Abstract: Provided is a heater in which heater patterns are provided in parallel between terminals. Each terminal is divided into a divided terminal having electrical conduction only with one heater pattern, and a divided terminal having electrical conduction only with the other heater pattern. After a heater body is fabricated, in a state prior to mounting a feed bolt, resistance adjustment is performed with respect to each of a virtual series path formed between the divided terminals and a virtual series path formed between the divided terminals. Then the feed bolt is mounted to each terminal, whereby a plurality of virtual series heater patterns are placed in electrical conduction with each other, thus forming a parallel circuit.

Abstract: A coated graphite heater. The heater has a configuration comprising a plurality of heating elements having a major portion disposed parallel to an upper surface of the heater so that the major portion is disposed horizontally. The heater configuration provides a heater that exhibits reduced thermal stress and/or reduced CTE mismatch stress particularly compared to designs having heating elements with a major portion oriented perpendicular to the plane of the upper surface of the heater.

Abstract: A coated graphite heater. The heater has a configuration comprising a plurality of heating elements having a major portion disposed parallel to an upper surface of the heater so that the major portion is disposed horizontally. The heater configuration provides a heater that exhibits reduced thermal stress and/or reduced CTE mismatch stress particularly compared to designs having heating elements with a major portion oriented perpendicular to the plane of the upper surface of the heater.

Abstract: A resistance heater is shown and described. The resistance heater may include a body. The body may include at least one heating surface, the heating surface being generally smooth and generally flat and a recess formed in the body, at least a portion of the body having a cross-sectional shape selected from the group consisting of: generally U shape, generally I-shape, and generally H-shape, and where the cross-sectional shape extends along at least a portion of the body.

Abstract: A PG-coated product is produced by: producing a body by using PBN; providing a traceability display made of purified graphite in an arbitrary section of the body surface; and covering the body surface including the traceability display with a PG film. By setting the thickness of the PG film to 100 ?m or less, preferably 80 ?m or less, it is possible to provide transparency sufficient for reading the product serial number displayed on the body surface. Thus, this is a suitable way of displaying traceability. Because graphite does not adversely affect the physical properties of PBN and PG, the functions and durability intrinsic to the product are not impaired, even when the traceability display, which is formed by using graphite, is placed between the body surface made of PBN and the PG film.

Abstract: Vacuum circuit breakers are to gain an extended lifetime by reducing contact face damage of moving and fixed electrodes with improved voltage withstand performance therebetween and enhanced interruption performance. Vacuum circuit breaker of the present invention has bulb 10 having: insulative vacuum tube 11; and fixed electrode 12 on end of current-carrying conductor 13 and moving electrode 15 on end of another current-carrying conductor 16 arranged in insulative vacuum tube 11 with their electrode contact faces opposed each other. Operation system for manipulating current-carrying conductor 16 of moving electrode 15 is equipped with compression-spring 20 and auxiliary compression-spring 21 that increases initial opening speed of moving electrode 15. Auxiliary compression-spring 21 ceases energizing in the middle of a circuit breaking movement of moving electrode 15 and begins storing spring energy in the middle of a circuit closing movement of the same.

Abstract: A large-capacity vacuum circuit breaker that can increase a current shutdown capacity and enables its rated current to be increased includes at least two vacuum circuit breaker units placed side by side and connected in parallel. The two vacuum circuit breaker units are operated by a single common operating unit to concurrently perform current shutdown operations. Each vacuum circuit breaker unit has a vertical magnetic field generating means for generating a vertical magnetic field when an operation to shut down current is performed. The vertical magnetic field generating means is formed by vertical magnetic field electrodes provided in a vacuum container of each of the vacuum circuit breaker unit units or by an external coil provided on the outer circumference of each vacuum container.

Abstract: A resistance heater is shown and described. The resistance heater may include a body. The body may include at least one heating surface, the heating surface being generally smooth and generally flat and a recess formed in the body, at least a portion of the body having a cross-sectional shape selected from the group consisting of: generally U shape, generally I-shape, and generally H-shape, and where the cross-sectional shape extends along at least a portion of the body.

Abstract: A heater has a smooth heating surface and a recess formed on a second surface opposite to the heating surface. The recess is formed between opposite side walls in a lengthwise direction of the heater. Formation of the recess improves the electrical resistance of the heater and the opposite side walls reinforce the heater and prevent deformation of the heater when it is subjected to high temperatures in a semiconductor wafer processing device. The heater has substantially the same width along its lengthwise direction. This improves the control of heat pattern design, because the terminal end portions do not have an expanded shape.

Abstract: Contact plate 11 and Contact base for generating axial magnetic field 12 are made of copper-based alloy such as copper-chromium alloy for example. On the periphery of contact base for generating axial magnetic field 12, Outer circumferential section film 17 is provided. Outer circumferential section film 17 is formed by plasma irradiation of chromium that is a arcing part having a melting point higher than the melting point of contact plate 11.

