Key holders

Claim 1

IN A KEYHOLDER OF THE TYPE IN WHICH OPPOSITELY DISPOSED PARTS DEFINE A PERIPHERAL CHANNEL AND RADIALLY SURFACED RIMS DEFINE A NARROW, OUTWARDLY OPENING MOUTH FROM SAID CHANNEL, WHEREBY A THIN-NECKED KNOB OF A KEY-RETAINER SUCH AS THE END BALL OF A BALL TYPE CHAIN CAN BE SLIDABLY MOUNTED IN SAID CHANNEL AND RETAINED THEREIN BY SAID RIMS, THE IMPROVEMENT COMPRISING EDGES IN SAID RIMS DEFINING A LATCH-RECEIVING OPENING; A PLUNGER SLIDABLY-MOUNTED WITHIN SAID OPENING, SAID PLUNGER HAVING A HEAD PROJECTING RADIALLY OUTWARDLY BEYOND THE CIRCUMFERENTIAL EDGE OF THE OPEN MOUTH OF SAID CHANNEL AND A FLAT BODY WITH PARALLEL SIDE EDGES RADIALLY WITHIN THE COMPASS OF SAID RIMS; BIASING MEANS BIASING SAID PLUNGER OUTWARDLY WITH RESPECT TO SAID CHANNEL; A SHOUDLER ON SAID PLUNGER, DEFINED BETWEEN SAID HEAD AND SAID BODY, NORMALLY POSITIONED WITHIN SAID OPENING TO BLOCK SAID OPENING BUT MOVABLE WITH SAID PLUNGERR AGAINST THE BIAS OF SAID BIASING MEANS TO UNBLOCK SAID FGI-01 OPENING AND PERMIT FREE ACCESS BETWEEN SAID OPENING AND SAID CHENNEL; GUIDEWAY MEANS WITHIN SAID KEYHOLDER FOR GUIDING SAID PLUNGER AND INCLUDING CHORDAL GUIDEWAY WALLS PARALLEL WITH AND OUTBOARD OF SAID PLUNGER BODY EDGES AND STOP MENS FOR LIMITING THE OUTWARD MOVEMENT OF SID PLUNGER, SAID STOP MEANS INCLUDING A TOOTH PROJECTIONG INBOARDLY WITH RESPECT TO AT LEAST ONE OF SAID GUIDE WAY WALLS BETWEN THE SAID WALLS AND THE LATCH-RECEIVING OPENING, SAID TOOTH MAKING AN ACUTE ANGLE WITH THE ADJACENT GUIDEWAY WALL, AND SAID PLUNGER HAVING AN OUTWARDLY EXTENDING FOOT SHAPED COMPLEMENTARILY TO SAID STOP TOOTH AND PROJECTING OUTBOARDLY TOWARD SAID TOOTH FOR SELECTIVE ENGAGEMENT THEREWITH FROM AN INNER END OF THE EDGE OF SAID PLUNGER BODY.