Abstract: A hydro-ski craft in which load alleviation is attained by reducing the effective wetted area of the planing surfaces at high speeds, and in which elongated flaps extending longitudinally of the craft are mounted to swing about longitudinal axes between generally horizontal planing positions and upwardly swung retracted positions. Spray control dams may be carried by the flaps to themselves automatically swing between inactive and active positions in response to upward swinging movement of the flaps.

Abstract: A hypertension brace of cruciform shape having four pads, including sternal, pubic and two side pads, in which each of the four arms is longitudinally adjustable so as to facilitate fitting the patient. Further, at least the sternum pad is flexibly mounted to enable easy comformability to the sternum area of the individual patient.

Abstract: A collapsible shelter structure having a pair of collapsible frame members disposed at opposed ends thereof for supporting panel means which extend therebetween, wherein the collapsible frame means include a braced lazy-tong structure which is designed to maintain the frames in erect disposition, and wherein bracing strut means are pivotally coupled to alternate outer apices of the lazy-tong structure for rendering the frame means both stable and rigid. To further enhance rigidity of the erect structure, the inner apices are normally formed as a straight angle when the shelter structure is in erect form, with these inner apices forming a series of spaced points along a semicircle of fixed radius. The collapsible shelter means may be taken down and stored in collapsed form when desired, with generally rigid or durable base side panels being provided to protect the structure from inadvertent damage during use and during storage.

Abstract: A metallurgical vessel includes a cylindrical portion which is supported on a ring carrying a tilting spindle which is mounted for pivotal tilting movement of the vessel. The vessel includes a frustoconical mouth portion at its upper end which terminates in a mouth ring of reinforced construction. The construction includes a cooling arrangement for the mouth portion which comprises a plurality of groups of coils which are wound around the mouth portion and which are advantageously wound in the form of a multistart screw thread. Each group of coils includes an inlet and an outlet which is connected to a distributor through suitable valves. This distributor in turn is connected through a main distribution pipe which extends through an opening in the tilting ring and the tilting spindle and is connected to a source of fluid cooling medium through a rotary seal at the outer end of the tilting spindle.

Abstract: In an automatic control type electronic flash unit having a light-sensing element for sensing reflection of light generated by an interior light discharge tube with the aid of charging current of a capacitor, light emission of the interior light discharge tube is automatically disconnected when the light-sensing element has sensed a predetermined quantity of light. The electronic flash unit includes means for indicating that light has been automatically controlled, first signal generating means for generating a first signal when the light-sensing element has sensed a predetermined quantity of light, and means for receiving the signal as input and for rendering the indicating means operative upon reception of the signal.

Abstract: A composite substrate for use in a rotating x-ray anode tube consists of a graphite member joined to another member to which a target anode is affixed.

Abstract: This invention relates to a helmet for cyclists, skateboard runners and roller skaters. It comprises a shell of flexible and hard plate-shaped material and a damping means attached inside the shell. The shell in its plane has the form of an I, with extended cross-pieces (3) and with tips (3) attached radially between the same, which tips extend from the connecting between the cross-pieces and the stem of the I. About at the center of said stem lateral tips are attached to both sides. The cross-pieces and tips are provided with attachment means in such a manner, that the free ends of one cross-piece after the bending of the stem can be connected to the free ends of the other cross-piece. The free ends of the tips can be attached to suitable holders on the lateral tips.The cross-pieces, tips and lateral tips can be designed as bands, and the attachment means be arranged so that the width and size of the shell can be adjusted.

Abstract: The present invention pertains to the combination of a hat, a hat band and support structure intermediate said hat and hat band.

Abstract: Ski goggles are composed of goggle frame, goggle lens and rubber band. Vent holes are formed, respectively, in the top peripheral wall portion and the bottom peripheral wall portion of the goggle frame. A permeable coating material is engaged to cover the vent holes. A mounting stand, which serves as duct, is engaged in the central portion of the top peripheral wall portion of the goggle frame. A ventilating fan and a small-size motor for driving the fan are mounted on the mounting stand. The ventilating fan is adapted to compulsorily ventilate the air within the inner space formed between the goggle lens and the face, and is accommodated within the mounting stand. The motor can be turned on or off by a power supply switch. The number of the revolutions can be controlled by the controlling circuit or can be controlled by a controlling circuit or in accordance with the humidity of the inner space.

