Abstract: A laser comprising a laser cavity (13) having reflectors at each end of an optical path, a first layer of gain material (15) and a second layer of a second material (14, 16) disposed along the optical path, wherein the first and second layer are directly optically contacted to one another at associated faces. Also, a laser comprising a laser cavity having a layer of gain material (15), and second and third crystals (14,16) having anisotropic refractive indices disposed along an optical path, the laser being oscillatory in a preferred mode having a particular orientation of polarization, the second crystal (16) being oriented with respect to the path to cause no appreciable net depolarisation of the preferred mode, and the third crystal (14) being arranged such that the preferred mode is transmittable therethrough with minimal refraction.

Abstract: A circumcision clamp comprising a clamping ring (5) displaceably mounted on a tubular support (9) having a flared end section (12) for internal reception of the glans penis and external envelopment by the prepuce. The clamping ring is movable between an open position defining a prepuce-receiving gap and a closed position in which the gap is closed, and locking means (13, 18) for locking the clamping ring (5) in the closed position.

Abstract: Hull for a high speed boat, comprising a V-shaped hull bottom and channels extending in the longitudinal direction of the hull, arranged below the waterline of the hull and adapted for ballasting with water, comprising two channels (1, 2) being arranged near the hull bottom, as structural parts of the hull below the waterline of the hull, symmetrically to the centre axis of the boat, the front portions of the channels (1, 2) being connected with air apertures (4) arranged above the waterline, the channels (1, 2) comprising substantially open outlets (3) below the waterline in the stern of the boat, such that the channels are completely or partly filled with water when the boat is stationary or moved slowly, however, filled with air when the hull planes.

Abstract: Aqueous compositions for use as drilling fluids or as workover fluids/completion fluids comprise calcium chloride and calcium nitrate. The compositions have a density of at least 1.35 g cm.sup.-3 and the weight ratio of calcium chloride to calcium nitrate is 5:95 to 95:5. The compositions may be formulated so as to have low crystallisation temperatures. Additional densifying agents such as calcium bromide and/or zinc bromide may also be included.

Abstract: An umbrella having a simplified construction which dispenses with the stretcher members of conventional umbrellas and has one end hinged to the central portion of each rib. Said umbrella includes a runner (4) axially slidable along the umbrella pole (1) between a folded position in which the ribs (3, 3') can be folded against the pole, and an unfurled position in which the runner engages the ribs and holds them in the extended position. For this purpose, the runner comprises an upper frusto-conical portion (46) engageable with the ends (35) of the reinforcing portions (31) of the ribs.

Abstract: The coffin is made by folding, along preformed lines, a single piece part (10) cut from a plate of corrugated cardboard of which at least one of the faces is covered with a cellulose coating which is tinted and decorated so as to give said face a wooden aspect. First the bottom of the coffin is formed by applying to each other two portions (1', 2') of different panels (1, 2) of the part (10) and by fixing said portions (1', 2') to each other by means of fixing tabs (3", 4") inserted into the slots (26a, 26b).

Abstract: The present reusable packaging box having the shape of a rectangular parallelepiped includes four lateral walls (1, 2, 3, 4) joined together in such a manner that the lateral periphery of the box is closed, as well as two cover parts (5, 6) and bottom parts (7, 8), all substantially rectangular, forming each one an edge with a respective lateral wall and having a free border parallel to this edge. The free borders (5a, 6a) of the two cover and bottom parts include each one a profile of which the cross-section and the construction are such that these free borders can be joined together by the mutual engagement of these profiles.

Abstract: A projector mounting and alignment device having a support frame, a base member longitudinally slidable relative to the support frame between a retracted and an axtended position. A connector is provided for connecting the base member to the support frame in the retracted position. A pivot plate is pivotally mounted to the base member. A projector mounting plate is hingedly connected to the pivot plate by a hinge member. The projector mounting plate is also pivotally connected to the hinge member. A pivot plate adjuster acts between the base member and the pivot plate to position the pivot plate relative to the base member. A projector mounting plate adjuster acts between the pivot plate and the projector mounting plate to position the projector mounting plate relative to the base plate.

Abstract: A medical signal analyzer comprises a sensing device (1) including at least one sensor for monitoring at least one parameter derived from a physiological measurement taken from a patient under observation, a data collection device (2), coupled to the sensing device for receiving and sampling an output signal of the sensing device and generating digital signals representative of the parameter over a predetermined time interval, a data analysis means (4) comprising means operable to recognize in the digital signals received over a signal link from the data collection device a plurality of predetermined information features, and means for classifying at least one of the said features, to produce first output signals representative of the existence of such features and representative of feature classifications, signal storage means (6) arranged to receive and store the said first output signal as a short term knowledge base, database storage means for storing reference data as a long term knowledge base (10), an

Abstract: A method of and an apparatus for applying hard material to cutting tool teeth (12), especially the teeth of saw blades (10). Due to its surface tension, the molten material (56) forms a spherical segment (58) in a mold cavity (40) which is defined around a tooth (12). The molten material (56) is cooled in the mold cavity (40) and subsequently heated again until it reaches a state which is at least approximately liquid. Only then is pressure, progressing in the direction towards the tip (18) of the tooth, applied to the spherical segment (58), whereby the latter is flattened. Hereby the precision in shape and durability of the teeth (12) is improved which are made of hard material (56), first molten and subsequently solidified.

Abstract: A sensor of the type comprising a magnetic circuit coupled to the lead, wherein circulates the current to be measured and presenting an airgap wherein is arranged a Hall cell (3) and coupled to a compensation coil (5) supplied, as well as the Hall cell, by a unipolar current source (V.sub.+, earth), comprises a four-branch bridge supply circuit wherein the coil (5) is connected to form a diagonal. The current source and a measurement resistor (R) are mounted in series with said bridge circuit. The variable conduction elements (8, 9, 15, 16) are mounted in the four branches of the bridge and are so controlled as to cause a make-up current to circulate in the coil (5), in one direction or the other, as a function of the residual flow direction indicated by the Hall cell (3), through two respective opposite branches of the bridge circuit. The other two opposite branches being non-conductive.

Abstract: A compass comprising a signal receiver having an antenna unit that can be fixedly mounted on an object on which the compass is to be used, the antenna unit permitting information relating to the direction from which a signal is picked-up by it to be calculated. By communicating with satellites within the GPS satellite network and utilizing the information incorporated in signals transmitted by such satellites, together with the direction information referred to above, a processor permits the calculation of the direction of a heading marker relative to the direction north, thus using the above information for compass applications.

Abstract: The ring is composed of three arc of a circle-like portions which are hinged connected between them so as to allow their mutual pivoting movement in the plane of the ring. The first portion (1) extends on an arc of about 270.degree. and each one of the two other portions extend on an arc of about 45.degree., providing a full ring. Male locking member (9) and female locking member (10) allow to close the ring between the first portion (1) and the third portion (5). To open the ring, it is enough to push inwardly the hinged connection (7) between the second and third portions (4, 5) of the ring, against the resilient force exerted by the first portion (1). The closure of the ring takes place in engaging the male locking member (9) into the female member (10) and by displacing outwardly the hinged connection (7) also against the resilient force of the first portion (1). Once the ring is closed, it is no longer possible to cause its opening under the action of an outwardly directed force.