Abstract: The display screen (11) is made of pixels (P) connected to one edge (11a) of the screen by wires (12) separated by a given pitch (s) so as to be controlled by respective terminals (18) of integrated circuits (16) outside the screen. The terminals (18) of each integrated circuit are disposed in a plurality of parallel rows (19) in which they are separated from one another by a pitch (Sm) equal to several times the pitch of the wires. Each integrated circuit is mounted on a connecting support (10) formed by an insulating film (21) carrying conductive tracks (23) connecting the terminals of the integrated circuit to the corresponding wires of the screen, the tracks extending substantially at the pitch of the wires. The mounting is done simply by collective reflow of bumps between the tracks (23) and the terminals (18), and the support (10) makes it possible to test the integrated circuits before they are mounted on the screen.

Abstract: A sealed shaft bearing assembly employs a lubricant seal having a rigid seal case supporting a resilient dust seal in rubbing contact with a cylindrical surface on the shaft, and a labyrinth type primary seal between the dust seal and the interior of the seal case, with the labyrinth being defined by a stator mounted on the seal case and a rotor mounted for rotation with the shaft, and with the stator including a cylindrical tubular portion defining an elongated thin annular gap with the shaft cylindrical surface and the rotor defining an elongated thin annular gap with the outer surface of the rotor. The radial thickness and axial lengths of the thin annular gaps are such as to preclude the passage of grease type lubricant therethrough upon operation of the bearing.

Abstract: The present invention relates to a process for manipulating data models for the transfer of models between a plurality of software engineering tools (Ta, Tb, Tc, Td, etc.) and for the application of transformation rules to a model, wherein the transformation of data models is carried out by means of gateways (Ba, Bb, Bc, Bd, etc.) which make it possible to convert the format of one tool to the format of another tool by passing through a unique neutral intermediate format (NIM). The present process is remarkable in that the development of the gateways, in accordance with the so-called object-oriented approach, is carried out in an executed language, the gateways being executables which allow the transformation of a data model in several steps activated successively, in a systematic or conditional way, by means of a command language which describes a logic for dynamic concatenation of the steps, concatenation being a named, parameterized procedure.

Abstract: A mixing device for mixing flowable materials in a container employs an elongated shaft having one end adapted to be connected to a power source and the other to be inserted into the material, with a pair of elongated, generally helical open centered coil impellers mounted on the shaft at a location to be submerged in the material, with the coils having their longitudinal axes parallel to one another and substantially perpendicular to the shaft, with the coils being offset on opposite sides of the shaft. Preferably, the coil impellers are supported on a hub mounted for adjustment longitudinally of the shaft.

Abstract: A coupler for managing communication between a portable data medium and a data exchange device. The coupler includes bistable control circuitry (25) input-activated by at least two control signals (DTR, RTS) delivered by the data exchange device in one of two first and second predetermined input sequences, and arranged to output at least one power supply signal (VCC) and a data medium reset signal (RST) in a predetermined output sequence, such that the portable data medium is activated only when one specific input sequence of the two input sequences is received.

Abstract: A liquid-absorbing, rot-, chemical-, and skid-resistant mat fastened to an inner folding frame held in place within the area of use by an outer frame adapted to be secured to any surrounding wall. The inner frame is foldable and includes attachments by which the frame and mat, after being folded over itself, can be removed from the area of use by an overhead cabling or on a specially fitted wheeled trolley.

Abstract: A novel asymmetrical cryptographic schema which can be used for enciphering, signature and authentication. The schema is based on low degree public polynomial equations with value in a finite ring K.The mechanism is not necessarily bijective. The secret key makes it possible to hide polynomial equations with value in extensions of the ring K. The solving of these equations makes it possible, if one has the secret key, to execute operations which are not executable with the public key alone.

Abstract: The invention relates to a static analyzer of the risks of blocking the operation of a system. The analyzer produces lists of lock applications associated with allocations of the resources of the system which conform to Coffman conditions. The analyzer also produces the names of the source programs from which the lists are extracted. This allows the constructor of the system to modify his source programs in order to eliminate the risks of deadlocking between different processes in the system. The constructor of the system will thus be assured that no allocation of resources will have a blocking effect, no matter what the synchronizations of the various processes being executed in the system may be.

Abstract: The invention relates to a method and an apparatus for producing a key that is common to two devices that belong to different sets and are intended to implement a common cryptographic procedure. Each device is assigned a mother key (KC, KP) and a daughter key (KP.sub.ck, KC.sub.pi). The daughter key is developed on the basis of the mother key of the other device and of an identification datum specific to the device. When the procedure is performed, the two devices exchange their identification datum (ck, pi), which when processed with the aid of the mother key held by the device will yield the daughter key (KC.sub.pi, KP.sub.ck) of the other device. The pair of keys formed by the daughter key already held and by the daughter key that is calculated constitutes the common key.

Abstract: An improved fluid control valve assembly employing a needle valve integrally formed on a non-rotating valve stem includes a metering orifice for engaging and forming a fluid seal with the valve needle, and a generally radially extending end face on the valve stem for engaging an opposing wall surface acting to positively stop the valve stem upon fully closing the valve and forming a seal between the metering orifice and valve needle to thereby avoid excessive loads and wear between the metering orifice and valve needle.

Abstract: Disclosed is a gamma camera having a base movable on a frame and at least one arm that is movable with respect to said frame and is provided, at one free end, with a plane detector. This camera further comprises two approach planes that are substantially parallel to the plane of said detector so as to servo-control the position of one edge of the patient between these two planes. The invention can be applied especially to gamma cameras that comprise two detectors and are capable of carrying out tomography and full-body examinations.

Abstract: An integrated circuit (IC) includes a device (10) that adapts the impedance to the characteristic impedance (Zc) of transmission lines (13) each connecting a transmitter (11) to a receiver (12). Two adaptation blocks (14, 15) reproduce the respective structures of the transmitters (11) and receivers (12) and their impedance is adapted by a reference resistor (Rr). A closed loop control device (Len, Lep, Lrn, Lrp) reproduces the adaptation conditions in the transmitters (11) and receivers (12) respectively.

Abstract: Data input/output device for the display of information which is monolithically integrated in an application specific integrated circuit (ASIC). The device is principally constituted by a single memory which is divided into specific zones for the programs, the screen and the character generator. Access to the various specific zones is authorized by a single-memory bus line MB and is administered in accordance with a sequencing method provided by a microprogrammed sequencer programmed for flow regulation. Various devices can be added to the ASIC to make it possible to fully utilize the pass band of the memory, such as cache memory (CM), a FIFO register (FR), and line buffer registers (RB).

Abstract: A bearing assembly employs an improved seal wear ring comprising a rigid metal sleeve having an internal diameter greater than that of the shaft to provide a clearance therebetween along the full length of the wear ring. An annular spacer ring of a dense, dimensionally stable synthetic resin material such as polyvinylchloride is fitted within an annular recess on the inner surface of the metallic sleeve, with the spacer ring having an internal diameter slightly less than the external diameter of the shaft to provide an interference fit therebetween when the bearing assembly is pressed onto the shaft.