Abstract: A heart valve having a pair of leaflets which are guided between their open and closed positions by guides extending outward and received in dog-leg shaped depressions. The depressions each have a downstream section, which angles outward from a centerline plane of the valve body and a connected vertical upstream section. In the closed position the guides reside in intermediate locations to unload the force between the guides and the depression walls.

Abstract: A method of obtaining fixation of an animal aortic valve intended for implantation, including subjecting the aortic valve to a tanning fluid at a differential pressure across the valve leaflets in a direction to urge the valve leaflets closed and with the tanning fluid tending to distort the aortic valve. The differential pressure across the valve leaflets is greater than zero and less than about four mm Hg. An insert restrains the valve against substantial distortion during the time the valve is subjected to the tanning fluid.

Abstract: A urine specimen collecting unit including a cup and a separate lid selectivey sealed to the cup. The cup is of a generally conical configuration tapering from a closed base to a larger diameter open upper end. The lid includes a central depression received within the open end of an associated cup, a rim surrounding the depression for engagement with the upper edge of the cup, and a skirt depending peripherally from the rim below the depression and configured for locking engagement with the cup. The lid depression is configured to receive the closed base end of a superimposed cup. A tapered spout communicates through the rim and projects upwardly therefrom to lie adjacent the outer surface of a superimposed cup and within the confines of an imaginary cylinder surrounding the rim.

Abstract: An anti-clog sink device is provided which comprises a cylindrical support piece, a screen, an elastic retainer, a detent, and a handle. The cylindrical support piece is open at one end and has teeth attached, which are located in a plane perpendicular to the cylinder axis and disposed at the second end of the cylindrical support piece, said teeth being directed to about the axis of the cylindrical support piece. The screen has a circular bottom to be seated on the teeth of the cylindrical support piece and a cylindrical rim adapted to fit into the cylindrical support piece adjacent to its inner surface. The elastic retainer is adapted to be placed inside of the cylindrical rim of the screen to retain the screen tightly in position relative to the cylindrical support piece. The detent is attached to the inside of the cylindrical support piece for preventing the elastic retainer and the screen from falling out of the cylindrical support piece at its open side.

Abstract: YAn improved automatic flushing device for valve actuated toilets that is capable of being housed inside the toilet's water tank, out of the user's sight. The conventional water supply valve system is not altered and the flush valve assembly is actuated through floating means arranged in such a way that, depending on the water levels inside the tank, will urge the opening of the flush valve. When enough water has been drained out, the action of the floating means ceases and a tripping mechanism engages locking the floating means thereby preventing it from opening the flush valve again until the tripping mechanism is triggered in response to the users removing his or her weight from the toilet seat.

Abstract: A vacuum cleaning system for a therapeutic tub that utilizes an aerating intake for jet nozzles located around the tub. A vacuum hose is connected to the air intake so that its capacity to draw in air is utilized to draw in spa water and expell it at the jet nozzles. A vacuum head, which is connected at the other end of the hose, is moved along the bottom and sides of the tub to draw in the water, as well as leaves and debris, which are trapped at a filter screen.

Abstract: A hydrotherapeutic massage structure comprising a large volume, upwardly opening water-filled container with at least one substantially vertical side, a small volume, elongate, vertically extending upwardly opening water-filled tank with substantially vertical sides and positioned adjacent said one side of the container, an elongate, vertical gate opening between the container and gate, a plurality of water jet and air aspirator nozzles carried by the side wall of the tank in circumferential and vertical spaced relationship about and disposed radially inwardly toward the central vertical axis of the tank, air supply means connected with the nozzles and water recirculating means drawing water from the container and delivering it at high pressure to the nozzles. The tank is slightly greater in diametric extent than the major diametric extent of a person standing substantially upright at the center of the tank and is substantially equal in vertical extent with the shoulder height of the person.

Abstract: A unit of furniture readily convertible from a settee to a sleeper has a base member on which a seating member is normally disposed in overlying disposition and hingedly attached thereto by upholstery covering along a common edge thereof. The seating member has a pair of arm supports hingedly connected to the base member along the same edge. At least one back support is hingedly connected to the seating surface of the seating member for pivoting from a substantially upright disposition onto the seating surface. A bolster member is hingedly connected on the top of a rear cross member for pivoting into the space left vacant by the back support members when the latter have been pivoted onto the seating surface. When the back support members and bolster members are so pivoted into side-by-side disposition with the base member for use as a sleeper.

