Abstract: A rate detection system (10) uses a balanced resonant sensor (12) having first and second tines (14,16) interconnected with a mounting pad (20). A sensing circuit (50) including a tunnel effect displacement sensor (38) having a first probe (40) connected to the mounting pad (20) and a second probe (42) connected to a reference pad (32) detects an output signal having a Coriolis component. A feedback circuit provides a compensation signal to the balanced resonant sensor (12).

Abstract: A method and apparatus for the acoustic examination of a monolith for damage, wherein a blow of defined force is applied by a hard striker to a monolith for its acoustic examination for damage. The sound pressure distribution over a predetermined frequency range, of the sound radiated by the struck monolith is analyzed by a frequency analyzer and the result is compared with a reference curve defined for undamaged monoliths. The device for implementing the process has a receptacle for the monolith to be examined, a striker, capacitor microphones as the sound pressure receivers and an evaluation unit with a frequency analyzer.

Abstract: A system for detecting wood-destroying insects by sensing acoustic emissions generated by the insects as they feed. The system comprises two acoustic emission sensors, an amplification section, a signal processing section and an indicator section. The system comes into mechanical contact with the wood to be inspected through the use of a bolt which is inserted into the wood and attaches to an acoustic emission sensor or through the use of an adhesive layer which directly attaches an acoustic emission sensor to the wood. The acoustic emission sensors are electrically connected to the amplification section which is electrically connected to the signal processing section. The signal processing section is capable of distinguishing between insect-caused acoustic emissions and noise-caused acoustic emissions detected by the acoustic emission sensors. The results of the signal processing section are sent to the indicator section.

Abstract: An instrument carriage for inspection of piping comprises front and rear leg assemblies for engaging the interior of the piping and supporting and centering the carriage therein, and an instrumentation arm carried by a shaft system running from the front to rear leg assemblies. The shaft system has a screw shaft for moving the arm axially and a spline gear for moving the arm azimuthally. The arm has a pair of air cylinders that raise and lower a plate in the radial direction. On the plate are probes including an eddy current probe and an ultrasonic testing probe. The ultrasonic testing probe is capable of spinning 360.degree. about its axis. The instrument carriage uses servo motors and pressurized air cylinders for precise actuation of instrument components and precise, repeatable actuation of position control mechanisms.

Abstract: A pressure sensor sub-assembly (18) has a solid-state sensing element (22) mounted on a laminated ceramic substrate (20) and has the electrical signal contacts (22a) on the sensing element electrically connected to connector pins (24) on the substrate. A manufacturing process can fabricate a batch of sub-assemblies on a substrate structure that is sub-divided to form the separate sub-assemblies. The sensor sub-assemblies can be tested, and graded, before or after the sub-division step, and then each mounted in a housing.

Abstract: There is provided an apparatus for measuring operating parameters of a rotating shaft, which apparatus includes an encoder module attached to a first end of the shaft, an elongate member having a first end attached to a second end of the shaft and extending along the shaft, and an encoder disk attached to a second end of the elongate member and operatively disposed in proximity to the encoder module, such that twisting of the shaft caused by torque applied thereto will cause relative angular displacement between the encoder module and the encoder disk.

Abstract: A method for determining drilling fluid density for stabilizing a wellbore including obtaining shale cuttings from a wellbore. In one embodiment of a method according to this invention, shale cuttings are obtained from a wellbore and their index properties, including but not limited to surface area, is measured; mean effective stress around the wellbore is calculated using the geostatic overburden in situ stress, the field pore pressure, and the total stress around the wellbore; the in situ shale strength is determined using a correlation between surface area, mean effective stress and shale strength; and drilling fluid density is determined using the shale strength. Methods for determining in situ shale strengths, elastic properties, pore pressures, and formation stresses of low permeability rocks.

Abstract: A device for pulling the starter cord of a lawn mower engine utilizes a pulling cable attached to a pulley wheel activated by a high torque electric motor. An elongated base supports an upright post, upon which the motor is mounted. A chute protectively guides the cable as it spans the distance between the pulley wheel and starter cord. A restoring cable, in association with a return wheel and coil spring unwind the pulling cord from the pulley wheel when the motor is deactivated.

