Double-lift dobbies

Claim 1

FOR USE IN A LOOM HAVING PATTERN MEANS COMPRISING INSTRUCTIONS CORRESPONDING TO INSTRUCTIONS TO CONTROL A TOP SHED POSITION AND A BOTTOM SHED POSITION, A DOUBLE-LIFT DOBBY COMPRISING A JACK LEVER OPERABLE TO A FIRST AND SECOND OPERATIVE POSITION CORRESPONDING TO POSITIONS FOR EFFECTING CONTROL OF A TOP SHED POSITION AND A BOTTOM SHED POSITION, A BAULK FOR SAID JACK LEVER FOR ACTUATING SAID JACK LEVER TO SAID TWO OPERATIVE POSITIONS AND HAVING TWO OPPOSITE END PORTIONS EACH OPERABLE TO TWO OPERATIVE POSITIONS, PAIRED ARRESTING HOOKS PIVOTALLY MOUNTED FOR SELECTIVELY ARRESTING AND HOLDING A RESPECTIVE END PORTION OF SAID BAULK IN ONE OF SAID POSITIONS AND FOR FREEING SAID END PORTIONS TO ALLOW SAID BAULK TO MOVE TO SAID SECOND OPERATIVE POSITION, CATCH MEANS ON SAID BAULK ENGAGEABLE BY SAID ARRESTING HOOKS FOR ARRESTING SAID BAULK, AND ACTUATION MEANS PIVOTALLY ACTUATING SAID ARRESTING HOOKS TO POSITIONS FOR ENGAGING SAID CATCH MEANS OF A RESPECTIVE BAULK AND FOR CAUSING SAID ARRESTING HOOKS TO FREE SAID CATCH MEANS AS DETERMINED BY SAID PATTERN MEANS, THE IMPROVEMENT WHICH COMPRISES MEANS COOPERATIVE WITH SAID ACTUATION MEANS TO IMPART TO SAID ARRESTING HOOKS AN ADDITIONAL MOVEMENT FROM POSITIONS IN WHICH SAID ACTUATION MEANS POSITIONS SAID ARRESTING HOOKS TO REMOVE CLEARANCE BETWEEN SAID CATCH MEANS AND SAID ARRESTING HOOKS THEREBY TO CARRY OUT A SUBSTANTIALLY JOLT-FREE ENGAGEMENT BETWEEN SAID HOOKS AND SAID CATCH MEANS.