Abstract: A motorized invalid walker and transfer device having an armpit lift lever. The lift arms are pivoted to a front stationary crossbar above a wheeled chassis, and the arms are actuated by a motorized-gear reduction device, the output of the shaft of which drives a jackscrew and a power tube connected at the opposite end to a transverse tube positioned forward of the first mentioned cross tube. The lift arms are automatically shifted in a gentle arc.

Abstract: The invention provides a process for rendering textiles or barrier fabric material flame retardant and smolder resistant with a flame retardant and smolder resistant composition comprised of an aminophosponate ester in combination with a thermosetting, nitrogen-containing resin and preferably a reactive elastomeric latex.

Abstract: A bee hive assembly comprising one or more hive elements supported as a stack on a base element and covered by a roof element. Each hive element comprises a frame having at each of two opposite sides a window-like frame opening covered by a transparent panel. A liquid storage tank is fittingly mounted in the frame opening inwardly of and spaced from the transparent panel. The storage tank has transparent walls, a removable cover closing its upper side, and a drinking trough formed at the bottom end of the rear wall of the tank and having a width smaller than the width of the body of a worker-bee. The tank is provided with a liquid level control for maintaining the liquid in the drinking trough at a constant level which is accessible to the bees from the interior of the hive.

Abstract: At least two plates hinged along a confronting pair of edges by hinge members having depending feet which hold the two plates slightly elevated along the hinge and allow the plates to assume relative positions which subtend whatever appropriate angle is necessary for the unhinged ends of the plates to establish contact with a loading dock surface and truck cargo area surface when the two plates are used as a ramp for transferring cargo on dollies or the like between the dock and truck.

Abstract: A machine for floor maintenance comprising an electric motor in which armature coils are included in a stator and pemanent magnets are included in a rotor. The armature coils are disposed substantially radial to the axis of the stator with the axial extent of each coil lesser than the radial extent of each coil, and the permanent magnets of the rotor are disposed substantially radially to the axis of rotation of the rotor with the axial extent of each permanent magnet lesser than the radial extent of each permanent magnet. A three phase switching circuit excites the armature coils to impart rotation to the rotor. As a consequence thereof, the motor has a configuration conforming substantially to the pad or brush of the machine. The pad is attached to the rotor by a pad holder which is formed with a convex surface for engaging the pad.

Abstract: A windshield wiper clip for the selective detachable attachment of a windshield wiper assembly to at least two wiper arms of the hooked end type having arm ends of different transverse widths. The clip body is shaped to fit within the hooked end of a first wiper arm of wider width having a respective first angular orientation and said clip body has a groove for the reception therein of a hooked end of a second wiper arm of narrower width being disposed in a respective angular orientation different from the first angular orientation.

Abstract: A sewer cleaning vehicle has a swilling or clean water tank for supplying a sewer cleaning hose having a sewer cleaning nozzle and designed to be lowered into a sewer to be cleaned, a waste tank and a pumping connection joining the waste tank with the swilling water tank. Furthermore, there is a water cleaning unit as part of a system for topping up the swilling water tank with water from the waste tank. For producing a high level of setling effect in the swilling water tank, this tank has generally upright separating walls for causing a division into a number of spaces placed hydraulically in series, the most upstream space being that joined up with the pumping connection.

Abstract: An apparatus for cleaning a carpet which includes two reservoirs mounted on a frame over the rear wheels of a truck to store a supply of cleaning fluid which is heated in a heat exchanger is disclosed. The reservoirs reduce the sloshing of fluid when the truck is in motion. Pivot flanges are used to balance the reservoirs on the frame to provide effective transfer of the apparatus from one truck to another. The truck engine generates heat energy which is convectively transferred to the engine coolant fluid which is subsequently cycled through the heat exchanger. The cleaning fluid is also transported to the heat exchanger where heat transfer takes place between the cycling engine coolant fluid and the cleaning fluid. The cleaning fluid is heated to a higher temperature condition prior to being sprayed on and into the rug while the engine coolant fluid is cooled prior to being recycled through the engine.

Abstract: A vacuum cleaner for selective conversion between on-the-floor and above-the-floor cleaning. The basic upright vacuum cleaner includes a joint with a through passageway connecting the handle to the floor nozzle and through which the suction air passes. The joint includes a wall with a selectively openable passageway into which an adaptor, coupled to a hose, may be selectively inserted. Insertion of the adaptor cuts off the suction path to the floor nozzle and creates a suction path through the adaptor and associated hose to a wand and cleaning tool.