Abstract: An apparatus for selection and engagement of selectable gear ratios in a change speed transmission is disclosed. The apparatus comprises a shaft mounted in a housing, a plurality of shift forks, and a shift plate. Each of the shift forks is axially movable along the shaft. Each of the shift forks also has a projection extending therefrom. The shift plate has a plurality of first patterns therethrough. Each first pattern includes axial and transverse pathways arranged to receive a corresponding projection such that when one of the projections is not aligned in an axial pathway of one of the first patterns in response to lateral movement of a shifting actuator, the other projections are aligned in axial pathways similarly located in the other first patterns. Subsequent axial movement of the shifting actuator imparts movement to only one shift fork to engage the desired gear.

Abstract: A steering wheel and deflection unit for a vehicle, in particular for a motor vehicle, is described, of the type in which a steering wheel is connected in an angularly rigid manner to a steering shaft and a control lever for a direction signalling device is supported radially in the vicinity of this steering wheel; the rest position of the control lever with respect to the steering wheel can be adjusted into a plurality of different angular positions.

Abstract: The present invention is an apparatus and a method for attaching a bar end to an end portion of a steerer bar to construct a bicycle handlebar system, where the end portion of the steerer bar is a thin wall hollow tubing with two opposite surfaces including an exterior surface and an interior surface. The present invention bar end assembly includes a bar end having fastening assembly engageable to one of the two opposite surfaces of the hollow tubing for attaching the bar end to the steerer bar, and an extended brace engageable to another one of the two opposite surfaces of the hollow tubing for supporting the hollow tubing, so that it will not be damaged by any stress exerted by the fastening assembly.

Abstract: A bicycle handlebar assembly (25) for damping and reducing the shock to which a cyclist is normally exposed is disclosed. The assembly includes a mounting block (256) attached to the head (12) of a bicycle front fork assembly. An upper linkage member (252) and a lower linkage member (254) that are parallel and spaced apart from each other are pivotally attached at their tail ends to the mounting block. A handlebar clamp (258) for securing a set of handlebars (24) thereto is pivotally attached to the front ends of the upper and lower linkage members. A damping element is disposed against one of the linkage members for slowing the downward movement of the linkage members and serving as a sink for a downward force applied to the linkage members when the handlebars are urged downward. In some preferred embodiments of the invention the damping member is a spring element (268).

Abstract: A stopper device comprises a rod member having a diameter which is the same as the outer diameter of the free end of the auxiliary handlebar. The rod member further includes a fastening shaft attached to the lower end portion of the rod member. The fastening shaft can be inserted into the free end of the auxiliary handlebar securing the rod member thereof. A supporting rod member is angularly formed on the upper end of the rod member and provides a solid support to the thumb of the rider.

Abstract: The maximum safe operating speed or flywheels and shafts made of low tensile strength material is often determined by the speed at which radial tensile stress exceeds a radial tensile stress limit for the material. Circumferentially wound fiber composite material, for example, has a relatively low tensile strength along the radial direction perpendicular to the fibers. To increase the maximum safe operating speed, it is therefore desirable to form a fiber composite flywheel or shaft with radial compressive prestress. Such a prestressed flywheel or shaft has an outer annulus and an inner cylinder disposed in the outer annulus, and an annular layer of solidified bonding agent within an annular region between the outer annulus and the inner cylinder, wherein the outer annulus and the inner cylinder include substantial radial prestress induced by the bonding agent. The rim portion of a flywheel, for example, is formed from an outer ring (the annulus) and an inner ring (the cylinder, which is hollow in this case).

Abstract: A rotor portion of a gas turbine engine comprises two parts which are clamped together by an annular array of bolts. Each bolt head carries a set screw which retains a balancing weight in a position on the bolt head. The balancing weights are so distributed between the bolts as to balance the rotor portion about its axis of rotation.

Abstract: A bicycle is provided that has a frame with a seat tube and a down tube aligned in the same plane, a chain stay rail, a free wheel mechanism and a crank hub. The bicycle is improved by having an enlarged crank sprocket rotatable in a plane substantially parallel to bike frame and able to provide a gear ratio of at least 4.5 to 1 with respect to the free wheel mechanism. The crank sprocket is stabilized to prevent it from wobbling and to maintain its rotation in a parallel plane. The crank sprocket is also extended away from the hub to allow the crank sprocket to rotate without coming in contact with the chain stay rail. Preferably, the crank sprocket can provide a gear ratio of 6.5 to 1 with respect to the free wheel mechanism and has a plane of rotation located at about the center of the axial width of the free wheel mechanism.

