GB2385884A

GB2385884A - Mortice lock

Info

Publication number: GB2385884A
Application number: GB0228194A
Authority: GB
Inventors: Jose Maria Graca Dos Santos
Original assignee: SANTOS MANUF Lda
Current assignee: SANTOS MANUF Lda
Priority date: 2002-02-28
Filing date: 2002-12-03
Publication date: 2003-09-03
Anticipated expiration: 2022-12-03
Also published as: GB0228194D0; PT102733A; ES2238126A1; PT102733B; GB2385884B; ES2238126B2

Abstract

A mortice lock which is fitted within a groove in the portion of a door opposite the jambs, is characterised in that the locking bolt can be projected by 20 mm with only one turn of the key in the actuating cylinder, through the inclusion of a bolt pusher and a case whose geometry in the area of contact with the cylinder cam has been designed to permit that function. The case also has the special feature that it has a high resistance to intrusion by means of a lever or crowbar as a consequence of the riveting system used, which comprises 2 square pins (30).

Description

IMPROVED MORTICE LOCK - DESCRIPTION-

Technical field This invention relates to a mortice lock which will be fitted within a groove in the part of a door opposite the jambs.

Background

Previously normal locks projected the bolt through two turns of the key, causing it to advance t : l by a distance of the order of 20 mm.

As the state of the art we refer to a number of patents relating to the device according to this invention.

Patents GB 2360062 and EP 0354634 relate to improvements in lock mechanisms which are designed to prevent the wear or fracture of some of their components.

Purpose This invention is designed to achieve the following aims: Causing the bolt of the lock to project by some 20 mm with only one turn of the key in the cylinder,

Increasing the reliability of the lock, . Reducing wear on the moving components of the lock.

Description of the invention This invention comprises the various normal components of locks of this type, in particular: - a housing, an escutcheon, - a head, - a latch, - a spring, - a case,

- bolt.

The great advantages of the invention in question are on the one hand the fact that it is more functional and convenient for the user, due to the fact that the latter obtains better results with a smaller number of turns when turning the key, and on the other hand because there is less wear of the engaging system for the same number of unlocking and locking movements, because less movement of the case in relation to the tail of the bolt is required for the same amount of movement.

It should also be added that its design is intended to eliminate any risks of jamming during the outward and return movements of the bolt (46) resulting from wear of the components caused by intensive use of the lock, and for this the central tooth of the engaging cases has the special feature of being wider than the side teeth so as to prevent the said jamming, thus conferring greater immobilising resistance upon the lock in its locked position.

Description of the figures The appended drawings show a side view of the lock with the bolt projecting (Figure 1) and with the bolt retracted (Figure 2).

The tail (39) of the bolt is designed to be moved by the pusher (48) which is connected to it by means of a pin (47). The sides of the wards (42) have the special feature that they have a central member which is wider than the side members so as to prevent the lock from sticking or jamming during the outward or return travel.

A projection (41) has the function of moving the activator (35) at the side of the spring away from the radius of action of the cylinder cam effecting the locking motion during the final stage in which the bolt tail assembly moves forward in the locking direction, which is fitted in a hole (54).

The part of the bolt tail (39) which is embedded in the bolt (46) is designed to incorporate 2 hardened pins which act as protection against sawing, and is also fixed by means of 2 rivets (45) which give the assembly much greater strength in comparison with methods of riveting without pins or other forms of attachment which do not use pins.

The mechanism for riveting the case (29) comprises 2 square pins (30) to strengthen resistance against intrusion by means of a lever or crowbar, and its area of contact with the cylinder cam has a geometry which has been designed to cause the bolt to project by 20 mm with only one turn of the key.

The bezel activator (35) is adjusted to the system.

The bezel (20) is designed so that the keyway of the square (21) and the rod spring (23) can operate at 3 separate points of rotation which are co-linear in the vertical direction, keeping the position of the external geometry of the bezel and therefore the angular position of the sides of the lower (26) and upper (27) bezel constant, so that the system always operates in the same way in the 3 positions.

The bezel spring (24) is designed in such a way as to be constantly pressing against the escutcheon fixing pin (7), limiting the load on the bezel (20) in the initial (resting) position,

which makes it possible to unlock the lock easily as rising of the bezel through the action of the said spring detaching it from the lock when the escutcheon is removed, as happens in many conventional locks, is avoided.

