DE4433333A1 - Retrofittable auxiliary locking system for a mortise lock - Google Patents

Abstract

An auxiliary retrofit assembly is mounted to the opposite sides of a door 12 to provide an electronically operable level of security. An electronic reader 80 generates a signal which partially controls the operation of the mortise lock to provide an additional level of security for a conventional latch/deadbolt installation. A card reader, key pad or contact activatable data port generates a signal to aotuate a solenoid 54 to retract an am 56 to thereby allow rotation of the mortise look. The arm engages a slot in a lug 68 carried by a member 64 secured to rotate with lock cylinder 30. <IMAGE>

Description

The invention relates generally to mortise locks locks), which also have a locking bolt in conjunction with a Can have a door latch with a handle or Handle can be operated. In particular, the Invention in general on door lock systems, the multiple Include levels of door lock security.

For buildings that have many interior secured areas, such as for example apartment buildings, dormitories, hotels etc. it is usual that the door has a door latch from both sides the door is operated using a handle or a handle that can have different shapes. In addition is the main mechanical lock security through reaches a locking bolt that is conventional from the outside side of the door using a mortise lock key cylinder which is operated. The locking bolt is typically on the inside of the door with a thumb piece to lock it and actuate with a latch or a button to unlock does.

For security systems based on a conventional Locking latch and a lockable latch mechanism  security may be based on temporary users of the Systems are reduced dramatically. key can easily be duplicated. If a resident or tenant can no longer legally enter the secured area consciously held the key or a copy of the key a person who is no longer authorized to enter. As a result, appropriate security standards can be achieved request that the mortise cylinder be removed completely and is replaced. Of course, replacing one else can mechanically intact component is an expensive, time-consuming and inefficient process to guarantee security.

There have been improvements in security systems for tenants more and more towards electronic lock systems that programmable processors use to valid Identify passwords to gain limited access Area and for information regarding such Record access. Card readers, keyboards and by Kon Data connections that can be activated cyclically are now generally turns to gain access to restricted areas. Such improvements have been proven for new installations proven popular. Such electronic security systems can, however, be used for existing convent buildings have national security systems that are still perfect mechanical and structural condition, be extremely expensive.

In short, the invention consists in a preferred embodiment form of guidance in an auxiliary locking system to be retrofitted for a mortise lock that also operate a locking bolt can. The system to be retrofitted is particularly connected applicable with a conventional mortise lock door that a lock cylinder, a door latch with handles on the inside side and the outside to operate the door latch and one Has locking bolt in connection with the door latch is used and by a thumb piece and a lever on the inside and a key on the outside  is cash.

The auxiliary lock can be operated with a key Switches, a card reader, a keyboard, one by con clock-activated data connection, a terminal or another electronic security reader on the outside of the door exhibit. The electronic reader is preferably above of the mortise lock cylinder. A kopp arrangement is rotatable on the rotatable pin of the Lock cylinder attached. One controlled by a solenoid ter, retractable arm is so biased that it is in one Recess of the coupling arrangement engages around the link and the pin of the lock cylinder with respect to rotation in one to hold a fixed angular position regardless of whether the Otherwise key can be used to turn the pin. A signal from the electronic laser activates the brine noid to withdraw the locking arm and thereby the key operated rotation of the pin and retraction the latch and, in some cases, the deadbolt lichen. A housing for the power supply, the solenoid and the other components of the auxiliary lock is on the Inside the door generally opposite the mortise lock arranged.

The retrofittable auxiliary lock system can easily be retrofitted a conventional latch / deadbolt mortise lock arrangement to be upgraded to a level of security in addition to achieving what is conventional Latch / dead bolt-lock combination is obtained.

An object of the invention is to provide a new and improved auxiliary security levels for a conv tional lockable latch / deadbolt security system.

Another object of the invention is to provide a new and improved kit and process  for retrofitting a door with conventional mechanical Lock to an electronically operated security level to obtain.

