Patent · US Expired

Key assembly

US4368441A · kind A · utility

0Cited by

3References

8Claims

0Family size

Assignee

Pren Elektrofeinmecahnische Wereke Jakob Preh Nachf. GmbH & Co. · DE

Inventors

Karl-Heinz Bauer · Graben-Neudorf, DE
Gerold Eckert · Bad Neustadt an der Saale, DE
Reinhold Wolf · Bad Neustadt an der Saale, DE

Key dates

Filing date	Apr 16, 1981
Grant date	Jan 11, 1983
Priority date	—
Expiry date	Apr 16, 2001

Classification

Technology area (CPC H)Electricity
CPC primaryH01H13/74
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A key assembly for receivers for communication systems, especially radio television receivers, comprises a casing, keys adapted for mutual release by means of a spring-loaded locking plate for switching in storable, selectively adjustable electrical values of channel memories consisting of a plurality of voltage dividers for variable capacitance diode tuning, rotary and slidable press buttons associated with the respective keys for channel tuning and optionally for selecting a frequency range, which is adjustable in a preferably pressed position of the rotary press button being different from the tuning position by turning into various locking angular positions, as well as a channel and frequency range indicator scale. According to the invention said indicator scale simultaneously is the locking plate for the keys.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.