Patent ID: 7930454

Claim:
A client server system with one server (C) and at least one thin client ( 1 , 1 ′) characterized in that the thin client is a thin client terminal ( 1 , 1 ′) for use in an explosive area (ExB), having a data processing device ( 11 , 11 ′) having graphics capabilities that can be programmed by means of software and having its own storage and computing capacity, said device being connected through at least one data transmission channel (K) to a computer (C) that is not located in the explosive area (ExB) and that functions as a server, said device, as the thin client, being capable of communicating with the computer (C) according to the client-server principle and a display ( 12 ) connected to the data processing device ( 11 , 11 ′) for purposes of displaying data, whereby the thin client terminal ( 1 , 1 ′) is configured to be explosion-protected or intrinsically safe so that it can be used in the explosive area (ExB), and a) wherein the data processing device ( 11 , 11 ′) receives a certain maximum volume of basic data per unit of time from the server (C), and said device generates a volume of graphic data from this per unit of time and transmits it to the display ( 12 ), said data, averaged over time, being more extensive, here preferably averaged over time more extensive by a factor of at least 10, than the volume of basic data received per unit of time by the data processing device ( 11 , 11 ′) from the server (C), and/or b) wherein the thin client terminal ( 1 , 1 ′) also has a keyboard ( 13 ) that is configured to be explosion-protected or intrinsically safe and that is connected to the data processing device ( 11 , 11 ′), and/or a barcode reader ( 15 ) that is configured to be explosion-protected or intrinsically safe, and/or a mouse ( 14 ) that is configured to be explosion-protected or intrinsically safe, and/or at least one other pointing device, for example, a trackball, finger mouse or touchpad, that is configured so as to be explosion-protected or intrinsically safe and that is connected to the data processing device for purposes of inputting data, and/or at least one sensor is connected to the data processing device ( 11 , 11 ′), and wherein the data processing device ( 11 , 11 ′) receives a certain maximum volume of raw data per unit of time from the keyboard ( 13 ) and/or the mouse ( 14 ) and/or the barcode reader ( 15 ) and/or one or more sensors (S) connected to the data processing device ( 11 ′), wherein the device generates a volume of processed data from this per unit of time and transmits it to the server (C), said data volume being less extensive averaged over time, preferably less extensive by a factor of at least 10, than the volume of raw data received by the data processing device ( 11 , 11 ′) per unit of time.