Patent ID: 7722281

Claim:
Device fastening an emitter to a housing; the emitter comprising a chamber containing an electrode source which produces electrons and a window through which the electrons are emitted; the device comprising: a fastening element slidable in a fastening direction; an activating element slidable in the fastening direction; the fastening and activating elements being interconnected via at least one elastic element that is elastic in the fastening direction; the fastening element being movable, in response to displacement of the activating element, between a fastening position in which the fastening element applies a fastening force to the emitter and an open position in which the fastening force is released; and a manoeuvre element slidable in a manoeuvre direction that is inclined in relation to the fastening direction, the manoeuvre element and the activating element being interconnected via at least one cam mechanism such that displacement of the manoeuvre element in the manoeuvre direction causes displacement of the activating element in the fastening direction, and the displacement of the activating element in the fastening direction causing movement of the fastening element in the fastening direction.