Card keying device

DETAILED DESCRIPTION A male-female keying device for uniquely pairing circuit cards and a connector.
The keying code can be altered.
An elongated pin at each end of the device acts as a guide for ease in assembling the male and female parts.
A plurality of aligned holes is provided in both elongated strips of the device.
Plural pins are inserted in selected holes of the male part, projecting from these holes.
Plural short pins are inserted in all but the selected holes in the female part, being flush with the surface of the strip.
Thus, only two parts with the same keying code can be fitted together.
A large variety of keying codes can be selected for different pairs of the male-female keying device.
If it is desired that any code be changed, this is accomplished by merely changing the hole positions of the male projecting pins and the female flush pins in the elongated strips.
Somewhat tapered extra length male pins are preferably employed at opposite ends of the strip to act as guides for mating the strips.