Device for attachment of a recording arm to a drive mechanism with adjustable bias force

Claim 1

IN A RECORDER, THE COMBINATION COMPRISING AN ELONGATED ARM HAVING A RECORDING STYLUS ON ONE END AND A HUB AT THE OTHER END THEREOF, A TRUNNION EXTENDING FROM EACH SIDE OF SAID HUB, A CRADLE RIGIDLY ATTACHED TO A DRIVE MECHANISM AND HAVING TWO UPRIGHT MEMBERS, EACH WITH A V-TYPE BEARING ADAPTED TO RECEIVE A TRUNNION EXTENDING FROM SAID HUB, A COVER PLATE ADAPTED TO CAPTURE SAID HUB IN SAID CRADLE, WITH SAID TRUNNIONS RESTING IN SAID BEARINGS, SAID COVER PLATE HAVING AT LEAST ONE FLAT SPRING CONNECTED TO ONE SIDE THEREOF, WITH SAID SPRING PASSING BETWEEN SAID COVER AND SAID HUB EXTENDING IN A DIRECTION ALONG SAID STYLUS ARM, TWO SUPPORT MEMBERS, EACH DISPOSED ON A DIFFERENT SIDE OF SAID CRADLE PROXIMATE ONE OF SAID V-TYPE BEARINGS AND EACH WITH A MEANS FOR SECURING SAID COVER IN A PROPER POSITION FOR CAPTURING SAID HUB IN SAID CRADLE, ONE OF SAID MEANS COMPRISING A LATCHING PORTION OF A SUPPORT SO FORMED AS TO HOOK OVER A PORTION OF SAID COVER PLATE TO LATCH IT IN SAID PROPER POSITION AGAINST THE FORCE OF SAID SPRING, AND MEANS FOR ADJUSTING THE FORCE OF SAID SPRING AGAINST SAID STYLUS ARM, SAID ADJUSTING MEANS BEING FASTENED TO SAID COVER PLATE, WHEREBY SAID COVER PLATE MAY BE UNLATCHED FOR SAID STYLUS ARM TO BE EASILY REMOVED WITHOUT DISTURBING THE ADJUSTMENT OF SAID FORCE.