Abstract: An optical frequency multiplex carrier control system which permits high-accuracy, high-speed stabilization control of the frequency of an optical signal. Based on the fact that the time waveform of the output signal from scanning type Fabry-Perot which receives the output optical signal from an optical frequency multiplexer is composed of pulse signals corresponding to an optical frequency standard and spectrum multiplex carriers of the output optical signal, the time intervals between the pulse corresponding to the optical frequency standard and pulses corresponding to the spectra of a scanning signal and each multiplexed carrier are measured by a counter having a high-accuracy clock, and variations in the optical frequency scanning region of the scanning type Fabry-Perot and in each carrier frequency with respect to the optical frequency standard are detected by hardware, with high accuracy, as variations in the pulse intervals, thereby stabilizing the frequencies of the multiplexed optical carriers.

Abstract: A window constructed such that a window sash is slidable upwardly and downwardly along a side jamb of a window, and may be inclined relative to the side jamb. The window sash is hung by a counterbalance and held at a selected desired position. The counterbalance is provided with a coiled torsion spring which counter balances the window sash, and the torsion force of the torsion spring can be adjusted. Adjusting mechanism is provided with a rotatable adjusting shaft for adjusting the torsion force of the torsion spring, a braking member for applying braking force to the adjusting shaft to prevent the rotation of the adjusting shaft, and a cam face for urging the braking member against the adjusting shaft to brake it or release it.

Abstract: Safety assembly for a separable coupling device, particularly for a motor vehicle steering column having two coaxially arranged shaft sections whose end portions are offset with respect to their common geometric axis and which overlap. Each shaft section carries a plate. Each plate is connected to the other plate by separable link pins.

Abstract: Process for producing from a rubber mixture blanks for finished parts in the rubber industry is composed of an extruder having a cylinder and a screw rotatable in the cylinder to plasticize a rubber mixture fed into the cylinder, an extrusion head and a gear pump between the extruder and the extrusion head for producing extrusion pressure and forcing the mixture through the extrusion head at a predetermined rate per unit time to form a uniform strand of predetermined shape which is cut into uniform lengths.

Abstract: Rubber scrap is pulverized by feeding it into a gap between a parti-cylindrical recess in a block and a cylinder rotating in the recess. A plurality of blocks are mounted one above another in a first frame, and a like plurality of cylinders are mounted in a second frame. The blocks are so arranged that rubber scrap pulverized in the recess of one block is fed into the recess of the next lower block for further pulverizing. All of the cylinders are driven in rotation by a single motor through a belt or chain drive. A hydraulic cylinder piston unit is provided for raising the first frame relative to the second frame and thereby varying the gaps between the cylinders and the respective recesses of the blocks.

Abstract: An optical modulator in which waveguide regions are disposed at opposite ends of a modulation region to reduce the capacitance of the device and prevent pn junctions from exposure to air. On an n-side electrode there are laminated a substrate, an n-type clad layer and an optical modulation waveguide layer. A modulation region lies at the center of the optical modulation waveguide layer along the direction of travel of light, and two waveguide regions are disposed at opposite ends of the modulation region, respectively. On the optical modulation waveguide layer which constitutes the modulation region there are laminated a non-doped layer, a p-type clad layer and a p-side electrode, and a semi-insulating semiconductor is formed on the optical modulation waveguide layer which forms the two waveguide regions.

Abstract: A high-output, single fundamental transverse mode solid state laser is disclosed which uses a semiconductor laser array as an excitation light source. The solid state laser comprises: a laser element which includes a core containing an element added as a laser medium, a cladding containing no such laser medium element, and reflecting mirrors coated over the cladding surface for repeatedly reflecting incident excitation light so that it may repeatedly pass through the core; an excitation light source formed by semi-conductor laser or light emitting diode array; means for guiding the excitation light from the excitation light source to one side of the laser element for incidence thereto; and a resonator for the oscillation of the solid state laser.

Abstract: A communication network and its user i has a device for implementing a common key cryptosystem, an identifier of the user i represented by ID.sub.i which is made public in the network, an authentication key of a user i represented by S.sub.i is known only to the network and the user i and these identifiers and authentication keys of all the users are stored in a database of the network. Data for authentication and encrypted data of a cipher key for the subsequent privacy communication are sent from the network to the user, the user presents his identifier (ID) to the network, after which up to three interactions take place between the network and the user to perform the required authentications and distribution of the cipher key.

Abstract: An original grayscale image or color image to be coded is processed by a bi-level image mingled still image coding system to produce a differential image. The original image and the differential image are compared for each pixel block. Only those of the pixel blocks for which the bi-level image mingled still image coding system will be more efficient than a natural image coding system are encoded by the bi-level image mingled still image coding system, and the other pixel blocks are encoded by the natural image coding system. The coding method of the present invention is directed to a grayscale or color image containing an area where pixel values undergo an abrupt change, such as an edge of a letter, or a document with multi-color and natural color images intermingled therein. The method of the present invention obtains a less deteriorated coded image even from an image in which the edge area is very blunt, and moreover, the invention permits high efficiency coding.

