Abstract: A communication channel establishing method by which point-to-multipoint or multipoint-to-point connections by a communication network which includes exchanges (switches) can be established at a high speed. When a connection establishment request designating called users 11, 12 and 13 is received from calling user 10, switch 100 retrieves routes to the individual called users and selects switch 102 in the next stage and sends out a connection establishment request to switch 102 designating called users 11, 12 and 13. Switch 102 further retrieves routes to the individual called users and selects switch 103 for called users 11 and 12, but selects switch 104 for called user 13. Then, switch 102 sends out connection establishment requests to switches 103 and 104 individually designating the relevant called users. Any connection establishment request received from a switch of the preceding stage is successively repeated to a selected switch in the next stage until each called user is reached.

Abstract: An injection molding apparatus comprising an injection unit having a plurality of injection nozzles of which respective distal end portions move back and forth between a first position and a second position, a mold clamp unit comprising a first mold clamp unit having a first frame body and an upper mold, a second mold clamp unit having a second frame body and a lower mold. A plurality of nozzle reception portions to which the distal end portions of the injection nozzles fit respectively are formed in one of the first and second frame bodies, and a resin introduction passage for introducing the molten resin from central portions of the plurality of nozzle reception portions to a plurality of cavities formed between the upper mold and lower mold as they are clamped is formed. The plurality of injection nozzles are mounted to the injection unit so as to permit the respective distal end portions to move loosely in any direction in response to an external force applied thereto.

Abstract: A magneto-optic disk apparatus for use with a magneto-optic disk in which a recording surface made of a magneto-optic information recording medium is formed on a transparent substrate having a birefringence. The magneto-optic disk apparatus includes an optical head for performing a recording and a reproduction by a laser beam for the recording surface, and a unit for eliminating a fluctuation component occurring in a reproduction magneto-optic signal, the fluctuation component eliminating unit being arranged in a convergent light up to an analyzer in a detection optical system.

Abstract: A radiator support bracket includes a bracket body and a stopper member. The bracket body is uniformly made of resin and has a plate-like base portion to be fixed to the vehicle frame, a transformable arm portion that extends from the base portion, and a support portion that holds the upper side of the radiator. The stopper member can also be made of resin uniformly with the bracket body.

Abstract: In a packet switched network, each network node has line and trunk ports to which LAN user terminals and links are connected and which are identified by a port address containing a node number plus a port number. Each of the user terminals transmits a first signaling packet when establishing a connection before sending information-bearing packets, containing in it a source network address which includes a protocol identifier and a source user address, and a destination network address which includes the same protocol identifier and a destination user address. Each network node includes a memory for establishing correspondences between the network addresses of remote user terminals, the port addresses of the remote user terminals, and the port numbers of the ports of the network node through which local user terminals are accessible to the remote user terminals.

Abstract: A pipe for a cooling unit comprises an outer pipe, and an inner pipe shorter than the outer pipe and located at an evaporating portion in the outer pipe, a circulation gap being defined between the inner wall surface of the outer pipe and the outer wall surface of the inner pipe and leading from one end to the other end of the inner pipe, whereby working liquid is permitted to boil up continuously and stably in the evaporating portion even uder a low temperature flow of working liquid.

Abstract: A high speed freezing apparatus in use for a refrigerator. In the freezing apparatus, evaporators for the cold and freezing chambers are coupled in a series relation with respect to a compressor. An electromagnetic valve is provided in parallel with the evaporator for the cold chamber. When a high speed freezing start signal is produced from an operating section mounted on a front panel of a door for the freezing chamber, a timer circuit provided in a control section is operated. An operating condition of the compressor is detected by a detecting transformer and a given signal is produced from a start-failure preventing circuit. The start signal is transferred through a gate circuit to a relay portion only during the time that the given signal is transmitted to a gate circuit. Through the relay portion, the compressor and the electromagnetic valve are driven, so that the refrigerant is supplied to only the evaporator for the freezing chamber to start the high speed freezing operation.