Browse Prior Art Database

Off Center Drill

IP.com Disclosure Number: IPCOM000094450D
Original Publication Date: 1965-Jan-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 75K

Publishing Venue

IBM

Related People

Schick, HC: AUTHOR

Abstract

A card 1, having uniformly spaced holes 2 with a plating of electrically conductive material 3 on their surfaces and connected by printed conductors 4, is used in forming circuits for machines. By breaking connections between different conductors 4 and the plating around adjacent holes, it is possible to establish desired circuits.

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Off Center Drill

A card 1, having uniformly spaced holes 2 with a plating of electrically conductive material 3 on their surfaces and connected by printed conductors 4, is used in forming circuits for machines. By breaking connections between different conductors 4 and the plating around adjacent holes, it is possible to establish desired circuits.

For breaking connections between the conductors and the plating at the holes, there is provided a rod 5 which is rotatable and longitudinally movable within a bore formed slightly off center in guide member 6. Extending axially from the end of guide 6 is reduced portion 7 which fits into any one of holes 2. Fixed to the end of rod 5 is drill 8 partially received within slot 9 in portion 7. As the rod is rotated, the drill is guided by member 7 so that it cuts away a portion of plating 3 and conductor 4 for breaking the connection at that point.

To locate guide 6 and hold it in position during the drilling operation, there is provided a block 10 carrying pins 11. These are receivable in holes 2 when portion 7 of guide member 6 is in alignment with a hole where connections are to be broken. Guide 4 fits within a bore in block 10. Screw 12 engages a slot in guide 6 for holding the latter in the desired angular position.

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