Key detection system interconnecting keyboard and data processin

Details Key detection system interconnecting keyboard and data processin Key detection system interconnecting keyboard and data processin

1975-07-14

1976-08-03

Habecker, Thomas B.

Communications: electrical

Audible indication

Percussion-type sound producer

340365S, G08C 100

Patent

active

039732568

ABSTRACT:
A system is disclosed for scanning a keyboard and detecting any depressed key during each scan cycle, and for filtering out any bounce in key contacts closing and opening with a filtering up-down counter that counts up each scan cycle that the same key is found, down each cycle that a different key is also found or that no key is found, and requiring that the filtering counter reach a selected maximum before finding that a key is depressed and that the filtering counter reach zero before starting to filter another key detected to be depressed.

REFERENCES:
patent: 3825926 (1974-07-01), Brownback

Affiliated with

Also associated with

Rating

Key detection system interconnecting keyboard and data processin does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Key detection system interconnecting keyboard and data processin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Key detection system interconnecting keyboard and data processin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1932660