Push-button tuning unit for HF car radio - has single push-button causing tuning members to rotate through set sequence

摘要

The push-switch is mounted on the front of the receiver and is biassed by a spring in an outwards position and operation is effected by pushing in fully, allowing to extend again and repeating this process to change channels. The moving bar part of the switch has recesses and projections which interact with two rotary members. The rotary members have projections which are arranged to enable selective partial rotation of one or both rotary members. Thus, by various combinations, a reasonable large number of different stations may be selected, if the rotary members are attached to tuning elements.