Abstract: An adjustable structure comprises two panels 24 carrying at adjacent edges respective members 11, 13, each having ribs 14 and grooves inter-engaging with one another after the fashion of gear teeth so that the members 11, 13, can roll relative to one another about respective axes parallel with the panel edges. Each member 11, 13, carries within a respective longitudinal passage 33 resilient spindle elements 35 disposed substantially coaxially with the member 11, 13, and resiliently displaceable, at least in part, transversely of said axis. The members 35 are held together by connecting links 46 providing hooks receiving respective resilient spindle elements 35 of the two members, slots 32 being formed in the members 11, 13, for passage of the links. The configuration of the links 46 and the spindle elements 35 is such that resilient displacement of spindle elements 35 transversely of their axes, towards one another, is necessary to apply the links to or detach the links from the spindle elements.

Abstract: An apparatus for removing solid particles from a pasty mass, in particular for removing bone particles from a mass of meat particles, in which the mass is advanced through at least one slit-shaped channel defined between two walls spaced apart in parallel relation at least one wall being provided with apertures having a diameter smaller than the smallest of the largest dimension of the particles to be removed, and the spacing between the walls being smaller than the smallest of the largest dimension but larger than the largest of the smallest dimension of the particles to be removed. During the advancement of the mass through said channel a scraping action is exercised over the inner surface of the apertured wall by means of one or more scraping elements.

Abstract: The invention provides a creel for feeding slivers (21) of fibers to a processing machine (10), comprising a bank of feed stations (13c) to (13i) and two reserve feed stations (13a) (13b). Upon disruption at any feed station in the bank, a reserve feed station comes into operation and is moved into the bank of feed stations, while the station where the feed was interrupted is moved to a reserve feed station position. Movement of the stations is effected by moving a carriage at a station, which includes feed rollers, sensors etc. to the required positions. The carriages are moved along a first rail in an upstream position and a second rail in a downstream position and are transverable between these rails.

Abstract: In connection with a device for tightening a rope, preferably an electric wire, it is suggested to use a base member (101) adapted to be attached to the support along which the wire (117) is to be stretched, resilient means (104a, 104b) which are carried or held by the base member (101) as well as a holding member (111) which can be displaced relative to the base member 101 under the influence of the resilient means (104a, 104b), and which is adapted for the rope or wire (117) to be attached thereto, the holding member (111) after the wire (117) has been attached to it, being displaceable from a preloaded installation position in which the wire is stretched and fixed to the holding member (111), to a wire tightening position, in which the holding means 111 via the resilient means (104a, 104b) transfer a tightening force to the wire (117).

Abstract: A locking device for cords of a sun-blind or the like having an upper beam and one or more webs of sun-blinding material connected thereto. The cords extend through the internal space of the upper beam and leave it for opening or closing the sun-blind. The locking device consists of a U-shaped portion in the legs of which a tumbler is pivotably supported at the one end. The free end of the tumbler is biased in the direction of the bottom of the U-shaped portion. The cords extend between the free end of the tumbler and the bottom of the U-shaped portion and are locked when they are clamped between said free end and bottom resulting from the bias force.

Abstract: The latching device includes a tongue unit engageable with a clasping unit having a pair of divergable leaf members. The leaf members are held in superposed relationship by a clip member that extends from one leaf member to the other. An elastomeric or spring washer disposed on the clip member helps maintain the tongue unit and clasping unit in locking engagement. The locking engagement of the tongue unit and clasping unit is accomplished by establishing interference between a catch surface on one of the units and an abutment surface on the other unit. Release of the latching device is obtained when the leaf members of the latching unit are diverged against the influence of the elastomeric or spring washer to bring the abutment surface and the catch surface out of interference with each other thereby permitting withdrawal of the tongue unit from the clasping unit.

Abstract: A plastic snap-hook for hooking belts to rings secured to articles of various kind comprises two sections only; one base section, shaped as a strip folded at one end thereof on itself in the form of a hook and folded at the other end on itself as a flexible tongue; and a second section in the form of a slider engaging the lateral edges of said first section and adapted to slide between a closed and an open position of the hook. The flexible tongue tends to bring the slider back in the closed position of the hook when said slider moves from said closed position.

