of the holder member connecting the wafer to the bar.

Abstract: An apparatus having improved safety and performance characteristics for the removal of a coating from a tubular member, and particularly adapted for the removal of a concrete weight coat from submerged oil pipelines, comprising a generally C-shaped rigid frame member which is maintained in proper alignment by contact with the upper coated surface, is provided with a plurality of opposed, inwardly directed driven crusher blades located proximate the ends of the frame member and controlled driving means which are adapted to move the crusher blades. The method comprises positioning the apparatus on the coated pipeline, crushing the coating, raising the entire apparatus to free the fractured coating from the pipeline, retracting the crusher blades, and moving the apparatus to a new position on the pipeline.

Abstract: A self-propelled concrete cutting saw in which the saw and self-propelled platform associated with the saw are both driven by hydraulic motors, with separate motors for each of the two propelling wheels so that the device may be steered by varying the speed of either of the wheels, with the speed of longitudinal movement of the saw through the concrete being controlled by the density of the concrete being cut by the saw so that the saw blade is operated at an optimum rotational speed.

Abstract: A portable rotary power saw comprising a housing having mounted at its aft end a pair of rear wheels and a handlebar assembly. Mounted at the fore end of the housing a rotary cutting blade and a vertically adjustable axle having a pair of front wheels. Located between the rear and front wheels within the housing is a stationary axle mounted upon a pair of bearings which permit the axle to pivot. The saw includes a height adjustment mechanism comprising a segment, a latch, and a cable and lever assembly for operating the latch. One leg of the segment is supported by the stationary axle and connected to the adjustable axle by a pair of arms. The other leg of the segment includes a plurality of notches spaced along its length and it extends through the top of the housing. The latch is located on top of the housing immediately adjacent the notched leg and is capable of pivoting in and out of engagement with the notches.

Abstract: A device for mounting a rail (1) on a surface which particularly is non-horizontal, comprises at least one mounting element (11) adapted to be secured on said surface, at least one connecting element, which is displaceably received in a guide extending along the rail and an engaging arrangement having means for mutual clamping connection of the connecting element and the mounting element in order to connect the rail with the mounting element. The engaging arrangement comprises means (23, 24) for provisionally coupling the connecting element and the mounting element by means of a hooking movement of the connecting element having a movement component substantially parallel to said surface.

Abstract: There is disclosed a powered truck-like vehicle having a support base at the back and an apparatus for cutting street or road pavement. A length-wise-extensible boom is mounted at one end on the base so that it can extend laterally of the vehicle. An elongated rail structure is mounted on the other end of the boom in a manner such that it can be moved alongside the boom. A saw carrier, mounted on the rail structure so that it can be displaced along it, is provided with a rotary pavement cutting saw that can be displaced relative to the rail structure to cut pavement. The vehicle may further comprise a second lengthwise-extensible boom fixed to the base so as to project laterally from it at right angle to the longitudinal axis of the vehicle.

Abstract: A cutting tool such as a tile saw is pivotally connected to a linear guide rod with a four-bar linkage. The linkage allows the cutting tool to be raised and lowered over a work table to facilitate plunge cutting. One link of the four-bar linkage is mounted over the linear guide rod in a fixed perpendicular relationship with the surface of the work table to ensure that the blade of the cutting tool is maintained in a similar perpendicular orientation throughout plunge cutting. This is achieved by adjusting the links of the four-bar linkage as a parallelogram linkage. A linear bearing is fitted between the fixed perpendicular link and the guide rod to allow the cutting tool and linkage to freely slide along an accurate linear cutting path.

Abstract: A device for cutting slots of varying lengths and shapes in pavement to receive a reflector, the cutting blades for cutting the slot always being at right angles to the tangent to that portion of the surface of the pavement where the slot is being cut and means permitting the cutting blades to be maintained at an optimal rotational speed regardless of the density of the type of pavement encountered.

Abstract: Apparatus for reworking pavement expansion joints by resizing the joint includes a frame having front and rear portions hinged to one another at a transverse pivot axis. The frame pushed along the pavement by a vehicle. The rear frame portion is supported by laterally positioned wheels and by a rear guide disk. The front frame portion is supported by a front guide disk. The guide disks lie along the frame axis and engage the expansion joint to guide the frame along the joint. A concrete cutting saw is mounted to the rear frame portion directly above the axis of the support wheels with its saw blade lying in the same vertical plane as the guide disks. The saw is preferably remotely raised and lowerd through actuation of a hydraulic cylinder mounted to the frame to adjust the depth of cut. The frame is pushed through a link drive having dual axis joints for attachment to the vehicle and the frame.