Abstract: An extendible handle for a tool to permit the user to increase the leverage applied by the tool. The extendible handle assembly has an inner handle member with a bushing affixed to its outer end. An outer handle member slides over the inner handle member and the outer handle member is hollow and contacts the bushing at the end of the internal handle. A bushing is also affixed to the inner end of the outer handle so that the handle cannot extend past the bushing on the inner handle. An air tight rearward air chamber is positioned between the outer end of the outer handle and an airtight forward chamber is formed between the internal bushing and the tool and bushing. An air passageway is provided along the internal bushing so that as the outer handle is moved in or out, this movement is damped by the necessity of air having to pass through the air passage in the internal bushing.

Abstract: Pliers arranged in an adjustable relationship including first and second facing jaw faces are arranged to threadedly receive inserts therewithin, having cylindrical or optional polygonal projections arranged for reception within an associated workpiece. The tool structure is arranged to accommodate plural sets of the projections within the handles for ease of access and use of the organization.

Abstract: A caster angle regulating tool for automobile wheels includes a prismatic head (15), a set of wheel drum plate mounting disks (18, 19, 20) interchangeably attachable by screws (25) in holes (23) therethrough to screw threaded bores (17) in bosses (16) on the prismatic head (15), a pivotable adjusting nut (11) pivotly mounted by opposite axle shafts (12) thereon in bearings (13) in brackets (14) mounted on the prismatic head, a screw threaded adjusting shaft (6) engageable in the adjusting nut (11) and a clamping device (1, 2, 3, 4) rotatably mounted on one end (5) of the adjusting screw for clamping onto a stub axle (M) attached to the wheel drum plate (R). Rotation of the adjusting shaft (6) in the adjusting nut (11) thereby moves the spring stub axle to increase or decrease the caster angle, depending upon the direction of rotation of the adjusting shaft during alignment of the wheels.

Abstract: A beverage mixing apparatus such as a coffee grinding and brewing apparatus is provided with an operative cycle which includes the transportation of a predetermined amount of a solid component of a beverage mixture from a storage compartment to and through a passageway into a mixing chamber wherein the liquid component of the beverage is mixed with the solid component. The apparatus further comprises a valve assembly associated with the passageway and having a plate movable between a closed position and an open position. The plate defines an opening which registers with the passageway when the plate is in the open position. A solenoid is connected to the plate for moving the plate between its open and closed positions. When the plate is in its open position the solid component can be moved from the storage chamber to the mixing chamber. In the closed position, the plate prevents moisture from the mixture from moving to the storage chamber through the passageway.

Abstract: Systems and methods for cutting a well casing and then capping the cut well casing are provided. A well casing cutting assembly having a tensioned wire cutting element may first be moved into position relative to the well casing and operated so that the cutting element reciprocates transversely (i.e., in saw-like fashion) while simultaneously being advanced forwardly into cutting relationship with the well casing. The cutting assembly is removed from the cut well casing and replaced with a well capping assembly having a shield enclosure and a thread cutting subassembly. The thread cutting subassembly includes an interiorly threaded pipe coupling which rigidly carries a normally open, remotely controlled valving assembly and is mounted to the shield enclosure so as to be capable of both rotational and vertical movements relative to the cut well casing.

Abstract: A machine for cutting tires into a plurality of elongated strips includes parallel cutting shafts having a plurality of cutting wheels mounted for rotation therewith. The cutting wheels are separated by annular spacers on the cutting shafts. A spacer comber partially encircles each annular spacer and has a lower portion having a rounded surface to minimize surface contact between the elongated strips and the spacer comber. After the side cutting edges of each cutting wheel becomes worn, the cutting wheels can be sharpened by surface grinding which narrows the cutting wheel. Each annular spacer and spacer comber are also narrowed by respective corresponding surface grinding of the side surfaces thereof. The machine is overhauled, after the surface grinding and the corresponding surface grinding, by the addition of at least one of each cutting wheel, annular spacer and spacer comber on each cutting shaft.

Abstract: A miter saw with an optical system for projecting an optical alignment marker onto a workpiece. The miter saw has a base, a turntable rotatably supported by the base, a fence disposed above the base for supporting the orientation of the workpiece located on the base, a support coupled to the rear portion of the turntable, and a cutting apparatus including a blade for cutting the workpiece. The cutting apparatus is pivotally coupled to the support for positioning the blade from a raised position above the workpiece to an operational position for engagement with the workpiece. The light projection system is attached to the cutting apparatus for projecting an optical alignment marker onto the workpiece so that the location at which the blade engages the workpiece is in a selectably adjustable relationship with respect to the position of the optical alignment marker on the workpiece.

