Abstract: The transfer modulation measuring system is made up of an adjustable multifrequency generator, a laser emission circuit, an optical detector and a spectrum analyzer. The generator includes oscillators at predetermined frequencies belonging to a discrete frequency distribution. Component signals at selected predetermined frequencies may be time-division multiplexed or frequency-division multiplexed into an electrical composite signal which modulates the laser emission. The system comprises also two optical fiber connectors and a so-called priming optical fiber which excits uniformly the propagation modes at the entrance end of the optical fiber to be measured. During a calibration phase, the connectors are joined end-to-end and aligned optically. The spectral lines at predetermined frequencies are successively adjusted to a same predetermined level on the screen of the spectrum analyzer by means of potentiometers adjusting the amplitudes of the component signals.

Abstract: Apparatus for detecting whether a measured dimension deviates from a nominal value by a predetermined increment. It comprises a feeler for following the surface of a component and a variable area window controlled by said feeler. Two pairs of photoelectric receivers are located behind the window and the photoelectric receivers of each pair receive differential illumination through the window.

Abstract: Multiplex time division switching network unit comprising a plurality of P groups of N incoming and outgoing multiplex highways and P incoming and outgoing supermultiplex highways each formed of N multiplex highways and having 2aN time slots where a is the number of time slots in a multiplex highway. The supermultiplex highways are multiplexed two by two and with themselves to form double supermultiplex highways each having 2aN time slots. It results that there exists a double supermultiplex highway simultaneously containing any time slot assigned to a calling party and any time slot assigned to a called party whatever be these time slots. The buffer stores of the switching network unit can thus be rendered bidirectional and their number is P(P+1)/2 instead of P.sup.2 in the prior art.

Abstract: Apparatus for measuring a resistor in function of the amplitude of a direct current or the frequency and the amplitude of an alternating current. When the direct current equipment of this apparatus is used, the direct current signal flowing through the resistor is generated from an adjustable direct current generator and produces between terminals of the resistor a direct voltage signal which is chopped and amplified into a recurrent rectangular signal having a predetermined frequency and an amplitude proportional to the resistance value of resistor and included within a predetermined measurement interval. When the alternating current equipment of this apparatus is used, a first alternating current signal flowing through the resistor is generated from an adjustable frequency generator, an adjustable amplitude attenuator and a voltage-to-current converter.

Abstract: An arrangement for traffic analysing for public telephone stations which are served from a telephone exchange. The exchange transmits charging pulses to the telephone stations through telephone subscriber's lines, when calls are requested from the telephone stations. A charging pulse counter is accessed through a charging pulse detector when a call is made. The counter counts the number of detected charging pulses during an observation period allocated to the calling telephone station. An analysis initializing circuit includes time recording data delivering means for periodically reading-out the charging pulse number in the counter and for resetting the counter after the observation period. A traffic analyzing circuit is connected selectively to charging pulse counters and compares the charging pulse number of each counter to at least two predetermined charging pulse number values specific to the telephone station at the end of each observation period allocated to the telephone station.

Abstract: A variable-reluctance electric motor with teeth of uniform pitch and poles whose number is a multiple of 4, which includes means for varying the magnetic permeability of the poles in dependance upon the relative positions of the poles and teeth from a zero value to saturation value reached when a tooth faces the middle portion of a pole, passing through intermediate values when a tooth faces the edge portions of a pole. In a first embodiment, the poles are made up of a mixture of magnetic and non-magnetic material, the ratio of magnetic material to non-magnetic material decreasing from the middle portion of the pole to the edge portions. In a second embodiment, the poles are distributed in sectors each containing a central pole and two equal numbers of lateral poles. In a sector, the pitch of the poles is non-uniform, the pitch of the lateral poles being slightly less than the pitch of the teeth.

