Browse Prior Art Database

Electrical Keyboard without Moving Contacts

IP.com Disclosure Number: IPCOM000095985D
Original Publication Date: 1964-Nov-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 34K

Publishing Venue

IBM

Related People

Quade, EA: AUTHOR

Abstract

In this keyboard a small magnet 12 is connected to each key 11. As a key is depressed, its magnet comes into proximity with a magnetic core 13 that has previously been set by a drive pulse on line 10.

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

Electrical Keyboard without Moving Contacts

In this keyboard a small magnet 12 is connected to each key 11. As a key is depressed, its magnet comes into proximity with a magnetic core 13 that has previously been set by a drive pulse on line 10.

The field from the magnet is sufficient to magnetize the core at right angles to its conventional circular magnetization. Thus, when a second drive pulse is applied to all cores, only this core is switched and emits a pulse on an output winding.

1

Page 2 of 2

2

[This page contains 1 picture or other non-text object]