Superimposable card system with template and guided drill

Claim 1

APPARATUS FOR SELECTIVELY DRILLING CODE PERFORATIONS IN DATA RECORD CARDS OF THE COORDINATE-INDEX TYPE, COMPRISING A HOUSING HAVING A FLAT UPPER SUPPORT PLATE, DATACARD LOCATING FORMATIONS ON SAID PLATE TO RECEIVE AND MAINTAIN AT LEAST ONE DATA CARD IN FIXED POSITION ABOVE SAID PLATE, SAID SUPPORT PLATE INCLUDING A LATERAL SUBSTANTIALLY COPLANAR EXTENSION DEFINING A TRACKWAY IN SUBSTANTIAL ALIGNMENT WITH A CARD RECEIVED BY SAID FORMATIONS, A TILTABLE ELONGATE ARM ARRANGED OVER SAID SUPPORT PLATE AND SUPPORTED BY A DEPENDING FORMATION RIDING IN SAID TRACKWAY TO PERMIT MOTION OF SAID ARM BOTH IN THE FORE-AND-AFT DIRECTION OF SAID TRACKWAY AND FOR AT LEAST A LIMITED SWINGING MOTION OF SAID ARM IN A PLANE SUBSTANTIALLY PARALLEL TO AND ABOVE SAID SUPPORT PLATE, AND A CARDDRILLING DEVICE SECURED TO ONE END OF SAID ARM SO AS TO OVERLIE THE AREA OF SUCH CARD; SAID DEPENDING FORMATION IN ENGAGEMENT WITH SAID TRACKWAY BEING CONSTRUCTED TO MAINTAIN SAID ARM AGAINST ROTATION ABOUT ITS OWN LENGTHWISE AXIS, WHEREBY THE AXIS OF SAID CARD-DRILLING DEVICE IS MAINTAINED SUBSTANTIALLY PERPENDICULAR TO THE PLANE OF SAID SUPPORT PLATE AND THE CARD THEREON, REGARDLESS OF THE HORIZONTAL POSITIONING OF SAID CARD-DRILLING DEVICE.