Abstract: A bit-by-bit time-division digital switching network switches a plurality of incoming and outgoing isochronous digital data channels having rates which are different but sub-multiples of a given low rate. After phasing said incoming digital channels, bits having a predetermined binary state are detected. Previously stored address words of said outgoing digital channels to be switched to said incoming digital channels are read-out and correspond to switched incoming channels whose detected bits have said predetermined binary state. Then the read outgoing channel address words are multiplexed into a multiplex digital highway at high rate. In the transmission part of each outgoing digital channel address words of said outgoing digital channel are detected. A bit at said predetermined binary state or a bit in the other binary state is transmitted on the outgoing digital channel in response to the detection or failure of detect the address word of said outgoing digital channel.

Abstract: A calibrating unit for pipe sections is provided with calibrating jaw means and brake means, the jaw means measuring the inside and outside diameter of the pipe which is used in combination with feed rolls and tilting tables which move the pipe sections into the calibrating unit. The feed rolls are synchronized with the brake means and are swivelably connected in the vertical plane onto the tilting tables with the calibrating jaw means located on both sides of the horizontal plane of said tables through which the pipe sections are moved by the feed rolls and in which horizontal plane these pipe sections are aligned by said calibrating jaw means.

Abstract: Optical fibre coupler comprising at least three branches of the optical fibre type. A three-branch coupler comprises first and second optical fibres having two end frustoconical portions which are fastened to one another. The two frustoconical portions are terminated by a first common spheroidal end centered on their common generatrix and having a diameter substantially greater than the sum of the core diameters of their small end bases. The third branch of the three-branch coupler is constituted by a third optical fibre whose end lies opposite the first spheroidal end. In the case of a four-branch coupler, the fourth branch is constituted by a fourth optical fibre. The ends of the third and fourth optical fibres are formed as two frustoconical portions which are fastened to one another and terminated by a second common spheroidal end analogous to the first spheroidal end. The first and second spheroidal ends lie opposite each other.

Abstract: Magnetostrictive rod filter whose attenuation versus frequency curve has a resonance as the conventional magnetostrictive rod filters but also a pole at a frequency near the resonance frequency. The filter comprises a freely vibrating magnetostrictive rod, two windings symmetrically located with respect to the rod center and surrounding the rod, ferrimagnetic material sheaths surrounding the windings except on the parts thereof facing the rod and means for applying a d.c. magnetic field to the rod. The pole of the attenuation curve is due to a demagnetizing field created by portions of the rod externally projecting beyond the windings and by apertures in those parts of the sheaths facing these rod projecting portions.

Abstract: A screw fastened clamping neck attachment for an electrical hand operated drill. The electrical motor of the drill is of the neckless type and has a short rotary shaft extending from the housing. The screw fastened clamping attachment is in the form of two semi-cylindrical bushings adapted to be clamped together at their base portion to form a neck, these bushings, in clamped condition, encasing an extension shaft therebetween which is to be connected to the short shaft of the electrical motor. Preferably the extension shaft has a connecting sleeve end threaded internally with the short shaft threaded externally to provide a threaded connection. Bearings are provided for the extension shaft of the attachment within the semi-cylindrical bushings. Fastening arms extend rearwardly from the bushings to support the attachment on the housing and to resist torsion.

Abstract: A battery operated portable thawing device for frozen locks has an electrically heated thawing stick sized for insertion into the key hole of a frozen lock. The stick is thinner than the lock key and comprises a hollow metal body inside which is located a thin resistance heating wire. The resistance wire is located between the middle and the end of the stick inserted into the keyhole in a relatively short length (20-30%) of the thawing stick. For use, the stick is slidable out of a protective housing adapted to be gripped in the hand. The housing carries a battery for energizing the stick and a light bulb for illuminating the keyhole. The metal body of the stick serves as one terminal for supplying current to the resistance wire. The circuit between the battery and resistance wire made automatically made when the stick is moved out of the housing for use and broken when the stick is returned into the housing.