Abstract: In a process for biological production of an amide wherein a nitrile is hydrated into a corresponding amide by the action of a nitrile hydratase originated in a microorganism, the improvement which comprises the use of nitrile hydratase which is obtained by culturing a microorganism of the species Rhodococcus rhodochrous in the presence of a cobalt ion.Aromatic nitriles such as a cyanopyridine as well as aliphatic nitrile such as acrylonitrile are hydrated into the corresponding amides.

Abstract: An extrusion head for an extrusion installation for extruding plastic material and having two, three or four extrusion cylinders has a stationary part which is fixedly mounted on the discharge ends of the extrusion cylinders and has flow channels for directing extrudate leading from the cylinders to a central extrusion location at which there is a seat for an extrusion die. Two movable extrusion head parts are hinged on the stationary part for movement between a closed position in which the movable extrusion head parts define an extrusion orifice for the extrudate and hold the extrusion die on its seat and an open position for cleaning. The movable extrusion head parts are moved between open and closed position by piston-cylinder units having cylinders pivotally mounted on the stationary part and having piston rods pivotally connected to lugs on the movable extrusion head parts.

Abstract: An extrusion head for sheathing elongate objects such as cables has a housing with an elongate bore in which there is a hollow mandrel through which is passed the object to be sheathed. At the discharge end of the mandrel there is a forming tool made up of an annular forming tool part on the mandrel and a concentric forming tool part at the adjacent end of the bore of the housing. An extruder connected to the extrusion head housing forces sheathing material into the bore of the housing and out through the forming tool to form a sheath on the cable or other object as it is passed through the hollow mandrel. A rotor which is rotatable on the mandrel has a screw thread web of decreasing height for propelling sheathing material toward the forming tool. There are lubricated radial seals between the rotor, mandrel and housing. For applying a double layer sheath, there are two entrusion heads interconnected one behind another and supplied with sheathing material by two extruders.

Abstract: There is disclosed a synchronizing signal detector for a multi-beam optical disk unit employing a semiconductor laser array as an optical head, in which detection of a synchronizing signal is performed when all-bit coincident is detected in one half or more of multi-beams or when almost all-bit coincident is detected for a beam within a small number of bits before or after the all-bit coincident in another beam. Once a first synchronizing signal of each sector is detected, synchronizing signals of the subsequent second, third, . . .

Abstract: A process for producing an inorganic fiber-based prepreg sheet, which comprises preparing a slurry containing 35-80% by weight of a phenolic resin powder of 0.01-100 .mu.m in average particle diameter, 65-20% by weight of an inorganic fiber (the amounts are based on the total amount of the two) and a nonionic high-molecular fixing agent, making the slurry into a sheet in the same manner as in the paper making, and allowing the sheet to contain a silane coupling agent; and a process for producing an insulating laminate, which comprises laminating a prepreg sheet produced by the above process.

Abstract: Apparatus for cutting profile strips of rubber mixture produced by extrusion and/or calendering and transported to the cutting apparatus by a conveyor which is intermittently stopped for making a cut has a motor driven rotating knife which is moved transversely of the profile strip by a roll-ring drive and is raised to a height above the profile strip for return movement of the knife. In one embodiment, the knife, its driving motor and the mechanism for moving the knife transversely of the profile strip are mounted on a seesaw which is pivoted on horizontal axis and is moved pivotally by a pneumatic servo-motor to raise and lower the knife. In other embodiments the knife and transverse movement mechanism are mounted on a movable carriage, which is raised and lowered by a pneumatic servo motor while the motor for driving the knife in rotation is mounted on the frame of the apparatus and connected to the shaft of the knife by a flexible or telescopic connecting shaft.

Abstract: A screw extruder having a cylinder, an extrusion head, a screw in the cylinder and a motor for driving the screw in rotation has insert members which extend into the cylinder to effect plastification and homogenization of the material being extruded. The web of the screw is provided with annular recesses into which the insert members project. Some of the insert members are stationary, in the form of pins projecting radially into the cylinder, while others are movable so as to vary the extent of their projection into the cylinder. The movable insert members may be pins extending radially into the cylinder and movable radially, rotatable threaded pins extending tangentially into the cylinder, rotatable pins extending tangentially into the cylinder and having non-circular portions in the cylinder, or sector-shaped discs which are movable pivotally.

Abstract: The motor-driven pulsator comprises, inter alia, a turbine (10) having a distributor (11) and an air-agitating member (12), and an electric motor (20) having a casing (200), a shaft (210) and a connector (220). This motor-driven pulsator comprises a mounting arrangement (30) consisting of a passage (31) permitting the unrestricted introduction of the member (12) into the distributor (11), an orientation means (32) for fixing, as desired, the relative rotational positions of the casing (200) and of the distributor (11) and securing elements (33) for joining the distributor (11) and motor (20).