Work holding attachment for a sewing machine

Claim 1

A SEWING MACHINE COMPRISING A FRAME WITH AN ARM AND A HOLLOW BASE AND A VERTICAL STANDARD CONNECTING THE ARM AND BASE, A DRIVE SHAFT SUPPORTED IN SAID ARM, A NEEDLE BAR EXTENDING DOWNWARDLY FROM SAID ARM, A FEED DOG DISPOSED IN SAID BASE IN VERTICAL ALIGNMENT WITH SAID NEEDLE BAR, FEED DOG OPENING MEANS DISPOSED IN SAID BASE IN ALIGNMENT WITH SAID NEEDLE BAR AND FEED DOG, SAID BASE HAVING AN OPENING DISPOSED IN THE TOP THEREOF NORMALLY CLOSED BY A REMOVABLE PLATE, SAID OPENING BEING SPACED LATERALLY OF SAID FEED DOG OPENING MEANS IN A DIRECTION TOWARD SAID VERTICAL STANDARD, A MOVABLE WORK HOLDER SUPPORT MOUNTED WITHIN SAID BASE IN VERTICAL ALIGNMENT WITH SAID OPENING, ACTUATING MEANS CONNECTED TO SAID DRIVE SHAFT AND DISPOSED WITHIN SAID FRAME AND OPERATING SAID MOVABLE WORK HOLDER SUPPORT IN A TRANSVERSE AND LONGITUDINAL DIRECTION, AND MEANS ON SAID WORK HOLDER SUPPORT FOR DETACHABLY CONNECTING A WORK HOLDER THERETO IN VERTICAL ALIGNMENT WITH SAID NEEDLE BAR AND ABOVE SAID FEED DOG.