Title of Invention

An apparatus for securing a door in a closed position in an opening of an enclosure

Abstract

A secure enclosure (10) for an automated banking machine includes a door (30). A bolt (38) is slidably mounted on the door andis moveable responsive to the condition of a lock. The bolt includes front portion (56) and back portions (58). In the extended position the bolt engages a latch (60) and an angle member (52) attached to the door. In the extended position, the front portions of the bolt extend through apertures (62), (78) in the latch and angle members respectively. The back portion of the bolt engages second bolt engaging portions (80). An opposed side of the door from the latch includes projecting portions (64). The projecting portions extend in pockets (64)when the door is in the closed position.

Full Text

DESCRIPTION TECHNICAL FIELD This invention relates to automatic banking machines. Specifically this invention relates to a secure enclosure for use in conjunction with an automatic banking machine that holds currency bills, customer deposits or other items of value. BACKGROUND ART Automated banking machines are well known in the prior art. Automated banking machines include automated teller machines (ATMs). Other types of automated banking machines dispense cash, either to a bank teller or directly to a bank customer. Other types of automated banking machines accept cash, checks or other items of value from a customer. A common feature of most types of automated banking machines is that they include a secure enclosure or chest that holds valuable items stored within the machine. The secure chest may also house critical electrical or electronic components. Enclosing the valuable and critical components within a secure chest minimizes the risk that valuables will be stolen or that the critical components will be tampered with by criminals. While it is desirable for secure enclosures used in connection with automated banking machines to be as secure as reasonably possible, they must also be readily accessible by authorized personnel. The contents of a secure enclosure such as cash and customer deposits, must be accessible for replenishment or removal on a convenient basis to authorized personnel. Secure enclosures are typically provided with an access door, which when opened provides ready access to the interior of the secure enclosure. The access door is typically provided with a locking mechanism, such as one or more combination locks that may be readily opened by authorized personnel. Various approaches have been taken in the prior art to providing secure enclosures for automated banking machines. The secure access doors of such enclosures have included numerous types of bolt work in an effort to minimize the risk that the secure enclosure can be opened by unauthorized personnel. Some prior art enclosures have drawbacks and deficiencies. Certain prior art enclosures have access doors which are subject to being more readily compromised than is desirable. Other designs are bulky or highly complex. Some designs suffer the drawbacks of high cost and weight. Some designs require properly authorized personnel to expend more time and energy to open the access door than would otherwise be desirable. Thus there exists a need for an improved secure enclosure for an automated banking machine that provides enhanced security, has reduced cost and complexity and yet allows an access door to the enclosure to be readily opened by authorized personnel. Accordingly, there is provided an apparatus for securing a door in a closed position in an opening of an enclosure, said opening bounded by a wall, and wherein said door is connected with a lock changeable between secured and unsecured conditions, said apparatus characterized by: a projecting member, said projecting member in supported relation with said door, wherein in cross section and in the closed position of said door said projecting member extends inwardly in said enclosure and is adjacent said wall; a latch, said latch in supported connection with said wall, wherein said connection of said latch and said wall is limited to an area disposed inwardly and away from said opening, and wherein in cross section said latch comprises a first bolt engaging portion in the closed portion of said door, wherein said first bolt engaging portion extends away from said area and toward said opening, and wherein in the closed portion of said door said projecting member extends between said first bolt engaging portion and said wall; a bolt, said bolt in movably supported connection on one of said door or said wall, wherein said bolt is movable when said lock is in the unsecured condition from an extended to a retracted position, and wherein said bolt is in the extended position said bolt is in engagement with said first bolt engaging portion of said latch and with said projecting member, and wherein in said extended portion of said bolt said latch and said projecting member are held immovable relative to one another by the engagement by each with the bolt, whereby said door is held in the closed position. DISCLOSURE OF INVENTION It is an object of the present invention to provide a secure enclosure for an automated banking machine. It is a further object of the present invention to provide an apparatus for securing an access door of an enclosure within an automated banking machine. It is a further object of the present invention to provide an apparatus for securing a door of an automated banking machine in a closed position, which apparatus may be readily released by authorized personnel. It is a further object of the present invention to provide an apparatus for securing a door of an enclosure in an automated banking machine