Abstract: An X.25 protocol apparatus can communicate with another X.25 apparatus or a X.32 apparatus through a telephone network, an ISDN network, or a PBX network, by attaching protocol conversion system to the X.25 apparatus. The conversion system has a pair of signal identification portions (1, 6) for separating a receive packet to a data packet and a control packet, a call process portion (3, 12) for dial signal process, and an address table (4) and a packet edition portion (5) for address conversion of a control packet. A data packet is forwarded from one signal identification portion to another signal identification portion through direct path (53). A control packet is forwarded to a control packet identification portion (2) for control process which includes dial signal process, address conversion, and protocol sequences. This system is applicable to couple a data communication network which has a X.32 correspondence portion to another data communication network.

Abstract: The invention provides a method for accurately and precisely measuring a converted rate of a catalyst for HC/CO/NOx, NOx, and HC/CO and detecting deterioration using two air/fuel ratio sensors disposed on the upstream and downstream sides of the catalyst. The converted rate of the catalyst is determined based on a predetermined relationship between the mean converted rate and a reduction ratio of output amplitudes of the downstream sensor to the upstream sensor. The catalyst is determined to be deteriorating when the reduction ratio becomes less than a predetermined value.

Abstract: A piperidine derivative represented by the following general formula (I): ##STR1## wherein R.sub.1 and R.sub.2 are the same or different and each independently represents a hydrogen atom, a halogen atom, a lower alkyl group, or a lower alkoxy group; R.sub.3 represents a hydrogen atom or a lower alkyl group; X represents an oxygen atom or a sulfur atom; Y represents an alkylene group having 1 to 7 carbon atoms which may be optionally substituted with a lower alkyl group, or Y represents an --A--O--B-- group wherein A and B are the same or different and each independently represents an alkylene group having 1 to 3 carbon atoms which may be optionally substituted with a lower alkyl group is disclosed.

Abstract: Image reading apparatus having a D/A converter with a controllable output includes a light source for illuminating an original image. A reading device is provided for photoelectrically reading the original image illuminated by the light source and generating an analog image signal. A D/A converter is provided having a digital input terminal, an analog output terminal, and a reference terminal. The analog image signal generated from the reading device is applied to the reference terminal. The D/A converter attenuates the level of the analog image signal applied to the reference terminal based on a damping factor corresponding to the digital data applied to the digital input terminal. The thus-attenuated analog image signal is then output to the analog output terminal. An amplifier is provided for amplifying the attenuated analog image signal output from the analog output terminal of the D/A converter.

Abstract: A thiazetoquinoline-3-carboxylic acid derivative represented by the general formula (I) ##STR1## wherein R.sub.1 is a hydrogen atom or a lower alkyl group; R.sub.2 is a fluorine atom or a chlorine atom; R.sub.3 is a hydrogen atom, a lower alkyl group, a lower alkanoyl group, a halogenated lower alkanoyl, or alkoxycarbonyl group; and R.sub.4 is a hydrogen atom or a lower alkyl group, and a pharmacologically acceptable salt thereof, a process for preparation thereof, a pharmaceutical composition comprising the same, and a method for the treatment of an infectious disease by administering the same, are disclosed.

Abstract: A retainer used for an air bag is formed of synthetic resin-impregnated paper. The retainer is reduced in weight, has a shape adaptibility and can be served at a reduced cost. Further, the attaching operation is easy to improve productivity.

Abstract: A piperidine derivative represented by the following general formula (I): ##STR1## wherein R represents a hydrogen atom or a lower alkyl group; X represents --CH.dbd.CH--, --CH.sub.2 CH.sub.2 --, or --CH.sub.2 O--; Y represents an alkylene group having 1 to 5 carbon atoms which may be optionally substituted with a lower alkyl group, or Y represents an --A--O--B-- group wherein A and B are the same or different and each independently represented an alkylene group having 1 to 3 carbon atoms which may be optionally substituted with a lower alkyl group is disclosed. Also disclosed are a pharmacologically acceptable salt of a compound of formula (I), a method for preparation of a compound of formula (I), an antihistaminic and antiallergic agent comprising a compound of formula (I), a pharmaceutical composition comprising a compound of formula (I), and a method for the treatment of an allergic disease by administering a compound of formula (I).

