Abstract: System constituted by a reading and/or writing apparatus and a removable sette for the latter, provided respectively with two couplable connector elements. The apparatus is equipped with a fixed guide member and a drive member mounted on a movable lever and both members are adapted to cooperate with a trough of the cassette to ensure rectilinear driving of the latter and correct cooperation of the two connector elements during the positioning or the extraction of the cassette.

Abstract: Writing device with heating elements for printing by thermal action on a ting support, mounted on a base and comprising a heating elements support bearing the heating elements and first electrical contacts connected directly to said heating elements, an intermediate support to support mechanically and removably the support, a connecting part provided with second electrical contacts adapted to cooperate with the first contacts of the support and attached respectively to the base. A fixing device fasten the support and the part to the base so as to permit, between the heating elements support and the base, the relative movements necessary for the progress of the writing process. A device for positioning of the heating elements support on the intermediate support, and locking device to make fast mechanically and removably the heating elements support to the intermediate support are also included.

Abstract: A gyroscopic navigational installation for land and sea vehicles for provng characteristics of the trajectory of the vehicle. The installation in one embodiment includes a gimbal mounted on the vehicle and pivotable about an axis. A first gyro is rotatably supported by the gimbal about a rotational axis such that a gyro azimuth sensitivity axis is orthogonal to the longitudinal axis of the vehicle and a gyro rolling sensitivity axis is parallel to the vehicle longitudinal axis. A controlled accelerometer is supported by the gimbal such that an accelerometer pitching sensitivity axis is parallel to the vehicle longitudinal axis and an accelerometer rolling sensitivity axis is parallel to the gyro rotational axis. In an installation according to another embodiment, a second gyro is mounted on the gimbal such that a pitching sensitivity axis thereof is parallel to the rotational axis of the first gyro.

Abstract: Gyrocompass for sea vehicle comprising a pendular mechanism (2) with two dans, namely a rolling cardan (4) and a pitching cardan (5), a vertical fork (7) free to cooperate with said pendular mechanism (2), a site cardan (9) carried by said fork (7), a gyroscope with two degrees of freedom (11) carried by said site cardan (9), so that one of the two sensitivity axes (G.sub.z) is vertical, the other sensitivity axis (G.sub.y) being parallel to the axis of the site cardan (9), and its rotation axis (S) is horizontal, a horizontality sensor (12) carried by said site cardan, so that its sensitivity axis (P) is parallel to the rotation axis (S) of the gyroscope (11).

Abstract: The invention relates to a sequential pneumatic control device, supplied with electric energy, for a total cardiac prosthesis (4) formed by a biventricular monobloc assembly with pneumatic operation, this device being contained in at least one sealed case (10) implantable in the human body; this device comprises an enclosure forming a drive fluid reserve defined by a wall at least partially flexible (12) subjected to the internal pressure of the human body, whereby the initial pressure of the drive fluid is made permanently dependent on said internal pressure of the body, which serves as a reference pressure.

Abstract: The invention relates to a periscope installation sighting head, particuly for a submarine, located at the upper end of a periscope mast and including at least one optical sighting unit off-set laterally with respect to the axis of the mast. To stabilize, in azimuth and in elevation, the image provided by the sighting unit when the mast is animated by a swinging movement, the sighting unit is positioned on a mobile support with two gyrostabilized axles and a trajectory correction device as a parallel-sided plate is interposed in the path of the signals delivered by said unit and is slaved to the azimuth of the unit so that the signals are transmitted to the mast substantially along the optical axis of the latter.

Abstract: A periscopic installation with multi sighting heads for submarines comprig: two mobile masts (1,2) carrying sighting heads (3;4) and permanently situated outside the hull (7) of the submarine whatever their position (raised or lowered); a sealing protecting structure (8) surrounding the masts; two through means (11,12) passing sealingly through the hull (7) and adapted to provide through the hull, transmission of the signals supplied by the sighting heads; two means (13,14) for receiving said signals situated inside the hull and connected respectively to the through means; a single observation post (10) situated inside the hull for observing the signals at (18); and switching means (16) inserted between the observation post and the receiving means and adapted to selectively connect the observation post with one of the receiving means.

Abstract: A magnetic bubble memory device comprises a common package accommodating a lurality of pairs of memory chips. In each pair, the two chips have bubble propagation patterns in confronting relation which are mirror images of each other and additionally angularly offset by 180. Electrical connecting leads between the chips and the outside of the package are carried by insulating films located between the confronting chips. Coils located in the package create a bias magnetic field which is common to all chips. The coils for driving bubbles along the patterns are also common to all chips.