Another object of the present invention is Creation of a new and improved facility and one Systems that connect in a cost effective and effective manner with a conventional mortise lock installation is working.

Other objects and advantages of the invention will become apparent from the Description and the drawings become clear. The Erfin dung is based on advantageous execution shape with reference to the accompanying drawings described for example. Show it:

Fig. 1 in an end view, partly broken away, partly in section, partly in phantom and partly schematically part of a door with a lock, a latch and a locking bolt and with a retrofittable auxiliary locking system according to the invention;

Fig. 2 in a side view inside, partially broken away and partially in phantom, the arrangement and the retrofittable locking system of Figure 1, ge see from the left side.

Fig. 3 is a side view from the outside, partially in phantom position, the door, the arrangement and the retrofittable locking system of Figure 1, seen from the right side.

FIG. 4 is a partial view of the door, the arrangement and the lock system that can be upgraded from FIG. 2 along the line 4-4 of FIG. 2;

Figure 5 is a partial view of the door and retrofit locking system of Figure 3 taken along line 5-5 of Figure 3;

Fig. 6 is an enlarged perspective exploded view of a half portion of the retrofit locking system of FIG. 1;

Fig. 7 is a schematic block diagram of the retrofittable locking system of Fig. 1; and

Fig. 8 is a schematic view of alternative Ausführungsfor men the invention of the retrofit auxiliary locking system of FIG. 1,.

In the drawings, in which like reference numerals designate like parts in all figures, a retrofittable auxiliary arrangement of the invention is generally designated by reference number 10 . The retrofittable lock assembly 10 is specially designed to be attached to a door 12 which connects a conventional lockable or non-lockable latch 14 in conjunction with a conventional lock bolt. The door 12 has an inner access restricted or secured side 18 and an outer side 20 .

The latch is typically actuated by a pawl 22 on the outside and a pawl 24 on the secured side or by means of keys. The pawls 22 and 24 can take various forms including that of the pawls shown, buttons, or other well known components. The locking bolt 16 works independently of the latch 14 . The locking bolt can be moved out and retracted from the secured side with the aid of a thumb piece 26 , the thumb piece 26 rotating a spindle 28 . The locking bolt can be moved out or moved back from the outside with the aid of a key-operated lock 30 . You have access to the thumb piece 26 from the secured side. Retraction of the locking bolt can also be effected by the pawl 24 . The retrofittable lock assembly finds application in a variety of applications with doorways and locks, including installations where a deadbolt is not used and where the door latch is locked with a mortise lock.

The lock 20 is a conventional mortise lock with a key slot 31 , which is accessible from the outside in the illustrated embodiment. The lock 30 can be operated using a suitable key 32 to rotate the cylinder pin 34 . A Nockenbetschlußele element 35 is rotatably attached to the pin 34 on its rear side and pulls the latch 14 or the locking bolt 16 and the latch 14 by means of a conventional actuating arrangement, which is generally designated by the reference number 36 . The spindle 28 also actuates the transmission actuator 36 independently. Alternatively, a rotatable rotating piece (not shown) can be used instead of the key operated mortise lock shown.

The retrofittable auxiliary lock arrangement 10 has a front sub-assembly or assembly part 38 , which is fastened to the front surface of the outside 20 of the door above the mortise lock, and a co-operating rear sub-assembly or assembly part 40 , which is located on the secured side 18 of the door above the pawl 24 is attached.

The front sub-assembly 38 has an electronic reader, as will be described hereinafter, and may take a number of other forms, such as shown in FIG. 8. Regardless of the shape, the front sub-assembly preferably has a housing 42 with internal threaded holes 44 ( Fig. 5). Elongated fastening elements or bolt parts 45 extend from the rear sub-assembly through a bore 46 which is drilled through the door and are anchored in the bores 44 in order to hold the sub-assemblies 38 and 40 firmly in position on the opposite sides of the door . The top of the rear sub-kit 40 can also be fastened with the aid of screws 47 with an anchor or base plate 49 of the sub-kit directly against the door.

