Digital display measuring apparatus

A digital display measuring apparatus including:

• a probe which is movably installed to the body and brought in contact with the object to be measured;
• an encoder which converts a displacing amount of said probe into electric signal pulse to output therefrom;
• a presetting device which establishes as a preset value the measuring standard value in accordance with the object to be measured;
• a counter which counts said preset value and said electric signal pulse;
• and
• a digital display unit which displays in digital representation the measured value of the object in accordance with the counted value;
• wherein said presetting device comprises:
• a preset switch which is operated for the establishment of preset value, said preset switch comprises:
• a preset value display circuit which calls to display the preset value in the preset memory on the digital display unit by the call touch operation of said preset switch;
• a cursor display circuit which displays a cursor at any display digit of said digital display unit and moves the cursor display digit one after another by means of the continuous touch operation of the present switch for a certain time for the movement of the cursor;
• a convertor which advances and converts the cursor display digit of the displayed preset value on the digital display unit by means of the advance touch operation of the preset switch;
• and
• an establishing circuit which establishes as the new preset value the preset value after the conversion by means of the establishing touch operation of the preset switch after the completion of a series of conveting operation of the preset value displayed on the digital display unit;
• and
• a preset memory in which an optional numerical value displayed on the digital display unit is established as the preset value by the operation of said preset switch;
• whereby the preset value corresponding to the object to be measured can be established by a series of combined operation in accordance with the predetermined time sequence of the preset switch.