Title of Invention

SINGLE DOOR LOCK FOR RESIDENTIAL PURPOSE

Abstract

A two bolt door lock is disclosed wherein the bolts are transversely disposed and wherein the bolts are disposed one beside the other in the lock position so as to provide a secure locking mode when door mounted and in locked position a vertical bolt is disposed on inside receiving member mounted adjacent to the jamb and horizontal latch bolt is automatically disposed inside the receiving member when the door is shut. Attempts to jimmy, push back the horizontal bolt in its line of least resistance are frustrated by the presence of the vertically locked twin bolt acting against the jimmy and force. The bolts are both operated by single key actuated cylinder and /or hand knob through a common crank mechanism with co-ordinated cam actions. In other embodiments, keys may be employed on both the inside and outside of the door. In further embodiments the vertical deadbolt can be made with single locking or twin locking and operated almost in a similar manner.

Full Text

FORM 2 THE PATENT ACT 1970 (39 of 1970) & The Patents Rules, 2003 COMPLETE SPECIFICATION (See Section 10, and rule 13) 1. TITLE OF INVENTION AN IMPROVED DOOR LOCK 2. APPLICANT (S) a) Name : GODREJ & BOYCE MFG. CO. LTD. b) Nationality- : INDIAN Company c) Address : LOCKS DIVISION (PLANT-18) PIROJSHANAGAR, VIKHROLI, MUMBAI - 400 079 3. PREAMBLE TO THE DESCRIPTION The following specification particularly describes the invention and the manner in which it is to be performed : - INTRABOLT FIELD OF INVENTION This invention relates to a door lock and particularly a door lock of combination bolt type that is a horizontal latch bolt and a vertical deadbolt combination wherein vertical deadbolt can be locked and unlocked by turning only one knob or a key and latch bolt can be unlocked by pulling a puller or a key and locked automatically by the spring force when the door is shut. PRIOR ART Heretofore, it was known to mount several locks having horizontal latch bolt and vertical deadbolt at various places along the side of the door. Each bolt was generally separately actuated by either knob or key. Such bolt combinations require a person to perform several locking or unlocking functions. Also the presence of numerous locks in an effort to provide security presented and aesthetically undesirable appearance. In normal rim locks, the dead bolt and latch bolt are simultaneously actuated by a key or knob. The bolts are both horizontally disposed and reciprocable with the door jamb. Such bolts can be readily circumvented by a crow bar separating a jamb plate from the bolts. Now there is provided by the present invention a high security combination deadbolt and latch bolt wherein dead bolt is vertically disposed adjacent to the jamb on the inside of the door and the latch bolt is horizontally transversely disposed in adjacent the door jamb. Both the bolts are commonly operated by either key on outside and / or a knob / puller handle on inside of the door as well as alternatively another key on the inside of the door. It is therefore, an object of invention to provide a high security lock wherein two bolts are transversely disposed in the locked / unlocked position. It is another object of this invention to provide a lock as aforesaid in which one bolt is vertically disposed on the inside of the door adjacent the jamb and the other bolt is horizontally disposed within the jamb. It is still a further object of this invention to provide a lock as aforesaid which may be actuated by a rotating action of a key on outside of the door. It is still a further object of this invention to provide a lock as aforesaid which may be actuated by a knob and puller handle on the inside of the door and which readily provides the user with an indication of whether the door is locked or unlocked when viewed from a distance. Another object of the invention is to provide a lock as aforesaid which is safe and practical in use and yet is readily fabricated and of readily inexpensive construction, while being aesthetically acceptable when door mounted. Further objects and advantages of the present invention will become apparent from the following description and the accompanying drawings which illustrates certain preferred embodiments and wherein; Fig 1 shows the elevation view of the lock of the present invention. Fig 2 shows the elevation view of the lock of the present invention from back side wherein the back-cover is removed. Fig 3 shows the basic views of the present invention. Fig 4 shows the cross sectional view of the present invention along line AA of Fig 3. Fig 5 shows the elevation view of the lock of present invention wherein latch bolt configuration is shown. Fig 6 shows the shows the elevation view of the lock of present invention wherein dead bolt configuration is shown. Fig 7 shows the exploded view of the present invention. Fig 8a & 8b shows the different views of housing of the present invention. Fig 9 shows the base plate of the present invention. Fig 10 shows the crank follower of the present invention. Fig 11 shows the bolt plate with partial / section view of the present invention. Fig 12 shows the receptacle of the present invention. Fig 13 shows the latch-bolt head assembly of the present