Abstract: This invention relates to a process of producing plate grids for a lead acid storage battery. The process of the invention comprises the step of striking hard particles against surfaces of grid material to form roughness on the surfaces of the plate grids. The hard particles may be struck against surfaces of a lead alloy strip which the plate grids are to be made of by expanding or punching. They may be struck against surfaces of a mesh-like lead alloy strip which is formed by expanding or punching a lead alloy strip. Otherwise, they may be struck against the surfaces of a lead alloy strip and then against the surfaces of the mesh-like lead alloy strip which is formed by expanding or punching the roughened lead alloy strip.

Abstract: Tools for setting precious and semi-precious stones in metal, and methods for using such tools to set such stones quickly and to accomplish such setting in the absence of chisel marks in the finished products. A first tool includes a disc-shaped rotating grinding member that has a beveled cutting edge for trimming excess metal prior to making the setting. A second tool has a disc-shaped rotatable cutting member having a kerfed cutting edge that produces parallel channels in such metal to thereby define a linear bar means therebetween which bar is manipulated by a conventional tool to form beads that retain the stones within their respective settings. The inventive method contemplates the use of the beveled edge tool to form beveled reflective surfaces on opposite sides of the stone, and use of the kerfed-edge tool thereafter to form the bead-producing bars. An alternative method contemplates using the kerfed edge tool first, followed by the beveled edge tool.

Abstract: There are disclosed two embodiments of a gate valve having a forged body in which a generally rectangular cavity to receive the gate for opening and closing each flowway through the body is formed by drilling a first hole within the forging from which the body is to be made, and then drilling at least one other hole within the forging which is parallel to and overlaps a prior drilled hole therein.

Abstract: A method for the manufacture of heat exchangers where tubes of rectangular section are assembled with dissipators for forming a plane core which is curved by applying a bending force on the small sides of the tubes, thereby making cores. These cores are assembled by engaging the ends of the tubes into tubular plates which are part of boxes.

Abstract: A tool for extracting an object from an assembled arrangement, for example, a low and reverse gear clutch housing from a planetary gear arrangement. The tool is made of an outer cylindical hollow member and an inner cylindrical hollow member telescopingly arranged in the outer cylindrical member such that the outer cylindrical member is telescopingly movable relative to the inner cylindrical member. Elongated legs extend from the outer surface of the outer cylinder over the outer surface of the inner cylinder, and each leg is made of a flexible material and includes a cam at the free end thereof. A stop consisting of three fins is disposed inwardly of the inner end of the inner cylindrical member.

Abstract: A method of and apparatus for manufacturing a continuous slide fastener stringer chain including space portions devoid of coupling elements at longitudinal intervals. A pair of continuous stringer tapes is continuously fed, in synchronism with sewing machine, to a sewing area of the sewing machine, while a pair of interengaged rows of coupling elements is intermittently fed, in synchronism with the sewing machine, to the sewing area. A length of coupling elements is cut off from the pair of interengaged rows of continuous coupling elements each time the latter stops moving.

Abstract: A method of and apparatus for detecting ends of successive fly strips connected end to end by a slide fastener chain. The successive fly strips, with their first flaps superimposed on a tape of one fastener stringer and with their second flaps superimposed on the other fastener stringer, are fed along a first straight path. The successive second flaps are deflected or moved aside, as they pass a wedge-shaped plow on the first straight path, to such an extent that the individual second flap lies at a right angle with respect to the general plane of the fastener stringers. Then, the direction of movement of the successive fly strips is shifted at a turning point to a second straight path inclined with respect to the first straight path so as to provide temporarily a relatively large triangular space between an adjacent pair of the deflected second flaps when the same confronting ends arrive at the turning point.

Abstract: In preparation for reclaiming and recycling the material of construction of a plastic bottle, the friction-fitting base, if any, and bottle cap can be separated from the bottle body by cutting through the cap and base. The cap and base are cut in a plane in which the bottle's longitudinal axis lies. Alternatively, two cuts are made in parallel planes that are also parallel to the bottle's longitudinal axis.

Abstract: A method of assembly of a shock absorber is disclosed. A cell, formed of plys of polymeric material impervious to hydraulic fluid and a high molecular gas, while pervious to air and water vapor, is wrapped about the inner tubular container, secured thereto by clips at a midsection of the cell, and effectively inserted into the outer tubular container even though the cell contains a predetermined quantity of gas. The containers can preferably be filled with hydraulic fluid prior to insertion.

