Abstract: A superhard form of boron suboxide (B.sub.x O) comprises at least about 95% by weight of polycrystalline B.sub.6 O and has a KHN.sub.100 value of at least about 3800 kg/mm.sup.2. A method for forming the superhard boron suboxide comprises mixing stoichiometric amounts of boron oxide (B.sub.2 O.sub.3) powder and boron powder and subjecting the mixture to a temperature of about 1800.degree. C. to about 2200.degree. C. and a pressure of about 2,000 to about 6,000 psi while encapsulated by boron nitride. The boron powder comprises about 90 to 95% by weight of elemental boron (B), and at least about 1% by weight of a sintering aid, such as Mg.

Abstract: A tariff arrangement which is preferably intended for an electricity meter comprises a microprocessor, a data memory and a bidirectional interface for transfer of data with a read-out device. For the duration of a data transfer operation a timing member is activated and by way of a logic circuit inhibits a predetermined memory region to prevent data from being written thereto. The data which are stored in the memory region, for charging purposes, are therefore protected from unintentional alterations during the data transfer operation, even if the software should have corresponding defects. The function of the timing member and the logic circuit can be checked in a simple manner.

Abstract: A combined surgical drill guide and retractor is useful for treating fractures in the craniomaxillofacial region. The device comprises an L-shaped member having a first short leg and a second long leg, a major retractor extending away from the first leg in a first direction and a minor retractor extending away from the first leg in an opposite direction, an outer sleeve mounted on the first leg, an inner sleeve telescoped within the bore of the outer sleeve, and a lever hingedly mounted on the second leg of the L-shaped member for carrying out a scissoring movement in cooperation with the second leg. The major retractor and the minor retractor cooperate so that when they are inserted into an incision, they will retract the sides of the incision. The major retractor has an arcuate C-like shape so that it can extend around and behind a bone and thus act as a protective stop to prevent a drill bit from penetrating beyond the bone being drilled.

Abstract: The invention relates to a sheet delivery system for rotary cross cutters which has a stacking place and a suction brake table preceding the stacking place. Disposed preceding the suction brake table are drawing rollers which run at at least the conveying speed of the sheets arriving from the rotary cutter and which are disposed spaced out from one another on a driven shaft and between which deflecting rollers of smaller diameter are mounted for driven suction belts guided over the suction brake table. Provided in the gaps between the drawing rollers are blowing nozzles whose blowing direction is directed over the suction brake table.

Abstract: An ultraviolet-light sensitive photodiode device comprises a first semiconductor photodiode for producing a first current when illuminated by light and a second semiconductor photodiode for producing a second current when illuminated by light. The first and second photodiodes are electrically connected to produce a signal proportional to the difference between the first and second currents. The first and second photodiodes are substantially equal in sensitivity to visible and infrared light, while the first photodiode is more sensitive to ultraviolet light than the second photodiode. Thus, the photosensitive device resulting from connecting the two photodiodes has a spectrally narrow sensitivity to ultraviolet light.

Abstract: The invention relates to a cleaning and sterilizing machine for small articles, such as the closure elements for pharmaceutical containers. The machine consists of a treatment vessel which is mounted in a carrier to pivot through 180.degree. around a horizontal axis, which has a funnel-shaped lower portion comprising a closable discharge opening and to which supply and discharge lines for at least one treatment medium are connected. The discharge opening can be closed by a valve and is also constructed as a charging opening with a coupling member. Connectable in sealing-tight and supporting manner to said coupling member is a charging and discharging container for the articles to be treated which has a matching coupling member disposed at a charging and discharge opening closable by a valve in a funnel-shaped upper portion of the charging and discharge container.

Abstract: An arrangement for the control of an operating installation of a building automation system is disclosed. The arrangement comprises a control module serving as a master transmitter-receiver and at least one function module serving as a slave transmitter receiver. A bus connection including a bus rail connects the control module and the at least one function module for the transmission of addresses and data and for the transmission of operating voltages. The bus rail is installed electrically at the periphery of the installation so that the at least one function module is connected to a plurality of conductors forming the bus rail and directly to the installation so that the function module serves as an input/output terminal of said installation for the transmission of process parameters.