which includes a bolt work which is resistant to being compromised. It is a further object of the present invention to provide an apparatus for securing a door of an enclosure in an automated banking machine which includes a deadbolt which provides enhanced resistance to being compromised. It is a further object of the present invention to provide a method for securing a door of an enclosure in an automated banking machine. It is a further object of the present invention to provide a method for securing a door of an automated banking machine in a closed position which provides resistance to being compromised. Further objects of the present invention will be made apparent in the following Best Modes For Carrying Out Invention and the appended claims. The foregoing objects are accomplished in a preferred embodiment of the invention by a secure enclosure in an automated banking machine. The enclosure has a wall bounding an interior area. The enclosure includes an opening which may be selectively opened and closed by a door. The door is mounted in a hinged manner enabling the door to move outward from a closed position to provide access to the interior area of the enclosure. The door includes a lock thereon. The lock is manually changeable between locked and unlocked conditions from the exterior of the door. In the preferred form of the invention the lock is a combination lock that may be readily opened only by authorized persons. A bolt is movably mounted on the interior of the door. The bolt is movable from an extended position to a retracted position responsive to unlocking of the lock. The bolt includes a plurality of vertically spaced front portions. The bolt also includes a plurality of back portions which are inwardly spaced relative to the opening from the front portions. A latch is mounted to a first portion of the wall and extends in the interior area of the enclosure. The latch includes a first bolt engaging portion. The first bolt engaging portion includes a plurality of first apertures. Each aperture accepts a front portion of the bolt therein when the bolt is in the extended position. The latch also includes a plurality of second bolt engaging portions which are disposed inwardly of the first bolt engaging portions. In the extended position of the bolt, the back portions of the bolt are engaged with the second bolt engaging portions of the latch. The door further includes a projecting member. The projecting member extends in cross section intermediate of the first bolt engaging portion of the latch and the enclosure wall. The projecting member includes a plurality of first projection apertures. In the extended position of the bolt, each front portion extends into an aperture in the projecting member as well as through the latch apertures in the first bolt engaging portion of the latch. The engagement of the bolt in the extended position with the first bolt engaging portion of the latch, the projecting member of the door and the second bolt engaging portion of the latch resists movement of the door toward the open position. Efforts to deform the door or enclosure wall by criminals results in deformation which tends to bind the bolt into engagement with the latch and the door. This makes it more difficult to compromise the door and secure enclosure. In a preferred form of the invention, the enclosure is bounded on a side opposed of the latch by a second wall portion. The door is movably mounted adjacent to the second wall portion by hinges. A side of the door adjacent the second wall portion is in connected relation with a plurality of projecting portions. The second wall portion includes a plurality of pockets that are sized for accepting the projecting portions. When the door is in the closed position, the projecting portions extend in the pockets. As a result, when the door is in the closed position, the engagement of the projecting portions in the pockets prevents outward movement. This further increases the security of the door and minimizes the risk that the enclosure may be compromised by unauthorized persons. BRIEF DESCRIPTION OF DRAWINGS Figure 1 is a schematic cross sectional view of a secure enclosure of an automated banking machine housing a cash delivery mechanism. Figure 2 is an isometric view of a secure enclosure of the present invention without its associated door. Figure 3 is a plan interior view of a door and bolt work of the apparatus of the present invention. Figure 4 is an exploded isometric view of the interior of the door and bolt work shown in Figure 3. Figure 5 is a cross-sectional view of an engaged bolt and latch and deadbolt of a first embodiment of the present invention in a secured condition. Figure 6 is a cross-sectional view similar to Figure 5 but with the bolt shown in an unsecured condition. Figure 7 is a cross-sectional view showing alternative embodiments of the latch and deadbolt of the present invention. BEST MODES FOR CARRYING OUT INVENTION Referring now to the drawings and particularly to Figure 1, there is shown therein a vertical cross-sectional schematic view of an enclosure for an automated banking machine, generally indicated 10. Enclosure 10 includes a top wall 12, a back wall 14 and a bottom wall 16. In the preferred form of the invention, walls 12, 14 and 16 are formed from a single sheet of heavy gage steel material. As shown in Figure 2, enclosure 10 further comprises a first side wall 18 and a second side wall 20. The walls of enclosure 10 bound an interior area generally indicated 22. In the preferred form of the invention, side walls 18 and 20 are secured by welding to the formed sheet which comprises the other walls. As shown schematically in Figure 1, interior area 22 houses a plurality of currency containers 24 