Abstract: An ozone generator (100) includes: a flow path (1) through which gas flows from an inlet (5) to an outlet (6); an ozone generation unit (3) disposed in the flow path (1); and an ozone sensor (4) disposed in the flow path (1) and upstream of the ozone generation unit (3). The flow path (1) has an upstream-side flow path (130) that forms a gas passing space (AR) located upstream of the ozone generation unit (3) and through which the gas flows from one side to another side in a predetermined direction. The inlet (5) is disposed closer to an outer circumferential portion (131) of the upstream-side flow path (130) than the ozone sensor (4).

Abstract: A system comprises a means to enter hypothetical scenario data required for decision making and data necessary for decision making scenario module, being composed of information such as an occurrence probability value and an estimated gain value, a means to enter a logical combination relation for combining the decision making scenario modules by using logical symbols or commonly used words to build a composite decision making module, a means to process, according to the logical combination relation, hypothetical scenario data corresponding to a desired composite scenario and decision making information, display the processing results in a predetermined diagram form and store them in a database, a means to search decision making scenario modules stored in the database, and a means to incorporate into a module information required for decision making and a method of processing the information.

Abstract: The invention provides a heat recovery method for use in sulfuric acid production plants by which the heat generated in the step of drying SO2 gas or the step of drying air, and the step of absorbing sulfur trioxide in the plant is effectively utilized for heating the water to be supplied to a boiler although the heat is conventionally discarded because of the difficulties encountered in using the heat effectively. The boiler water to be supplied is heated by utilizing the heat generated by drying and/or absorption in a drying tower of the plant for drying sulfur burning air or the sulfur dioxide and/or in an absorption tower of the plant for causing circulating concentrated sulfuric acid to absorb sulfur trioxide produced by the conversion of the sulfur dioxide.

Abstract: Database manipulation, data processing and report output processing are supplied as software parts referred to as methods, respectively. In a procedure, the methods are arrayed in a sequence in which they are to be executed, and input/output files and conditions are defined for the methods, respectively. A control unit executes the methods in accordance with the conditions for thereby executing the procedure.

Abstract: A sealed contact unit that attains stabilized contact switching operation and effective dimensional minimization with an arrangement wherein a switching contact section including opposing movable and stationary contacting members is housed within a sealed container together with an electrically insulating gas, a movable shaft interlocked to the movable contacting member is hermetically passed through a wall of the container to be axially shiftable with an end projected externally while the movable contacting member biased away from the stationary contacting member by a resetting spring is mounted through a contact-pressure spring to the other end of the movable shaft inside the container, the contact-pressure spring being provided to coaxially enclose the movable shaft and biasing the movable contacting member against the biasing force of the resetting spring for attaining a contact-pressure when the movable contact member shifts to engage the stationary contact member fixed inside the container, a driving se

Abstract: A damper is provided by a plurality of chambers defined between stacked thin sheet members and containing a fluid for flowing therein through a communicating section, the chambers being made to be of a small height in the direction perpendicular to the plane of the sheet members and to form a buffer section with at least one of the chambers. With such damper employed in electromagnet assemblies and eventually relays including the assemblies, they can be sufficiently minimized in size, and their manufacture can be also made extremely easier.

Abstract: An electromagnetic relay includes a pair of contacts of high fusion-bonding resistance and a further pair of contacts of low contact resistance, which pairs being connected mutually in parallel relationship, with an actuator of an electromagnet unit interposed between them and respectively having a movable contactor carrying a movable contact of the pair and provided for contact opening and closing with respect to a stationary contact of the pair by means of the actuator of the electromagnet unit, whereby the pair of contacts of low contact resistance can be prevented from causing any fusion-bonding and any temperature rise around the pair can be effectively restrained.

Abstract: A contact device is provided with an additional mass member secured to a movable contactor carrying a movable contact capable of opening and closing contacts with a stationary contact, for providing to the movable contactor a mass acting in a direction perpendicular to longitudinal axis of the contactor. A rolling motion is thereby caused to occur in the movable contactor upon contact closing motion so that the movable contact can be prevented from being fusion-bonded to the stationary contact.

Abstract: A polarized electromagnet with improved response sensitivity includes an axially movable core 63 extending through an excitation coil 61 to be movable between two positions upon energization and deenergization of the coil 61. The core 63 is formed at its opposite ends respectively with pole plates 69 extending transversely of the core axis. Inner and outer yokes 64 and 65 are arranged in parallel to the core 63 and are magnetized to the opposite polarities by a permanent magnet 65. Inner and outer yokes 64 and 65 have at respective ends inner and outer pole ends 67 and 68 which are spaced axially to each other so as to form therebetween magnetic gaps in each of which the adjacent one of the pole plates 69 is located.

Abstract: A circuit breaker includes an arc shearing plate which is driven to thrust between a pair of contacts being separated so as to shear an arc formed therebetween for rapid arc extinction. Included in the circuit breaker is an over-current responsive actuating member which applies an impact to one of the contacts for rapid contact separation in response to a predetermined over-current condition such as caused by a short-circuit. The actuating member is also coupled to the arc shearing plate so as to control the thrusting movement of the arc shearing plate in synchronism with the rapid contact separation, whereby the timing of inserting the plate between the contacts can be easily controlled with respect to that of separating the contacts for achieving rapid arc extinction and providing a high arc voltage and current limiting action.

Abstract: A remotely controllable relay comprises a rocker pivoted at an intermediate point for rocking at one end in normal or reverse direction in response to forward or backward motion of a movable member of an electromagnet means, and a movable contactor linked to the rocker for contacting with or separating from a fixed contactor in response to the rocking of the rocker. A larger momentum at the other end remote from the pivoted point of the rocker achieved with a smaller momentum of the movable member is utilized to sufficiently separate the movable contactor from the fixed contactor upon contact opening, the smaller momentum movable member allowing the electromagnet means to be minimized in size for a miniaturization of the relay and consumed power saving.

Abstract: An improved remotely controllable circuit breaker comprises a manually operable switching mechanism for opening and closing a single set of first and second contacts, a trip mechanism for opening the contacts upon occurrence of predetermined overload current conditions, and a remotely controllable switching mechanism for selectively opening and closing the contacts in response to a control signal remote from the breaker. The manually operable switching mechanism includes a movable contact arm carrying the first contact to be brought into and out of contacting engagement with the second contact by manipulation of a manual handle. The second contact is operatively connected to the remotely controllable switching mechanism to be driven thereby for movement between an operative position where the second contact is engageable with the first contact and an inoperative position where it is prohibited from being engaged with the first contact independently of the position of the first contact.

Abstract: An improved remotely controllable circuit breaker comprises a manually operable switching mechanism for opening and closing a single set of first and second contacts, a trip mechanism for opening the contacts upon occurrence of predetermined overload current conditions, and a remotely controllable switching mechanism for selectively opening and closing the contacts in response to a control signal remote from the breaker. The manually operable switching mechanism includes a movable contact arm carrying the first contact to be brought into and out of contacting engagement with the second contact by manipulation of a manual handle. The second contact is operatively connected to the remotely controllable switching mechanism to be driven thereby for movement between an operative position where the second contact is engageable with the first contact and an inoperative position where it is prohibited from being engaged with the first contact independently of the position of the first contact.