The rear sub-assembly 40 includes a cover 50 which is secured over the base 49 which is secured against the secured side of the door generally opposite the front sub-assembly to form a housing. From cover 50 has an upper beveled shape. The cover extends and ends downward above the thumb piece 26 . The cover is fastened to the base plate with a pair of fastening elements 51 .

A bracket 52 inside the housing carries a solenoid 54 . The solenoid 54 pulls back a vertically displaceable pulling arm 56 which protrudes through a guide 58 . The pull arm 56 is spring loaded so that it is normally in an extended engaged position, as will be described below.

As shown in FIGS. 1, 4 and 6, a zylin drisches yoke is mounted in a bore 62 of 60, the pins in the door is in general alignment with the lock cylinder the cylinder is bored 34th The yoke has a diametrical slot 61 at one end and a central axial rectangular opening 63 which intersects the slot at right angles. An elongated flat extension rod 64 with a T-shaped end is held by the yoke, the end being located in the slot and the rod protruding through the opening. The coupling yoke 60 is fixedly connected to the lock cylinder journal 34 with respect to rotation by means of screws 65 which are screwed into the rear of the journal through the openings of the cam actuator 35 so that the coupling yoke 60 , extension rod 64 and cam actuator 35 engage Turn the pin. The rod 64 extends axially through an opening through the base plate 49 into the interior of the housing. The outer end portion of the rod 64 slidably receives and rotatably locks with a cylindrical pin 68th The pin has a circumferential recess 70 which is delimited by side walls which are slightly beveled ( Fig. 2). The recess is angularly aligned with respect to the extension rod, so that when the plug-in lock is in the position with the locked pin, the recess 70 opens upwards and comes into engagement with the distal end of the spring-loaded tightening arm 56 . The engagement of the tightening arm 56 in the recess 70 prevents rotation of the coupling rod 64 and, as a result thereof, the pin 34 of the lock, even when the correct key is used.

Batteries 72 are mounted in parallel on the inside of the housing on opposite sides of the solenoid 54 . Electrical conduction from the batteries connects through a circuit 74 ( FIG. 7) attached to a circuit board 78 at an upper location of the housing to power the solenoid 54 and the front sub-assembly 38 , such as this to be described below.

As is apparent from FIGS. 1, 3 and 5, the front part of a kit 38, which carries an auxiliary safety control system, an electronic reading device 80 may include having an activatable by contact data terminal 82, such as a touch entry ^TM -Zugangskontrollsystem, Series 780 , from Locknetics Security Engineering. Access through the door is thus partially obtained via a ROM chip 84 which has a predetermined code. Chip 84 may be attached to pouch 85 . The chip 84 essentially acts as a second key. A green LED 86 (light emitting diode) and a red LED 88 may also be placed on the front surface to form a visible indication of the status of the data port reader 80 .

Alternatively, as shown in FIG. 8, the front sub-kit may include a card reader 90 or a reader 92 with a membrane keyboard, such as the Smart Entry ^™ Access Control System, Series 770 from Locknetics Security Engineering, Forestville, Connecticut, USA. Alternatively or in addition, a keyboard 96 or other electronic readers or access controls (not shown) such as an eye scanner, a palm reader, etc. can be used. A lock 98 that operates an electrical switch can also be attached to the front sub-kit.

The electronic reader or lock generates a release signal via an electrical line 102 , which is applied to the circuit 74 for the solenoid 54 . If a valid key, password, card, data chip or other electronic access device is used, the release signal is generated. The enable signal includes a switch for energizing the solenoid 54 for a predetermined time interval, thereby withdrawing the pull arm 56 . When retracted, the distal end of the pull arm disengages the recess 70 so as to allow the mortise 34 to rotate when the correct key is used. A predetermined delay time interval, such as 5 seconds, is preferably seen when the arm 56 is retracted to provide sufficient time to operate the mortise lock with the key. The length of the time delay interval can be programmable. At the end of the delay period, the tightening arm 56 is again pressed into the recess 70 under the spring preload of the solenoid.

