Mortise lock with latch bolt and locking bolt

Claim 1

A MORTISE LOCK COMPORISING: (A) AN ELONGATED THIN-WALLED LOCK CASING HAVING A FRONT FACE WITH AN OPENING THEREIN; (B) A LOCK AND LATCH BOLT ASSEMBLY DISPOSED WITHIN SAID CASING IN TELESCOPING ENGAGEMENT WITH THE CASING WALL SO THAT IT MAY PROTRUDE THROUGH SAID OPENING WHEN IN LOCKED POSITION, THE LATCH BOLT AND LOCKING BOLT OF SAID ASSEMBLY BEING IN FREELY SLIDING RECIPROCABLE ENGAGEMENT WITH EACH OTHER; (C) THE LATCH BOLT OF SAID ASSEMBLY BEING SPRING-BIASED SO THAT IT NORMALLY PROTRUDES OUT THROUGH SAID OPENING IN SAID FRONT FACE; (D) THE SAID LOCKING BOLT BEING HELD IN WITHDRAWN POSITION BEHIND SAID OPENING OF SAID FRONT FACE, AND BEING FORWARDLY MOVABLE TO EXTENDED LOCKED POSITION THROUGH SAID OPENING IN SAID FRONT FACE; (E) TWO ROTATABLE DRIVE SLEEVE MEMBERS, ONE DISPOSED ON EACH SIDE OF SAID CASING, AND EACH HAVING A PORTION THEREOF WHICH EXTENDS THROUGH THE CASING WALL, THE ROTATION OF SAID PORTION ACTING TO MOVE SAID LATCH BOLT FOR EFFECTING RETRACTION THEREOF; (F) AN ELONGATED ROTATABLE SHAFT MEMBER WHICH EXTENDS TRANSVRSELY THROUGH SAID CASING BEHIND SAID LOCKING BOLT AND INTO EACH OF SAID SLEEVE MEMBERS WHERE EACH END THEREOF IS CONNECTED TO A TURNING MEANS; AND (G) A ROTATABLE LINK MEMBER CONNECTED TO SAID ELONGATED ROTATABLE SHAFT MEMBER AND ROTATABLE THEREWITH, SAID LINK BEING MECHANICALLY CONNECTED TO SAID LOCKING BOLT WHERBY TURNING OF SAID ELONGATED ROTATABLE SHAFT MEMBER IN ONE DIRECTION WILL ROTATE SAID LINK AWAY FROM SAID LOCKING BOLT TO THEREBY MOVE SAID LOCKING BOLT TO WITHDRAWN POSITION, AND REVERSE MOVEMENT OF SAID ELONGATED ROTATABLE SHAFT MEMBER WILL EXTEND SAID LOCKING BOLT TO LOCKED POSITION.