Abstract: A device for optically measuring a pressure difference in a medium by means of a Fabry-Perot interferometer, comprises a transparent plate and a diaphragm block connected to the transparent plate, the diaphragm block comprising a substrate, a measuring diaphragm formed along the inner surface of the substrate, and a spacer separating the inner surface of the transparent plate and the inner surface of the substrate. A first planar mirror is disposed on the inner surface of the plate and a second planar mirror is disposed on the inner surface of the measuring diaphragm so that they constitute the Fabry-Perot interferometer. The measuring diaphragm is shiftable by a distance (H) in response to a pressure difference (.delta.p) exerted on inner and outer surfaces of the measuring diaphragm whereby the optical length (L) of the Fabry-Perot interferometer changes as a function of the pressure difference (.delta.p).

Abstract: A heat circuit comprises an initial conduit containing a flow medium and a return conduit. A choke element located in a conduit such as the initial conduit of a heat circuit serves to control the flow of the flow medium. The choke element has several active positions in which openings having differently sized cross-sections are inserted into the path of flow. The choke element is moved by a drive so that a particular position of the choke is active. A differential pressure sensor measures the presure difference before and after the choke element. A computer resposive to the differential pressure sensor controls the drive so that a particular cross-section of the choke element takes effect and the flow of the medium is measured with sufficient precision over a wide measuring range. The inventive arrangement may also include a temperature sensor for measuring the temperature difference between the initial and return conduits.

Abstract: An arrangement for electrical measurement ascertains "subordinate" quantities, and is also "main" quantities with great accuracy and safety against falsification. An active energy to be measured is a main quantity, and a subordinate quantity is at least one of the following quantities: effective value of the voltage (u.sub.N) or of the current (i.sub.N), volt hours, volt square hours, ampere hours, ampere square hours, active power, reactive power, reactive energy, apparent output, apparent energy or power factor. The arrangement may comprise a voltage sensor (8), a voltage/current-converter (9), a multiplier (10), a current/voltage-converter (11), two analog/digital-converts (12 and 15), a signal/frequency-converter (13), a counter (14), an interface circuit (4), and an indicator (7), wherein the current/voltage-converter (11) consists of a constant current source (16) and a further multiplier (17).

Abstract: An accessory device for use in connection with a video terminal comprises an attachment mechanism for mounting a display board on either or both sides of a video terminal. The display boards are pivotable about both horizontal and vertical axes. The accessory includes a lighting fixture for illuminating the surface of each display board and a circuit for automatically adjusting the intensity of light produced by each ligthing fixture to maintain a constant predetermined level of illumination on the surface of each display board. The video accessory increases the vertical work surface available for use by a video terminal operator and results in a work station area which is more comfortable for the video operator.

Abstract: A device for measuring a magnetic induction comprises an evaluation device including a source for emitting light and a receiver for receiving light. A resonator is located in the light path between the source and the receiver and comprises first and second parallel mirrors and a gaseous medium occupying the space between the two mirrors. A converter is coupled to one of the mirrors for shifting one of said mirrors along an optical axis of the resonator so that the optical length of the resonator varies in response to the induction to be measured.

Abstract: Device for the measuring of the activity and the volume of radioactive liquids with a shielding housing with a first chamber containing a vessel provided with a central hollow space and a ring chamber receiving the electrically conductive liquid to be investigated and with a second chamber separated from the first chamber by a wall with a vertical row of windows placed one above the other and in which a vertical row of sensors assigned to the row of windows is provided, each of said sensors being connected to an amplifier and to a counting device, whereby two separate rod-shaped electrodes dip into the vessel contained in the first chamber, one of these electrodes dipping into the ring chamber and being subjected to high-frequency impulses, while the other electrode extends inside the central hollow space of the container and is connected via an amplifier to a measuring device.

