Abstract: Suction muffler for a compressor including an inlet for introducing a refrigerant into the suction muffler, a chamber for temporary storage of the refrigerant and dropping a pressure of the refrigerant by means of a sudden increase of a volume of the refrigerant, a resonator for attenuating a noise of a specific frequency, a refrigerant supply tube for leading the refrigerant from the chamber to a cylinder, thereby stopping transmission of a pulsating flow occurred by the piston movement in the cylinder to outside of the refrigerant supply tube and preventing transmission of a noise from a suction valve and a discharge valve to outside of the suction muffler, wherein the chamber includes a vibration member having a vibration frequency corresponding to a pulsation frequency occurred at the refrigerant supply tube, thereby increasing supply of refrigerant to the cylinder and improving a performance of the compressor.

Abstract: Vapor compression heat exchange systems are disclosed that are designed to allow for optimal mass flow of refrigerant there through. The systems of the present invention do not employ conventional refrigerant metering devices, such as capillary tubes and expansion valves, which restrict mass flow, but rather incorporate an openly fixed orifice in-line with the conduits connecting the condenser to the evaporator, thereby maintaining the pressure differential between the high pressure condenser side and low pressure evaporator side of the system during operation. Provision of the fixed orifice allows for optimal refrigerant mass flow as measured by cooler compressor temperatures, cooler compressor discharge temperatures, increased heat of rejection, increased heat of absorption, and improved heating and cooling efficiency. The present invention may employ any conventional refrigerant, including the newer HFC refrigerants, such as R-410A.

Abstract: The object of this invention is to provide a heating apparatus with low compression load. This heating apparatus consists of an expansion unit for adiabatically expanding refrigerant, an indoor unit having a heat exchanger, a compressor for adiabatically compressing the refrigerant, and an outdoor unit having a heat exchanger, and sequentially circulates refrigerant through the compressor, indoor unit, expansion unit, and outdoor unit to heat a target area using the phase change of the refrigerant. In an embodiment, the apparatus (100) is designed such that the refrigerant from the indoor unit (140) passes through a heat exchanging and evaporating unit (110) prior to flowing into the expansion unit (120), with the refrigerant from the evaporating unit (110) partially flowing into a sub-expansion unit (130) to become low temperature, low pressure bypassed refrigerant. The bypassed refrigerant from the sub-expansion unit (130) passes through the evaporating unit (110) prior to flowing into the compressor (150).

Abstract: A heat exchanger tube in a heat exchanger for an ice making machine includes a bimetallic heat exchanger tube to improve capacity and wear characteristics of the heat exchanger. The heat exchanger tube has an outer portion with a first material composition and an inner portion with a second material composition where the first material composition is different from the second material composition. The first material composition is compatible with the refrigerants used in the heat exchanger unit of the ice making machine. The second material composition is compatible with the feed solution being chilled in the heat exchanger tube.

Abstract: An object of the present invention is to provide a refrigerant in which an odorant is added, the odorant being compatible with refrigerants and refrigerating device oils, and having no reactivity with refrigerating device oils and materials forming refrigerating circuits, and to provide a refrigerating device in which the refrigerant is circulated in the refrigerating circuit.

Abstract: The present invention provides an adsorption-type cooling apparatus comprising first, second, third, and fourth adsorption devices filled with a coolant and contain adsorbents which adsorb evaporated coolant and desorb the adsorbed coolant during heating. Adsorption cores provide heat exchange between the adsorbents and a heat medium, and evaporation and condensation cores provide heat exchange between heating medium and the coolant. A cooling device in which heating medium cooled in the evaporation and condensation cores circulates and cools the object of cooling. A heating means supplies a high-temperature heat medium to the first-fourth adsorption devices. A cooling means supplies a low-temperature heat medium which has a temperature lower than that of the high-temperature heat medium to the first-fourth adsorption devices. Also, a switching control means is provided which switches between multiple states.

Abstract: The object of this invention is to provide a cooling apparatus with low compression load. This cooling apparatus consists of an expansion unit for adiabatically expanding refrigerant, an indoor unit having a heat exchanger, a compressor for adiabatically compressing the refrigerant, and an outdoor unit having a heat exchanger, and sequentially circulates refrigerant through the compressor, outdoor unit, expansion unit, and indoor unit to cool a target area using the phase change of the refrigerant. In an embodiment, the apparatus (100) is designed such that the refrigerant from the outdoor unit (160) passes through a heat exchanging and evaporating unit (110) prior to flowing into the expansion unit (120), with the refrigerant from the evaporating unit (110) partially flowing into a sub-expansion unit (130) to become low temperature, low pressure bypassed refrigerant.

