Abstract: A semiconductor device with deep grid accessible via the surface having a silicon substrate and comprising U-shaped grooves. The upper parts of the side walls of these grooves are insulated by a silica layer and the lower parts of these grooves connect up with overdoped zones. Polycrystalline silicon provides ohmic contact between selected positions on the upper face of the transistor and the grid layer.

Abstract: A process is described for manufacturing integrated insulated-gate field-effect transistors comprising contacts on both the source region and the drain region which are self-aligned with respect to the gate electrode. In this process the gate area and the areas of the aforementioned regions are defined by means of an oxidation masking layer, and on these regions by employing the oxidation masking layer, there are produced insulator layers which are relatively thick compared to the gate insulator layer.

Abstract: A semiconductor device having a multi-level metallization system wherein the first level is of aluminum containing up to 3 of percent silicon and the second level is either aluminum or aluminum containing silicon in an amount less than that contained in the first level. The two levels where they contact each other are sintered together with some of the silicon from the first level being diffused into the second level so that the second level has a region adjacent the junction between the two levels which has a higher content of silicon than the remaining portion of the second level. When making the device, the surface of the first level where it is to be joined with the second level is etched to remove some of the aluminum, but not the silicon, which roughens this surface. The second level is applied on this roughened surface and the device is heated to sinter the two levels together and diffuse the silicon into the second level.

Abstract: A fixture or fixtures and method for assembly and/or fabrication of a component of magnetic information storage apparatus. The component is a flexure arm carrying parts including a gimbal plate; transducer, that is, a magnetic slider head; and a flex cable connecting to the magnetic poles of the magnetic slider head. A fixture is provided having a configuration and holding pins for holding the magnetic slider head; for holding the gimbal plate, and a flexure arm with parts in aligned relationship, the fixture having a removable part which holds the gimbal plate and which is removable from the fixture for subsequent positioning of the flexure arm. Fixture parts are provided for configurating the flex cable. The method comprises a series of steps including positioning parts to be assembled in relationship to the fixture; taking out the removable fixture part; positioning the flexure arm and bonding and attaching the parts together to complete the fully assembled and fabricated component.

Abstract: Power Transformer cores are assembled by inserting a plurality of lamination inserts between the upper yoke laminations and the leg laminations in the transformer core assembly process. The arrangement allows the upper yoke to be readily removed for inserting the transformer windings over the core legs. The upper yoke is then reassembled with the inserts reinserted to complete the transformer core.

Abstract: Apparatus for mounting chip type circuit elements on printed circuit boards in one-by-one fashion with increased speed and precision includes a supply unit adapted to supply chip type circuit elements, a plurality of pallets conveyed in an intermittent fashion, a first shifting member adapted to shift the chip type circuit elements from the supply unit onto the pallet, an X-Y table adapted to support a printed circuit board, a mounting mechanism having mounting heads associated therewith for mounting the chip type circuit elements on the printed circuit board supported by the X-Y table and a second shifting member adapted to shift the chip type circuit elements from the pallet to the mounting heads where they are received and positively gripped for subsequent mounting onto the printed circuit board.

Abstract: Tool for terminating a plurality of wires to a matrix of wire receiving slots in a connector comprises a housing having a cover hinged thereto and nest means therein movable perpendicularly to said housing. The cover has a plurality of wire inserters extending from the bottom surface thereof toward the nest means, each inserter being slidable to a like plurality of positions. The nest means is profiled to hold the connector so that the matrix of slots parallels the array of inserters, whereby a plurality of parallel wires may be terminated to slots as desired by moving said nest with connector and wires therein toward said cover with inserters appropriately positioned.

Abstract: A coupling-element pairing apparatus includes a substantially Y-shaped guide channel defined in a base and including a joint passage for interengaging disengaged rows of continuous filamentary zigzag coupling elements. The joint passage has a width narrow enough to substantially prevent interengaged rows of coupling elements from moving laterally with respect to one another. A pair of toothed guide wheels disposed one on each side of the joint passage for guidingly advancing the interengaged rows of coupling elements through the guide channel. Each guide wheel has a plurality of peripheral teeth, two adjacent ones of which project into the joint passage for holding therebetween one of the connecting portions of each row of coupling elements at opposite ends thereof without impairing the coupling elements.