Abstract: An apparatus for the fault-free receiving and issue of sheets has guide rollers which are arranged on a carriage and which engage into belts to alter the geometry of the belts when the carriage is displaced on a rail over a stack by means of a drive. In the receiving or issue operation the sheet to be stacked or a top sheet to be issued rolls, without sliding, around one of the outer guide rollers, on the stack. Disposed between the outer guide rollers on a roller shaft are rotatable suction rollers whose suction cap sucks up the top sheet by means of reduced pressure at the beginnning of an issue cycle. A control arrangement is adapted to trigger off apparatus receiving and issue cycles and establishes predetermined positions of the carriage on the rail.

Abstract: An improved temperature stable synthetic polycrystalline diamond (PCD) product includes at least one temperature stable PCD integrally and chemically bonded to a matrix carrier support through a carbide forming layer which is of a thickness of at least about 1 micron, the layer on at least one surface of the PCD is in turn is bonded to the matrix carrier. A wide variety of shapes, sizes and configurations of such products is achieved through relatively low temperature and relatively low pressure processing. Various products of various geometries are described as well as the details of the processing to achieve chemical bonding of the PCD elements in a variety of support matrix carrier materials to form a unitary structure having a temperature stability up to about 1,200 degrees C.

Abstract: A device for embossing a set of motifs having a predetermined motif interval onto a length of film utilizes a rotating embossing cylinder which is provided with a recess for the attachment of an embossing matrix. The embossing matrix has a usable length which is less than the entire circumference of the embossing cylinder but more than 50% of the circumference of the embossing cylinder. A rotating counterpressure cylinder is positioned adjacent the embossing cylinder, such that the film advances between the counterpressure cylinder and the embossing cylinder for embossing said motifs from said embossing matrix onto the film and for defining a free phase during each rotation of the embossing cylinder when the recess is positioned adjacent the film. The device also comprises movement means for providing an additional relative movement between the length of film and the embossing matrix during each free phase of the embossing cylinder.

Abstract: The invention relates to a filling valve on a filling and closing machine with a filling container 1 for free-flowing products, in particular foodstuffs with lumpy ingredients. In order to prevent subsequent dripping or the formation of threads during the portioned drawing off of the free-flowing products, the filling valve has, in a mouthpiece, an axially movable valve slide 9 which, in the closed portion, can be set in vibration in the axial direction. The stroke of the vibration is dimensioned in such a manner that the closing function of the valve tappet 9 is maintained.

Abstract: A credit document with improved protection against forgery comprises a film which is attached to a local portion of a surface of the credit document. The film includes at least one security mark. The security mark comprises a micro-relief structure for optically diffracting incident light. A protection profile in the form of a macro-relief structure is also embossed into the surface of the credit document. The security mark and the protection profile overlap in part. The relief lines of the protection profile macrostructure are bent away from the plane of the surface of the credit document sufficiently to provide visible gloss effects due to the reflection of incident light. When this arrangement is utilized one or more visible breaks in the security mark occur when the security mark is removed from the credit document. In addition, the security mark is so deformed by the protection profile, that the deformation is easily visible if the security mark is attached to a second (i.e. a forged) credit document.

Abstract: A contact pressure parting device for applying a continuously moving metal strip (1) to a winding reel (2). The contact pressure device comprises a contact pressure element (7) which is disposed on the rear side of the strip (1) remote from the winding reel (2) by which the strip (1) can be forced on to the winding reel (2), which is provided with an adhesive (3). The contact pressure and parting device also has a blade (8) which is disposed downstream of the contact pressure element (7), viewed in the direction of strip travel, and can be advanced against the rear side of the strip (1) and which when its cutting edge (8a) impinges on the strip (1) parts the strip (1), the blade (8) then being swung away from the strip (1) and the winding reel (2). In its starting position the cutting edge (8a) of the blade (8) is disposed upstream, viewed in the direction of strip travel, of the place (P) on the strip (1) situated closest to the pivoting axis (12) of the blade (8).