invention. Fig 14 shows the back cover of the present invention. Fig 15 shows the dead bolt of the present invention. Fig 16 shows the knob of the present invention. Fig 17 shows the perspective view of another embodiment of the present invention where the key is employed on both the sides. Fig 18 shows the perspective view of the another embodiment of present invention with single locking vertical deadbolt and horizontal latch bolt. Fig 19 shows the perspective view of the another embodiment of present invention with single locking vertical deadbolt and horizontal latch bolt wherein key is employed on both the sides. Fig 20 shows the perspective view of another embodiment of the present invention with double locking vertical deadbolt arrangement only. Fig 21 shows the perspective view of another embodiment of the present invention with double locking vertical deadbolt arrangement only wherein key is employed on both the sides. Fig 21 shows the perspective view of another embodiment of the present invention with single locking vertical deadbolt arrangement only. Fig 21 shows the perspective view of another embodiment of the present invention with single locking vertical deadbolt arrangement only wherein key is employed on both the sides. Referring to Fig 1 to 23, there is shown a lock of the present invention. The lock in a broad aspect comprises of a horizontal latch-bolt assembly designated as (100), a vertical dead-bolt assembly designated as (200) and a key actuated cylinder assembly designated as (300). A torque bar (300A) operably interconnects elements of the assemblies (100 & 200). The horizontal latch-bolt (6) of assembly (100) is transversely disposed to a vertical deadbolt (7) of assembly (200) in the same plane. Assembly (100) comprises a latch-bolt head sub assembly (6), latch bolt pin (4) and puller sub-assembly (5) riveted on the said latch bolt pin, slideable with the housing (1) suitably guided in the backside wall (IN) of the housing, a holder plate (19) slideably inserted into a groove (4A) of a latch bolt pin (4), a puller handle (5) integrally fixed to a said latch bolt pin (4) by a spring dowel (30). A helical spring (24) inserted into the said latch bolt pin (4) biased against a holder plate (19) and rear side wall (IN) of said housing, the said latch bolt head is screwably fitted to the said latch bolt pin by screw means (31), a retainer clip (29) is rotatably pivoted on to the said latch bolt puller (5), which enables the latch bolt to be retained in retracted i.e. unlocked position by anchoring it against the housing rear wall (IN) surface when desired. Sub-assembly (6) further comprises of antifriction bolt (6B) rotateably pivoted into bolt head (6A) through a pin (6C), the said bolt (6) is provided with a hole (6F & 6D) to receive bolt pin (4) and fixing means (31) the said housing is formed with holes (1C, IE, IF, 1H & 1J) to receive lock mounting screws (IB & ID) and knobs spindle (3A & 2A) respectively, it is further provided with cutouts (IK) and a hole (IL) to receive and guide latch bolt assembly, it is further formed with projections (1G & II) to support the back cover. Assembly (200) comprises of a vertical deadbolt (7) slideably connected to a bolt plate (8) through the boss (8B), the said bolt plate is formed with a hole (8A) to receive a crank plate pin (3A), a boss (8C) adapted to be engaged with cutout (IIS) into the base plate, the said plate is further provided with a cut-out (8E) which receives a knob spindle (2A) and guides the deadbolt to move slideably, the said sliding movement is communicated to the said deadbolt which causes transverse movement of the deadbolt in the recess of front side chamber (1A) of housing (1), the said deadbolt plate is provided with a linear slot (7A & 7B) adapted to be engaged with the projections (11A & 11B). A follower (23) having a pin (23A) adapted to be engaged with a cut out (8D) of bolt plate which is inserted into to knob spindle and rotates radially thereby imparting a sliding movement to bolt plate (7) by cam action, the said horizontal to & fro motion is converted into vertically sliding morion of bolt plate (7) by a mutual cam & follower action of the plate (8) and deadbolt plate (7). The said dead bolt plate is suitably guided in the chamber (1A) for vertical movement. The said follower plate (23) is provided with a pin (23B) to receive a spring (18) to retain the follower in respective position, the said follower is provided with a cutout (23C) to receive a extension (16A) of a crank (16) to operably interconnect each other. The dead bolt plate is provided with a cutout (7C) to receive a pin (8B) thereby making it enable to move it vertically, the said dead bolt extends into the recess (IP) of a guide chamber (1A), the said chamber is provided with two transverse recesses (1M, 10) communicating into recesses (IP) adapted to receive the extensions (28A & 28B) of a receptacle (28), the said dead bolt extensions (7D & 7E) get engaged with the recesses into the said extensions of a receptacle. The said receptacle is mounted adjacent to door jamb through the holes (28C through 28H) provided on to it, said receptacle is formed with cutout (281) to receive the latch-bolt, a knob (2) is rotatably mounted in the housing wall (IP) along