Patent EA-002680-B1 (EA)
Title: Mortise lock
Inventor: ROFKIN ELI
IPC: E05C9/20
Filed: 1999-05-24
Abstract: 1. A mortise lock (10) comprising: a mortise lock case (12) which houses a locking mechanism actuable by a keyoperated lock cylinder (14), and separately by a handle (16) which engages a bolt follower (19) in operative connection with said locking mechanism, characterized in that said mortise lock (10) comprises a plurality of locking bolts (20,22, 24, 26, 30, 32, 34) which are arranged to protrude outwards from said case (12), and wherein said handle (16) is operatively linked to said plurality of locking bolts (20,22, 24, 26, 30, 32, 34) by a linkage wherein said plurality of locking bolts (20,22, 24, 26, 30, 32, 34) are actuable into an unlocked position by suitable rotation of said handle (16) independently of whether or not the mortise lock (10) is locked by said key-operated lock cylinder (14). 2. The mortise lock (10) according to claim 1 further characterized in that said handle (16) is selectively decouplable from at least one of said plurality of locking bolts (20,22, 24, 26, 30, 32, 34), wherein when said handle (16) is not coupled to said at least one of said plurality of locking bolts (20,22, 24, 26, 30, 32, 34), said at least one of said plurality of locking bolts (20,22, 24, 26, 30, 32, 34) is actuable into said unlocked position only by operation of said key-operated lock cylinder (14). 3. The mortise lock (10) according to claim 1 further characterized in that said handle (16) is selectively decouplable from at least one of said plurality of locking bolts (20,22, 24, 26, 30, 32, 34) without disassembling said case (12). 4. The mortise lock (10) according to claim 1 further characterized in that said plurality of locking bolts (20,22, 24, 26, 30, 32, 34) are selectably couplable to and decouplable from the locking mechanism without disassembling said case (12). 5. The mortise lock (10) according to claim 1 further characterized in that said locking bolts (20,22, 24, 26, 30, 32, 34) are modularly installable in said case (12) without disassembling said case (12). 6. The mortise lock (10) according to claim 1 further characterized in that said plurality of locking bolts (20,22, 24, 26, 30, 32, 34) comprises a latch bolt (20, 22), a bolt (24) and a dead bolt latch (26) which acre configured to protrude from a faceplate (28) of said case (12), at least one first locking bolt (30, 32) arranged to move generally vertically, and at least one second locking bolt (34) arranged to move generally horizontally. 7. The mortise lock (10) according to claim 1 further characterized in that said lock (10) comprises a toggle (36) which is mechanically linked to said bolt follower (19), wherein suitable rotation of said toggle (36) selectively couples or decouples said bolt follower (19) from the locking mechanism. 8. The mortise lock (10) according to claim 6 further characterized in that said locking mechanism comprises a bolt-throw wheel (40) mechanically linked to said bolt (24), said dead bolt hatch (26), said at least one locking bolt (30, 32) and said other locking bolt (34), wherein suitable rotation of said bolt-throw wheel (40) brings said bolt (24), said dead bolt latch (26), said at least one locking bolt (30, 32) and said other locking bolt (34) into an unlocked position; wherein said suitable rotation of said bolt-throw wheel (40) is imparted by suitable operational rotation of said lock cylinder (14) which meshes with said bolt-throw wheel (40) via a spur gear (42); and wherein said bolt follower (19) is arranged to push against a latch follower (106) which meshes with a gear wheel (38), said gear wheel (38) being selectively linked with said bolt-throw wheel (40), such that when said gear wheel (38) is linked with said bolt-throw wheel (40), partial rotation of said handle (16), independent of said suitable operational rotation of said lock cylinder (14), imparts said suitable rotation of said bolt-throw wheel (40) via said bolt follower (19), said latch follower (106) and said toothed arm (110), so as to bring said bolt (24), said dead bolt latch (26), said at least one first and second locking bolts (30, 32, 34) into said unlocked position. 9. The mortise lock (10) according to claim 6 further characterized in that said locking mechanism comprises a bolt-throw wheel (40) mechanically linked to said bolt (24), said dead bolt latch (26), said at least one locking bolt (30, 32) and said other locking bolt (34), wherein suitable rotation of said bolt-throw wheel (40) brings said bolt (24), said dead bolt latch (26), said at least one locking boil (30, 32) and said other locking bolt (34) into an unlocked position; wherein said suitable rotation of said bolt-throw wheel (40) is imparted by suitable operational rotation of said lock cylinder (14) which meshes with said bolt-throw wheel (40) via a spur gear (42); and wherein said bolt follower (19) comprises a cam (104) which is arranged to push against a latch follower (106) which comprises a toothed arm (110) which meshes with a gear wheel (38), said gear wheel (38) being selectively linked with said boltthrow wheel (40), such that when said gear wheel (38) is linked with said bolt-throw wheel (40), partial rotation of said handle (16), independent old said suitable operational rotation of said lock cylinder (14), imparts said suitable rotation of said bolt-throw wheel (40) via said bolt follower (19), said latch follower (106) and said toothed arm (110), so as to bring said bolt (24), said dead bolt latch (26), said at least one first and second locking bolts (30, 32, 34) into said unlocked position. 