Panic lock

Claim 1

A PANIC ASSEMBLY FOR ONE SIDE OF A DOOR PROVIDED ON ITS OPPOSITE SIDE WITH A LOCK ASSEMBLY INCLUDING A LATCH AND A ROTATABLE SPINDLE PROJECTING THROUGH THE DOOR TO ACTUATE THE LATCH UPON ROTATION OF THE SPINDLE AND A KNOB MOUNTED ON SAID SPINDLE ON SAID OPPOSITE SIDE OF THE DOOR, COMPRISING: A HOUSING MOUNTED ON SAID ONE SIDE OF THE DOOR HAVING AN APERTURE THROUGH WHICH SAID SPINDLE PROJECTS; LIFTER MEANS INCLUDING A RECIPROCABLE LIFTER SLIDE GUIDABLY MOUNTED FOR VERTICAL SHIFTABLE MOVEMENT WITHIN SAID HOUSING AND A LIFTING LEVER PIVOTALLY MOUNTED IN SAID HOUSING, SAID LEVER HAVING AN END PORTION THEREOF POSITIONED BELOW SAID LIFTER SLIDE, SAID LIFTER SLIDE HAVING A U-SHAPED UPPER END WITH THE BIGHT OF THE U EMBRACING SAID PSINDLE, ONE OF THE ARMS OF SAID U-SHAPED PORTION HAVING A ROLLER PIN PROJECTING LATERALLY THEREFROM; A PLATE-LIKE CAM MEMBER FIXED TO SAID SPINDLE WITHIN THE HOUSING AND PROVIDED WITH A DIAMETRICAL SLOT, WITH SAID ROLLER PIN ENGAGED WITHIN SAID CAM SLOT TO ROTATE THE CAM AND SPINDLE UPON RECIPROCAL MOVEMENT OF SAID LIFTER SLIDE; A PANIC BAR ARM PIVOTALLY MOUNTED ON SAID HOUSING HAVING A PROJECTING NOSE PORTION ENGAGING SAID PIVOTED LIFTING LEVER WHICH IN TURN ENGAGES SAID LIFTER SLIDE TO SHIFT THE LATTER UPON PIVOTAL MOVEMENT OF SAID PANIC BAR ARM; A MANUALLY ACTUATABLE PANIC BAR CONNECTED AT ONE END TO SAID PANIC BAR ARM AND EXTENDING GENERALLY HORIZONTALLY ACROSS SAID ONE SIDE OF THE DOOR SPACED THEREFROM; AND SPRING MEANS OPERATIVELY COUPLED TO SAID LIFTING LEVER BIASING THE LATTER TO A NORMALLY INOPERATIVE AT REST POSITION.