and a currency transport mechanism schematically shown as 26. It should be understood that while in the embodiment shown, interior area 22 houses currency and a currency delivery mechanism, in other embodiments of the invention the interior area may house other components of an automated banking machine. These components may include electrical or electronic components of the machine as well as deposit, currency and check receiving mechanisms. Enclosure 10 includes an opening 28. A door 30 shown in Figures 3 and 4 is movably mounted on enclosure 10 to selectively open and close the opening. Door 30 is preferably a solid slab of heavy gage steel similar to the walls which make up the enclosure. Door 30 is movably mounted to second side wall 20 by hinges 32 as shown in Figure 5. The hinges enable door 30 to be swung outward to provide access to the currency containers and transport housed in the interior area 22. Door 30 further includes an opening 34 therethrough. In the closed position of the door, currency delivered by transport 26 is delivered through opening 34. Currency delivered through opening 34 is then taken by other transport mechanisms to a point of delivery. The point of delivery may be accessible to a bank teller or to a customer depending on the type of automated banking machine. Door 30 has a bolt work generally indicated 36 mounted thereon. Bolt work 36 includes a bolt 38. Bolt 38 includes several horizontally elongated slots 40. A corresponding number of studs 42 extend inwardly from the inside face of door 30. Studs 42 extend through slots 40 and enable the bolt to be moved horizontally relative to the door. It should be noted that the horizontal slots are staggered so as to prevent cocking and binding of the bolt as it moves in supported relation on the studs. The bolt is secured in engagement with the door by a retainer, schematically indicated 44, and a plurality of locking nuts 46 which are threaded on the ends of the studs 42. The locking nuts are secured in position with cotter pins as shown or other suitable securing means. Bolt 38 is connected to a channel 48. Channel 48 is connected to an actuating bar 50. As schematically shown in Figure 3, actuating bar 50 is operatively connected to a lock that is changeable by authorized personnel to control the secured condition of the door. The lock is in operative connection with a lever which is connected to the actuating bar which enables the bolt to be moved from the outwardly extended position to a retracted position when the lock is in the unlocked condition. Many types of conventional locks and actuating lever mechanisms may be used in connection with the present invention. For example, a mechanism of the type shown in U.S. Patent No. 4,690,073, the disclosure of which is incorporated by reference, may be used to ensure that the lock and lever used for moving the bolt cannot be easily compromised. The particular type of lock and lever used for moving the bolt will depend on the degree of security required and the configuration of the particular enclosure. The selection of such appropriate conventional locking mechanisms is within the knowledge of those skilled in the art. As shown in Figures 3 and 4, door 30 further includes an angle member 52. Angle member 52 is fixably mounted to an interior face of the door. Door 30 further includes on a horizontal side opposed of angle member 52, a side wall portion including a plurality of projecting portions 54. The purpose of these projecting portions is later discussed in detail. Bolt 38 includes a plurality of vertically spaced front portions 56. Bolt 38 also includes a pair of outward extending back portions 58. Back portions 58 are inwardly disposed in the enclosure from front portions 56 so as to make the bolt generally fork-shaped in cross section. It should be understood that while eight front portions and two back portions are shown in the embodiment depicted in Figures 3 and 4, in other embodiments of the invention other numbers of front and back portions may be used. A latch 60 is mounted to first side wall 18. As shown in Figure 2 latch 60 includes a plurality of latch apertures 62. Latch apertures 62 have contours that closely correspond to the profiles of front portions 56 but are sized for enabling a front portion to extend therein. Second side wall 20 includes a plurality of pockets 64 which extend therethrough. The configuration of pockets 64 correspond closely to the configuration and position of projecting portions 54 on door 30. Some of the pockets 64 are positioned closely adjacent to the upper and lower corners of the enclosure on the second side wall. These corners are among the strongest areas of the enclosure due to the mating of the side wall with the top and bottom walls. A cross-sectional view of the bolt and latch is shown in Figure 5. Figure 5 shows the bolt in the outwardly extended position as indicated by Arrow A. This represents the secure position of the bolt. Latch 60 is generally "L" shaped in cross section. It includes a base portion 66 which is secured to an interior surface of side wall 18. Latch 60 further includes a bolt engaging portion 68 through which the latch apertures 62 extend. Bolt engaging portion 68 further includes a nose portion 70. Nose portion 70 abuttingly engages a leg 72 of angle member 52 when the door 30 is in the closed position as shown. Angle member 52 further includes a further leg 74. Leg 74 serves as a projecting member that extends intermediate bolt engaging portion 68 of the latch and first side wall 18. Leg 74 includes a bolt engaging portion 76 through which a plurality of projection apertures 78 extend. Projection apertures 78 each have a contour that closely conforms to front portions 56, but