Abstract: An interchangeable and rotatable jewelry display for beads or ornaments. The invention provides a stable changing and retaining mechanism. The present invention is also a method for displaying and rotating interchangeable ornaments.

Abstract: A vacuum insulating glass (IG) unit and method of manufacturing the same. A peripheral or edge seal (11) of a vacuum IG unit is formed utilizing microwave energy (17) in order to enable tempered glass sheets (2, 3) of the IG unit to retain a significant portion of their original temper strength. In certain exemplary embodiments, the edge seal may be formed of glass frit or solder glass. In certain embodiments, at least a portion (12, 12a, 301) of the edge seal material may be deposited on one or both substrates prior to a thermal tempering process so that during tempering the edge seal material is permitted to diffuse into (i.e., bond to) the glass substrate(s) (2, 3). Optionally, additional edge seal material (303) may be added after tempering. The final edge seal (11) is preferably formed via microwave heating (17) of the edge seal material.

Abstract: A method for edge finishing glass sheets. Glass sheets are separated into desired sizes, after which the edges of the glass sheets are finished using first grinding wheels to grind the edges, followed by polishing wheels to round off the ground edges by contacting and moving the edges of the glass sheet against stationary rotating grinding and polishing wheels which are each oriented approximately parallel to the major surface of the glass sheet.

Abstract: A microstructure is formed in a viscous glass or plastic substrate by pressing a structured surface of a forming tool corresponding to a negative of the microstructure to be produced in the viscous glass or plastic substrate. After the microstructure has been formed, the forming tool is removed from the surface. In order to help form the microstructure and remove the forming tool from the substrate the forming tool has an at least partially porous base body (1) and an operative layer (2) structured with a negative structure consisting of grooves (11) extending to the porous base body (1). The forming of the microstructure in the substrate is assisted by applying suction to the porous base body (1) so that the grooves (11) fill more easily and completely with melted glass or plastic material. The removal of the forming tool after forming the microstructure is assisted by applying an overpressure to the porous body to help release the solidified glass or plastic material from the forming tool.

Abstract: The invention relates to a method and a device for nozzle-injection of gas into molten glass.

Abstract: A method of manufacturing an integrated optic device having at least one waveguide formed in a surfaced thereof is described. The waveguide is formed utilizing a two-step proton exchange process in which the substrate is bathed in a strong acid and then subjected to a plurality of annealing cycles.

Abstract: A method for utilizing an associate network with a system for monitoring shipping may include the steps of identifying a list of associates; prescribing an access state for each of the associates; and authorizing access to the system to each of the associates in accordance with the associate's access state.

Abstract: The invention provides an improved, cost-effective means of transforming sludge or other waste from vertebrates into fertilizer comprising the steps of 1) mixing a composition containing calcium oxide (CaO) and magnesium oxide (MgO) with sludge or other waste products from vertebrates, 2) allowing the mixture to reach a temperature of about 70° C., then 3) allowing the mixture to remain at a minimum temperature of about 70° C. for a minimum 30 minutes. At the end of this time, most of the material is sufficiently dewatered and can then be bagged to be sold as an organic fertilizer.

Abstract: A process for hydroforming sheet metal, in which a blank (1) is secured with the help of a blank holder (2′, 2″, 2′″) on a matrix (4′) provided with a cavity (3′) for stamping the blank (1) with the help of a die (5′, 5″, 5′″) entering the matrix, characterized in that during the stamping phase, the play between the die (5′, 5″, 5′″) and the blank holder (2′, 2″, 2′″) is confined within a range of values preventing, between the die and matrix, the formation of a fold, as a function of one and/or the other of the following parameters: pressure of fluid in the cavity (3′) of the matrix (4′), and position of the die (5′, 5″, 5′″) relative to the matrix.

