SCREENED KEYBOARD Russian patent published in 1995 - IPC

FIELD: technical physics. SUBSTANCE: in a keyboard each push-button is provided with rod 8 of rectangular cross-section. Rod 8 has key 13 at one end of it and damper 10 at the other end. The damper is supported by contacting pair 11 of the push-button. Rod 8 extends through openings formed in guide plate 4 and screen plate 1. The opening of the guide plate is rectangular in cross section to ensure the push-button operating without cranking. Screen plate 1 is rigidly secured over the perimeter of metallic case 2 through semitombac gasket 3. Thus in the keyboard achieved is reliable screening and electrical isolation from electromagnetic field induced within the case and screening plate 1. EFFECT: enhanced safety of use. 2 dwg