Abstract: A machine head, especially for precision tuning of a guitar string or strings, avoids the slackness between the cog and worm gear drive of the existing design which can give rise to tuning slip and imprecise tuning. The proposed machine head has a spindle to which a string is secured at one end and carries an arm (2a). Adjusting screw (3) cooperates threadingly with an abutment (7) and the end of the adjusting screw bears on the arm whereby rotation of the adjusting screw determines the position of the arm and hence tension in the string.

Abstract: An adjustable bridge assembly for a stringed musical instrument utilizes individual adjustment blocks, one beneath each string, each fitted with a saddle screw having at its upper end a guidance groove supporting the corresponding string. The guidance groove may be shaped to accommodate different sized strings. The blocks, configured with elongated slots near each end engaged by screw fasteners, may be adjustably positioned prior to being fixed in place, thus enabling the bridge support point for each string to be set individually for good intonation and true octaves. The saddle screws, engaged in holes which are threaded into the block at an inclined angle so as to support each string at a well-defined point, allow each string's height above the fingerboard to be set independently for a desired tradeoff between ease of fingering and freedom from string-to-fingerboard buzz at maximum playing amplitude.

Abstract: A method and apparatus for tuning a musical instrument. Measurements are made of the inharmonicities of three notes (e.g., F3, A4 and C6 in a piano). One of the notes (e.g. A4) is a standard note that is to be tuned to a standard frequency. The measured inharmonicities of these notes determine a slope of a tuning curve and a position to intercept the standard note frequency according to the following: ##EQU1## Y(p,N) is the cents deviation relative to the equally tempered scale of partial p of note N, F is a factor by which the inharmonicity increases per octave taken from the measurement, B(N) is the inharmonicity of note N, and B(STD) is the inharmonicity factor of a standard note (e.g., A4 at 440 Hz).

Abstract: A yarn carrier apparatus particularly suited for use in braiding machinery or the like due to its capability of continuous yarn feeding and retraction of long lengths of yarn. The yarn carrier apparatus comprises a yarn supply spool which is rotatably mounted within the housing, a spring motor also mounted within the housing and operatively connected to the yarn supply spool through a mechanical transmission assembly which is adapted to multiply rotational movement between the first element of the gear assembly operatively connected to the spring motor and the final element of the gear assembly operatively connected to the yarn supply spool. The spring motor is adapted to tension the yarn during both feeding and retraction thereof, and it is further adapted to periodically rotatably slip within the housing and partially unwind so as to allow for continuous withdrawal of a long length of yarn without the spring motor becoming fully wound and preventing further yarn retraction.

Abstract: A countermass for recoilless weapons which is intended to be placed behind the projectile propelling charge (3) of the weapon and which is also intended to depart together with the propellant gases exiting rearwardly from the weapon when the projectile is propelled forwards. The countermass includes a countermass body (5) which is deformable at the pressure and the temperature prevailing in the barrel during firing of the projectile and which has at least one gas through flow passage (6) which widens rearwardly in nozzle form.

Abstract: A rotary-ring carriage for a light weapon on a combat vehicle, especially for the hatchway of a military tank. The weapon is mounted on an undercarriage that rolls on wheels along curved rails. The rails extend along arcs subtending angles greater than .pi. rad and less than 2.pi. rad, a complete circumference. The undercarriage extends along an arc subtending an angle greater than the difference between 2.pi. rad and the angle subtended by the rails.

Abstract: An electrohydraulic servovalve including a tailoring circuit coupled to provide a predetermined input signal to the motor of the valve. The predetermined signal functions to control the flow of fluid from the valve to effect a desired result. The electrohydraulic servovalve includes a housing defining round flow ports with a spool valve for metering flow through the ports. The spool valve substantially overlaps the round flow ports. The tailoring circuit includes a plurality of amplifiers each of which has a different gain. A command signal is applied to the amplifier and the output from the amplifiers is summed to provide an input signal to the motor of the electrohydraulic servovalve.

Abstract: Disclosed is an improved spring brake assembly, and a method for making same, which is particularly resistant to unauthorized disassembly and its consequent hazards. A diaphragm is locked between two opposing portions of a housing. The two opposing portions of the housing are both made of steel and are welded rather than clamped to one another. The weld is performed in such a way that the diaphragm is not burnt or otherwise damaged by the welding process. The opposing portions are configured as a cylindrical coupling between a male member having an inwardly extending lip, and a female member preferably having an inner circumferential ledge, which cooperate to trap the periphery of the diaphragm at an end of the coupling remote from the weld.

