Patent ID: 8022318

Claim:
An arrangement for the handling of one or more removable controls for a device including the installation and removal of controls from a housing portion of the device; the arrangement comprising: each removable control being disposed within the housing and having an associated drive plunger, the housing having a cover plate formed with an access aperture having a latch slot and a detent slot for each removable control, and a spring biasing the drive plunger; and an operating member adapted to engage a drive plunger of a removable control to be installed or removed, the operating member engaging the drive plunger via the access aperture with a key portion of the operating member being received within the latch slot and axially displacing the drive plunger against bias force of the spring, the operating member being rotatable with the drive plunger to engage the key portion with the detent slot under bias force of the spring thereby locking the operating member with the removable control.