Center case assembly, and a universal, center case sub-assembly

A universal, center case sub-assembly, for a panic-type exit device, comprising:

• first means defining a chassis;
• second means defining a center case housing coupled to said chassis;
• a main control link;
• said housing and link having means cooperating for guiding said link for slidable translation thereof within said housing between first and second dispositions;
• and
• a pair of bellcranks of generally V-shaped configuration, each thereof having a pair of limbs mutually diverging, to terminal limb ends, from a common, angular juncture;
• wherein
• each of said bellcranks has one of said terminal limb ends thereof pivotably mounted to one of said first and second means;
• each of said bellcranks has the other of said terminal limb ends thereof engaged with said link (a) for pivotable movement thereof coincident with, and as a consequence of translation of said link, and (b) for translation of said link concident with, and as a consequence of, bellcrank pivotable movement;
• said chassis has means on opposite sides of said housing defining guideways for movable thumbpiece lifts;
• said common, angular junctures of said bellcranks each have means for coupling thereof to a thumbpiece lift, and each said juncture, with bellcrank pivotable movement, slues through an arc, of a given radius, toward and away from that one of said guideways which is most proximate thereto;
• said control link has (a) means at one end for attachment thereof to a control link translating mechanism of a panic-type exit device, and (b) means at the opposite end thereof for coupling thereto a latchbolt link;
• and
• said housing has means for pinning a latchbolt, pivotably, thereto.