Abstract: A slider holding apparatus comprises a support vertically slideable on a base for supporting a slider upside down with a pull tab received in a slit of the support, and a lever having a locking projection and pivotable on the base between a slider-holding position in which the locking projection projects into the slit to lock the pull tab and a slider-release position in which the locking projection is retracted out of the slit to unlock the pull tab. The support is normally urged upwardly by a first spring, and the lever is normally urged by a second spring to the slider-release position. The apparatus further includes means for detecting when the support as depressed against the bias of the first spring arrives at a predetermined lower position, and means, responsive to detection of the arrival of the support, for driving the lever to the slider-holding position against the bias of the second spring.

Abstract: An electronic circuit including a substrate with an aperture therethrough is manufactured by cutting one or more slots in an edge of a slab of substrate, metalizing the slotted edge of the substrate and metalizing a mating edge of a mating substrate, securing together the metalized edges of the slotted substrate and mating substrate to create an aperture through the substrate from an upper surface to a lower surface thereof and creating a printed circuit pattern on one of the upper and lower surfaces of the combined substrate and metalizing the other surface of the combined substrate including a connection to the metalized edges.

Abstract: The invention provides a novel and improved method for manufacturing an elongated piece of a composite body composed of a rubber or plastic body of an elongated form and a plurality of electroconductive linear bodies embedded in or bonded on the surface of the elongated rubber or plastic body in alignment, each of the linear bodies extending in the transverse direction of the elongated body in substantial parallelism with each other and being in a curved, bent or corrugated form useful as a connector, electromagnetic shielding gasket and the like. Different from conventional known methods, the invention proposes a method in which the linear bodies are first integrated with the sheet of rubber or plastic followed by corrugating the linear bodies together with the sheet and chopping of the thus corrugated composite body into pieces in a plane perpendicular to the longitudinal direction of the linear bodies.

Abstract: A reciprocating saw attachment for a chain saw whereby the rotating chain saw drive converts the attachment to reciprocating movement to operate a saw blade longitudinally remote from the chain saw tool. It comprises a guide bar having one end formed to replace the prior art guide bar. The guide bar of this invention is formed with a slotted aperture in the body thereof and carries a sprocket wheel at the distal end of the guide bar. An endless link chain encircles the edge of the guide bar, the sprocket drive of the chain saw motor and the sprocket wheel mounted on the guide bar. A slide block is reciprocally movable in the slotted aperture and driven by a crank lever connecting the sprocket wheel and the slide block. A longitudinal pole is mounted on the guide bar for distally supporting an elongated push rod mounted on the guide bar for reciprocal movement. The proximate end of the elongated push rod is linked to the slide block.

Abstract: A tool for removing the outer sheet metal skin of an automobile door. The tool includes a head having a handle and a shank affixed to it, so that the tool can be held and guided by the handle, when operated with a pneumatic hammer or air chisel is coupled to the shank. The tool has a stepped groove formed in the bottom wall of the head, and a removable cutting bit which extends through the head and has its cutting edge co-planar with the bottom of the groove. Forward of the cutting bit the groove is of a deeper depth, and controls the depth of cut made by the tool when the cut edge of the sheet metal skin is seated in the groove behind the cutting bit. A bore also is provided in the head for dispelling the chip or scrape cut from the sheet metal skin.

Abstract: An apparatus for cutting hair at a predetermined measured length is provided using a clip device having a first and second jaw member, whereby each jaw member has a clamping portion and a handle member. Pressure applied to the handle members causes the clamping portion to separate, such that a section of hair may be encompassed thereby. Depending from the first jaw member are base spacer attachments arranged to rest on the scalp while grasping the section of hair between the clamping portions. This allows for manual trimming with scissors along the upper edge of the clamping portion. Said section of hair is therefore cut at a predetermined length measured by the combination of the height of the jaw member and the size of the spacer attachments selected.