are each sized to enable a front portion to extend therein. Latch 66 further includes second bolt engaging portions generally indicated 80. The second bolt engaging portions include an inward face 82. In the form of the invention shown in Figure 5, inward face 82 is a generally planar face that extends parallel to the inside face of door 30. In the extended position of the bolt shown in Figure 5, each front portion 56 of the bolt extends in a latch aperture 62 in the latch. Each front portion also extends in a projection aperture 78 in the inward extending leg of angle member 52. As angle member 52 and bolt 38 are both secured to door 30, and latch 60 is secured to first side wall 18, such engagement prevents outward movement of door 30. In the extended position of the bolt 38 shown in Figure 5, back portions 58 of the bolt engage the second bolt engaging portions 80 by extending behind face 82. As a result, the engagement of back portions 58 further serves to prevent the outward movement of door 30. Further in the closed position of the door shown in Figure 5, the abutting relation of nose portion 70 of the latch to the leg portion 72 of angle member 52 prevents inward movement of door 30. Likewise inward movement is prevented by the close abutting relation of leg 74 of the angle member and base portion 66 of latch 60. As a result, in the extended position of the bolt shown in Figure 5, door 30 is effectively prevented from moving either outward or inward in the area adjacent first wall 18. As also shown in Figure 5, in the closed position of door 30, projecting portions 54 which are on a side of the door opposite to latch 60, extend in pockets 64 in second wall 20. In the preferred form of the invention the contour of the pockets conforms closely to the profiles of the projecting portions. As a result of this engagement, door 30 is prevented from being moved outward or inward. It should be noted that the prevention of movement of door 30 in this configuration is accomplished even if the hinges 32 are compromised by removal of the pins or other means. Movement of bolt 38 to a retracted position, in which position door 30 may be opened is shown in Figure 6. To retract the bolt 38 it is moved in the direction of Arrow B. In this position, front portions 56 are disposed from latch apertures 62 in latch 60. Front portions 56 are also disposed out of the projection apertures 78 in angle member 52. In the retracted position of bolt 38, back portions 58 are disposed from the inward face 82 of second bolt engaging portions 80. In this position of the bolt, door 30 is enabled to be moved outward so as to provide access to the interior area of the enclosure through opening 28. As door 30 is moved outward on the side adjacent the latch, projecting portions 54 rotate out of pockets 64. As a result, door 30 can be fully opened and authorized personnel can perform work on the apparatus in the interior area. When such work is completed, the door can be returned to the closed position wherein the projecting portions 54 again extend in the pockets. The bolt can then be thrown using a lever or other mechanism, back to the extended position shown in Figure 5. The lock or locks on the door may then be resecured in the appropriate manner. It should be mentioned that in a preferred form of the invention, the contours of the apertures 62 and 78 are made to conform closely to the profiles of front portions 56 of the bolt. As a result, when bolt 38 is in the extended position and a thief attempts to deform the door or first side wall 18 in an effort to gain access to the enclosure, such deformation will result in the front portions 56 becoming jammed. The jamming of front portions 56 in apertures 62 and 78 makes it much more difficult to retract the bolt and further holds door 30 in the closed position. Security is further enhanced because first bolt engaging portion 68 of the latch is disposed inwardly from both the edge of the door and from leg 74 of angle member 52. Security is further enhanced because the door is recessed in the opening when the door is in the closed position. This construction makes it more difficult to access the latch or to deform the latch by using burglar tools extending through an opening created between the edge of door 30 and wall 18. The result is more secure closure of the door. Engagement of projecting portions 54 in pockets 64 when the door is closed also enhances security of the enclosure and minimizes the risk that the door will be compromised. The fact that pockets 64 are located at disposed locations along side wall 20 further enhances security. Specifically the positioning of pockets and projections adjacent to the corners of side wall 20 provide a deadbolt that securely engages the door to some of the strongest areas of the enclosure. To further enhance security, pockets 64 are preferably provided with a cover 84 as shown in Figure 6. Cover 84 prevents access to the pockets 64 from the exterior of the enclosure. Cover 84 is preferably permanently secured to the walls of the enclosure such as by welding and is preferably covered with decorative trim. This construction further presents the advantage that pockets 64 may be accurately cut in wall 20 of the chest using cutting techniques such as laser cutting which provides a very accurate pocket contour. Likewise, projecting portions 54 are preferably precisely cut using a similar technique so that in the closed position, projections 54 and pockets 64 fit together in precise mating relation. Alternative embodiments of the latch and deadbolt of the present invention are shown in Figure 7. In these alternative embodiments, the components are the same as in the previously described embodiment except as expressly