Educational device

Claim 1

A MUSICAL APPARATUS COMPRISING A SELECTOR MEANS HAVING A PANEL WITH A STAFF THEREON, BAR LINE POSITIONING MEANS ALONG SAID STAFF, NOTE BAR RECEPTACLES ALONG SAID LENGTH AND WIDTH OF SAID STAFF PROVIDED BY A PLURALITY OF ROWS OF SLOTS EXTENDING THERETHROUGH AND POSITIONED ON EACH LINE AND SPACE OF SAID STAFF, AND A PLURALITY OF NOTE BARS EACH BEING SELECTIVELY MOUNTABLE ON SAID PANEL HAVING A BASE RECEIVED ON A LINE OR SPACE OF SAID STAFF AND A DEPENDING TAB CARRIED BY SAID BASE RECEIVABLE THROUGH A SELECTED ONE OF SAID SLOTS AND EXTENDING BELOW SAID PANEL; THE LENGTH OF SAID NOTE BARS BEING PROPORTIONAL TO THE TIME COUNT VALUE THEREOF, WHEREBY THE TOTAL LENGTH OF ALL OF SAID NOTE BARS IN A SINGLE BAR OF MUSIC CORRESPONDS TO THE DISTANCE BETWEEN ADJACENT BAR LINES CARRIED UPON SAID PANEL; A SOUND UNIT SUPPORTED FOR MOVEMENT BENEATH SAID PANEL HAVING MEANS FOR SELECTIVELY EMITTING A PLURALITY OF DISCRETE NOTES, ACTUATING MEANS CARRIED BY SAID SOUND UNIT FOR SOUNDING EACH OF SAID DISCRETE NOTES INCLUDING A PRESSURE RESPONSIVE SENSING MEANS HAVING A PLURALITY OF FINGERS IN ALIGNMENT WITH RESPECTIVE ONES OF SAID NOTE BAR RECEPTACLES WITH THE MOVEMENT OF SAID SOUND UNIT BENEATH SAID PANEL ALONG THE LENGTH OF SAID STAFF; SAID SENSING MEANS TRANSMITTING THE ARRANGEMENT OF SAID SELECTOR MEANS TO SAID ACTUATING MEANS IN RESPONSE TO RELATIVE MOVEMENT OF SAID SOUND UNIT AND SAID SELECTOR MEANS BY EACH FINGER OF SAID ACTUATING MEANS BEING ACTUATED IN RESPONSE TO THE PRESENCE OF EXTENDING TABS OF SAID NOTE BARS IN THE PATH OF MOVEMENT OF SAID FINGERS OF SAID SOUND UNIT; AND DRIVE MEANS FOR EFFECTING RELATIVE MOVEMENT BETWEEN SAID SOUND UNIT AND SAID SELECTOR MEANS.