Abstract: An impact-resistant knife hilt comprising a hollow handle containing a clevis with shear pin connecting the knife blade to the end cap of the knife handle. Such a knife is readily assembled and disassembled by spinning the end cap while the hilt with shear pin reduces the risk of blade breakage upon impact.

Abstract: An electric powered can opener has a housing, a feed gear that is motor connected and rotatably mounted to drive and rotate a can by holding it by its rim. An operating lever is pivoted above the gear on the housing and carries a cutter mechanism to remove the can lid. To this conventional arrangement an improvement is added in the cutter mechanism of a non-round cutter wheel connected to and movable by the lever and having a lobed or flat portion within the periphery and oriented so that the cutter wheel is substantially stationary as it is pulled into the can lid such that the meeting edge of the periphery at the flat and round periphery provides a power pierce whereupon the cutter wheel then rotates for a clean severing of the can lid. The cutter is preferably a dish-shaped cutter with a hollow ground flat or lobe portion. The lever is preferably spring biased for rotation toward the can at all times and has a slidable switch actuator that is linkage-connected to the lever for manual operation.

Abstract: A brake drum gauge comprises a U-shaped frame with a pair of supports attached to its ends so the gauge may rest on the rim of a brake drum. A micrometer having an outwardly biased actuating pin is attached to one end of the frame, and a reference pin is attached to the other end thereof. The reference pin and micrometer actuating pin engage the inner surface of the brake drum at diametrically opposite points, the micrometer thereby indicating the diameter of the drum relative to its prescribed nominal diameter. The reference pin and support attached to the same end of the frame may be elements of a set of interchangeable pins and corresponding supports, whereby the gauge may be selectively fitted to measure brake drums of different sizes.

Abstract: A component measuring machine includes a base on which a carriage is mounted for movement along an x-axis. A compound slide structure is mounted on the carriage for moving a cradle along y- and z-axes. A support on the carriage and the cradle supports an arm so that it is angularly movable about a point relative to the carriage. Thickness measurements can be made by means of a caliper structure mounted on the end of the arm, which can be turned about its own longitudinal axis for varying the orientation of the caliper structure. The precise positions of the contact tips of the caliper structure are determined by accurately monitoring displacements of the carriage and the compound slide structure, and turning of the arm on its axis.

Abstract: The positioner comprises a fixed frame (1) from which extends a first pair of parallel piezoelectric benders ("bimorphs") (2, 3) which carry an intermediate frame (4). Actuation of the bimorphs (2, 3) causes lateral translation of the intermediate frame (4) with respect to the fixed frame with the bimorphs (2, 3) forming the flexible sides of a parallelogram.Attached to the intermediate frame (4) is a second pair of bimorphs (12, 13) which extend in a direction orthogonal to the direction of the first pair of bimorphs (2, 3) thus permitting a support frame (14) to exercise a deflection in a direction orthogonal with respect to the movement of the intermediate frame (4).The bimorphs used consist of one or two piezoelectric elements carrying two or more electrodes on either side the proper actuation of which causes the benders to bend with parallel end surfaces at all times.

Abstract: A base plate bolt hole marker is shown of the type used to mark bolt holes on a base plate in slab construction where foundation bolts are provided at spaced intervals along the edge of a concrete slab. The marker includes a handle portion and a measuring arm slidably received within the handle portion. The measuring arm has a bolt engaging end for engaging the foundation bolts. A marking member carried on the measuring arm is used to mark the location of a bolt hole on the base plate. A depending flange affixed to the handle portion of the device is used to align the device with the edge of the base plate whereby the measuring arm extends generally perpendicular to the axis of the base plate when the depending flange contacts the base plate. The distance between the bolt engaging end of the tool and the depending flange is adjustable by varying the position of the measuring arm with respect to the handle portion to mark bolt holes in base plates of varying widths.

Abstract: A sundial comprising a transparent hollow globe marked with latitude and longitude lines and including a map of the world is mounted on a stationary base. The globe is adjustable with respect to the base to enable the polar axis to be inclined toward a geographic pole of the earth and to permit alignment of a desired geographic location on the map with an index point. A reflector is mounted at the center of the globe and focuses an image of the sun onto the interior surface of the globe. The image traverses the globe as the earth rotates, thereby tracking the actual path of the sun with respect to the earth on the globe surface.