Abstract: A rotary internal combustion engine fitted with ignition means for the fuel air mixture delivered to the cylinders comprising a rotor having an output rotor shaft, a housing forming the outer shell of the engine which is fitted with intake and exhaust openings for fuel and exhaust gases, the openings located in the outer periphery of the housing wherein the rotor housing comprises a rotatable support for the motor shaft and includes an irregularly shaped cavity which surrounds the periphery of the rotor. A plurality of radially disposed vanes are mounted in the rotor for radial reciprocating movement relative to the axis of rotation of the rotor. Novel interconnecting cam means are provided between the outer shell of the housing and the vanes to initially actuate the vanes radially outwardly upon rotation of the rotor to positively position and maintain the outer ends of the vanes in close operative proximity to the inner peripheral surface of the irregularly shaped cavity.

Abstract: A multipoint communication digital transmission system in which the main data transceiver of each multipoint communication can communicate simultaneously with a plurality of secondary transceivers and they can each, in turn, communicate with the main data transceiver. First, second and third multiplexer means are provided, each at its own characteristic sampling rate. Selective switching is provided. Corresponding first, second and third multiplexing means are also provided.

Abstract: A carrier conveyor comprising a main runway and a secondary runway each including a chain to which are secured stationary lugs for continuously driving carriers on a runway. A first auxiliary way includes a chain which is arranged to be moved in synchronism with the main chain and has lugs for driving carriers from a waiting position of the secondary way to the main way. Each retractable lug is returned by a spring to an engaged position for driving a carrier. A second auxiliary runway includes a chain which is arranged to be moved in synchronism with the main chain and has lugs for driving carriers from the main way to a stop position of the second auxiliary runway upstream of the secondary runway. A first electromechanical transfer device transfers a carrier from the waiting position onto the first auxiliary runway by an engaged lug of the first auxiliary chain. Movable means disengages selectively the retractable lugs of the first auxiliary chain from the carrier path when no carrier is to be transferred.

Abstract: Method of manufacturing thin film electroluminescent devices composed of a compound of zinc and sulphur, activated by a first metal activator consisting of copper and activated by a second metal consisting of copper manganese, excitable by direct and pulsed voltage.

Abstract: Apparatus for conveying goods in vertical direction, such as a stacker crane or elevator, with a lifting unit and an emergency braking system which influences the lifting unit as soon as a preselectable speed is exceeded. The braking system comprises two wedges connected to an endless rope drive moving synchronously with the lifting unit. The rope drive moves only up to a preselectable top speed, and as soon as a speed difference between rope drive and lifting unit occurs, the brake wedges are activated and decelerate the lifting unit progressively until it stops.

Abstract: Automatic power shearing apparatus and method for trimming sheet material into finished blanks comprising blade means, x and y axis feeding means and sheet feeding means including a first power driven means for moving the sheet in x and y directions and a second means responsive to a control acting to move the sheet in preselected directions by a constant counter balance against the first power driven means.

Abstract: Generator and power amplifier of plasma confining, electromagnetic, light or infrared wave beam. It comprises a generator of a rectilinear polarized wave beam and a solid state laser beam amplifier amplifying the rectilinear polarized wave beam after conversion of the same and having a doped active material in the shape of an annular sleeve member. This amplifier operates in the TM.sub.o annular mode. It is preceded and followed by mode converters. The first mode converter before the amplifier converts the rectilinear polarized wave beam to a TM.sub.o mode wave beam and the second mode converter after the amplifier converts the amplified TM.sub.o wave beam to a negatively azimuthally phase shifted, circular polarized wave beam.

Abstract: A method of installing a sleeve within an vortex finder of a cyclone separator to adjust the diameter of the vortex setting. To facilitate installation of the sleeve, the dish-shaped bottom of the cyclone is mounted on a plate which can be lowered and then pivoted aside. The sleeve is provided with a collar which is stitch welded to the bottom of the vortex finder to retain the sleeve in place. Alternatively, the collar and vortex finder are provided with a bayonet joint to releasably retain the sleeve. A kit of sleeve assemblies of different diameters is provided to accomodate the adjustment of the vortex setting.