discussed herein. Specifically, the embodiment shown in Figure 7 includes an alternative latch 86. Latch 86 is similar to latch 60 except that it includes a second bolt engaging portion 88 which includes an aperture 90 therethrough. Aperture 90 accepts back portions 58 of bolt 38 therein when the bolt is in the extended position. Latch 86 further includes a first front latch aperture 92 and a second front latch aperture 94. The first and second latch apertures bound a recess into which first leg 74 of angle member 52 is accepted. When the bolt 38 is in the extended position, each front portion 56 extends through bolt apertures 92 and 94 as well as an aperture in leg 74 of the angle member. This engagement in combination with back portions 58 extending through apertures 90 may provide enhanced resistance to attack by increasing the points at which the front and back portions of the bolt can be caused to jam in the latch as a result of deformation due to attack. In alternative embodiments of the invention the movable range of the bolt may be extended so that the bolt extends in apertures in the side wall when the bolt is in the extended position. In the alternative embodiment of the invention shown in Figure 7, a plate member 96 is attached in secured relation to the interior of the door 30. Plate member 96 includes projecting portions 98 which are accepted in pockets 100 in side wall 20 when the door is in the closed position. As shown in Figure 7, access to pockets 100 is preferably prevented by a cover 102 which is secured to the exterior face of wall 20 by welding or another appropriate permanent method. As demonstrated through the comparison of Figure 7 to Figures 5 and 6, the positions of the projections and pockets may be varied. Such variations may include varying the size and vertical and/or horizontal positions of the pockets and projections on the door. This can be achieved by using a combination of projections on the door and projections on plates extending interiorly of the door. By varying the positions of the pockets it becomes more difficult for a thief to select a vulnerable point of attack. Further it may be advisable to vary the position of the projections and pockets from machine to machine. In addition, the size of cover 102 can be made sufficiently large and the cover may be overlaid with trim pieces so as to avoid giving any indication as to the position of the projections and engaging pockets when the outside of the enclosure is observed. It should also be noted that although in the embodiments of the deadbolt construction shown the projecting portions are supported on the doors and the pockets are in the walls of the enclosures, this arrangement may be reversed. Specifically, embodiments of the invention may include projections that extend from an inner face of a wall into engagement with a pocket that is supported on the door. The positions of the projections and pockets may also be varied in both size and vertical and horizontal orientation to enhance security. Further, in embodiments of the present invention combinations of projecting portions and pockets on both the walls and door may be used. This enables the use of a unique physical combination for securing the door of the particular enclosure and makes it much more difficult for a thief who is unfamiliar with the interior of the particular enclosure to select points of attack. The new bolt work and deadbolt construction for secure enclosures in an automated banking machine of the invention provides a reliable, yet economical means for securing a door of an enclosure in a closed position. The invention further provides a reliable means of keeping the door closed despite deformation due to attack on the door or enclosure by a thief attempting to gain access. Further, the present invention is readily adaptable to a variety of secure enclosure configurations, locking mechanisms and lever mechanisms for moving a bolt. This makes the present invention particularly well adapted for use on a variety of types of enclosures and banking devices. Thus the new secure enclosure for an automated banking machine of the present invention achieves the above-stated objectives, eliminates difficulties encountered in the use of prior devices and systems, solves problems and attains the desirable results described herein. In the foregoing description certain terms have been used for brevity, clarity and understanding. However, no unnecessary limitations are to be implied therefrom because such terms are for descriptive purposes and are intended to be broadly construed. Moreover the descriptions and illustrations given herein are by way of examples and the invention is not limited to the details shown and described. In the following claims any feature described as a means for performing a function shall be construed as encompassing any means capable of performing the recited function and shall not be limited to the features shown in the foregoing description or mere equivalents. Having described the features, discoveries and principles of the invention, the manner in which it is constructed and operated, and the advantages and useful results attained; the new and useful structures, devices, elements, arrangements, parts, combinations, systems, equipment, methods, operations and relationships are set forth in the appended claims.. WE CLAIM:- 1. Apparatus for securing a door (30) in a closed position in an opening (28) of an enclosure (10), said opening bounded by a wall (18), and wherein said door is connected with a lock changeable between secured and unsecured conditions, said apparatus is characterized by: a projecting member (74), said projecting member in supported relation with said door (30), wherein in cross