Abstract: A guide rail for a drawing machine carriage has a single part or multipart rack configuration for guiding a carriage with a longitudinally extending slot through which projects the supporting arm of the carriage. In order to achieve simple and reliable dust protection, the slot is provided with a covering element which extends over the slot without impeding the mounting arm. The covering element may be a dustproof sealing lip or a continuous band which is attached to the carriage.

Abstract: A process for drying a food under a reduced pressure is provided for the preparation of a dried food which may be rehydrated to the original condition in a very short time to have pleasant taste and texture substantially comparable to an untreated food. The process is characterized by the step of placing the food to be dried in an environment of reduced pressure low enough to vaporize a portion of the water contained in the food and to freeze the balance of water by the radiation of heat by the vaporization, and the step of heating to dry the food at relatively low temperature under the reduced pressure. A further characteristic feature of the process of the invention is the sudden or abrupt drop of the pressure surrounding the food at the initial stage, whereby the food is puffed somewhat by the action of the vigorously vaporizing water to a dried state with a substantially hollow core portion and a denser surface layer.

Abstract: An impingement oven wherein a carrier-type conveyor passes between hot air plenums located above and below the conveyor. Horizontally adjacent plenums have their fans located in an off-set position to overhang the other one of the pair. Each plenum has a nozzle plate to direct heated air toward the conveyor so that the air flow is substantially perpendicular to the conveyor and such workpiece(s) as may be thereon. An oven module having four sets of plenums and four conveyors in the same enclosure is described. A plurality of such modules serially arranged provide a multizone oven. The oven is especially suited to heating flat workpieces of thermoplastic resin which are to be processed elsewhere into hollow objects such as containers.

Abstract: A speaker independent conversational voice command control system is provided which is useful in connection with home appliances which operate within a range of selectable parameters, such as an automatic clothes dryer. The control system recognizes voice commands and emits synthesized speech sounds, in an interaction with a user, to obtain the input necessary for setting the operating parameters.

Abstract: There is described an apparatus for drying and cooling dry cleaned items and for recovering cleaning solvents therefrom, including a cleaning drum for receiving and treating the items with cleaning solvent, a circulating fan for drawing air through the drum, a heater for heating the air drawn through the drum during the drying cycle of the dry cleaning machine, a condenser for condensing solvent vapors entrained in the heated air during the drying cycle and a gas compresser to supply the heater and condenser with hot gas during the drying cycle of the apparatus. The compresser also supplies cold refrigerant to the condenser during the drying cycle. The compresser then supplies cold refrigerant both to the heater and the condenser during the cooling cycle of the apparatus.

Abstract: A drying cylinder adapted to receive steam therein includes a cylindrical cylinder jacket and two end covers. There is a flange connection between the jacket and the covers. The jacket has a rectangular cross-section flange. The covers have an L-shaped flange which receives the end flange of the cover. The covers are concave to the outside of the cylinder. The point of intersection of a curved line through the cover and of the axial center line of the axial arm of the cover flange lies at a distance from the outer face of the flange of the end cover that is at most about 60% of the axial length of the axial arm of that flange. There is thermal insulation on the axially exterior side of each cover.

Abstract: A tobacco curing bin for use in a tobacco curing kiln is provided, the said bin comprising a box-like structure with opposing ends, a top, a front, a back, a floor, and having tynes adapted to pierce and support the tobacco leaves therein; each said end being adapted to be impervious to the flow of curing air; the said front being adapted with holes to receive said tynes and having at least one gate to permit loading and unloading of the bin; the said back being adapted to provide a support for the tobacco leaves in the bin when the bin is being loaded or unloaded and further adapted to receive said tynes; the said tynes being adapted to pass through the holes in the front, to pierce the tobacco leaves and to engage with the said back to support the tobacco leaves within the bin; the said floor being adapted to be pervious to the flow of curing air and being characterized in that said floor is adapted to slope upwardly from the ends to a middle portion in said floor to permit an improved flow of curing air th

