Function of the card:
Positive Binary Trigger Card 1
Alloy – Binary Trigger, P Type – Card #One
Part number: 371413
Used in: 7030, IBM 7090
IBM Standard Modular System, Component Circuits, pp106,107
Drawing courtesy of Living Computers: Museum + Lab
The information on these pages comes from a variety of sources, especially old IBM documents on bitsavers.org, as well as information from the IBM 1401 restoration team, especially Tim Coslet's SMS data and Jim Hunt's data. Much of this information was obtained through OCR, so don't expect complete accuracy. These pages are not associated with IBM in any way.