Abstract: A miniature antenna, in which a pair of square conductor plates disposed in parallel with a spacing sufficiently smaller than the wavelength used are fixed to each other to an insulating frame to form an antenna structure which is used also as a case. Feeding terminals are provided at a desired position on one side of each of the conductor plates. High-frequency-wise short-circuit elements are provided at a plurality of positions on other sides of the conductor plates. A gravity-direction sensor, which produces an output in accordance with the direction of gravity, is provided in the case. The plurality of short-circuit elements are selectively short-circuited by the output of the gravity-direction sensor so that the plane of polarization of the antenna is brought into agreement with the direction of gravity.

Abstract: The connection has two inserted tubes, one of which, the outer tube (6), is enlarged in order to form a casing (8) for housing two support pads (10) which are held tightly between the two tubes and a radial projection (12) of the inner tube. A gasket (14, 15) with a section in the shape of a recumbent V and which has a cylindrical flange for bearing against the inner tube and a convex flange for bearing against the outer tube, is mounted on each of the ends of the casing (8). The two gaskets face in opposite directions and are fitted onto the pads which hold them tightly. The convex flange (18) is preferably spherical only for a part of its length. This spherical part forms the surface for rubbing against the casing and enables a relative displacement of these two members with no risk of the tightness failing.

Abstract: Derivatives of cyclic guanidine are disclosed, which are represented by the following formula:A--S--Rwherein A is ##STR1## R.sub.1 represent a lower alkyl or substituted phenyl or unsubstituted phenyl group; R.sub.2 is a lower alkyl; R.sub.3 is H or a lower alkyl; R is lower alkyl, alkenyl, alkynyl, alkanoyl, alkenoyl, dialkylaminoalkyl, cyanoalkyl, alkoxycarbonylalkyl, carboxylalkenyl, alkoxycarbonyl, alkoxyalkylcarbonyl, dialkylaminocarbonyl, dialkylaminothiocarbonyl, phenoxyalkylcarbonyl, piperidinoalkyl, pyridine carbonyl, substituted or unsubstituted benzoyl, or substituted or unsubstituted benzyl group.The compounds of the present invention are useful as anti-ulcerative agents.

Abstract: A hydraulic shoe bolt wrench used to mount and remove shoe bolts which secure shoes to a track chain. The apparatus comprises a vertical cylinder stood upright on a frame moving on a work table, a main frame secured to a piston rod of the vertical cylinder, a wrench socket driving shaft vertically projected below the main frame, a low speed high torque motor and a reduction gear provided on the driving shaft. Pressure oil is supplied to the high speed low torque motor and high pressure oil is supplied to the low speed high torque motor. Switching of the high speed low torque motor to the low speed high torque motor is carried out by a pressure switch disposed in a low pressure hydraulic circuit.

Abstract: In an oscillator (1) comprising a parallel resonant circuit (4), which for fine-tuning the oscillator includes a variable capacitance which is variable in dependence upon a fine-tuning control signal and is constituted by the capacitance occurring in the collector circuit of a transistor. This transistor is a separate transistor (12) whose collector is capacitively coupled to the parallel resonant circuit and which is arranged in common base configuration for alternating current, while its operating point is chosen to be in its saturation range, the fine-tuning control signal being applied to the base-emitter path of this transistor and the transistor base-collector junction, which is in its pass region, being driven further into conduction by this signal within its control range on the one hand, and being driven from its pass region into its cut-off region on the other hand.

Abstract: A new series of benzofuran and benzothiophene derivatives are disclosed. These compounds have a structure which can be obtained by substituting the third position of 2-lower alkyl-benzofuran or 2-lower alkyl-benzothiophene with a substituted benzene derivative, itaconic acid derivative or a substituted phenoxymethyl tetrazole derivative. They are useful as diuretics without side effects of elevating serum uric acid levels and can be used in the treatment of hyperuricemia.