Abstract: The drive motor (1) drives a machining tool (2) which can be fed forwardly by means of a feed motor (3). Both motors (1, 3) are supplied with pressure fluid by the same hydraulic pump (4). A quantitative divider valve (5) divides the oil flow coming from the hydraulic pump, a control valve (24) controlling the flow of pressure fluid in the forward feed motor in such a way that the power output at the forward feed motor falls with increasing resistance at the machining tool, thereby providing for output-regulated operation of the machining tool. In the same way as the forward feed movement, the feed movement in respect of depth of the machining tool can also be produced by way of a depth feed motor (7).

Abstract: A self-propelled concrete cutting saw in which the saw and the self-propelled platform associated with the saw are both driven by hydraulic motors, with the speed of longitudinal movement of the saw through the concrete being controlled by the density of the concrete being cut by the saw so that the saw blade is operated at an optimum rotational speed.

Abstract: A collar assembly is described, for use on a concrete cutter, which enables the major portion of the machine to be easily detached from a stuck sawblade and moved forwardly or rearwardly away from the blade so the blade can be cut out. The outer end of the shaft has a recess of the same diameter as the hole in the blade, and has a smaller threaded hole therein. The outer blade plate which lies on a face of the blade opposite the shaft, has a projecting collar that passes through the hole in the blade and into the recess in the face of the shaft, and a screw passing through the parts fastens them together.

Abstract: The slicing machine has a mounting table carrying the workpiece to be sliced by the cutting blade. The mounting table is supported on an elastically deformable measuring plate of which the deformation is measured by a measuring transducer in a position as near as possible to the plane of the cutting blade wherein the cutting force is acting. The measuring transducer has very high sensitivity in order to detect deformations in the order of fractions of a .mu.m and is thus able to properly detect the value of the cutting force. The measuring system is spaced from the cutting blade and workpiece and does not hinder manipulation and accurate fine adjustment of the workpiece. On the other hand the accuracy of the measurement does not depend on the manner in which the workpiece is mounted. Preferably deflection of the cutting blade from its plane under the influence of the cutting force is also detected and an optimum control and supervision of the cutting process may be effected based on both measurements.

Abstract: A concrete cutting or milling apparatus has a milling head carrying a power driven circular saw blade or milling cutter movable along a guide rail having a plurality of guide rail sections that may be coupled to each other in the longitudinal direction. The guide rail sections are supported by a foot structure that can be screwed to a concrete member, such as a wall or floor, to be cut. The foot structure is releasably secured to the guide rails however in a torsion stiff manner. Further, the foot structure is provided with adjustment screws for the proper axial alignment of the guide rail sections relative to each other to provide for a correction of the rail position and for compensating an uneveness in the surface of the concrete member to be cut. The structure is lightweight and one operator can secure the rail sections to a concrete surface. The rail sections form a closed cross-sectional tubular shape which may be round or substantially box shaped.

Abstract: A portable apparatus for shaping glass by abrasion utilizes a pneumatic motor carried by a carriage which travels along a track. A glass cutting abrasive blade is driven by a pneumatic motor and a fluid coolant spray, which coolant may be water, is directed to the abrading surface of the blade where it contacts the glass being shaped. Various shaping blades may be utilized for cutting, bevel edging, pencil edging and the like.

Abstract: Tile cutting apparatus having a work table to support a tile and support means for a cut-off saw, wherein the support means comprises a cantilever arm extending upwardly from one side of the table and then across part of the table, the arm being mounted on a carriage running in a downwardly facing track beneath the table.

Abstract: A method and apparatus are disclosed for grinding out a crack in pavement in preparation for filling the crack. A narrow groove is formed in the pavement following the crack by a single grooving blade having a first thickness. The single grooving blade is replaced with a second grooving blade assembly having a thickness greater than the single grooving blade, and the second grooving blade assembly is moved along the groove and with the second grooving blade assembly engaging opposite edges of the groove and for forming upwardly outwardly sloping sidewalls.

