Abstract: A portable machine for steam cleaning carpets, rugs, automotive engines and soiled areas including an electrolytic generator for substantially instant production of steam, a positive displacement pump for delivering a water-chemical solution from a tank to the electrolytic generator and from the electrolytic generator a discharge of steam via a flexible hose and nozzle onto a soiled area including automotive engines. When adapted primarily for rug and carpet cleaning the machine includes an air pump and solenoid for delivering detergent from a tank to the nozzle and a vacuum motor with nozzle for picking up excess moisture and dirt particles released by the steam solution.

Abstract: A caster assembly is disclosed which includes a bearing block with sockets for interchangeably receiving means of attachment to a frame or other structure. A track member is mounted in the bearing block for rotation about an inclined axis extending downwardly at an angle from the vertical direction. Means forming a variable pitch bearing interposed between the track member and bearing block are described, and its optimum configuration for converting multi-directional forces into radially directed forces distributed more or less evenly around the axis.

Abstract: The specification discloses a glide within a glide, and most preferably three glides in one which enables the manufacturer to supply two or three different types of glides with one basic glide unit having common parts. The first glide member is made of hard plastic and has a rounded, bottom shoulder surrounding a downwardly opening cavity therein. A second glide member comprises a soft, plastic member seated within said cavity and projecting a short distance below said rounded shoulder, at least when the glide is unweighted. A third glide member comprises a metal cap which seats over the second glide member and against first glide member to provide a metal bottom surface type of glide.

Abstract: A bed roller having three wheels disposed respectively between the depending flanges of an inverted U-shaped horn frame and upon respectively outer sides of the horn frame flanges all having conforming tread portions and the outer side wheels having smooth outer sides with the horn frame swivel mounted by means of an upwardly disposed stem. The wheels are freely mounted on an axle extending through the flanges of the horn frame so that they may rotate forwardly or rearwardly as the horn frame swivels about the vertical stem.

Abstract: A single station anatomical section de-boning machine, operable by one individual, which machine is comprised of a compound multiple-acting piston driven longitudinal cam activated to cycle and operate adjustably pre-set micro-switches upon manual oriented operator insertion of an elongated anatomical section into the operational head de-boning assembly depressably against a machine plunger trigger thereof, wherein the anatomical section for deboning processing is characterized by having a centrally-extending meat-encased bone member with joint protuberances at either longitudinal end thereof, to thereupon mechanically accomplish by high-speed sequential cycling of the compound multiple-acting piston driven longitudinal cam cooperatively with the pre-set micro-switches in the functioning of a cooperative toggle-acting gripper blade to closably engage and hold the anatomical section for pivotal closing immediately thereafter of shaped cooperative meat cutting and stripping blades to initiate and accomplish pri

Abstract: Process of producing and a resulting simulated "Berber" yarn produced from long staple spun or continuous filament yarn, preferably having continuous filaments or fibers at least six inches in length, and more preferably continuous filament nylon, to provide strength and other desired characteristics of such yarn while simulating the natural aesthetic appearance of "Berber" wool yarn. The yarn, preferably after having been initially completely dyed with a base color, is surface dyed at selected areas of varying sizes and random locations along the length of the yarn with heather colors or shades which do not penetrate all the way through the yarn for simulating varying staple lengths of natural wool fibers, and is thereafter dyed on small selected areas of the yarn at random locations along the length with one or more "Berber" accent colors which penetrate all the way through the yarn for simulating small clumps of very short natural wool fibers.

Abstract: Disclosed herein is a handle for a tool having a shank, which handle comprises identical first and second half sections in mating engagement, which first and second half sections each include cooperating wall means defining a socket for receiving the shank and, when the shank is received in the socket, for preventing relative movement between the half sections in each of three planes mutually perpendicular to each other.

