Force measuring apparatus

Force measuring apparatus, comprising:

• a. a balance beam (1);
• b. means (49,48,43,41) for applying a force to be measured to the balance beam;
• c. counterweight means (38) operable to apply a balancing force to the balance beam in opposition to the force to be measured;
• d. means (20, 21-29,33) for operating the counterweight means to vary the force thereof;
• e. means (45 or 51,67,72) responsive to the position of the beam within a predetermined control range for producing a first digital signal representative of the load indicated by that position;
• f. means (68,75,81,82;
• 71,84,87,89;
• and 31) responsive to movement of the beam to a limit of that range for driving the counterweight operating means in a sense tending to restore the beam to a position within that range;
• g. means (95,102) actuated concurrently with the counterweight operating means for producing a second digital signal representative of the increment of force due to a change in the counterweight means;
• h. means (72) for adding said first and second digital signals;
• and
• i. display means (73) for indicating the output of the adding means.