Browse Prior Art Database

Reed Switch Logic Elements

IP.com Disclosure Number: IPCOM000097468D
Original Publication Date: 1962-Dec-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 26K

Publishing Venue

IBM

Related People

Leary, TG: AUTHOR

Abstract

Reed switches in combination with a permanent magnet and coil form a bistable device. Permanent magnet 1 creates a magnetic field which biases reed switch 2 with a first polarity and reed switch 3 with a second, opposite polarity. Passing a current pulse through coil 4 creates a transient field. This enhances the field across either switch 2 or 3, depending upon the direction of current flow.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

Reed Switch Logic Elements

Reed switches in combination with a permanent magnet and coil form a bistable device. Permanent magnet 1 creates a magnetic field which biases reed switch 2 with a first polarity and reed switch 3 with a second, opposite polarity. Passing a current pulse through coil 4 creates a transient field. This enhances the field across either switch 2 or 3, depending upon the direction of current flow.

The enhanced field is sufficient to cause the selected switch to make contact. The permanent magnet is sufficient to hold the switch energized after the current pulse has died away. A current pulse of opposite polarity enhances the field across the other reed switch causing it to make contact. At the same time, the field across the first switch is reduced to the point where the contacts open.

1

Page 2 of 2

2

[This page contains 2 pictures or other non-text objects]