Alphanumeric section of office machine keyboards

Claim 1

In a keyboard for typewriters, terminals and similar machines in which keys are arranged in general accord with International Organization for Standards recommendations for the alphanumeric sections of keyboards for office machines, an improvement comprising: one left mounting board and one right mounting board, said mounting boards having front and rear edges, the mounting boards together having adjacent ends and outermost ends, and together corresponding to a standard keyboard, and said left and right mounting boards so shaped that they can be fitted with key contacts and keys as actuated by the left and right hands, respectively, in touch typing; a hinge between and connecting said left mounting board and right mounting board, said hinge in a position approximately equidistant from the outermost ends of said mounting boards and likewise approximately equidistant from the front and rear edges of said mounting boards, said hinge permitting the adjacent edges of said mounting boards to be raised vertically at said hinge mounting position; a second hinge connecting the outermost end of one of the said mounting boards to the keyboard chassis or case; a means of locating the outermost end of the other said mounting board, permitting both lateral and pivotal movement; a means of maintaining the lateral position of the mounting board outermost end that is permitted lateral and pivotal movement.