|Title of Invention||
CROSS BOLT DOOR LOCK
|Abstract||A two dead bolt door lock is disclosed wherein the bolts are transversely disposed and wherein the bolts are disposed one behind the other in the locked position so as to provide a secure locking mode. When door mounted, and in the locked position, a vertical bolts is disposed on the inside of the door adjacent the jamb and a horizontal bolts is mounted in the jamb. Attempts to jimmy the horizontal bolt in its line of least resistance are frustrated by the presence of the vertically locked bolt acting against the jimmying force. The locks are both operated by a single key actuated cylinder and/or hand knob through a common connection rod with coordinated cam actions.|
|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 CROSS BOLT DOOR LOCK
GODREJ & BOYCE MFG. CO. LTD.
LOCKS DIVISION PLANT-18
MUMBAI - 400 079 MAHARASHTRA/A,
PREAMBLE TO THE DESCRIPTION
The following specification particularly describes the invention and the manner in which it is to be performed : -
PRIOR ART (BACKGROUND OF THE INVENTION)
This invention relates to door lock and more particularly door lock of dead bolt type which can be locked and unlocked by turning only one knob or key. Heretofore it was known to mount several locks having latch bolts or dead bolts at various places along the side of the door. Each bolt was generally separately actuated by either a knob or key. Such bolt combinations required person to perform several locking or unlocking functions. Also, the presence of numerous locks in an effort to provide security, presented an aesthetically undesirable appearance.
In normal locks, a dead bolt and the latch bolt are simulatenously actuated by a key or knob. The bolts are both horizontally disposed and reciprocable with the door jamb. Such bolts could be readily circumvented by a crow bar separating the jamb plate from the bolt. It is therefore an object of this invention to provide a high security lock wherein two deadbolts are transversely disposed one behind the other in the locked position.
It is another object of this invention to provide a lock as aforesaid in which the two bolts are commonly operated by a single actuating means.
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 the further object of this invention to provide a lock as aforesaid which may be actuated by a single rotating action on either the inside or outside of the door.
Another object of this invention 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.
BRIEF DESCRIPTION OF THE DRAWING
Further objects and advantages of this invention will become apparent from the
following description and the accompanying drawings which illustrates certain
preferred embodiments and wherein;
FIG 1 : Shows the rear perspective view of the lock of present invention
FIG 2 : Shows the front perspective view of the lock of present invention
FIG 3 : Shows the elevation view of the lock of present invention.
FIG 4 : Shows the sectional view along the line A-A of Fig 3 of the lock of
present invention when door mounted.
FIG 5 : Shows the exploded view of the lock of present invention.
FIG 6 : Shows the perspective view of the locking cylinder.
FIG 7 : Shows the exploded view of the knob of present invention.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Referring to Fig 1 to 6, there is shown a lock of present invention generally designated as 100, lock (100) in a broad aspect comprises a horizontal dead bolt assembly (20), a vertical dead bolt assembly (30), a key actuated cylinder assembly (generally Godrej make Mortise locking cylinder) (40) having a square torque bar, rotating crank arrangement which operably interconnects elements of assemblies (20 & 30). The horizontal dead bolt (6) of assembly (20) is disposed in front of the vertical deadbolt (16) of assembly (30) and the axis 'A' of horizontal bolt (6) (see fig-1) is transversely disposed to axis 'B' of vertical deadbolt (16).