10. The mortise lock (l0) according to claim 9 further characterized in that said bolt-throw wheel (40) has a radial groove (44) formed therein which receives therein a pin (46) attached to a corresponding one of said locking bolts (24, 30, 32, 34), wherein said suitable rotation of said bolt-throw wheel (40) causes said pins (46) to move radially inwards in said grooves (44) so as to bring said bolt (24), said dead bolt latch (26), said at least one locking bolt (30, 32) and said other locking bolt (34) into an unlocked position. 11. The mortise lock (10) according to claim 8 further characterized in that said gear wheel (38) is generally coaxial with said bolt-throw wheel (40). 12. The mortise lock (10) according to claim 1 further characterized in that said latch bolt (20, 22) is attached to a support member (52) which engages a latch lever (60), and wherein a first pin (62) is fixedly attached to said latch lever (60), and wherein said bolt-throw wheel (40) has a hooked recess (66) formed therein configured to engage said first pin (62), wherein suitable operational rotation of said lock cylinder (14) causes said bout-throw wheel (40) to rotate, thereby causing said hooked recess (66) to engage said first pin (62), thereby causing said latch lever (60) to move, and thereby causing said support member (52) to move and bring said latch bolt (20, 22) into an unlocked position; and wherein said bolt follower (19) comprises a cam (104) which is arranged to push against a latch follower (106) which comprises a toothed arm (110), a pin (114) being fixed to said toothed arm (110), wherein suitable rotation of said handle (16) causes said cam (104) to push said latch follower (106), thereby causing said pin (114) to move said latch lever (60), and thereby causing said support member (52) to move and bring said latch bolt (20, 22) into said unlocked position. 13. The mortise lock (10) according to claim 9 further characterized in that said gear wheel (38) has an arcuate groove (126) formed therein and a pin (122) radially protrudes outwards from a threaded fastener (124) which is threaded into a hub (125) about which said bolt-throw wheel (40) is firmly mounted, wherein by suitable turning of said :fastener (124), said pin (122) can be moved in or out of said arcuate groove (126); wherein when said pin (122) is positioned in said groove (126), rotation of said handle (16) causes rotation of both said gear wheel (38) and said bolt-throw wheel (40) together, and when said pin (122) is not positioned in said groove (126), said bolt-throw wheel (40) is decoupled from said gear wheel (38). 14. The mortise lock (10) according to claim 1 further characterized in that said latch bolt (20, 22) is attached to a support member (52) which engages a latch lever (60), and wherein a first pin (62) and a second pin (64) are fixedly attached to said latch lever (60), and wherein said bolt-throw wheel (40) has a hooked recess (66) formed therein configured to engage said first pin (62), wherein suitable operational rotation of said lock cylinder (14) causes said bolt-throw wheel (40) to rotate, thereby causing said hooked recess (66) to engage said first pin (62), thereby causing said latch lever (60) to move, and thereby causing said support member (52) to move and bring said latch bolt (20, 22) into an unlocked position; and wherein said dead bolt latch (26) comprises a tongue (70) arranged to abut against an arresting lever (72), said arresting lever (72) being pivoted about a pivot (76) and comprising a stopping face (78), wherein when said tongue (70) abuts against said arresting lever (72), said arresting lever (72) is pivoted such that said second pin (64) does not abut against said stopping face (78), and wherein when acid tongue (70) does not abut against said arresting lever (72), said arresting lever (72) is pivoted such that said second pin (64) abuts against said stopping face (78), thereby arresting movement of said latch lever (60). 15. The mortise lock (10) according to claim 14 further characterized in that said bolt-throw wheel (40) is formed with a cam surface (71) which extends radially outwards from a perimeter of said bolt-throw wheel (40), and said arresting lever (72) is provided with a third pin (73) which extends towards said bolt-throw wheel (40), said bolt-throw wheel (40) being configured such that before said hooked recess (66) abuts against said