1. A portable alphanumeric and symbol drafting device comprising a keyboard unit in functional interconnection to an electronics package unit, wherein; (a) Said keyboard unit further comprises a portable housing with a first longitudinal edge, a lower surface adapted to be placed on a drafting surface, and an upper surface which comprises a keyboard means for inputting at least one character or symbol; wherein further a carriage means for supporting a technical drafting pen is operably mounted for longitudinal (x) and transverse (y) movement proximate said first edge of said housing; means to move said pen carriage in said x and y directions in response to a drawing control signal which comprises a planar member having an extending guideway parallel to said longitudinal housing edge, and an x-axis servo motor and encoder assembly mounted thereon which is operable to respond to one aspect of said control signal, and selectively move said drafting pen carriage, superposed upon said planar member, in the x-direction, parallel to said longitudinal edge; wherein further said y-axis control comprises a y-axis dc servo motor and encoder assembly which is mounted to a base reference of said housing and is operable to respond to a second aspect of said control signal and move said entire planar member assembly in the y-direction, perpendicular to said longitudinal edge; means for raising and lowering said pen carriage means, in a z direction, in further response to said control signal; wherein further, (b) Said electronics package unit further comprises storing memory means for holding addressable, numerical instructions for a vocabulary of characters, means for receiving a character input from said keyboard means and communicating said input to address means for recalling numerical instructions for each of said characters from said vocabulary, means for converting said recalled numerical instructions into a drawing control signal, said converting means communicating with scale means operable to selectively change the scale of a character representation to be executed by said pen, in response to said drawing control signal and means for conveying said drawing control signal through said functional interconnection and to said keyboard unit for controlling said carriage means in said x, y and z directions.
1. A portable alphanumeric and symbol drafting device comprising a keyboard unit in functional interconnection to an electronics package unit, wherein; (a) Said keyboard unit further comprises a portable housing with a first longitudinal edge, a lower surface adapted to be placed on a drafting surface, and an upper surface which comprises a keyboard means for inputting at least one character or symbol; wherein further a carriage means for supporting a technical drafting pen is operably mounted for longitudinal (x) and transverse (y) movement proximate said first edge of said housing; means to move said pen carriage in said x and y directions in response to a drawing control signal which comprises a planar member having an extending guideway parallel to said longitudinal housing edge, and an x-axis servo motor and encoder assembly mounted thereon which is operable to respond to one aspect of said control signal, and selectively move said drafting pen carriage, superposed upon said planar member, in the x-direction, parallel to said longitudinal edge; wherein further said y-axis control comprises a y-axis dc servo motor and encoder assembly which is mounted to a base reference of said housing and is operable to respond to a second aspect of said control signal and move said entire planar member assembly in the y-direction, perpendicular to said longitudinal edge; means for raising and lowering said pen carriage means, in a z direction, in further response to said control signal; wherein further, (b) Said electronics package unit further comprises storing memory means for holding addressable, numerical instructions for a vocabulary of characters, means for receiving a character input from said keyboard means and communicating said input to address means for recalling numerical instructions for each of said characters from said vocabulary, means for converting said recalled numerical instructions into a drawing control signal, said converting means communicating with scale means operable to selectively change the scale of a character representation to be executed by said pen, in response to said drawing control signal and means for conveying said drawing control signal through said functional interconnection and to said keyboard unit for controlling said carriage means in said x, y and z directions. 6. A portable drafting device according to claim 1, wherein said storing memory means for holding addressable, numerical instructions for a given vocabulary of characters further comprises a read-only memory which is separable from said electronics package unit and replaceable by another read-only memory containing a different vocabulary font.