Abstract: A temperature control device and method for controlling water temperature for a fill water displacement beverage brewing apparatus. The beverage brewing apparatus includes a heated water reservoir for retaining a predetermined volume of water in a heated state and a thermostatically controlled heating device for heating the water in the heated water reservoir within a predetermined temperature range. The temperature control device includes a brew cycle activation device which automatically overrides the thermostatically controllable heating device for activating the heating device upon initiation of the brew cycle. The method heats fill water introduced into the reservoir regardless of the temperature of the water retained in the heated reservoir to reduce the time required to heat fill water to a desired water temperature.

Abstract: A combination beverage brewer with cold water supply is embodied within a housing, to furnish a beverage brewing segment, at one or more locations within a housing, and a water chilling or cooling supply disposed in association therewith, to supply cold water as required. The beverage brewer incorporates a hot water tank, a heating element therein, which hot water is delivered to a spray head for deposit onto a basket of grounds for brewing of a beverage. In addition, hot water may be tapped from the tank and delivered to a faucet for direct dispensing. The cold water segment of the apparatus includes a cold water tank, a cooling rod therein, cooling module for operating as a heat pump for extracting warmth from the water to heat it, and delivery of the extracted heat to a heat sink, for dissipation.

Abstract: A two-compartment, automated apparatus and a semi-batch process for achieving rapid and complete thawing of a frozen food product, such as french fry potatoes, prior to cooking are disclosed. This invention results in a rapid, economical thawing of frozen food that is especially compatible with automated, commercial-scale deep frying operations.

Abstract: Disclosed is an improved apparatus and method of manufacturing wood trusses which utilizes an apparatus and method incorporating the use of a vibrator and the application of vibration forces during the process of seating connector plates in the wood cord members of the truss.

Abstract: The present invention is to provide a fail-safe slide operation control device for a press of simple structure when the electronic circuit by fail-safe signal processing as a circuit for monitoring overrun and confirming the OFF condition of an operation button, which is important function to control the slide, is used instead of a contact circuit composed of relays.

Abstract: A shutheight adjustment system incorporating hydraulic tie rod nut assemblies for dynamically altering the tensioning and compression of the tie rods of a power press. Each hydraulic tie rod nut assembly includes a cylinder with an inner sliding piston threadably engaging the tie rod. A pressurizing mechanism injects pressurized fluid within a chamber formed by the piston and cylinder. By increasing pressure within the chamber of the hydraulic tie rod nut assembly, compression between the press bed and press crown may be increased thereby reducing the press shutheight.

Abstract: A printing apparatus for printing an identification display such as schema numerals, symbols or the like for a wire material on the outer peripheral surface of the wire materials such as an electric wire cord is disclosed. The printing apparatus for the wire material is provided with a selection and drive unit for feeding, respectively, plural kinds of wire materials and selecting a wire material corresponding to a wire material to be printed and with a movable printing unit to be moved to a position corresponding to the wire material fed from the selection and drive unit to perform the printing operation.

Abstract: A printer for printing a stencil image on a sheet is provided having a scraper which prevents ink from flowing axially outward beyond the ink supply roller. The scraper can be connected to a plate which supports the ink supply roller and preferably includes a portion extending toward and/or contacting the ink supply roller.

Abstract: To form a good perforation image and prevent oozing of the ink in the processing of plate making, a heat sensitive stencil 10 is generally made of a heat sensitive film 12, a non-woven fabric 16 impregnated with ink, a separator 14, a frame 18 located so as to surround the non-woven fabric 16, and a film 20 as a base having an ink impermeability. The separator 14 is located between the heat sensitive film 12 and the non-woven fabric 16. An end portion of the separator 14 is inserted through a slit 18c of the frame 18, and extends through between the frame 18 and the film 20 to the outside of the heat sensitive stencil 10.

Abstract: This invention relates to an offset type rotary press adapted for a color printing system, with printing sections, which prevents print-shears and produces printed matter in high quality. The system of this invention includes an extending area, which supplies to the travelling paper web the power to extend in the width direction, and at least two printing sections arranged in sequence at the position where the paper web travels after passing through the extending area.

