Abstract: Provided is a diaphragm valve whose durability is improved by proper caulking. On a bottom surface 2d of a depression 2c of a body 2, an annular inner projection 22 having a relatively small diameter and an annular outer projection 23 having a relatively large diameter are provided. A seat 5 is made of synthetic resin and is inserted between the inner projection 22 and the outer projection 23. Both projections 22, 23 are caulked, whereby the seat 5 is prevented from coming off. The height of the inner projection 22 is less than that of the outer projection 23, and a corner 22a on the outside of the inner projection 22 has a curved surface.

Abstract: A fluid controller includes an automatic opening-and-closing device configured to move a valve rod upward and downward, and a manual opening-and-closing device configured to move the valve rod upward and downward by a manual operation. The manual opening-and-closing device includes a cylindrical handle supported by a casing so as to be rotatable and not to move upward and downward, and a cylindrical operating member screwed into a female screw of the handle and configured to move upward and downward with a rotation of the handle. The operating member is apart from a piston of the automatic opening-and-closing device in a vertical direction in an automatic operation. The piston is moved by the operating member which moves upward in association with the rotating operation of the handle in a manual operation in an opposite direction from the opening state brought by the automatic opening-and-closing device.

Abstract: There is provided a fluid controller actuator which does not require a plurality of bolts for fixing an inner side spring presser to a casing, in which a configuration is simple and assembly does not take time and effort, and further, in which a biasing force of an biasing member can be adjusted from the outside after the assembly. An inner side spring presser (15) includes a shaft portion (22) and a cylinder portion (23) provided at a lower edge portion of the shaft portion (22), and presses an upper side peripheral edge portion of a through hole (12a) of a biasing member (12) by a lower end of the cylinder portion (23). The shaft portion (22) penetrates an outer side spring presser (16) and extends upwardly. An adjustment screw (19) which positions the inner side spring presser (15) as a lower end abuts against an upper surface of the shaft portion (22) of the inner side spring presser (15), is screwed to a top wall (11d) of a casing (11).

Abstract: A heater built-in valve usable even under a high-temperature condition beyond 200° C. is provided. Piston driving means 7 has an upper compressed-air introducing chamber 24 for moving a piston 6 downward, and a lower compressed-air introducing chamber 25 for moving the piston 6 upward. Piston sealing means 8 has an upper bellows 29 that seals the upper compressed-air introducing chamber 24, and a lower bellows 30 that seals the lower compressed air introducing chamber 25.

Abstract: A heater built-in valve usable even under a high-temperature condition beyond 200° C. is provided. Piston driving means 7 has an upper compressed-air introducing chamber 24 for moving a piston 6 downward, and a lower compressed-air introducing chamber 25 for moving the piston 6 upward. Piston sealing means 8 has an upper bellows 29 that seals the upper compressed-air introducing chamber 24, and a lower bellows 30 that seals the lower compressed air introducing chamber 25.

Abstract: A packet communication quality measurement method and system in which two quality measurement devices connected via a packet communication network exchange a probe packet via the network. The packet communication quality is calculated based on the transmission/reception status of the probe packet. Probe packets are intermittently transmitted from one quality measurement device to another via the network at a predetermined interval, and received by the other device. The communication quality of each probe packet is calculated based on the transmission/reception status of the probe packet. The communication quality of user packets is estimated by weighting the communication quality of probe packets in accordance with the number of user packets flowing in a desired measurement direction along the path which connects the quality measurement devices at an interval between transmission of a previous probe packet and transmission of the probe packets.

Abstract: In a packet communication quality measurement method in which two quality measurement devices connected via a packet communication network exchange a probe packet via the packet communication network and the packet communication quality is calculated based on the transmission/reception status of the probe packet, probe packets are intermittently transmitted from one quality measurement device to the other quality measurement device via the packet communication network at a predetermined interval, and received by the other quality measurement device. The communication quality of each probe packet is calculated based on the transmission/reception status of the probe packet. The communication quality is weighted in accordance with the number of packets flowing in a desired measurement direction along the path which connects the quality measurement devices at an interval between transmission of a previous probe packet and transmission of the probe packet.

Abstract: A sensor according to this invention comprises an oscillation circuit including an LC resonant circuit, wherein a detection signal is prohibited upon arrival of an external radio wave.