Abstract: A pendulous accelerometer comprises a stator defining a cavity having two nfronting surfaces which constitute two electrodes.It also comprises a pendulum consisting of a disc connected to the stator by a hinge. A servo-circuit applies DC forces to the capacitors, each comprising a surface of the cavity and the confronting electrically conductor surface of the pendulum for creating an electrostatic torque which balances the acceleration torque.

Abstract: An apparatus for measuring a dimension of a workpiece, for instance a worece being machined on a lathe, comprises a unit which may be moved toward and away from the workpiece. That unit includes a forked carriage one of the prongs of the fork having a light source which directs a parallel light beam perpendicularly to the direction of movement of the carriage toward the other prong. Light sensitive means on the other prong deliver a first signal when the light beam is interrupted by the workpiece upon movement of the unit and a second signal when the light beam is re-established.

Abstract: A machine for measuring the dimensions of a workpiece, comprising a base te for receiving the workpiece and a mechanical structure carrying a feeler for movement along three orthogonal axes at right angles by means providing for direct measuring of the amounts of movement of the feeler along the axes. Optical deviation measurement means determine the errors due to deformation of the components, lost motion as well as pitch, yaw and/or roll of the movable components. The corrections to be applied to the data delivered by the measuring means are computed and may be made automatically for the display to be free of errors.

Abstract: The invention relates to devices for measuring the azimuth and the slope of drilling line. These devices comprise, in a container 1, a gyroscope 5 having two principal axes of sensitivity X--X and Y--Y and an accelerometer 12 having two principal axes of sensitivity parallel to those of the gyroscope 5; this gyroscope 5 is connected to a circuit to determine the component of the Earth's rotation vector along the axis of the drilling line.

Abstract: An apparatus for the treatment of at least one surface of an article conted therein is disclosed. The treatment apparatus comprises a treatment enclosure which includes at least one inlet lock-chamber and at least one outlet lock-chamber with an article transport device extending therebetween. The treatment enclosure includes a solvent dispenser which is positioned with an outlet thereof adjacent the article transport device. Included within the apparatus is a vapor extractor for extracting air-solvent vapors from the treatment enclosure. The vapors extracted from the treatment enclosure are directed through a condenser positioned between the inlet lock-chamber and the outlet lock-chamber. Recycling ducts, communicating with the treatment enclosure and the vapor extractor, are also provided for recycling air, from which the solvent vapors have been substantially removed, toward the inlet of the inlet lock-chamber and the outlet of the outlet lock-chamber.

Abstract: A device for continuously measuring the azimuth and slope of a drilling l includes a gyroscope and an accelerometer station disposed in a container suspended from a cable. The gyroscope and the accelerometer station are mounted on an inner frame pivotally mounted on an outer frame on an axis which is perpendicular both to the axis of rotation of the gyroscope and the axis of the drilling line. The outer frame is pivotally mounted in the container on the longitudinal axis of the container. An angular position detector measures the angular movements of the inner frame in relation to the outer frame. A first motor controlled by stabilization error information delivered by the gyroscope and corresponding to one axis of gyroscope sensitivity rotates the inner frame in relation to the outer frame, and a second motor controlled by stabilization error information delivered by the gyroscope and corresponding to a second axis of sensitivity rotates the outer frame in relation to the container.

Abstract: A numerically controlled stitching machine tool comprises a head and a ta movable in relation to each other along two coordinate axes. The head is provided with a stitching needle and an optical follower placed in an invariable position in relation to the needle and receives the image of a drawing of the pattern when the drawing is placed on the table. The machine comprises, for each coordinate axis, a motor for moving the head and the table in relation to each other along that axis, transducer means for supplying an electrical signal whose amplitude depends on the movement along this axis, for A/D conversion and non-volatile storage, means for controlling the motor from the stored signals bringing into action said transducer and conversion means.

Abstract: A device for reading out the position of a movable member comprising a sc carried by that member and having equidistant coded references. Each reference is different from the others. A stationary optical system forms the image of a portion of the scale on a fixed detector. The detector comprises a linear matrix of photo detectors regularly distributed at predetermined intervals and associated with electronic means which identifies the coded reference whose image is formed on the matrix and reads out the serial number of the photo element on which the leading edge of the coded reference is formed.

Abstract: The invention concerns a printing device or head for a printer or the like nd to a process of making same. The device comprises a plurality of needles each having an electro-magnet and a metal plate associated therewith, a selected needle being displaceable against an information support upon energization of the associated electro-magnet. The electro-magnets are supported in a base. In accordance with the invention each electro-magnet includes a U-shaped magnetic circuit, the base including housings for magnetic circuits. A surrounding, insulating material is disposed between the arms of the magnetic circuit and around the windings of the electro-magnets.