Abstract: A machining system for oil well sucker rods wherein the rod end to be machined is held in a non-rotating fixture rigidly without release throughout rough machining, finish machining and roll threading operations including a conveyor system for transporting fixtures with rods to successive stations for performing successive operations.

Abstract: Apparatus for simultaneously changing all of the tools in a multiple spindle machining center is provided with a number of tool carrying devices, each device corresponding to a different one of the spindles. Each tool carrying device is capable of selectively engaging each of a number of tools which are dedicated for use with one of the spindles, and is further capable of carrying engaged tools between one of the spindles and one of a plurality of tool storage magazines. A first linear translation device moves each of the tool carrying devices in parallel relationship with a first axis when the tool carrying devices are carrying tools between the spindles and the magazines, and a second linear translation device moves the tool carrying devices in parallel relationship with a second axis during such tool carrying operations, the first and second axes being in orthogonal relationship.

Abstract: A machining center of the type incorporating a spindle for driving tools wherein the spindle is movable rectilinearly along the axis of the spindle for engaging tool holders to move tool holders, and tools secured thereto, into an operative position wherein the tools contact a work piece. The rotational speed of the spindle, as well as its rectilinear motion, is controlled by a programmed numerical control center which also controls the bed upon which the work piece is mounted; the bed is movable, at predetermined rates, in the X, Y and Z directions. A positioning means, such as turret or carousel, is positioned beneath the spindle and is used to hold several tool holders, each of which supports tools for use in the machining operation. The tool holders are temporarily secured in the positioning means and are removed therefrom through the operation of the lowering spindle; the tool holders are formed in three sections, the first of which contacts and is driven by the rotating spindle.

Abstract: A method of forming on a substrate a layer of silicon-rich metal silicide such as tungsten silicide, WSi.sub.x where x>2 by cosputtering a tungsten disilicide (WSi.sub.2) target and a doped silicon target on to the substrate which is maintained at room temperature. When the silicon-rich silicide is deposited on a doped polysilicon layer the resulting silicon-rich metal silicide/polysilicon sandwich layer has a low resistivity and is suitable for forming therefrom gates and interconnecting conductors for integrated circuit devices.

Abstract: A semiconductor device, such as a MOSFET or IGR, is fabricated with a base region having a deep portion for reducing parasitic currents. A wafer is provided having an N type layer on an appropriately doped substrate. A first oxide layer is formed on the wafer, and a refractory electrode layer is deposited on the first oxide layer. A first window is opened in the refractory electrode layer, and then silicon nitride is deposited on the wafer. A second window is opened in the silicon nitride layer, within the first window. A deep P.sup.+ base region is diffused into the wafer through the second window, and then a second oxide layer is selectively grown in the second window. The silicon nitride layer is selectively removed, thereby opening a third window, defined by the second window and the second oxide layer situated within the second window. A shallow P base region is diffused into the wafer through the third window, followed by diffusion of a shallow N.sup.+ region through the third window.

Abstract: Improved self-aligned semiconductor devices are made using two sets of superposed pattern forming layers; a master mask layer set containing the self-aligned patterns, and a pattern selector layer set which allows different apertures in the master mask layer to be selectively re-opened so that different device regions may be sequentially formed. The master mask layer is a double layer of a first material resistant to typical device forming processes, covered by a second etch stop material. The selector layer may be a single process resistant material or a double layer. Using combinations of silicon oxide and nitride, the process is applied to the formation of silicon islands with emitters and emitter, base, and collector contacts self-aligned to each other and a surrounding oxide isolation region. Significant area and cost savings are achieved without additional masking steps or precision alignments.

Abstract: A method is disclosed for the self-aligned manufacture of a semiconductor device having island insulation obtained by thermal oxidation. An insulating layer (preferably of silicon oxide), a layer of silicon nitride, and a layer preferably of aluminum oxide are provided successively on the semiconductor surface. In the last-mentioned layer a basic mask is formed having apertures at the area of all the semiconductor zones to be formed and at the area of the island insulation zones. From this mask the various processes are carried out via a replica mask obtained in the nitride layer.

Abstract: A method of assembling a dc permanent magnet machine using a high permeability epoxy iron mixture to join magnets and flux guides. The epoxy iron mixture serves as an adjustable spacer. The epoxy iron mixture which can be half iron powder and half epoxy by volume, is situated between the magnets and the flux guides and the rotor inductance is measured while compressing the machine in a fixture until a predetermined value of rotor inductance is achieved.