with a nylon washer (22) and bush (21) to reduce friction and guide the spindle. The above elements are mounted over a base plate (11) on the inside surface of the housing (1), the base plate is further provided with the lances (IIP, 11R, HE & HO) to support the back cover and stop the latch bolt movement when retracted and boss (11M) to receive a spring, hole (11L) and cutout (UK) to receive knob (3) and accommodate pin projection of a cam (15), the plate is further provided with the holes (11C & 11D) to receive the lock mounting screws. The said base plate is provided with a hole (HA) to receive a knob (2), a recess (HI) to pivotably accommodate and guide a pin (13A) holding a driver plate (13). The said base plate is also provided with boss (HF) to pivotably receive a latch release (17). The said base plate is also formed with projections (11G, HQ & 11NJ) to align itself with the internal surface of housing (1). A knob is provided with a recess (2B) and groove (2C) to receive a follower projections (23D & 23E) and circlip (10) respectively. Crank (16) is provided with an extension (16A) which operably engages with a bolt follower (23) and cylindrical projections to each side to rotatably engage into the holes (11C & 12A) provided into base plate (11) and back cover (12) respectively. Latch release (17) is formed with hole (17A) which receives a pin (11F) on base plate and a recess (17B) to receive a knob spindle (2A) when rotated on a pivot. The said release (17) is further formed with an extension (17C) which operably engages with a holder plate (19) connected to the latch pin (4) hereby communicating latch release movement to the latch bolt by cam and follower action. A spacer (20) is inserted on to projection (HF) to maintain a level of latch release (17). A 45° rotation of a knob causes 12mm horizontal displacement of a deadbolt which in turn causes 12mm displacement of a deadbolt. One end of a torque bar (300A) is connected to a locking cylinder assembly (300) and other end is inserted into followers (16) rotatably fitted in between back cover (12) and base plate (11). A locking plate (9) is provided to lock a movement of a deadbolt so that a lock cannot be operated from outside even with its own key, which comprises of a plate (9) having linear cut-outs (9B & 9C) adapted to be engaged with studs (11H & llj) of a base plate (11). The said plate also comprises of a cutout (9A) which receives a pin (15A) of a cam (15) and moves along with it when a cam (15) is rotated by a knob (3). A knob (3) comprises of a spindle (3A) adapted to receive a cut-out (15B) of a cam (15) and rotatably fitted into housing (1). The spacers (25, 26 & 14) are inserted below the lock plate (9) to maintain an alignment of lock plate (9) and cam (15) while in movement. A back cover (12) is fitted on the bosses (11V, 11F, llj) to enclose whole assembly and provide a support to the mechanism during operation by the fixing screw means (27A, 27B & 27C), the said back cover is provided with holes (12B, 12C, 12E) to receive knob spindle and lock mounting screws, it is further provided with holes (12D, 12F & 12G) for accommodating said fixing means. Further embodiments of the present invention will become apparent from the following description and the accompanying drawings which illustrates certain possible variations and wherein Fig. 17, there is a lock shown similar to the invention wherein a key cylinder means are employed on both the sides. In the another embodiment as shown in fig. 18, the lock is provided with a single locking deadbolt and horizontal latchbolt arrangement . In further embodiment as shown in fig. 19, the lock is provided with a single locking deadbolt and horizontal latchbolt arrangement wherein a key cylinder means are employed on both the sides. In still further embodiment as shown in fig. 20, a double locking vertical deadbolt arrangement. In further embodiment as shown in fig. 21, the lock is provided with a double locking deadbolt arrangement wherein a key cylinder means are employed on both the sides. In further embodiment as shown in fig. 22, the lock is provided with a single locking deadbolt arrangement only In further embodiment as shown in fig. 23, the lock is provided with a single locking deadbolt arrangement only and wherein a key cylinder means are employed on both the sides In the aforesaid embodiment, the receptacle is shown as serving both the bolts but separate accurately mounted receptacle plates may be employed for each bolt if desired. It is also within the contemplation of this invention to provide a lock as afore described in which there is a single actuating means such as a knob or key mounted to the inside of the door and wherein the front or outside of the door is blank, so that only a person on inside could actuate the double lock. The person on the outside could only be let in by a person on the inside. It is also within the contemplation of this invention to utilize other type of bolts such as by way of example, latch bolts, automatic deadbolts. In the aforesaid manner of construction and attempted jimming of lock is frustrated insofar as any application of a side to side force is blocked by presence of vertical deadbolt and any application of a front to back force is blocked