Abstract: Image reading equipment has a light source for irradiating an original image, a reader for photoelectrically reading the original image, a detector for detecting a peak output level of said reader and a controller for controlling a read operation by the thus detected peak level. The original image is scanned at a speed appropriate for the light quantity exposing the original so that a stable reading of the original is realized even when the quantity of exposing light is deficient.

Abstract: An ignition system for internal combustion engines comprises means for generating an ignition signal in synchronism with the revolution of an internal combustion engine and an ignition circuit device for interrupting a primary current of an ignition coil in accordance with the ignition signal. The ignition circuit device includes an ignition monitor signal producing circuit for producing an ignition monitor signal which circuit operates to set the ignition monitor signal at the time of starting the energization of the ignition coil and thereafter to reset the ignition monitor signal at a subsequent predetermined timing, whereby the ignition circuit device operates, in accordance with the pulse width and the set and reset conditions of the ignition monitor signal, to decide whether the operation of the ignition circuit device is normal or abnormal, to control to generate a predetermined amount of ignition energy, and to prevent erroneous generation the ignition monitor signal due to a noise or the like.

Abstract: A method and apparatus for press-cutting selected patterns in a workpiece. The apparatus includes a plurality of dies and at least one punch element associated with each die. A plurality of backing plates are provided to drive the punch elements against the workpiece when the backing plates are positioned in the operative position. A press-cutting pattern selector selectively positions the backing plates in the operative position or an inoperative position depending upon the pattern to be press-cut.

Abstract: A data regenerative system adapted to receive data signals transmitted with the Non-Return-to-Zero mode comprises a comparator for comparing the voltage level of the received data with a variable threshold to generate a digital comparator output. D-type flip-flops are arranged to receive the comparator output to generate first and second pulses respectively in response to a data strobe clock pulse. The time difference between the first and second pulses is detected to generate an error voltage which is applied to the comparator as the variable threshold to keep the crossing points of the eye pattern of the received signal constantly aligned on the threshold level.

Abstract: The present invention relates to a refractory materials used in processing molten metals comprising combining at least one of the refractory materials selected from the group consisting of SiO.sub.2, Al.sub.2 O.sub.3, MgO, ZrO.sub.2 with an activatable element for labeling which has an activation cross section of over 1 barnand apparatus made from a plurality of differently labeled refractory components.

Abstract: A continuous casting apparatus having a mold, a device for withdrawing the cast object from the mold object for sopporting the cast object during withdrawal, an electromagnetic agitator at a position along the path of the withdrawn cast object opposite the crater of molten metal within the cast object, and a plurality of rolls of non-magnetic material in the vicinity of the electromagnetic agitator for supporting the cast object being withdrawn from the mold. The electromagnetic agitator has a core on opposite sides of the path of the cast object having a plurality of deep slots therein facing the cast object, coils wound around the cores at the bottoms of the deep slots, and a housing of non-magnetic material over the cores on opposite sides of the path of the cast object. The housing for the cores has a head over the portions of the cores between the slots and tapering toward the path of the cast object, the housing protecting the core and the coils.

Abstract: A continuous casting method for the production of a casting having a solidified metallic structure which is nearly all composed of equiaxed crystal uniformly distributed, by agitating the crater of the cast object during the process of solidification by applying a travelling electromagnetic field to an extent sufficient to make the velocity vector of the main flow of the agitated molten metal present in the plane perpendicular to the direction of withdrawing the cast object and to confine the entire flow in such crater within the limited agitation zone, and an apparatus for carrying out the method.