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US 4,542,441 AGranted
Card guide
AssigneeUnited Technologies Corporation
InventorFrederick A. Perretta
Life of this patent
Estimating the term…
Abstract
Edge notches of various depths in circuit boards correspond with slots of various depths in a card guide so that the boards are not interchangeable.
Claims1
A ramped card guide for providing fully mutually exclusive insertion of multiple printed circuit boards into the guide, comprising:
- one side having a plurality of slots of progressively varying depth, each slot for receiving one side edge of a circuit board;
- another side having a plurality of slots of reciprocally progressively varying depth, as contrasted with the one side, each slot for receiving the other side edge of the circuit board;
- wherein each circuit board has a unique combination of edge notches of depth corresponding to the respective depths of the slots into which the board is intended to be inserted so that full insertion of all boards is indicated by trailing edge correspondence.
Dependencies are inferred from the claim text.