Air Jet Tester for Keyboards
Original Publication Date: 1984-Sep-01
Included in the Prior Art Database: 2005-Feb-04
A keyboard 1 carrying plural rows of keys 2 in a configuration in which the keys of each row have the same axis of depression, but the axial depression directions of the respective rows are convergent, is tested for correct operation by a processor-controlled tester 3 which includes two pivotally mounted frames 4 and 5 having a common axis of rotation 6, located along the line of intersection of the key depression axes of a keyboard mounted in the tester. The frames extend substantially to the exposed surfaces of the keys and carry air jet nozzles 7. Each nozzle is connected by an individual hose 8, only the end of which of each frame being shown, to a corresponding solenoid-controlled valve 9 connecting, in turn, to a compressed air supply (not shown).