Abstract: A system and method for forming a three-dimensional wireform for heart valves from a two-dimensional starting shape. The wireform has multiple arcuate cusps and oppositely directed commissure tips therebetween, the cusps and commissure tips being oriented generally in a tube about an axis. The two-dimensional wire has three cusps and two commissure tips, with two free ends having bent segments. The wireforming system and process holds the commissure tips, or one commissure tip and one bent segment, and forms the cusp therebetween. The wire is held by two axially-parallel mandrels and cooperating clamps which axially rotate and move toward one another. A forming surface on each mandrel bends one half of the cusp, the forming surfaces being mirror images of one another. The forming surface has a complex curvature specifically designed to shape a particular size of wireform into a desired final three-dimensional shape.

Abstract: An orienting station provided particularly for press systems has a receiving device which is carried by a rod-type transmission. This rod-type transmission is supported on drive units of a driving device. The drive units are disposed in a stationary manner. The rods of the rod-type transmission are rigid and their lengths cannot be changed.

Abstract: A parts stamper which includes a pair of jaw members, including at least one movable jaw member. The movable jaw member(s) include(s) a cam bearing. The parts stamper includes an actuator which is coupled to a cam element. The cam element cooperates with the cam bearings of the jaw member(s) to cause the jaw members to open and close. The jaw members include tool seats in which various tools can be secured, including an anvil and a number backing plate.

Abstract: A dent-pulling tool for pulling dents out of the surface of sheet metal body panels of a vehicle is provided. The tool includes a specially shaped adapter or cup that is adhered to the dent with adhesive. The adapter has at least one groove, or similar formation, on the contact surface thereof to optimize adhesion. The tool also includes a removable base having a non-marring material bonded thereto. The base may include one or more adjustable feet that stabilize the tool during use. The pulling tool is attached to the adapter and continuous controlled pulling force is applied to the adapter to pull the dent back into place. The pulling tool may be ratchet, screw, pneumatically, or hydraulically activated.

Abstract: There are disclosed systems for calibrating a first position measuring component on an imaging or scanning transducer with respect to the scanning plane. Calibrations are performed by using a calibrating device including an additional or second position measuring component, such that during the calibration process, the relative position of between these position measuring components can be calculated. Calibrations are also performed by viewing targets on the scanning plane that are at a known position with respect to the second position measuring component. Calibrations are also performed based on the scanning plane and position measuring component on a guided device, such as a needle, that typically is used in conjunction with the imaging or scanning transducer. Methods for these calibrations are also disclosed.

Abstract: A shock test apparatus for evaluating the shock performance of individual disc drive components includes a base portion and a top cover connected to the base portion to define an interior volume. First and second disc drive components are secured within the interior volume of the apparatus to engage one another in the absence of a shock event. A shock pulse generator includes an actuator for imparting a shock pulse to one of the disc drive components. A second shock pulse generator can be used to impart a shock pulse to the second disc drive component. Means are included for measuring the shock imparted to the disc drive components and for measuring the interaction between the first and second disc drive components during the shock event.

Abstract: The invention relates to a method for the diagnosis of a sensor in connection with control of a combustion engine. The method includes feeding fuel under pressure (p) to the engine, detecting the pressure (p) by means of the sensor, and controlling the air/fuel mixture based on to the operating state of the engine. The invention involves an intentional modification of both the pressure (p) and injection time period (tinj) during which fuel is fed to the engine. The modifications are selected in such a way that substantially no change in the fuel flow (F) to the engine is obtained. A check is performed to determine if the modifications of the pressure (p) and injection time period (tinj) result in any unallowable deviation in the operating state of the engine. If so, an indication that the sensor is defective is provided. With the invention, an improved diagnosis method for checking the functioning of a fuel pressure sensor is provided.

Abstract: For the purpose of detecting a tumble flow in a cylinder chamber of an internal combustion engine, with a characteristic tumble value being determined as a quotient from an angular velocity &ohgr;FK of the tumble movement and an angular velocity &ohgr;Mot of the internal combustion engine, a method is proposed in which the asymmetry of a flow field WLDA in the cylinder chamber is detected for a predetermined number of measuring points i with a differential measuring method on a flow test stand and the characteristic: tumble value is determined as a result of the asymmetry of the flow field WLDA.

Abstract: An intake air-flow rate detecting apparatus of an internal combustion engine according to the present invention has a thermal air-flow sensor for detecting an intake air-flow rate of the internal combustion engine, and a response lag compensator for compensating for a response lag of the air-flow sensor, using a first-order lag element concerning a heat release amount in the air-flow sensor. Since the response lag process is carried out on the dimension of the heat release amount, the response lag of the air-flow sensor can be compensated for with accuracy and the response lag of the thermal air-flow sensor can be compensated for with high accuracy.