Abstract: According to the present invention, a brushing mechanism for brushing an end face of a metal material to be brushed and an angle detector for detecting an inclination of the end face of a metal material to be brushed are rested on a frame mechanism, said frame mechanism is provided in such a manner as to be swingable or fixable with respect to a base, a side surface of said angle detector in parallel to a brushing surface of said brushing mechanism is moved into a space formed between the end face to be brushed and the brushing surface of said brushing mechanism and brought into abutting contact with the face to be brushed, and the frame mechanism is swinged and inclined commensurate to the inclination of the end face to be brushed by the abutment of said angle detector against the face to be brushed, whereby the brushing surface of said brushing mechanism is brought into parallel to the end face to be brushed, so that the brushing of the end face to be brushed by said brushing mechanism can be effected in pa

Abstract: An inflated shell structure for a curing, embossing, or film winding nip roller having a rubber cover. Fundamentally, the invention includes a mandrel about which a rubber tube is spirally wound. Adhesively secured to the tube and about the mandrel is a bridge composite of plural layers, at least one of which is axially aligned with respect to the mandrel, and at least one of which is circumferentially aligned. Over the bridge network there is maintained a thin rubber cover having a thickness on the order of 0.250-1.0 inch. The tubing can be inflated under a source of gas pressure to give the roll a physical structure of rigidity and consistency. When used as a nip or bonder roller, the forces imparted to the roller are dissipated through the bridge assembly and the inflated tube, greatly limiting the amount of heat generated in the rubber cover.

Abstract: A controlled deflection roll of the type having a rotative shell through which a non-rotative shaft extends axially so as to form a radial space between the shaft and the shell's inside and self-aligning end bearings journaling the shell to the shaft, and the shell's deflection controlled by internal pressure between the bearings in that space, has an arrangement for applying radial forces between the shell and the shaft on the axial outsides of the bearings so that the shell's deflection throughout its length can be more precisely controlled.

Abstract: A method for mounting a ring-shaped construction on a ship stern in front of a propeller which comprises fixing a plurality of pieces at a predetermined distance along a periphery of a ring-shaped construction, marking the points respectively on a plurality of said pieces which are located in a same distance from the center of said ring-shaped construction, and mounting said ring-shaped construction to said ship stern. In this process, centering so that the circular locus of the beam emitted from a projector being rotated around the rotating axis of a propeller passes over said marked points of a plurality of pieces fixed to said ring-shaped construction, the settling position of said ring-shaped construction is adjusted.

Abstract: A slide fastener installation is disclosed in which the trains of coupling elements are adhesively mounted on the article into which the slide fastener is to be installed without the use of mounting tapes. In making this installation, the interlocked trains of elements are mounted on the fabric before a slit is made in the fabric to provide an opening to be closed by the slide fastener.

Abstract: A method and apparatus for containing an annular body of fluid about a sleeve spanning the abutting ends of pipe lengths, and firing a charge of propellant, such as fast burning smokeless powder, in the liquid so as to radially shrink the sleeve into sealing engagement with the pipe lengths. If desired, the pipe lengths can be internally supported to avoid the possibility of collapse. Hard annular elements may be interposed between the sleeve and the pipe length ends to produce better mechanical locking.

Abstract: Stacked leaded hybrid substrates and associated carrier plates are exited from a reflow solder operation onto a vibrating table. Vibration of the table sequentially advances each stacked carrier and substrate until components on the latter contact an arm that is spaced above the table. Detection of the presence of a substrate and carrier adjacent the arm causes a plunger to move transversely across the table and into contact with an edge of the substrate. Further movement of the plunger pushes an edge of the carrier into contact with spring loaded pins in the table top. The shear force created on contiguous surfaces of the substrate and carrier by the plunger and pins causes the substrate to slide off the carrier and over the pins. If this shear force exceeds a prescribed value, the pins rotate into the table top for passing a carrier and/or substrate without damaging the latter.

Abstract: A method of applying a crack arrestor to a pipe section by heating and allowing the arrestor to cool and compress a layer of corrosion resistant material in the position it will occupy along the pipe length.

Abstract: A pedestal liner for a pedestal truck of a railway vehicle and method of making same are provided wherein such pedestal liner is of roughly U-shaped configuration having a bight and a pair of parallel legs and comprising a continuous uninterrupted backing material defining the bight and parallel legs, antifriction material for the bight adapted to engage a vertically disposed planar guide surface of an associated journal box, antifriction material for the parallel legs adapted to engage vertically disposed parallel side surfaces of the journal box and disposed on opposite sides of the guide surface, and means fixing the antifriction material against the backing material with the backing material providing optimum structural support for the antifriction material.