by the presence of the horizontal bolt i.e. a burglar would attempt to jimmy the horizontal bolt by applying a side to side force to move the receptacle from the bolt. However, with the present construction the vertically disposed bolt locks this action. And a burglar would attempt to jimmy a vertical receptacle by applying front to back force in an attempt to strip the vertical receptacle from the back of jamb. However, with the present construction, the horizontally disposed bolts blocks this action. Thus, the present two co-ordinated and transversely aligned deadbolts and latchbolts are seen to compliment each other in providing jimmy-proof lock. From the foregoing, it will be seen that this invention is one well adapted to attain all of the ends and objects hereinabove set forth, together with other advantages which are obvious and which are inherent in the lock. It will be understood that certain features and sub-combinations are of utility and may be employed without reference to other features and sub combinations. This is contemplated by and is within the scope of the claims. As many possible embodiments may be made of the invention without departing from the scope thereof, it is to be understood that all matter herein set forth or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense. WE CLAIM : 1. A lock comprising a frame portion, deadbolt and latch bolt transversely slideabl with said frame portion means for operably interconnecting said bolts, further comprising means to mount said frame portion to the door and wherein dead bolt is disposed vertically and latch bolt is disposed horizontally when the lock is mounted to the door, said vertically disposed deadbolt being moveable so as to be disposed on a side of the door having a leading portion to engage a receiving member mounted adjacent to door jamb, and horizontally disposed latch bolt having a leading portion to slide into a receiving member, said leading portions of the said bolts being transversely disposed and spaced side by side within the receiving members to provide a locked position and means to actuate the said interconnecting means being mounted more adjacent whereby the actuating means causes the interconnecting means to slide the leading portions of both the bolts from receiving member to unlocked position. 2. As claimed in claim 1, the said bolts are deadbolt and latch bolt. 3. As claimed in claim 2, wherein said interconnecting cylinder means being operably connected to said bolts to cause said bolts to be actuated independently to a locked or unlocked position. 4. As claimed in claim 4, wherein the first actuating means is a key and cylinder. Second actuating means is a knob and 3rd actuating means is a puller. 5. As claimed in claim 1, further comprising a second and third actuating means mounted on a lock body. 6. As claimed in claim 4, the said interconnecting means comprising of a torque bar being connected to said actuating means and one portion of said torque bar being operably mounted to means to operate the deadbolt from locked position to unlocked position and vice versa and to slide a latch bolt from locked position to unlocked position. 7. As claimed in claim 6, said one portion of said torque bar being received in a slot of a crank member rotatably mounted in the housing having a cam surface extending radially from said member wherein said torque bar rotates said member so as to cause sliding of latch bolt or operation of a deadbolt. 8. As claimed in claim 1, wherein actuating means fitted on to lock housing portion is rotated about 45° to operate a deadbolt from unlocked position to locked position or vice versa. 9. As claimed in claim 1, wherein the first actuating means (key & cylinder) is rotated about 360° to dispose the deadbolt and further about 45° to slide a latch bolt to unlocked position. 10. As claimed in claim 1, comprising 3 actuating means, 1 actuating means being mounted to the outside of the door and other means are mounted on the body of the locks which is being mounted on inside of the door, the first actuating means is operably interconnected to second & third actuating means by a crank extension and the inside actuating means (second & third) are operationally independent. ABSTRACT A two bolt door lock is disclosed wherein the bolts are transversely disposed and wherein the bolts are disposed one beside the other in the lock position so as to provide a secure locking mode when door mounted and in locked position a vertical bolt is disposed on inside receiving member mounted adjacent to the jamb and horizontal latch bolt is automatically disposed inside the receiving member when the door is shut. Attempts to jimmy, push back the horizontal bolt in its line of least resistance are frustrated by the presence of the vertically locked twin bolt acting against the jimmy and force. The bolts are both operated by single key actuated cylinder and / or hand knob through a common crank mechanism with co-ordinated cam actions. In other embodiments, keys may be employed on both the inside and outside of the door. In further embodiments the vertical deadbolt can be made with single locking or twin locking and operated almost in a similar manner. To, The Controller of Patents, The Patent Office, Mumbai.