section and in the closed position of said door said projecting member extends inwardly in said enclosure (10) and is adjacent said wall (18); a latch (60), said latch in supported connection with said wall, wherein said connection of said latch and said wall is limited to an area disposed inwardly and away from said opening, and wherein in cross section said latch comprises a first bolt engaging portion (68) in the closed portion of said door, wherein said first bolt engaging portion extends away from said area and toward said opening, and wherein in the closed portion of said door said projecting member extends between said first bolt engaging portion and said wall; a bolt (38), said bolt in movably supported connection on one of said door or said wall, wherein said bolt is movable when said lock is in the unsecured condition from an extended to a retracted position, and wherein said bolt is in the extended position said bolt is in engagement with said first bolt engaging portion of said latch and with said projecting member, and wherein in said extended portion of said bolt said latch and said projecting member are held immovable relative to one another by the engagement by each with the bolt, whereby said door is held in the closed position. 2. Apparatus as claimed in claim 1, wherein said first bolt engaging portion of said latch has a first aperture and wherein said projecting member has a second aperture, and wherein in the extended position said bolt extends in both said first and second apertures. 3. Apparatus as claimed in either claim 1 or claim 2, wherein said bolt is in movably supported connection with said door, and wherein said bolt comprises a front portion and a back portion, and wherein in cross section said back portion is disposed inwardly of said front portion, and said latch further comprises a second bolt engaging portion, wherein in the extended position of said bolt, said back portion is in engagement with said second bolt engaging portion. 4. Apparatus as claimed in claim 1, wherein said bolt comprises a plurality of front portions each disposed from one another, and wherein said first bolt engaging portion of said latch includes said plurality of first apertures, and wherein in the extended position of said bolt each front portion extends in one of said first apertures. 5. Apparatus as claimed in claim 1, comprising a plurality of interengaging pockets and projecting portions adjacent an opposed side of said door opposed of said latch, and wherein one of either said pockets or projecting portions are in supported connection with said door, and said other of said pockets or projecting portions are in supported connection with a wall portion adjacent said opposed side of said door, and wherein in the closed position of said door said projecting portions extend in said pockets. 6. Apparatus as claimed in claim 1, wherein said bolt comprises a plurality of front portions each disposed from one another, and wherein said protecting member comprises a plurality of apertures, wherein in the extended position of said bolt, each front portion extends in one of said apertures. 7. Apparatus as claimed in claim 1, wherein said bolt means engages said latch means at a plurality of locations. 8. An automatic teller machine comprising door securing apparatus as claimed in any preceding claim. 9. A method for securing a door (30) in an opening (28) of an enclosure (10) by an apparatus as claimed in claim 1, said opening bounded by a wall (18), said door including a lock changeable between secured and unsecured conditions, comprising the steps of: providing a projecting member (74) in supported relation with said door (30), wherein in cross section and in the closed portion of said door said projecting member extends inwardly in said enclosure (10) and is adjacent said wall (18); providing a latch (60) in supported connection with said wall (18), wherein said connection of said latch and said wall is limited to an area disposed inwardly and away from said opening (28), and wherein in cross section said latch (60) comprises a first bolt engaging portion, wherein said first bolt engaging portion extends away from said area and towards said opening, and wherein in the closed position of said door (30) said projecting member (74) extends between said first bolt engaging portion (68) and said wall (18); providing a bolt (38) movable responsive to the condition of the lock, the bolt being in movably supported connection on one of said door (30) or said wall (18), wherein said bolt is movable when said lock is in the unsecured condition from an extended to a retracted position; moving said bolt (38) to the extended position to engage both said first bolt engaging portion (68) of said latch (60) and said projecting member (74), wherein in said extended position said latch (60) and said projecting member (74) are held immovable relative to one another by the operative engagement of each with the bolt (38), whereby said door (30) is held in the closed position. 10. Apparatus for securing a door in a closed position of an enclosure substantially as hereinbefore described with reference to the accompanying drawings.

Documents:

457-del-1997-abstract.pdf

457-del-1997-claims.pdf

457-del-1997-complete specification (granted).pdf

457-del-1997-correspondence-others.pdf

457-del-1997-correspondence-po.pdf

457-del-1997-description (complete).pdf

457-del-1997-drawings.pdf

457-del-1997-form-1.pdf

457-del-1997-form-13.pdf

457-del-1997-form-19.pdf

457-del-1997-form-2.pdf

457-del-1997-form-3.pdf

457-del-1997-form-4.pdf

457-del-1997-form-6.pdf

457-del-1997-gpa.pdf

457-del-1997-petition-137.pdf

457-del-1997-petition-138.pdf

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