Abstract: A method of manufacturing a field effect transistor uses a semiinsulating substrate consisting of a compound semiconductor, and an N type semiconductor layer formed on the substrate. The method comprises the steps of implanting ions of a P type impurity from the main surface of said semiconductor layer to form at least two P type gate regions which extend from the main surface to substantially reach said substrate and are disposed with a predetermined interval, and sintering metallic layers on the gate regions in ohmic contact and on opposite sides of the semiconductor layers with said semiconductor gate regions being interposed therebetween to form a gate, a source and a drain electrodes. Said implantation step further comprises a step of positioning at least two of said gate regions such that said gate regions come in contact with the boundary region of the transistor to be constructed.

Abstract: A method of manufacturing semiconductor devices is disclosed which comprises the steps of: forming at least one groove at a given location of a semiconductor substrate; laying an insulating film over the entire surface of the semiconductor substrate including the groove; depositing conductive material on the insulating layer to a thickness greater than half the width of an opening of the groove; and forming a MOS capacitor electrode of the conductor layer left in the groove by etching the deposited conductor layer until the insulating film other than its portion within the groove is exposed.

Abstract: Defects in the metal step coverage of a thin film semiconductor device are removed by annealing the metal layer with a pulsed electron beam.

Abstract: A process and device for forming the winding core of a stator or rotor. The winding core is only partially exposed to shaping pressure. Shaping is then continued progressively over the core periphery. A device for effecting the method includes a single or multipartite pressing tool for the winding core. The tool is rotatable relative to the long axis of a stator or rotor. In a preferred embodiment, the tool has a narrow shaping part positioned adjacent to a wrapping tool used to provide a wrapping about the shaped coil.

Abstract: A method for assembling a stator for an electric machine having a permanent magnet for generating a magnetic field in an air gap. Assembly of the stator is performed with the aid of a plunger, the cross section of which corresponds to the cross section of the air gap. The permanent magnet is slid into the interior of the plunger, whereas the flux return ring is slid over the same. The so formed sub-assembly is put into a casting mold adapted to be filled with a plastic material, which in its cured or hardened state forms a casing intimately surrounding the outer surface of the flux return ring and forming a face plate, to which the permanent magnet adheres. When the plastic material has set, the casting mold is opened and the plunger is retracted from the sub-assembly, resulting in a close toleranced cylindrical air gap space. After insertion of a bell-shaped rotor, a brush cover is assembled opposite the face plate.

Abstract: The method of manufacturing, composition and product described herein utilize highly electrically resistive carbon black alone or with low resistivity carbon black to form a self-limiting electrically resistive semi-conductor which presents a positive temperature co-efficient of resistance, the methods which are described providing significantly shortened anneal times, manufacturing ease and reliability.

Abstract: A method of assembling an electrical device including current relay means having housing means with at least one female terminal disposed therein and at least one switch means terminal extending exteriorly of the housing means. In this method, a solid state device is disposed at least adjacent the housing means, and the solid state device is connected in circuit relation between the at least one female terminal and the at least one switch means terminal.

Abstract: An electronic parts mounting apparatus using a band carrier for feeding electronic parts incrementally, the carrier being a strip having many recesses disposed at equal intervals each holding an electronic part and a tape covering the recesses. The apparatus has a support for horizontally supporting the carrier with the coating tape on the top side, a separator for separating the tape from the carrier; and a pick up device for picking up the electronic parts one-by-one from the recesses in the carrier and carrying the electronic parts and placing them in position on a circuit board for continuously and stably mounting the electronic parts on the circuit board.

Abstract: An apparatus for individually selecting a number of single in-line package (SIP) components and sequentially inserting them into a printed circuit board. The apparatus has a basic mode of operation, under a program control, comprising a shuttle assembly and a component pickup and insertion assembly, the shuttle assembly transferring a component from a selected one of a plurality of magazines and transferring the component to an unload station. At the unload station, the pickup and insertion assembly picks up the component from the shuttle assembly and rotates to a vertical position for insertion of the component in a printed circuit board. The printed circuit board is mounted on a pantograph mechanism whose position is controlled by a tape reader or a computer which also determines the automatic sequencing of the shuttle block.