Assembly (30) comprises a housing (10), vertical deadbolt (16) slideable with
housing (10) cam actuated pivoted slide (14), cam (15), backplate (19), and cam
actuating knob (9). Knob (9) is rotatably mounted in housing (10). The above
elements are mounted on a mounting plate (21), on the inside surface of the door by
screws (18). A striker box (20) accommodating both bolts (6 &16) is mounted on
door jamb. Elements (9, 10, 16, 19, 14, 15) are similar in construction to the
elements of well known M/s. Godrej Lock Manufacturing Company, Mumbai, called Vertibolt Patent No. 196644 :
Cam (15) is formed with cylindrical portion which slideably engages surface (9a) of knob (9) which is rotatably mounted in hole (10a) of housing (10). The flanges (15a) and (15b) extends radially outwardly from formed portion (15c), to engage a slider (14) so as to actuate slider (14) for movement of slider (14) and bolt (16), the latter movement being in well known manner. Knob (9) is formed with a central longitudinal square hole (9b) for slideably receiving square torque bar (26) causes a 180° rotation of cam (15) in turn causing bolt (16) to move from housing (10) into members (20a & 20b) of striker box (20), thereof to effect vertical bolt locking.
One end of torque bar, is rotatably housed in locking cylinder (27) to be actuated thereby and the other end is housed in a square hole (9b) formed into knob (9b) to be actuated thereby. That is an approximate 180° rotation of torque bar and in turn locking or unlocking of bolt (16).
Horizontal bolt assembly (20) comprises lock housing (1) with horizontal dead bolt (6) slideably mounted therein and in turn mounted within a door (22) by screws (23) on the side (24) of door (22). Horizontal bolt assembly is similar in design and construction to Ultra Key Mortise Dead lock of M/s. Godrej Lock Manufacturing Company, Mumbai. Horizontal bolt assembly is formed with through cut-out (la) in housing (1) and (7a) of cover (7) for receiving locking cylinder assembly (40) and the aforesaid rotation of 360° of crank (28) causes the locking and unlocking of horizontal dead bolt (6) by well known crank action.
Striker box (20) is formed with a flange (20b) which is formed with a rectilinear hole (20c) for slideably receiving bolt (6). Surface of (20e) of flange (20d) is mounted against the side of door jamb by means of screws (25). Mounting plate (21) is mounted on inside surface of door by means of screws (29) and plate (21) is formed with a hole (21a) for receiving torque bar (26). In this manner, torque bar emanating from cylinder assembly is mounted through hole (la, 7a) of horizontal bolt assembly (20), through plate (21) to knob (9). Mounting plate (21) is formed with holes (21b, 21c, 21d, 21e) for receiving screws (29a, 29b, 29c, 29d). A lock housing (1)
is formed with holes (lb, lc & Id) to receive screws (23a & 23b)-and (25). Screw (25) is engaged with threaded hole (30) of locking cylinder assembly (40).
Cylinder assembly (40) comprises of a actuating key (31), cylinder housing (32), cylinder (33) torque bar (26), crank (28), rosset (34) mounted through the door (22) by screw (35) in well known manner and similar in design and construction to Ultra Mortise Locking Cylinder of M/s. Godrej Lock Manufacturing Company, Mumbai.
In this manner of construction, key (31) may be inserted into lock cylinder (33) and rotated to turn torque bar and crank which in turn simultaneously actuates horizontal bolt (6) and vertical bolt (16) to lock or unlock position. Torque bar (26) in turn simultaneously causes a 180° rotation of knob (9). Alternatively, lock (100) may be locked from inside without key (31) by merely rotating knob (9) to the desired position.
It is also within the contemplation of this invention to utilize other types of bolts such as by way of example, latch bolts, and automatic deadbolts.
In the aforesaid manner of construction, an attempted jimmying of the locks is frustrated in so far as any application of a side-to-side force is blocked by the presence of the vertical deadbolt, and any application of a front-to-back force is blocked by the presence of horizontal bolt i.e., a burglar could attempt to jimmy the horizontal strike plate by applying a side-to-side force to move the plate away from the bolt. However with the present construction, the vertically disposed bolt blocks this action. And the burglar could attempt to jimmy the vertical strike plate by applying front-to-back force in an attempt to strip the vertical strike plate from the back of the jamb. However, with the present construction the horizontally disposed bolt blocks this action. Thus, the present two co-ordinated and transversely aligned deadbolts are seen to compliment each other in providing a jimmy-proof lock.