Abstract: A procedure and tools for quantifying surface cleanliness are described. Cleanliness of a target surface is quantified by wiping a prescribed area of the surface with a flexible, bright white cloth swatch, preferably mounted on a special tool. The cloth picks up a substantial amount of any particulate surface contamination. The amount of contamination is determined by measuring the reflectivity loss of the cloth before and after wiping on the contaminated system and comparing that loss to a previous calibration with similar contamination. In the alternative, a visual comparison of the contaminated cloth to a contamination key provides an indication of the surface cleanliness.

Abstract: An energy conserving moored buoyant ocean profiler wherein an instrument carrying vertically traversing buoyant member of low buoyancy is interconnected with a second buoyant member of high buoyancy to travel in the opposite direction at lesser distance such that the potential energy of one buoyant member is increased as the potential energy of the other is decreased, thereby conserving energy as the instrument carrying buoyant member is raised and lowered.

Abstract: A method for regulating a system for controlling the stability of a vehicle based on the forces exerted at the center of each wheel of the vehicle. Since, the actions of the driver, whether steering, accelerating or braking, are reflected by forces (variations in forces) transmitted by the tires to the ground, it is proposed to control the operating means of the vehicle (active anti-roll system, engine torque, braking torque or active steering) by force expectations derived from the actions of the driver. Depending on the speed of travel of the vehicle and the angle to the steering wheel (steering wheel velocity and steering wheel acceleration), the method expresses the inputs of the driver in terms of forces. If the actual forces that are measured do not correspond to the forces desired by the driver, the active system compensates for this difference by acting on the distributions of forces in the vehicle chassis.

Abstract: A method is disclosed for evaluating the physical properties of a sample, for example, the grain size in a polycrystalline material. An ultrasound field is generated in a local region of the sample with a non-contact source, such as a pulsed laser, such that the generated ultrasound diffuses away from said local region. After waiting until the generated ultrasound field has reached a diffusion regime, the resulting ultrasound field is measured with a non-contact detector. Parameters are adjusted in a mathematical model describing the predicted behavior of the ultrasound field in the diffusion regime to fit the detected ultrasound field to the mathematical model. In this way, parameters dependent on the physical properties of the sample, such as the diffusion coefficient and absorption coefficient, can be derived. The grain size, for example, can be estimated from these parameters preferably by calibrating the diffusion coefficient to grain size.

Abstract: In a dynamic quantity sensor for detecting a dynamic quantity, a movable portion having comb-shaped movable electrodes is connected to a base portion through a beam portion as a spring portion, and moves in direction Y upon receiving dynamic quantity. Comb-shaped fixed electrodes are arranged opposite to the movable electrodes through detection intervals. A Q value of vibration of the movable portion in the direction Y is smaller than {fraction (1/500)} of a resonance frequency of the movable portion in the direction Y. Therefore, free vibration of the movable portion is rapidly damped so as not to adversely affect sensor output.

Abstract: A cap body 3 of a synthetic resin includes a cylindrical portion 7 having an external thread 10 formed on its outer peripheral surface, the cylindrical portion 7 having at its lower end a shoulder 11 or an annular groove 12 for receiving an O-ring. The cylindrical portion has on its inner peripheral surface an annular, internally flanged valve stopper 13 which provides a support for a locking rib 17 of a pressure valve 6. The pressure valve 6 consists of deformation slits 16 formed along the outer periphery of a pot-shaped valve body 14, and a seal plate 15 disposed on the bottom surface of the valve body 14.

Abstract: The invention relates to a bending moment sensor with a bridge circuit having strain-sensitive resistors, the strain-sensitive resistors being arranged immediately on a component on which bending forces act directly without intermediate support, it being possible upon bending of the component to tap at the bridge circuit an electric signal corresponding to the strain of the thick-film resistors.

Abstract: A torque process control method and apparatus, including associated components, for fluid-powered tools such as impact and pulse-driven wrenches and nut runners.