Abstract: A color dental kit and method of specifying and illustrating coloring of synthetic dental elements such as individual teeth, crowns and the like to be made synthetically by imaging the individual teeth or crowns on a sheet of paper divided into light and dark incisal color tones. The color is effected with color pencils having a soft lead of the colors corresponding to gingival and incisal natural color shades. Some of the color pencils have leads for coloring specific color characteristics such as flaws including decalcification. The color pencils are provided in the color dental kit including therewith paper sheets on which imaging of the individual synthetic teeth and crowns is effected and the images are manually colored with the pencils as desired. These colored images provide positive dentition communication between and among dentists, patients and dental laboratory technicians.

Abstract: A stackable chair has a leg frame on which a seat and back are mounted. The leg frame comprises two lengths of flat tubing of dumb-bell shaped cross section bent to provide contiguous parallel portions which extend centrally transversely of the seat, portions extending from the ends of the parallel portions toward corner regions of the seat and portions bent downwardly to form the legs which are substantially in a vertical fore-and-aft plane but incline forwardly and rearwardly. When the chairs are stacked the legs of dumb-bell cross section nest with one another. The seat has a width substantially equal to the overall width of the leg frame and has cut-out corner regions to accommodate legs of superposed chairs when stacked. Plastic gliders at the bottom of the legs have support portions extending up along the legs for supporting superposed stacked chairs.

Abstract: The described control signal generator for processing a video signal is characterized by an addressable memory (PR1) whose addresses are associated with equally long time intervals of a video picture. The binary coded amplitude is stored at an address of the memory (PR1), which amplitude is to be assumed by the control signal (SS) generated by the control signal generator in the associated time interval. A counting unit (Z) which is clocked by a counter clock pulse (T) successively generates the addresses corresponding to consecutive time intervals of a video picture and being applied to the address inputs of the addressable memory (PR1). The frequency of the counter clock pulse (T) is chosen to be such that all addresses associated with a video picture are traversed during the time length of a video picture.

Abstract: The invention relates to the synchronization of a frequency-controllable oscillator in a PLL circuit with a carrier. The adjustment of this oscillator to the carrier frequency can be dispensed with in that additionally a frequency discriminator is provided which initially tunes the oscillator in accordance with the frequency difference. The frequency discriminator compares each oscillator frequency with a stable reference frequency which is proximate to the desired frequency and tunes the oscillator until it is in the range of the reference frequency. Subsequently the frequency discriminator is blocked and the further synchronization is taken over by the phase discriminator in the PLL circuit.

Abstract: A portable radio receiver assembled in a case. In accordance with the present invention, the case is also employed as an antenna of the portable receiver. The case is composed of a pair of parallel-opposed square conductor plates interposed therebetween a space sufficiently smaller than the wavelengths of received waves of the portable radio receiver, a frame of insulating material interposed in the space. Feeding terminals of the portable radio receiver are provided at desired positions on one pair of opposed sides of the parallel-opposed square conductor plates. Each of short-circuit elements of high-frequency-wise is provided on other pair of opposed sides of the parallel-opposed square conductor plates so that the direction of the plane of polarization of the antenna can be changed by short-circuiting any one of the short-circuit elements.

Abstract: A semiconductor device comprising an integrated optical guide, which has at least one rectilinear part and one curved part, and comprising means for obtaining the confinement of the light in the guide in the curved part, which means include a groove provided along the edge of the guide in the region of the curve part, characterized in that these means also include a guide structure comprising a guiding layer and, overhanging the guiding layer, a ribbon in relief for determining the optical path followed by the light in the guiding layer, and in that these means moreover include a groove structure such that it has a constant depth, that its central part follows extactly the edge of the guiding ribbon in the curved part, that its ends are removing from the edge of this ribbon at the beginning and at the end of the curved part, that its bottom is disposed in the guiding layer at a level which does not reach the lower part of this guiding layer.