Abstract: An electromagnetic system is provided for accurately sensing and remotely controlling a tool-to-workpiece spatial relationship. A typical application of the system may include a saw being sensor controlled through the process of removing a reinforced concrete covering from and about an underwater pipe or other metallic object that must be protected.

Abstract: A self propelled sawing machine that includes a frame having ground engaging front and rear wheels, an engine driven infinitely variable hydrostatic or mechanical transmission on the frame that is drivingly connected to the rear wheels, a circular saw blade mounted on the frame and drivenly connected to the engine for making cuts in paving or floor materials such as concrete, masonry, etc., a main housing on the frame, a handle connected to one of the main housing and the frame for controlling the direction of movement of the machine, and control mechanism connected to the transmission for controlling the speed and direction of propulsion of the machine.

Abstract: Column cutting method and apparatus wherein an abrasive saw is mounted pivotally on a track encircling a concrete column. Pivotal movement of the abrasive saw sequentially cuts a circumferential kerf around the periphery of the column including reinforcing members by pivoting the saw substantially radially into the column. An uncut center is left for support, which center is easily fractured for removal of superfluous column segment.

Abstract: A pile-cutting machine for cutting multi-sided piles, such as square piles, having a frame which can be clamped to the pile at a desired location, a carriage mounted on the frame for movement in a continuous path around the pile and a cutting head carried by the carriage with a power-driven cutter positioned relative to the carriage to be at full cutting depth in a pile as the carriage moves along a straight side of the pile and, thereafter, to automatically withdraw from the pile as the carriage swings in travelling around a corner of the pile and subsequently move to full cutting depth in the pile as the carriage advances along the next straight side of the pile.

Abstract: A self-propelled hydraulic power supply vehicle and tool mounting platform having an hydraulic fluid reservoir integral with and forming the structural frame of the vehicle, hydraulically actuated driving and steering apparatus for moving the vehicle across a support surface while performing a cutting operation on the support surface, and castor wheels facilitating vehicle mobility which are rotated into operative position raising the vehicle so that the wheels normally supporting the vehicle are raised out of contact with the surface for mobility when the device is not cutting the support surface.

Abstract: An apparatus for cutting material or grooving concrete has a housing including a curved top for partially accommodating one or more circular saw blades. The housing has a bottom having an opening permitting partial protrusion of the saw blade into cutting engagement with the material or concrete to be cut or grooved. For manual propulsion of the housing along such material or concrete, a curved handle is located on the housing top and has identically dimensioned first and second handle portions extending in parallel to the partially accommodated and protruding saw blade or blades in opposite directions from a central location on the housing top situated opposite the mentioned bottom. The partially accommodated and protruding saw blade is rotated and the housing including the mentioned bottom is maintained in spaced relationship to the material to be cut or concrete to be grooved during operation of the saw blade or blades.

Abstract: A portable concrete pile cutting device is disclosed which comprises a support collar adapted to be removably mounted in supported annular location about a concrete pile, at least one pile cutting assembly mounted for reciprocation on the collar, and means located on the collar for the support of the pile cutting assembly. The pile cutting assembly is adapted to travel in a straight line to form a cut in the concrete pile which runs generally transverse to the longitudinal axis of the pile. A method is also disclosed which comprises mounting a collar in rigid association with the concrete pile, mounting the cutting assembly on the collar so that the cutting means is adjacent the concrete pile, and thereafter moving the cutting assembly with the cutting means in operation across the pile to form a cut, which is of a depth less than that of the thickness of the concrete pile.

Abstract: A system for controlling the blade-to-boule feedrate of a wafer cutting saw to regulate the blade-to-boule force in accordance with predetermined criteria and for monitoring the cutting efficiency of the blade and determining when the blade needs to be dressed to increase its cutting efficiency. A constant blade-to-boule force is preferred.

Abstract: A rail for a machine carriage has an elongate base plate and a pair of spaced supporting walls extending along and rising obliquely from the base plate and converging toward each other in a direction away from the base plate. A first lateral carriage track is located on top of and extends along one of the supporting walls, while a second lateral carriage track is located on top of and extends along the other of the supporting walls and in parallel to the first track. An elongate top plate extends between the first and second lateral carriage tracks and is spaced from the base plate. The base plate, pair of supporting walls, first and second tracks and top plate are integral with each other and encompass an elongate hollow space extending through the rail. Apparatus for supporting and guiding a cutting machine, a machine carriage, and a method of making a machine carriage are also disclosed.