Abstract: An insert for use in ice skates and the like which includes a blank pad having a top layer with an upper surface provided with a contour substantially complemental to the plantar surface of a person's foot, the top layer formed from suitable material to resist abrasion and absorb perspiration. The top layer is bonded to an intermediate layer formed of resilient material, a bottom of the intermediate surface affixed to a lower surface having a bottom layer provided with an alignment device for registry with the center line of a skate whereby deformation of the blank occurs along its longitudinal axis directly above the skate blade, the deformation of the blank causing a cradling and supporting effect upon the foot disposed within the skate so as to provide not only better centering over the skate blade, but also an improved load transmission from the foot through the leg resulting in overall better balance and skate edge control.

Abstract: A footbed support for footwear comprises a laminate footbed custom formed to the shape of the wearer's foot from laminae of water-activated, polyurethane-impregnated fabric sheet material. The footbed is formed by placing the water-activated lamina on a resilient domed foot pad, then placing the foot in a predetermined position on the pad over the laminae so that the longitudinal arch of the foot overlies a portion of the dome corresponding to the height of the longitudinal arch and shape of the sole of the foot. The foot is then weighted to form an impression in the laminate, and the laminate allowed to partially cure before the foot is removed. Before final placement of the foot on the pad, the laminae are cut to differential lengths and widths if desired to provide a desired differential flexibility, rigidity, and thickness in different areas of the cured laminate footbed.

Abstract: Apparatus for making ski trails which is towed and comprises a drag having a cutter unit and a snow crushing unit mounted behind the cutter unit on the drag. The units have radial blades and rotate about an axis transverse to the direction of travel of the apparatus. The cutter unit derives its rotary motion from the tamped track of the snow and is connected by a transmission to the crushing unit whereby the latter derives its rotary motion from the cutter unit.

Abstract: An item selection signal input system includes a sheet file carrying a plurality of item lists, each of the item lists being provided with item indicia for marking switches formed on a keyboard panel. The sheet file is removably wound around a bidirectionally rotatable drum through the use of a claw provided on the bidirectionally rotatable drum and an engaging member secured to one end of the sheet file. When different key markings are required, the sheet file is demounted from the bidirectionally rotatable drum, and a new sheet file is mounted on the bidirectionally rotatable drum through the use of the claw and the engaging member.

Abstract: A display screen comprising a planar display panel, a pair of end panels and a pair of brace members, each end panel being mounted to the sides of the display panel to extend transversly from each face thereof and engage opposed portions of each face for a portion of the height of the display panel, each brace member being located one to each side of the display panel and having a horizontal portion extending between the end panel in abutting relationship with the face of the display panel.

Abstract: A pistol which is loaded through a magazine receiving opening in the butt of the frame of the pistol handle is provided with an improved loading guide. The guide is equipped with a funnel which aids in guiding a magazine into the magazine receiving opening. The guide embraces the walls of the pistol frame and defines transverse openings on its opposite sides arranged in coaxial alignment with the magazine spring housing pin bores in the pistol frame. A mounting rod is engaged with the guide through the transverse openings therein and passes through the magazine spring housing pin bores to both secure the guide to the pistol frame and to function as a magazine spring housing pin.

Abstract: A signal indicator to indicate a bite of a fish including a housing, a lamp, an audible signal, and a flag, all energized by a pop-up element tripped by the fish bite. The indicator can also be used with a conventional ice fishing tip up fishing device.

Abstract: A fishing rod having a tubular rod section and an integral handle-reel seat. The handle-reel seat includes an insert in the form of a reinforcing rod on which the handle is molded in situ. The reinforcing rod extends out of the handle for frictional engagement and receipt within the hollow interior of the rod section to secure the rod section to the handle. The interior of the rod section receiving the insert is tapered, as is the extending portion of the insert, to ensure that good frictional engagement between the rod section an insert results irrespective of wear on the engaging surfaces.