Abstract: An RF-insensitive semiconductor ignitor and primer cup assembly is created sing a double polished n-type silicon substrate having its top and bottom surfaces partially metallized to form Schottky barrier diodes. The metallized portion of the back side of the substrate is placed in contact with a conductive surface, and means are provided to electrically isolate those portions of the substrate which have not been metallized from both the metallized portions and the conductive surface. In one embodiment, the isolating means is an integral oxide ring which extends from the periphery of the contact metal to the edge of the substrate. In another embodiment, the means of isolation is a separate plastic ring.

Abstract: The invention relates to a successive-actuation device of the type including at least one pyrotechnic cord and a trigger for actuating the operation thereof. Advantageously, the invention contains at least one element made from a shape-memory alloy having two stable states and disposed along the pyrotechnic cord, the element being capable of actuating a subsequent operation when it passes from one of its two stable states, for which the element occupies a neutral position, to its other stable state for which is occupies an active position, under the action of the heat generated by the pyrotechnic cord after triggering.

Abstract: The invention relates to a method for tilting of the car body in track curves on a railbound vehicle, the tilting of the car body being achieved by means of hydraulic cylinders and the tilting being adapted to be controlled by one or more servo functions. According to the invention, the car body tilt is adapted to be limited to a maximum value, and when snow occurs, which is packed between the different parts of the tilting system, the degree of snow packing is indicated, and when a certain degree of snow packing is exceeded, the desired value of the tilt angle is maximized to a suitable smaller value.

Abstract: A side body structure for vehicles is formed of a plurality of sections. Each of the sections has a reinforcement formed as an integrally continuous construction. The reinforcement has a plurality of through holes which reduce the total weight of the reinforcement. The reinforcement further includes a plurality of ribs formed around the holes and is securely fastened together to a surface of an outer plate.

Abstract: A corrugated paperboard pallet includes a base member having first and second pairs of opposite sides and a plurality of column-shaped support members secured to the bottom side of the base member. The support members have apertures at opposing ends for receiving flaps from the base member and support blocks, so as to secure the support members to the base member and to provide additional strength to the pallet, respectively. This pallet design can be conveniently shipped and stored until ready for use, and can be entirely assembled by the user.

Abstract: There is disclosed a lightweight pallet base of unitary, one piece construction fabricated of a stiff foldable sheet material such as corrugated cardboard. In one aspect the pallet comprises a central platform having foldable corner and side flaps attached to the central platform. The corner flaps and a portion of the side edge flaps adjacent the corners are folded and interlocked to form corner support members. The central portion of the side edge support members are folded to form side edge supports located midway between the corners of the platform. The support members are of one piece construction with the central platform with the pallet being assembled from a die cut blank. Different embodiments of the unitary pallet use the foldable side edge flaps located adjacent the corner flaps in different ways to reinforce the corner support members. In another aspect a load bearing pallet tray is secured to the unitary pallet base which provides a combination having improved beam strength.

Abstract: In a linear or straight guide (2) for a height-adjustable table, a stationary frame component (4) and a moving frame component (6) are in form-fit sliding contact in the manner of a sliding guide, with the moving frame component (6) being guided with a little play in the stationary frame component (4) designed as a hollow profile. A height-adjustable table equipped with this linear or straight guide is characterized in particular by the extremely quick damping of impact-induced horizontal oscillatory movements of the table top in longitudinal direction.

Abstract: There is disclosed a security enclosure including a folded, flexible, electrically insulating sheet extending over the whole of the area of the enclosure and carrying lines of electrically responsive material on each side, the lines defining a conductor extending over both sides of the sheet, electrical connections between lines on one side of the sheet and respective lines on the other side of the sheet being provided by line connections extending through the sheet and at selected edges of the sheet the line connections being spaced inwardly of the edge and separated from the edges by a respective line-carrying portion of sheet. The enclosure includes a circuit for detecting a change in an electrical characteristic of the conductor caused by an attempt to penetrate the sheet.

Abstract: An apparatus for controlling the injection quantity of pulverized coal by measuring the flow rate of the pulverized coal in a conveying pipe, through which the pulverized coal is injected into tuyeres of a blast furnace, in order to regulate the opening of a valve installed between a feed tank and the conveying pipe based on the measured flow rate, and also by regulating the internal pressure of the feed tank so as to maintain the difference in the internal pressure between the feed tank and the conveying pipe within a predetermined range. The thus configured apparatus provides rapid-response and high-accuracy in control, wide-range controllability, and allows to control the injection quantity of the pulverized coal even when supplying the pulverized coal to the feed tank.