Abstract: A data transmission system utilizing a power line comprises a transmitter (1), a receiver (2) and a repeater (5) coupled to a power line (3). Control data including a start code in the form of a high frequency signal is transmitted from the transmitter (1) in superposition on an alternating current of the commerical power supply using the power line. The repeater receives the control data transmitted from the transmitter, thereby to store the control data in a memory responsive to the start code. The control data is then read from the memory after the lapse of a predetermined period of time and is retransmitted to the receiver in a predetermined level. The receiver receives the control data, thereby to control an apparatus being controlled such as a relay, whereupon the same transmits in a return manner the data representing a control state thereof. The repeater receives the data and transmits the same to the transmitter.

Abstract: A tertiary olefin is produced by contacting a gaseous tertiary ether usually represented by the following general formula: ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are alkyl groups each having 1-4 carbon atoms which may be same or different and R.sup.4 is an alkyl group having 1-3 carbon atoms, with a catalyst obtained by calcining a silica-alumina compound at 700.degree.-1100.degree. C. in order to effect cracking of the tertiary ether. This reaction may be carried out in the presence of steam to result in further improvements.

Abstract: The sputtering on polyacetal article is improved by coating the article, before the sputtering step, with a primer solution of a chlorinated polyolefin in a chlorine-containing solvent in respect to adhesion between the article and the sputtering layer.

Abstract: A transmitter connected to any phase of a 3-phase alternating current transmits a data subsequent to a lock signal in synchronism with the cycles of the phase. A receiver connected to any phase of the 3-phase alternating current receives a lock signal in synchronism with the cycles of the phase. The receiver receives each data after the receiver is synchronized with the transmitter using the lock signal. The synchronized relation is maintained, that is locked until each data transmission subsequent to a lock signal is terminated. The lock is released upon detection of an end signal added to the last portion of each data or a non-busy signal interval. In the case wherein a data transmission is repeated a plurality of times, a set of signals including a lock signal and a data is repeatedly sent out, interleaved with a non-busy signal interval.

Abstract: The present invention relates to a process for dyeing cellulose fibers or its union fibers which is effected according to an exhaustion dyeing method using a reactive dye containing at least one s-triazinyl group having a group of the formula: ##STR1## wherein M represents a hydrogen or an alkali metal, in an aqueous dyeing bath having a pH in the range of 4 to 10 and a dyeing temperature in the range of 110.degree. C. to below 140.degree. C.

Abstract: A data transmission system utilizing a power line transmits a data signal of a plurality of bits in a serial fashion in synchronism with the cycles of the alternating current of a power supply. A start signal, channel section signal, control data signal and end signal are sequentially generated to transmit the control data to a selected receiver to control a desired output. Each cycle is divided into at least two phase sections, the one being used for a busy signal and the other being used for a data signal. The data transmission system includes a plurality of transmitters and a plurality of receivers coupled to the power line. Each of the transmitters comprises a receiving circuit for receiving a busy signal from other transmitters, a transmitting circuit for transmitting a data signal, a key input switch for operation, a selecting switch for selecting a channel which receives the transmitted data signal, and a memory for storing the key input signal.

Abstract: A transmitter control system for transmitters having means for selectively switching one channel to another in the multiple channels and means for controlling the transmitter output so as to deactivate, activate and reduce the transmitter output. The system comprises comparator means for comparing a start signal from the transmitter output control means with a detected signal of the transmitter output, the output of the comparator means being adapted to selectively drive at least one of the channel switching means for switching channels and a transmitter power reduction control circuit included in the transmitter output control means upon occurrence of a detected signal of the transmitter output indicative of a failure of the transmitter.

Abstract: A tertiary olefin is produced by making a gaseous tertiary ether usually represented by the following general formula: ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are alkyl groups each having 1-4 carbon atoms which may be same or different each other and R.sup.4 is an alkyl group having 1-3 carbon atoms, contact a catalyst obtained by calcining a silica-alumina compound at 700.degree.-1100.degree. C. in order to carry out cracking of the tertiary ether.

Abstract: An aromatic primary hydroperoxide is produced by oxidizing a methyl-substituted aromatic compound in a liquid phase with a molecular oxygen-containing gas at a temperature of 80.degree.-150.degree. C. under a pressure of the atmospheric to 100 kg/cm.sup.2 gage in the presence of 8-300 parts by weight of an aliphatic tertiary hydroperoxide per 100 parts by weight of the methyl-substituted aromatic compound. The oxidation reaction is promoted, an aromatic primary hydroperoxide content of the reaction products is increased, whereas by-products are reduced, and a selectivity to the aromatic primary hydroperoxide is considerably increased.