Keyboard lock

Claim 1

A KEYBOARD ARRANGEMENT COMPRISING, IN COMBINATION, A PLURALITY OF KEYS EXTENDING SPACED FROM AND SUBSTANTIALLY PARALLEL TO EACH OTHER AND BEING EACH TILTABLE FROM A REST POSITION TO A DOWNWARDLY INCLINED ACTIVE POSITION AND VICE VERSA; AN ELONGATED BLOCK HAVING A TOP FACE AND A BOTTOM FACE AND EXTENDING TRANSVERSELY TO AND BENEATH SAID PLURALITY OF KEYS, SAID BLOCK BEING FORMED WITH A PLURALITY OF SLOTS EXTENDING IN DIRECTION OF SAID KEYS AND RESPECTIVELY ALIGNED THEREWITH FROM SAID TOP TOWARD BUT SHORT OF SAID BOTTOM FACE OF SAID BLOCK FOR GUIDING SAID KEYS RESPECTIVELY DURING TILTING BETWEEN SAID POSITIONS THEREOF AND WITH AN ELONGATED SLOT EXTENDING IN DIRECTION OF ELONGATION OF SAID BLOCK FROM ONE TO THE OTHER END THEREOF SO AS TO FORM TWO ROWS OF TEETH WITH THE TEETH IN EACH ROW RESPECTIVELY LOCATED ON OPPOSITE SIDES OF SAID KEYS AND THE TEETH IN SAID TWO ROWS ALIGNED IN PAIRS WITH EACH OTHER; AN ELONGATED FLEXIBLE AND SUBSTANTIALLY NON-STRETCHABLE MEMBER EXTENDING IN SAID ELONGATED SLOT TRANSVERSELY TO SAID KEYS BENEATH THE SAME; A PLURALITY OF SUPPORT PINS RESPECTIVELY FIXED AT OPPOSITE ENDS THEREOF TO ALIGNED TEETH IN SAID TWO ROWS BENEATH THE TOP FACE OF SAID BLOCK AND EXTENDING TRANSVERSE TO SAID ELONGATED FLEXIBLE MEMBER FOR SUPPORTING THE SAME IN SAID ELONGATED SLOT BENEATH THE TOP FACE OF SAID BLOCK AND IN ENGAGEMENT WITH BOTTOM EDGE FACES OF SAID KEYS SO THAT DURING TILTING OF ANY ONE KEY FROM SAID REST TO SAID ACTIVE POSITION THEREOF A PORTION OF SAID ELONGATED FLEXIBLE MEMBER ENGAGED BY SAID EDGE FACE OF SAID ONE KEY AND HAVING A LENGTH SUBSTANTIALLY EQUAL TO TWICE THE TRAVEL OF THE ENGAGING EDGE FACE PORTION WILL BE PULLED BETWEEN THE SUPPORT PINS ADJACENT SAID ONE KEY WHILE SHIFTING OF SAID ELONGATED FLEXIBLE MEMBER IN DIRECTION TRANSVERSE TO ITS ELONGATION WILL BE PREVENTED DURING TILTING OF SAID ONE KEY; MEANS OPERATIVELY CONNECTED TO ONE END OF SAID FLEXIBLE MEMBER FOR HOLDING SAID ONE END IN FIXED POSITION ONTO ONE END OF SAID ELONGATED BLOCK; AND MEANS OPERATIVELY CONNECTED TO THE OTHER END OF SAID FLEXIBLE MEMBER FOR LIMITING THE MOVEMENT OF SAID OTHER TOWARD SAID ONE END TO THE LENGTH OF SAID DEFLECTED PORTION SO THAT WHEN ONE OF SAID KEYS IS TILTED FROM SAID REST TO SAID ACTIVE POSITION THEREOF ALL OF THE OTHER KEYS WILL BE PREVENTED FROM BEING MOVED TO THE ACTIVE POSITION THEREOF.