Abstract: A fishing lure for use with a line having terminal gear has a flexible tubular body; a head member attachable to the tubular body at one end and having at least one axial bore therethrough; an end cap attachable to the tubular body at the other end and having at least one axial bore therethrough. The lure is threadable over the line, which passes through the bore in the head, through the tubular member and through the bore in the end cap. The bore in the end cap is sufficiently small to prevent the terminal gear, including a hook, from passing therethrough, whereby the lure flexes on the line as the lure is pushed through the water by the terminal gear engaging the end cap, as the terminal gear is itself pulled through the water by the line. The lure may further comprise first and second elastic members tightly engaging around the lure and spaced from one another, under which a section of the line may be releasably held.

Abstract: A locking and releasing mechanism for a fishing line release adapted for use with a downrigger cable is disclosed. This device includes a housing adapted to receive a downrigger cable and a locking shaft for selective engagement with the downrigger cable. The device provides selective attachment and release of a plurality of stacked locking and releasing mechanisms and their associated fishing line releases to and from the downrigger cable allowing the downrigger cable to be continuously reeled into a boat.

Abstract: A tree brace unit for maintaining young trees in an upright posture has a circular ground-mounted base and a plurality of legs extending upwardly therefrom to a collar which encircles the tree trunk at an elevated level. The brace portion is formed from a pair of identical members formed from a single piece of metal rod. Each piece is bent to form a pair of parallel legs which are connected by a collar segment. When mounted in opposing position on the base, the two collar segments are clamped together to form a collar which extends completely around the tree trunk.

Abstract: A safety lock assembly for use with a garage door to prevent the latter from falling uncontrollably in the event the counterweight system supporting the garage door fails. The invention has a pivoted arm biased into a position blocking door movement. The counterweight system is attached to the pivoted arm to overcome the bias. In the event of a failure in the weight supporting members, the built-in bias will move the arm into its position where further significant movement of the door is prevented.

Abstract: A gate opener (14) is disclosed for attachment to a pre-existing gate (10) mounted for pivotal motion to a post (12). The gate opener includes a controller (30) for activation by an operator from a remote location, such as a vehicle, to transmit a signal of predetermined frequency to a receiver (32) mounted by the gate. The receiver (32) activates a relay to initiate operation of an electric motor (34) to open or close the gate. The rotating motion of the motor shaft is transferred through a set of pulleys (37, 39), a belt (43), gears (48, 54) and a chain (58) to a wheel (38) in contact with the ground. A gate opener (100) forms a second embodiment of the invention. The gate opener (100) is supported by a parallel arm hinge assembly (104) so that substantially the entire weight of the gate opener (100) is supported on the ground (40) through the ground wheel (132) to provide traction to the ground wheel.

Abstract: An insulated edge guard comprises for the insulating liner superimposed layers of polyvinylchloride and polyvinylfluoride with the former adhered to the body of the edge guard and the latter being on the exterior to present a desired color.

Abstract: A method for making an edge guard wherein insulating inserts are fitted onto the beaded ends of the legs of a metal U-shaped edge guard channel with the inserts interlocking with the crevices provided by the beads in certain embodiments. In one embodiment the metal channel is pre-coated with insulation, by spray or roller coating for example, before the insulating inserts are applied. In another embodiment, a one-piece insert is provided which covers the entire exterior of the U-shaped channel, extends around the beads including interlocking portions interlocking with the beads and continues to extend around the beads on the inside of the legs of the channel so as to leave a gap at the base of the inside surface of the channel. The invention provides color-coordination with simplified inventory and manufacturing requirements.

Abstract: The invention relates to an automatic machine tool for machining workpieces, including a number n of workpiece receivers that can be adjusted in angular and/or spatial position and including an equal number n of work stations, one of said work stations being an exchange station, said receivers or stations being disposed at mutual angular separations of 360.degree./n on a rotatable index table, said stations or said receivers being locally fixed thereon and said index table being advanceable in such a manner that each workpiece traverses all stations in the same sequence. By applying the invention reliable and precise machining, coupled with simple construction should be achieved. This is made possible by the fact that the drive of the index table is controllable so that a sequence of (n-1) rotary steps by 360.degree./n in one direction is followed by a rotary step of 360.degree. (n-1)/n in the opposite direction.

