Patent ID: 7155947

Claim:
A control knob for mounting on a structuring provided with a plurality of holes, the control knob comprising a locking mechanism that is pressure-activated and controlled externally by an operator, the locking mechanism comprising: an axially movable plunger assembly that is aligned with a hub of the control knob, that can be operated with one hand, and that protrudes outward from the control knob; at least one projecting pin carried by the plunger assembly for engaging the plurality of holes; a keylock that is carried by the plunger assembly, the keylock having a latch that can be turned with a key; and a catch in which the latch engages for preventing axial movement of the plunger assembly; wherein when the locking mechanism is activated, the locking mechanism engages the structure on which the control knob is mounted and inhibits rotation of the control knob.