Abstract: Vacuum circuit breakers are to gain an extended lifetime by reducing contact face damage of moving and fixed electrodes with improved voltage withstand performance therebetween and enhanced interruption performance. Vacuum circuit breaker of the present invention has bulb 10 having: insulative vacuum tube 11; and fixed electrode 12 on end of current-carrying conductor 13 and moving electrode 15 on end of another current-carrying conductor 16 arranged in insulative vacuum tube 11 with their electrode contact faces opposed each other. Operation system for manipulating current-carrying conductor 16 of moving electrode 15 is equipped with compression-spring 20 and auxiliary compression-spring 21 that increases initial opening speed of moving electrode 15. Auxiliary compression-spring 21 ceases energizing in the middle of a circuit breaking movement of moving electrode 15 and begins storing spring energy in the middle of a circuit closing movement of the same.

Abstract: To structure a large-capacity vacuum circuit breaker that can increase a current shutdown capacity and enables its rated current to be increased, at least two vacuum circuit breaker units 1A, 1B are placed side by side and connected in parallel. These at least two vacuum circuit breaker units 1A, 1B are operated by a single common operating unit 10 to concurrently perform current shutdown operations. Each vacuum circuit breaker unit 1A, 1B has a vertical magnetic field generating means for generating a vertical magnetic field when an operation to shut down current is performed. The vertical magnetic field generating means is formed by vertical magnetic field electrodes 3, 4 provided in the vacuum container 2 of the vacuum circuit breaker unit 1A, 1B or an external coil 11 provided on the outer circumference of the vacuum container 2.

Abstract: A heater has a smooth heating surface and a recess formed on a second surface opposite to the heating surface. The recess is formed between opposite side walls in a lengthwise direction of the heater. Formation of the recess improves the electrical resistance of the heater and the opposite side walls reinforce the heater and prevent deformation of the heater when it is subjected to high temperatures in a semiconductor wafer processing device. The heater has substantially the same width along its lengthwise direction. This improves the control of heat pattern design, because the terminal end portions do not have an expanded shape.

Abstract: A contact for a vacuum interrupter, includes: 1) a contact plate; and 2) a contact carrier. The contact carrier includes: a first end face which is fitted with the contact plate, and a peripheral face which is formed with a slit portion in such a manner as to form a coil part. The coil part flows a current such that a longitudinal magnetic field is formed in an axial direction of the contact carrier. The first end face fitted with the contact plate is formed with a circumferential slit portion which connects to the slit portion.

Abstract: An electrode of a vacuum circuit breaker has a cup member and a contact. The cup member has an opening and a periphery which is formed with a slit so as to form a coil section. An electric current flows in the coil section so as to generate a longitudinal magnetic field in a direction along an axis of the cup member. The slit is bent and continuously extends on the periphery from a first end of the cup member to a second end of the cup member opposite to the first end of the cup member. The contact is shaped into a plate, and seals the opening of the cup member.

Abstract: A contact for a vacuum interrupter, includes: 1) a contact plate; and 2) a contact carrier. The contact carrier includes: a first end face which is fitted with the contact plate, and a peripheral face which is formed with a slit portion in such a manner as to form a coil part. The coil part flows a current such that a longitudinal magnetic field is formed in an axial direction of the contact carrier. The first end face fitted with the contact plate is formed with a circumferential slit portion which connects to the slit portion.

Abstract: A contact and a vacuum interrupter using the contact. The contact includes a hollow cylindrical contact carrier and a contact plate disposed on one of the axial end faces of the contact carrier. First slits and second slits extend from the one of the axial end faces of the contact carrier and the other thereof, respectively. The first slits and the second slits are inclined with respect to the center axis of the contact carrier and have a first height x and a second height y extending in the axial direction of the contact carrier, respectively. Assuming that the axial length of the contact carrier is 1, the first height x and the second height y satisfies a relationship given by the following expressions (1)-(3): (1) 0.9≧x, (2) x≧y≧0.2x, (3) 1.4≧x+y≧0.8.

Abstract: A contact and a vacuum interrupter using the contact. The contact includes a hollow cylindrical contact carrier and a contact plate disposed on one of the axial end faces of the contact carrier. First slits and second slits extend from the one of the axial end faces of the contact carrier and the other thereof, respectively. The first slits and the second slits are inclined with respect to the center axis of the contact carrier and have a first height x and a second height y extending in the axial direction of the contact carrier, respectively. Assuming that the axial length of the contact carrier is 1, the first height x and the second height y satisfies a relationship given by the following expressions (1)-(3): (1) 0.9≧x, (2) x≧y≧0.2x, (3) 1.4≧x+y≧0.

Abstract: A contact for a vacuum interrupter, includes: 1) a contact plate; and 2) a contact carrier. The contact carrier includes: a first end face which is fitted with the contact plate, and a peripheral face which is formed with a slit portion in such a manner as to form a coil part. The coil part flows a current such that a longitudinal magnetic field is formed in an axial direction of the contact carrier. The first end face fitted with the contact plate is formed with a circumferential slit portion which connects to the slit portion.

Abstract: In a contact arrangement and a vacuum interrupter using the contact arrangement, the contact arrangement includes: a hollow cylindrical contact carrier on one end surface of which a contact plate is attached; a plurality of first slits formed on the contact carrier from the one end surface of the contact carrier; and a plurality of second slits formed on the contact carrier from each predetermined point of midway through an axial direction of the contact carrier, each of the first and second slits being tilted with respect to the axial direction of the contact carrier, a coil portion being formed on a portion of the hollow cylindrical contact carrier between each of the first and second slits and an adjacent one of the first and second slits and a longitudinal magnetic field being formed along the axial direction of the contact carrier by a current flowing on the coil portion.