Abstract: A fluid control device 10 comprises a valve device V2 including actuators 22 and 24 for opening and closing a flow path and adjusting a flow rate of a fluid flowing through the flow path, a pressure sensor PT provided upstream of the valve device V2, and a control circuit 12 connected to the valve device V2 and the pressure sensor PT, and the control circuit 12 controls an operation of the actuator based on a pressure measured by the pressure sensor PT and a reference pressure drop curve, while the upstream side of the fluid control device is closed and the valve device is opened using the actuators.

Abstract: This invention relates to a communication apparatus which avoids interruption in the operation for an outgoing call of the first party from an extension telephone apparatus. In the case where there is conflict between an incoming call from the third party and an outgoing call from the first party in a selected unoccupied communication line, a call signal is transmitted to the all open extension telephone apparatus, at the same time, an other unoccupied communication line is automatically selected for the outgoing call. Accordingly, the conflict is avoided and the incoming call needs not be responded at the first party's telephone extension when a telephone number is being inputted, however, the fact that a call from the third party has been received is signaled on all open telephone extensions and can be answered there.

Abstract: A communicating system has a control unit to perform a switching control of lines, a communicating apparatus which is connected to the control unit and operates in accordance with the control by the control unit and another terminal such as a facsimile apparatus connected to the communicating apparatus, wherein the communicating apparatus has connecting apparatus to connect this terminal with the control unit independently of the control by the control unit. The communicating apparatus consists of a button telephone set connected to the control unit by a communicating line and a control line. With this system, the switching operation can be performed without needing a complicated control and the connecting lines such as speech lines and control lines can be efficiently used. The user can arbitrarily switch the line of the communicating apparatus to which the facsimile apparatus is connected.

Abstract: Disclosed is a communication system which accommodates at least one central office network line and a plurality of extensions, and which is adapted to control line connection between the central office network line and the plurality of extensions. When a call from the central office network line is detected, it is determined in response to the call whether a control signal characteristic of data communication, such as a CST signal, is being sent by the other party's device. If such a control signal is being sent, a line to which a data processor is connected is selected and connected to the calling line. This makes it possible to connect an information processor and a telephone to a common central office network line, and to connect a call answered by another telephone to a desired information processor rapidly through a simple operation. Accordingly, it is unnecessary to assign a special-purpose central office network line to an information processor.

Abstract: A character input/display apparatus comprises means for inputting information, means for designating a cursor position, a memory for storing the input information, a display having a first display unit for displaying a layout of the information stored in the memory and a second display unit for displaying a portion of the information stored in the memory, and control means for displaying a cursor on the first display unit and the second display unit in different manners.

Abstract: An erasing process is accomplished by scanning a target with an unmodulated electron beam under the condition of secondary electron emission ratio of the target (.delta.) above a unit value. Then a writing process is carried out by scanning the target with a modulated electron beam under the condition .delta. < 1, and finally a reading process is achieved by scanning the target with an unmodulated electron beam also under the condition .delta. < 1.