Abstract: A circuit forming an active RC filter for use as a band-stop filter in high and very-high frequency domains, having a second order transfer function, comprising a circuit that includes a building block for performing a filtering and amplifying function, and a building block S.sub.3 for performing the summation V.sub.S of the circuit output signal and the signal V.sub.E applied to the input E of the circuit, characterized in that the filter building block is formed by a series arrangement of two filter building blocks F.sub.1 and F.sub.2 each having a first order all-pass function, and in that the circuit also includes an amplifier building block A.sub.1 in a series arrangement with the filter building blocks F.sub.1, F.sub.2, inserted between the output of the latter building blocks and the output of the circuit, in that the input signal V.sub.E is applied on the other hand to the summation building block S.sub.3 through an amplifier A.sub.2, and in that the summation building block S.sub.

Abstract: In a waveguide oscillator, a Gunn diode or other negative-resistance oscillator device (2) has a resonant cap (3) for coupling to the waveguide (1), and a tuning varactor diode (11) is coupled by a probe (13) to the electromagnetic filed in the vicinity of the cap (3). In accordance with the invention, a mechanically simple, compact and cheap oscillator arrangement is obtained by integrating both the varactor diode (11) and the probe (13) in a circuit body (10) mounted in the waveguide (1), preferably in an area below the plane of the cap (3) so as to reduce perturbation of the filed. The probe is formed as a conductive track (13) on the circuit body (10), for example as a transmission line coupling to the electric field and preferably located at the front surface (18) of the body (10) or as a current loop extending on a side wall of the body (10) and coupling to the magnetic field.

Abstract: The barrel, which consists, inter alia, of a casing (10) defining a chamber (100), of a coverplate (20) with an orifice (21), of a hub (30) and of a spiral spring (40), comprises a device (50) for temporarily immobilizing the hub (30) in this chamber (100) which consists of male (51) and female (52) complementary elements which are intended to be engaged in each other and are carried by the base (11) of the casing and the hub (30), where these male elements (51) are fragile and are intended to break as a result of the action exerted upon the hub (30) through the orifice (21), once the spring has been tensioned.

Abstract: An optical modulating device is disclosed which has, on a substrate directly or via a lower cladding layer, an optical waveguide layer, an upper cladding layer of a refractive index smaller than that of the optical waveguide layer and a pair of electrodes for applying an electric field across the substrate and the upper cladding layer and in which the absorption coefficient for incident light of a fixed intensity incident to the optical waveguide layer is varied by the electric field applied across the pair of electrodes to perform the modulation of the light and the modulated light is emitted from a light emitting end face of the optical waveguide layer. In accordance with the present invention, a pn junction is formed in the upper cladding layer and at least one buffer layer of an energy gap smaller than that of the upper cladding layer but larger than that of the optical waveguide layer is interposed between the upper cladding layer and the optical waveguide layer.

Abstract: A metal halide high intensity discharge lamp having an arc tube assembly including a pair of discharge electrodes and a pair of starting electrodes. Each starting electrode is adjacent a respective discharge electrode. During starting, the lamp makes the glow discharge to arc discharge transition in a substantially shorter time than a lamp with a single starting electrode, and exhibits a substantially improved lumen maintenance.

Abstract: A microwave oven for heating food, in which power control is by pulsing a microwave source during a sequence of operation periods. The start moment of the microwave source is sensed during each operation period, and the switch on time of the microwave source during each operation period is calculated from the sensed start moment. Start moment related variations in supplied average power level are eliminated.

Abstract: The control method is associated with a frame information transfer in accordance with the so-called accordion principle in which information shifts are locally effected with an opening, a transporting and a closing phase. The opening phase involves an enlargement of sensor element areas in a column direction in which a shift is effected during the transporting phase. The closing phase involves a reduction in the column direction of the enlarged areas (IE, BE, SE) at the appointed locations.

Abstract: A graded facsimile image signal coding system is disclosed which is provided with means for distributing a multi-graded facsimile picture signal, represented by 2.sup.n gradation levels, into n bit planes corresponding to n digits; initial encoding means for detecting, from picture elements forming each bit plane, picture elements at intervals of .DELTA.X picture elements on every .DELTA.Y-th line and encoding the detected picture elements; and additional coding means for .[.further .]. coding each one of .[.said encoded.]. .Iadd.picture elements except said detected .Iaddend.picture elements with reference to encoded four picture elements positioned around said one picture element to be coded.