Abstract: A rotational angle detecting device comprises a rotating member 2a, a target 20a which is provided on the rotating member 2a and whose portion to be detected is continuously changed as the rotating member 2a rotates, and one or more detecting means 1A, 1B, 2A, 2B for detecting a portion close to the target 20a and detecting a displacement angle of the rotating member 2a from the detecting means 1A, 1B, 2A, 2B in a rotational direction based on the portion detected by the detecting means 1A, 1B, 2A, 2B. Thus, it is possible to realize a rotational angle detecting device, a torque detecting device using the rotational angle detecting device, and a steering apparatus capable of easily forming targets, stabilizing a peak value of a detection signal of the detecting means and readily calculating and correcting a rotational angle.

Abstract: A seat belt tension sensor has an anchor, a seat belt tension receiver, a moving arm force responder, and an arm sensor. The seat belt tension receiver applies force from a seat belt to the force responder. The force responder is made of spring metal bent to have a base for receiving force and one or two arms that are urged to move by the received force. The arm sensor responds to the arm or arms by generating an electric signal. The anchor has an opening through which a seat belt, the seat belt tension receiver and the force responder pass. A cross member of the anchor spans the opening and withstands the large forces applied by the seat belt when the vehicle strikes an obstacle. An edge of the cross member is grooved to engage the base of the force responder in a way that provides low friction during flexing of the base. The base of the force responder operates as a low friction bearing for the movement of the seat belt tension receiver.

Abstract: In this invention, a cell parameter, for example cell volume, is determined by subjecting one or more aliquots of a sample cell suspension to one or more alterations of at least one parameter of the cell environment to identify a point at which the cells achieve a particular shape to obtain a sample specific shape compensation factor. Preferably, the environmental parameter change is a reduction in osmolality.

Abstract: A sample bag for collecting a mixture of gasses for analysis is made of a modified polymer consisting essentially of tetrafluoroethylene (TFE) and at most about 2.0 percent perfluoropropylvinylether (PPVE).

Abstract: There is provided a cam apparatus which operates an output shaft by converting a continuous rotational motion at a constant speed of an input shaft into a complex rotation superpositioning an oscillating rotational motion and a rotational motion at an inconstant speed.

Abstract: A quick-action locking device for an electric power tool including a locking spindle (4) axially displaceable in the hollow spindle (2) of the electrical power tool between a working tool locking position and a working tool exchange position, and a locking lever (6) provided at the end of the locking spindle remote from the working tool and having a slider cooperating with the locking spindle (4) for displacing the same, upon a pivotal movement of the locking lever (6), to its tool exchange position, with the slider (8) having a contact region engageable with a contact surface provided at the end of the locking spindle (4) remote from the working tool (3), and with the contact surface of the locking spindle (4) having an extent, in a pivotal direction of the locking lever (6), corresponding to at least the radial distance (a) of the contact region from the pivot axis (9) of the lever multiplied, in the locking position of the locking lever (6), by a sin (&agr;) of an angle formed by a line, which defines the

Abstract: A small size transmission adapted for use with a motor comprises a basic transmission, which comprises a basic transmission input shaft, borne in a housing by means of rolling bearings, and at least one subsequent transmission stage arranged in the housing, and a variance gear designed for meshing with a drive pinion of the motor and pressed onto the basic transmission input shaft from the input side of the transmission. A support is arranged in the housing, in fixed position relative to the housing, in such a manner that the basic transmission input shaft contacts the support, under the effect of the pressure force necessary for pressing the variance gear onto the basic transmission input shaft, so that the support essentially bears the pressure force and distributes it over the housing.

Abstract: A switch for actuating a gear on a bicycle includes a housing with an inner toothing formation, a grip part and a rotary part with a cable drum for a traction cable. The grip part having an integrally formed section for actuating an elastic element on the rotary part so that when the grip part is rotated in a switching direction which releases the traction cable, the elastic element is pretensioned until a disengagement means on the grip part disengages a pawl on the rotary part which interacts with the inner toothing formation in the housing. Both the pawl and the elastic element are connected integrally to the rotary part resulting in advantages in terms of the production and assembly of the switch.

Abstract: A bicycle shift control device includes a takeup element for pulling and releasing a shift control element, a first finger contact member, a second finger contact member, and an interconnecting member that rotates around a rotational axis. The interconnecting member interconnects the first finger contact member and the second finger contacting member so that the first finger contact member and the second finger contact member move in a same direction relative to the rotational axis. The first finger contact member has a first finger contact surface disposed on a first side of a plane, wherein the first finger contact member moves toward the plane when the takeup element moves in a pulling direction. Conversely, the first finger contact member moves away from the plane when the takeup element moves in a releasing direction.