Abstract: A machine is of the type comprising an oscillating movable head with a tool-holding spindle, driven in rotation above a lens-support. The lens-support is borne by a vertically movable spindle which is mounted inside a sleeve, flared out at its upper part to form two bearing surfaces and, the lens-support comprises a ledge which surrounds the part of the sleeve containing the bearing surfaces. The lens-support rests on a head mounted for free rotation in a fixed pivot so that when the spindle is moved upwardly, the lens-support is immobilized in a horizontal position, to deposit the lenses to be polished thereon, or to remove them after the polishing operation. When the spindle is moved downwardly, the lens-support, then at a distance from the bearing surfaces, can oscillate freely during the lens-polishing operation, under the effect of the movable oscillating head.

Abstract: A grinding unit especially adapted for use for grinding with a robot and in automatic machines. The unit is designed with a grinding wheel on an axially displaceable shaft, which is urged in a direction towards a surface to be ground by a spring. The grinding pressure is determined by this spring and the position of the grinding wheel is determined by the level of the grinding surface. The mass of the parts which are displaced under the influence of the grinding pressure can be made small. Only the grinding wheel, the shaft and a member, which is directly connected to said shaft, are displaced. Therefore, the grinding pressure is influenced only to an insignificant extent when changing the orientation of the grinding unit.

Abstract: A bowl-type vibratory finishing machine is disclosed which employs an extremely simple yet highly effective arrangement of components enabling a relatively low-energy-input drive system to efficiently impart an extraordinarily aggressive finishing action to a mixture of workpieces and finishing media contained within an annular, trough-like finishing chamber defined by a movably supported bowl. The finishing chamber extends substantially horizontally about a substantially vertical center axis. An eccentrically weighted drive shaft extends along the center axis and is journaled by bearings which are connected to the bowl so that, when the drive shaft is rotated, vibrations generated by the unbalanced nature of the drive shaft are transmitted to the bowl and cause the bowl to vibrate generally about a nodal point located along the central axis.

Abstract: A drill bit sharpening apparatus designed to sharpen the points of bits having differing diameters and differing point angles. The apparatus accommodates bits having differing point angles by providing a bit cradling member that has a plurality of mounting apertures formed therein wherein the respective positions of such apertures are predetermined to position the bit to be sharpened in proper angular relation to the grinding means, such aperture positions being mathematically determined. Bits of differing diameters are accommodated by a mechanism that positions the bit cradling member and hence the bit to be sharpened in the proper spaced relation to such grinding medium, said positioning also being mathematically determined. A different gauge member is provided for each differing point angle, and a plurality of algorhythm-derived points are marked on each gauge, which points represent the respective settings of the apparatus as between bits of differing diameters.

Abstract: The present invention relates to a stack or a vertical pipe for the flow of gas, said stack or pipe comprising a suspension mast defining a vertical axis; at least one supple surface, open downwardly and upwardly, and symmetrical with respect to this axis; substantially horizontal, rigid hoops, viz. an upper hoop and a lower hoop respectively fast with the upper and lower periphery of the surface, each hoop being symmetrical with respect to said axis; supple bearing ties suspending the upper hoop from the mast; and stays connecting the lower hoop to a fixed lower point of the mast or the ground to stretch the supple surface in a vertical direction. The invention finds application in the entire production or extension of stacks or pipes such as atmospheric cooling towers.

Abstract: A device for fastening a temporary replacement heat shield tile to the strain isolation pad of a space vehicle is disclosed. An internally threaded, flanged cylinder 20 is rotatably connected to a threaded brass plug 18 through a flanged aluminum sleeve 16 to form the device. The device is adhesively attached to the replacement tile 12 before using. In using the device, the tile containing the device is placed against the strain isolation pad 14 of the space vehicle such that the flanged portion of the flanged cylinder rests against the strain isolation pad. This flanged portion, which consists of a plurality of `L` shaped blades 41-44, is then rotated into the strain isolation pad. The brass plug is then rotated with respect to the flanged stainless steel cylinder to draw the tile snuggly against isolation pad and thus complete the fastening process.