FILM KEYBOARD Russian patent published in 1999 - IPC

FIELD: peripheral devices of electronic computers. SUBSTANCE: keyboard has a number of film layers fully stuck together by means of adhesive. Two external protective layers and two plates between which all layers are compressed enable keyboard operation at reduced pressure. Connectors of film-layer strips and keyboard plates are hermetically sealed structures. Keyboard is provided with rubber gaskets which are varnishing jointly with part of board. Such mechanical design enables using keyboard under severe climatic conditions and transporting it by motor vehicles at pressure as low as 30 mm of mercury. EFFECT: provision for using keyboard at high relative humidity and reduced pressure. 2 cl, 3 dwg