Control keyboard with switches of mechanical constructions

Details Control keyboard with switches of mechanical constructions Control keyboard with switches of mechanical constructions

1979-04-03

1981-09-08

Robinson, Thomas A.

Communications: electrical

Audible indication

Percussion-type sound producer

200 16D, G06F 302

Patent

active

042887879

ABSTRACT:
A keyboard wherein each key is provided with a biasing means for urging the same back to a rest position and is operatively coupled to at least one single-pole switch, the switches being electrically connected to a system of conductors arranged in matrix configuration with m rows and n columns. Each row and each column consists of a conductor whereby a switch of i, j co-ordinates is connected between the row i and the column j of the system. The switches have normally closed contacts and a diode is connected in series with each switch and each series connection of a diode with a switch of i, j co-ordinates is connected between the row i conductor and the column j conductor of the system, the connecting direction of the diodes being the same between rows and columns.

REFERENCES:
patent: 4012608 (1977-03-01), Lockard
patent: 4145687 (1979-03-01), Masuda

Affiliated with

Also associated with

Rating

Control keyboard with switches of mechanical constructions does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Control keyboard with switches of mechanical constructions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control keyboard with switches of mechanical constructions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1195071