Abstract: A bicycle shift control device includes a takeup element for pulling and releasing a shift control element, a first finger contact member, a second finger contact member, and an interconnecting member that rotates around a rotational axis. The interconnecting member interconnects the first finger contact member and the second finger contacting member so that the first finger contact member and the second finger contact member move in a same direction relative to the rotational axis. The first finger contact member has a first finger contact surface disposed on a first side of a plane, wherein the first finger contact member moves toward the plane when the takeup element moves in a pulling direction. Conversely, the first finger contact member moves away from the plane when the takeup element moves in a releasing direction.

Abstract: A bicycle cable connector for connecting a first cable to a second cable includes a first connector and a second connector. The first connector include a first cable retaining portion for retaining the first cable and a projection extending along a first connector axis, wherein the projection includes a radially outwardly extending locking member. The second connector includes a second cable retaining portion for retaining the second cable and a tubular portion defining a first connector opening for receiving the first connector therein and having a side wall extending along a second connector axis. The side wall includes a first passage for passing the locking member in the direction of the second connector axis away from the first connector opening, a second passage extending in a circumferential direction, and a recess communicating with the second passage and extending in the direction of the first connector opening for receiving the locking member therein.

Abstract: This assembly for a motor vehicle comprises a steering column comprising a steering shaft capable of turning about a longitudinal axis, a steering wheel (3) comprising an outer rim (6) and at least one spoke (8) connected by a first end (20) to the rim and by a second end (21) to the rear end of the steering shaft to drive it in rotation about its longitudinal axis, a fixed central pad (4) placed substantially at the center of the steering wheel at the rear of the second end of the or of each spoke and connected to the rear end of the steering column so as to be fixed in terms of rotation when the steering shaft is turning.

Abstract: The invention relates to a vehicle steering wheel comprising a hub, a steering wheel rim, and at least one spoke having at least one spoke section. An vibration-decoupling means is provided on the spoke which acts in all directions and at least largely isolates the steering wheel rim in terms of vibrations from the at least one section of the spoke.

Abstract: A metal bonded drilling tool which is improved in grinding performance with a long life and can drill a hole in a dry condition without the need for water. The metal bonded drilling tool includes a cylindrical body having an open front end portion, a shank integral with the cylindrical body and having a threaded hole for use in mounting the tool to a rotary tool, and numerous abrasive grains bonded to a front edge of the cylindrical body and to inner and outer cylindrical surfaces of the front end portion of the cylindrical body by a bond member formed primarily of copper alloy.

Abstract: Provided is an ultrafine nickel powder suitable for a laminated ceramic capacitor electrode material. According to the ultrafine nickel powder, cracks and/or delamination are not liable to generate in the process for producing a ceramic capacitor, and its internal electrode can be made into a thinner layer, and the electric risistivity of the capacitor can be made low. The ultrafine nickel powder has an average particle size of 0.1-1.0 &mgr;&mgr;m, having the sulfur content of 0.02-1.0 % by weight, and particles thereof being spherical, thereby exhibiting excellent properties. They can be produced by vapor phase hydrogen-reducing process using nickel chloride vapor.

Abstract: The electric arc furnace is equipped with a supersonic injector (10) comprising a so-called Laval nozzle (20) arranged at a certain distance above the bath. The dimensions of the nozzle (20) are calculated as a function of the desired flow rate of oxygen and the desired velocity of the jet, and the pressure of the oxygen at the intake of the nozzle (20) is such that the static pressure of the jet at the exit of the injector (10) is substantially equal to the pressure of the surrounding atmosphere.

Abstract: A computer-controlled band saw sharpener employing electrically powered. X and Y axis drivers, each having a reciprocating element. The X-axis driver actuates a feed finger mechanism, to index the saw in repetitive, stepped fashion, while each tooth is successively ground. In concert with the X-axis driver, the Y axis driver repetitively lowers and raises a grinding head, provided with a rotary grinding wheel. Both the X and Y axis drivers include servomotors to rotate the shaft of an elongated ball screw. A carrier box houses a non-rotatable ball screw nut. The nut travels back and forth along the ball screw shaft in accordance with its direction and extent of rotation. Drive arms for the feed finger mechanism and the grinding head mechanism are bolted at their lower ends to a threaded bushing in the nut carrier box. The computerized controller is programmable, to produce virtually any desired tooth shape in the saw.