Abstract: An apparatus for inserting electronic components into a printed circuit board including (a) chucking means for holding a pair of lead wires of an electronic component, which chuck opens and closes in a direction perpendicular to a plane including the axes of the pair of lead wires; with a distance identical to that between the lead wire inserting holes in the printed circuit board; (b) means for inserting thus held lead wires into a corresponding pair of lead wire inserting holes; and (c) means for applying a clinching treatment to the inserted lead wires protruding from the back side of the printed circuited board, whereby an electronic component is, regardless of the size of the inter-lead-wire distance, held by a chuck such that one of the lead wires is located at a certain preset base position biased to either side of the chucking surface of the chuck, and the printed circuit board and the chuck are relatively positioned when the lead wires held by the chuck are about to be inserted, and such that the com

Abstract: A tool is disclosed which has a variable tool stroke useful for inserting a wire conductor into and along a conductor terminating slot of an electrical terminal of the type disclosed in U.S. Pat. No. 4,141,618.

Abstract: An electrically insulating base has five bulb holders and six electrical supply contacts secured thereto. The required electrical connections between the bulb holders and the contacts are made by securing a single piece of bared wire to all of the bulb holders and the contacts in the desired pattern and sequence, and then cutting the wire between those bulb holders and contacts where no connection is required in the desired electrical circuit(s). To hold the wire in the desired pattern, it is passed around guides on the base and engaged at wiring cross-over points with combined wire guides and supports. Over long runs the wire is supported by intermediate supports. This form of assembly lends itself to automatic wiring procedures and involves little wastage of material.

Abstract: A cutting tool includes a pair of pivotally connected handles extending through and defining a pair of coacting U-shaped cutting jaws. Each of the cutting jaws defines a cutting edge extending throughout the base and side legs of the U shape. The jaws have a closed position wherein one of the jaws is an inner jaw disposed within the other of the jaws, which is an outer jaw. The cutting edges are angulated in relation to each other so that each of the cutting edges defined by the legs of the respective jaws are not in coacting relationship before the bases of the corresponding jaws. Additionally, the cutting tool includes a knock-out member pivotally disposed within one of the U-shaped jaws for removing material severed by the jaws from the inside thereof.

Abstract: A hand tool for cutting or scoring glass in which an elongated rigid finger piece is provided with an elongated handle secured at one end and a glass scoring member at its opposite end. The finger piece is of somewhat triangular cross section with a flattened top portion and inwardly curved side portions. A cross bar on the finger piece between the handle end of the finger piece and the handle extends outwardly on each side of the finger piece. In use the handle is slipped between the index and middle fingers of the user until the cross bar bears against the palm and the index and middle fingers bear against the top of the finger piece. The finger piece is then grasped between the user's thumb and ring fingers within the inwardly curved side portions.

Abstract: A dough cutter comprising a handle for grasping by a user. The handle has apparatus for limiting lateral movement of a cutter. The cutter is comprised of two or more cutting elements which are in side by side relationship and have mating edges. The cutting elements have depending cutting ribs and apparatus for retaining the two or more cutting elements in positional relationship with one another when releasably retained on the base. Retaining apparatus is provided for releasably retaining the cutting element on the base.

Abstract: A pocket can opener comprises a body with a propelling wheel and a handle for rotating the propelling wheel and a cutter blade pivotally attached to the body so that both the handle and the cutter blade can fold down across the body with the cutter blade overlying and being of such a size as to cover the propelling wheel when the can opener is in inoperative condition. The cutter blade also provides a bottle opener at its free end having a longer arm and a shorter arm, the longer arm being shaped also as an opener for pressed-on jar lids, this latter opener structure being so arranged as to take up no additional space in the folded condition of the parts.

Abstract: An improved compass leg provided with a lower leg portion having an elongated cavity in which a pin or lead insert holder is received and secured by means of a threaded shaft attached to the holder and passing through an aperture in the lower leg portion and engaging a nut; the holder is provided with an axial hole to receive a substantial portion of the pin or lead insert and a groove which communicates with the axial hole such that tightening of the nut causes compression of the sides of the holder and maintains the pin or lead insert securely within the holder.

Abstract: Iron is close to a major surface layer of a yttrium aluminate laser rod so that the layer portion may have a filtering effect. The absorption factor for the short wavelength light of this layer portion depends upon the concentration c (weight percent) of the contained iron and the thickness t (.mu.m) of the iron-containing layer. Consequently, the effect of the iron in the laser rod can be evaluated as a function of the product c.times.t (wt%..mu.m) of the concentration c and the thickness t. In the range of the product c.times.t of 1<c.t<2.times.10.sup.2, a laser output could be obtained which is higher than that of the conventional laser rod not containing iron jointly with a short wavelength light filter. The thickness of the iron-containing layer is 1/4 or less of the radius of the laser rod.