From the foregoing, it will be seen that this invention is one well adapted attain all of the ends and objects herein above set forth together with other advantages which are obvious and inherent in the lock. It will be understood that certain features and subcombinations 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 shown in the accompanying drawings is to be interpreted as illustrative and not in limiting sense.
WE CLAIM :
1. A lock comprising a first frame portion and a first bolt slidable with the first frame portion, a second frame portion and a second bolt slidable with the second frame portion, means for operably interconnecting said bolts, further comprising means to mount said frame portions to a door and wherein said first bolt is horizontally disposed and said second bolt is vertically disposed when the lock is mounted to the door, said vertically disposed bolt being mountable so as to be disposed on a side of the door, and said vertically disposed bolt having a leading portion to engage a receiving member mounted adjacent to door jamb, and the horizontally disposed bolt being mountable on the door and having a leading portion to slide into a receiving member recessed within the door jamb, said leading portions of said bolts being transversely disposed one directly behind the other and being spaced one behind the other when in the respective receiving members to provide a locked position and means to actuate said interconnecting means being mounted more adjacent one frame portion than the other frame portion whereby the actuating means causes the interconnecting means to slide the leading portions of both bolts from the respective frame portion into the respective receiving members to the locked position.
2. The lock of claim 1, wherein said bolts are dead bolts
3. The lock of claim 2, wherein said interconnecting means being operably connected to said bolts to cause said bolts to be actuated simultaneously to the locked position.
4. The lock of claim 1, wherein said first actuating means is a key and cylinder and wherein said second actuating means is a knob, one end of said interconnecting means being mounted to said cylinder and the other end of said interconnecting means being mounted to said knob.
5. The lock of claim 1, said interconnecting means comprising a torque bar being connected to said actuating means and one portion of said torque bar being operably mounted to means to slide one of said bolts and a second portion of said torque bar being operably mounted to means to slide the other of said bolts said first and second portions being spacedly disposed along the torque bar.
6. The lock of claim 1, said one portion of said torque bar being received in a cam member rotatably mounted in a plate, having a cam surface extending radially from said member wherein said torque bar rotates said member so as to cause sliding said one bolt.
7. The lock of claim 1, wherein key means is rotated about 360°.& key means rotated about 360°
8. The lock of claim 1, further comprising a strike plate being formed with a first hole to receive said leading portion of first bolt and being formed with a second hole to receive said leading portions of second bolt.
9. The lock of claim 1, comprising a second actuating means, one actuating means being mounted to the said side being the inside of the door and the other actuating means being mounted to the outside of the door, and wherein one end of said interconnecting means is mounted to one actuating means and the other end of the interconnecting means being mounted to the other actuating means.
Dated this 13th day of June, 2006
HIRAL CHANDRAKANT JOSHI AGENT FOR
GODREJ & BOYCE MFG. CO. LTD.
A two dead bolt door lock is disclosed wherein the bolts are transversely disposed and wherein the bolts are disposed one behind the other in the locked position so as to provide a secure locking mode. When door mounted, and in the locked position/ a vertical bolt is disposed on the inside of the door adjacent the jamb and a horizontal bolt is mounted in the jamb. Attempts to jimmy the horizontal bolt in its line of least resistance are frustrated by the presence of the vertically locked bolt acting against the jimmying force. The locks are both operated by a single key actuated cylinder and / or hand knob through a common connection rod with coordinated cam actions.
The Controller of Patent
The Patent Office
|Indian Patent Application Number||936/MUM/2006|
|PG Journal Number||12/2010|
|Date of Filing||25-May-2006|
|Name of Patentee||GODREJ & BOYCE MFG. CO. LTD.|
|Applicant Address||LOCK DIVISION PLANT-18 PIROJSHANAGAR, VIKHROLI, MUMBAI-400 079,|
|PCT International Classification Number||E05B9/00|
|PCT International Application Number||N/A|
|PCT International Filing date|