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Printed Circuit Board Enabling Sequencing of Signals When Inserted Into an Edge Connector

IP.com Disclosure Number: IPCOM000044196D
Original Publication Date: 1984-Nov-01
Included in the Prior Art Database: 2005-Feb-05
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Gerber, JL: AUTHOR [+3]

Abstract

Sequencing of signals through a printed circuit board is obtained without the previously required special edge connectors or additional board manufacturing techniques. A printed circuit board 1 (Fig. 1) has continuous metal fingers 2 and interrupted metal fingers 3 on its upper surface 4. The printed circuit board 1 may have similar continuous metal fingers 5 (Fig. 2) on its bottom surface 6 and interrupted metal fingers, which are similar to the interrupted fingers 3, on its bottom surface 6. Each of the interrupted fingers 3 has a forward portion 7 (see Fig. 1) and a rear portion 8 with a space 9 therebetween. When the printed circuit board 1 is inserted into an edge connector, one contact finger of the edge connector rides up a chamfered edge 10 (see Fig.

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Printed Circuit Board Enabling Sequencing of Signals When Inserted Into an Edge Connector

Sequencing of signals through a printed circuit board is obtained without the previously required special edge connectors or additional board manufacturing techniques. A printed circuit board 1 (Fig. 1) has continuous metal fingers 2 and interrupted metal fingers 3 on its upper surface 4. The printed circuit board 1 may have similar continuous metal fingers 5 (Fig. 2) on its bottom surface 6 and interrupted metal fingers, which are similar to the interrupted fingers 3, on its bottom surface 6. Each of the interrupted fingers 3 has a forward portion 7 (see Fig. 1) and a rear portion 8 with a space 9 therebetween. When the printed circuit board 1 is inserted into an edge connector, one contact finger of the edge connector rides up a chamfered edge 10 (see Fig. 2) of the printed circuit board 1 to engage the forward portion 7 of the interrupted finger 3 and another contact finger of the edge connector rides down a chamfered edge 11 of the printed circuit board 1 to engage the continuous finger 5. With only the rear portion 8 of the interrupted finger 3 having an electrical contact through circuitry on the printed circuit board 1, a signal is initially produced only through the continuous finger 5. Only when the contacting finger on the edge connector engages the rear portion 8 of the interrupted finger 3 is a signal supplied therethrough. This enables some signals to be made pr...