Documents:

318-MUM-2008-ABSTRACT(6-7-2012).pdf

318-mum-2008-abstract.doc

318-mum-2008-abstract.pdf

318-MUM-2008-ABSTRACT12-8-2013).pdf

318-MUM-2008-CANCELLED PAGES(6-7-2012).pdf

318-MUM-2008-CLAIMS(AMENDED)-(12-8-2013).pdf

318-MUM-2008-CLAIMS(AMENDED)-(6-7-2012).pdf

318-mum-2008-claims.doc

318-mum-2008-claims.pdf

318-mum-2008-correspondence(5-3-2008).pdf

318-mum-2008-correspondence-received.pdf

318-mum-2008-description (complete).pdf

318-MUM-2008-DRAWING(6-7-2012).pdf

318-mum-2008-drawings.pdf

318-MUM-2008-FORM 1(12-8-2013).pdf

318-mum-2008-form 18(5-3-2008).pdf

318-MUM-2008-FORM 2(TITLE PAGE)-(12-8-2013).pdf

318-MUM-2008-FORM 26(12-8-2013).pdf

318-mum-2008-form-1.pdf

318-mum-2008-form-2.doc

318-mum-2008-form-2.pdf

318-mum-2008-form-3.pdf

318-mum-2008-form-5.pdf

318-MUM-2008-GENERAL POWER OF ATTORNEY(6-7-2012).pdf

318-MUM-2008-MARKED COPY(12-8-2013).pdf

318-MUM-2008-OTHER DOCUMENT(12-8-2013).pdf

318-MUM-2008-REPLY TO EXAMINATION REPORT(6-7-2012).pdf

318-MUM-2008-REPLY TO HEARING(12-8-2013).pdf

318-MUM-2008-SPECIFICATION(AMENDED)-(12-8-2013).pdf