Abstract: A method for accurately determining the distance between the parallel axes f machined holes which avoids the precise coaxial alignment of measuring heads within the hole since there is no requirement that the measuring apparatus be precisely centered in the hole. The instrument required by the method employs a substantially cylindrical measuring head with a rotatable and expandable contactor perpendicularly extending from the base of each measuring head.

Abstract: A linear gauge comprising: a frame; a spindle axially slidably supported by a frame and provided at the forward end thereof with a measuring element; a movable block fixed on the inner end portion of the spindle; a glass scale fixed in the frame in parallel to the spindle; a luminous element, an index scale and a receptor element, all of which are supported by the movable block, with the glass scale interposed between the luminous element and the index scale; a takeup pulley provided at the upper portion in the frame and a guide pulley provided at the lower portion in the frame; a cord connected at one end thereof to the takeup pulley, at the other end to the movable block and wound around the guide pulley; and a spring engaged between the upper pulley and the frame for biasing the upper pulley in the rotating direction corresponding to the outwardly extending direction of the spindle.

Abstract: A staging fixture for holding a single vane nozzle assembly in a predetermined position enables characterization of the effective throat area of the nozzle assembly. The fixture has a holding element for supporting the assembly in a central position, mechanical structure for locating the assembly in the holding element, a first reference surface structure having a first reference surface in opposed juxtaposition to the central position, and a second reference surface structure having a second reference surface in opposed juxtaposition to the central position and on a side opposite to that of the first reference surface. Open area measurements made with a standard reference vane element provide alignment or calibration measurements whereby leading and trailing "half areas" of a single vane airfoil assembly can be determined.

Abstract: A link-type insertion compliance device is provided to accommodate misalignment between mating parts to be assembled in which a series of aligning links attached to pivot means are concentrically disposed within an envelope mounted to a machine operable to vertically translate one mating part into engagement with another in an assembly operation. Adjustment means is provided in at least one of the pivot means to permit adjustment of the center of compliance of the device to a point at or near the insertion end of a part to be assembled. Parts of varying lengths may thus be accommodated by the subject insertion compliance device with minimal wedging and jamming during the insertion operation.

Abstract: A graphic vector plotting instrument, particularly suited for marine navigational computations. A cursor disk is surrounded by a concentric compass disk, and both are rotatable about their common center. The cursor disk has a pair of perpendicular cursor lines which intersect at the common center and a plurality of other parallel cursor lines. The compass disk has a 360.degree. compass rose scale thereon. A transparent plotting slide is slidable over the cursor disk and the compass disk and contains scaled markings permitting the plotting and solution of navigational vector problems thereon without the aid of other devices or surfaces or charts.

Abstract: In a magnetic compass compensation system suitable for use within a ferrous land vehicle, a secondary magnetic sensor senses, the total magnetic field as components along a three axis system drawn vertical, lateral and transverse to the ferrous vehicle. Compensation signals corresponding to the permanent and induced magnetic fields of the vehicle are isolated from the total magnetic field. The compensation signals are applied to compensation coils surrounding a primary magnetic sensor for providing an output equivalent to the horizontal components of the earth's undisturbed magnetic field.

Abstract: The present drafting apparatus comprises a drafting board (1) having secured to one longitudinal edge thereof a metal rail (4). A runner (3) and a rail (2) are displaceable along the metal rail (4). The runner (3) is pulled against the metal rail (4) by magnets. A carriage (6) supporting a ruler (5) having about a square shape, is displaced along the rail (2) and held in place by magnets (43) cooperating with the rail (2) at least the edges of which are made of ferromagnetic material. In order to adjust the rail (2) through relatively small horizontal or vertical angles, the rail (2) is tiltably secured to the runner (3) for adjustment through angles of about 10.degree. to 20.degree., preferably 15.degree. in either direction from the perpendicular position relative to the runner. The tilting movement is transmitted to the rail with the aid of a rod (19) spaced from the journal stud (12) and with the aid of a slide (21) which may be arrested relative to the rail (2).

Abstract: A computational aid device for Ekelund range determinations comprising a e member adapted to be placed over a bearing/time plot and including two leg members to be aligned with intersecting bearing rate lines faired through the plot, and a range scale positionable with respect to the base and the leg members to provide direct readings of range and of probable limits of range error.