The slot (28) of the top side of the bezel (27) has an appropriate geometry to operate correctly in the 3 vertically co-linear positions of the slot of the square (21) and the bezel ring (23).

The latch dampers (17 and 60) have the function of making the end-of-travel impacts of the latch tail (10) gentler, preventing direct shock against the case and the latch pin (14), also eliminating the metallic noise resulting therefrom during the operations of locking and unlocking.

The bezel stop (18) has the function of limiting the bezel (20) in its extreme positions, that is in the resting position with the latch (9) retracted.

It should be pointed out that what has been stated above is merely by way of example, and

the device described may be the subject of improvements and/or changes in relation to tD specific situations without thereby going beyond the scope of the invention submitted for assessment.

Claims

1-Improved mortice lock, characterised in that it projects the bolt of the lock by the order of 20 mm with only one turn of the key in the activating cylinder, through the inclusion of a bolt pusher (48) and a case having a geometry in the contact zone with the cylinder cam which is appropriate to that function, which also has high resistance to intrusion by means of a lever or crowbar due to the riveting mechanism in the case (29) comprising 2 square pins (30).

2-Improved mortice lock according to claim 1, characterised in that its design takes into account the elimination of any risks of jamming during the outward and return movements of the bolt (46) due to wear of the components caused by intensive use of the lock, for which the central tooth of the engaging cases has the special feature of being wider than the side teeth so as to prevent the said jamming, thus also conferring greater immobilising resistance on the lock.

3-Improved mortice lock according to claim 1, characterised in that the portion embedded in the bolt (46) is designed to incorporate two hardened pins for protection against sawing, and is also fixed by means of 2 rivets (45) conferring greater strength upon the assembly than in methods of riveting without pins or other forms of attachment which do not use pins.

4-Improved mortice lock according to the foregoing claim, characterised in that the bezel (20) is prepared so that the square tail (21) and the rod spring (23) can operate at 3 separate points of rotation which are vertically co-linear, maintaining the position of the external geometry of the bezel and consequently the angular position of the sides (26) constant, so that the system therefore operates in an identical way in the 3 positions.

5. The mortice lock according to Claim 1, characterised in that a bezel spring (24) is designed so as to be constantly under load against an escutcheon

fixing pin (7), reducing the load on the bezel in the initial (resting) position, which makes it possible to unlock the lock easily as it prevents the bezel (20) from rising through the action of the aforesaid spring detaching itself from the lock when the escutcheon is removed.

5-Improved mortice lock according to claim 4, characterised in that the tail (28) of the top side of the bezel (27) has a geometry appropriate to operate in the 3 vertical positions of the tail of the square (21) and the spring (23) on the same side of the bezel (27).

6-Improved mortice lock according to claim 1, characterised in that the bezel spring (24) is designed so as to be constantly under load against the escutcheon fixing pin (7), reducing the load on the bezel in the initial (resting) position, which makes it possible to unlock the lock easily as it prevents the bezel from rising through the action of the aforesaid spring detaching itself from the lock when the escutcheon is removed.

Amendments to the claims have been filed as follows 1. A mortice lock comprising a bolt (46), a bolt tail (39), a bolt pusher (48) and a lever (29), the lever (29) being configured to be operated with a cylinder cam and the lever (29) comprising two square pins (34) which provide resistance to intrusion, characterised in that the bolt tail (39) has a central tooth (42a) which is wider than side teeth (42b) in order to prevent jamming and wherein the bolt (46) of the lock is projected by up to 20mm with only one turn of the key within the actuating cylinder.

2. The mortice lock according to Claim 1, characterised in that the bolt (46) is designed to incorporate two hardened pins (44) for protection against sawing, and is also fixed by means of two rivets (45) thereby conferring greater strength upon the assembly.

3. The mortice lock according to Claim 1 or Claim 2, further comprising a bezel (20) which is constructed with a square bolt (21), a rod spring (23) which can operate at three separate points of rotation which are vertically co-linear, maintaining the position of the external geometry of the bezel and consequently the angular position of the sides (26 and 27) constant, so that the system therefore operates in an identical way in the three positions.

4. The mortice lock according to Claim 3, characterised in that the tail (28) of the top side of the bezel (27) has a geometry appropriate to operate in the three vertical positions of the tail of the square bolt (21) and the rod spring (23) on the same side of the bezel (27).