Abstract: Mounting structure is provided for support from one side of an elongated body of a carpenter's level having a window extending transversely therethrough and opening through the aforementioned one side of the body. The mounting structure pivotally supports one end of an elongated arm from a first end of the body for swinging between a first position in superposed parallel relation to the aforementioned one side of the body and a second position with the arm projecting at 90.degree. relative to the body. The window in the body has a spirit level mounted therein and the arm includes a portion thereof in registry with the window having an opening formed therethrough. Also, the mounting structure and arm include coacting first latch portions for releasably retaining the arm in the second extended position thereof and second coacting latch portions for releasably retaining the arm in the first position thereof.

Abstract: There is provided a memory circuit whose storage voltage changes with an instantaneous detection voltage indicating the drying rate of part of clothes successively brought in contact with a pair of electrodes. The voltage of the memory circuit is compared with a clothes drying rate setting signal, and thus a drying rate determination signal is obtained. When the determination signal reaches a given integration value, a heat source of a drying apparatus is automatically cut off.

Abstract: A general purpose athletic shoe is described in which an outer sole is provided with integrally molded cleats of two different types. The cleats of the first type are disposed around the periphery of the sole and the cleats of the second type are primarily disposed in the remaining portions of the sole. The second cleats are generally conical in shape and extend outwardly from the sole to about half the height of the first cleats. Each of the first cleats has three surfaces extending outward from a major exterior surface of the outer sole to a flat crown which is parallel to the major exterior surface. Two of the three outwardly extending surfaces of each of the first cleats take the form of essentially flat surfaces oriented generally perpendicular to the major exterior surface and the remaining outwardly extending surface is a partial conical surface which tapers so that first cleats are widest at their junction with the outer sole and narrowest at the crown.

Abstract: A snowshoe is described with a highly mobile circular frame. A woven webbing extends across the frame with a binding attached to an upper surface thereof. The frame includes an inclined annular surface that faces inwardly and downwardly to enable an outer annular edge of the frame to bite into the snow for traction in rough terrain. The snowshoe, due to its circular nature, can be constructed nearly entirely of vehicle tire components.

Abstract: A dredge vehicle having remote steering for moving on the ocean floor on a skid surface, or preferably a pair of runners. The steering is provided by a steering member extending downwardly below the bottom surface of the skid surface into the mud on the ocean floor, which can be moved so as to vary the resultant sideways force exerted against a surface of the member. The movement is provided by pivotally connecting the steering member to the dredge vehicle about a vertical axis. Specifically, the steering member can be rotated by an hydraulic cylinder. Preferably, the downwardly extending steering member is also vertically movably secured to the dredge vehicle so as to be able to be pushed upwardly and out of the way should the steering member strike against a submerged, hard-surfaced object. Preferably, at least a pair of pivotable steering members disposed in tandem are provided.

Abstract: A gear case for a rotary cutter head of a suction cutter dredger, comprising at least two connecting members each suitable for pivotally coupling the gear case to the ladder frame, said connecting members being located at the acute angles of an imaginary right-angled triangle, and the drive shaft extending approximately along, or approximately parallel to, one of the legs of said triangle.

Abstract: A cutter having a plurality of cutting blades for a suction-dredger which in operation is driven into rotation so that said cutting blades are capable to cut loose the soil which, mixed with water is subsequently sucked up by means of suction tube, one or more nozzles being provided on each cutting blade, at the back of its cutting edge so that the fluid jet ejected from the nozzles of a cutting blade pretreats the soil portion to be cut loose by the next cutting blade.

Abstract: A drive train assembly is provided for the digging chain drive sprocket and spoil dispersing auger of a hydrostatically operated trenching machine. The drive assembly is totally enclosed and includes a hydraulic motor, a rotatable drive sprocket-hub subassembly, a planetary gearbox, and a boom lift casting. The planetary gearbox and hydraulic motor are mounted on opposite ends of the boom lift casting, and they are drivingly interconnected by a drive shaft that passes through the casting. The planetary gearbox includes a housing for rotatably mounting the spoil dispersing auger such that the gearbox housing and auger act as a heat sink to dissipate heat generated by the driven gears within the gearbox. The digging chain drive sprocket subassembly is rotatably mounted on the boom lift casting adjacent the planetary gearbox, and it is connected to the gearbox whereby the digging chain drive sprocket and auger are driven in unison by the hydraulic motor.