As shown in FIG. 7, the circuit 74 has a microprocessor 110 which communicates with the reader 80 via a reader interface 112 . The microprocessor stores the information and data in order to be able to detect a valid password. The microprocessor also generates suitable signals for LEDs 86 and 88 . If a valid password is detected, a pulse width modulated signal is sent to the solenoid driver 114 to energize the solenoid 54 . Alternatively, the solenoid 54 can be omitted and the microprocessor 110 can generate signals for a bidirectional driver 116 that either drives a gear motor 120 to control the position of the arm 56 or a locking solenoid 122 that also controls the position of the arm 56 . A switch interface 126 for clearing the memory of the microprocessor 110 and for initiating a programming mode is also connected to the microprocessor. The microprocessor also communicates with the non-volatile memory 130 , which contains the basic program and the data. The microprocessor and the various functions are controlled by an oscillator 132. A reset switch 140 provides an input to the microprocessor to begin the programming mode.

The batteries 72 are connected via a regulator 142 to a kick starter 144 , which in one embodiment provides a 5 volt power supply for the circuit components. A detection circuit 146 for battery replacement and a detection circuit 148 for battery charging are also provided in the circuit. If the battery charge or voltage is above a predetermined value, the green LED 86 will pulsate when access is gained through the auxiliary reader or lock. If the battery charge is not above the value, the red LED 88 will pulsate, indicating that the batteries should be replaced. A cancel switch 150 provided in the lock can be used to cancel the time delay interval when unlocking is completed, thereby saving energy.

Reference is now made to FIG. 8 in addition. An additional lock cylinder 160 may be used to directly bypass or overcome the solenoid 54 in the event of power supply failure. A second master key can be inserted into the lock cylinder 160 to actuate a switch to directly provide power from a battery 162 provided therein to move the solenoid (or motor) to an unlocked position. For installations powered by a remote source, a leaf switch 164 or other switch may be operated to enable the solenoid to be unlocked directly without error.

The installation of the retrofittable lock kit 10 does not require a major change to the door or the locking bolt / latch lock set. The door modification can essentially be limited to drilling a bore 46 and a bore 62 . The fasteners for the cam actuator 35 are removed. The cylinder yoke 60 and the rod 64 are installed over the reattached cam actuator from the secured side of the door and attached to the rear side of the plug pin 34 with the aid of screws 65 . The thumb piece 26 need not be removed. The front and rear sub-kits 40 and 38 are then brought into position. The electrical lines are routed through the door and connected to the circuit 74 . The partial kits 38 and 40 are fastened by the fastening elements 45 and 51 in place. The batteries 72 can be installed beforehand. Then the cover 50 is attached to the base plate 49 .

It will be appreciated that the retrofittable auxiliary lock assembly 10 can be attached to the door with a relatively efficient installation to provide increased door security. The lock kit enables independent pulling back and moving out of the locking bolt by the thumb piece 26 and / or the pawl 24 on the secured side of the door. However, access to the secured area can only be obtained if both a correct key is used and a valid input signal is entered by the user on the keyboard or via a card, a data chip, a second key or other means.

Retrofitting is achieved by inserting the Castle remains intact and making only minor changes on the door and the locking pin mechanism that already exist. Preferably uses a built-in power supply (battery), although the retrofit system also for one with electrical chip voltage supplied door could be adapted.

Claims (26)

1. Door lock system that has
a door with opposite first and second sides;
Latch means for closing the door with a latch and first actuating means on the first and second sides for actuating the latch;
Locking bolt means for selectively moving a locking bolt which are fastened to the door and have second actuating means which are accessible on the first side for actuating the locking bolt; and
Lock means attached to the door and accessible from the second side, the lock means being operatively connected to the lock bolt means for retracting the lock bolt;
characterized in that auxiliary lock means ( 10 ) are provided which include auxiliary input means ( 80 , 90 , 92 , 96 ) accessible on the second side ( 20 ) for generating an electrical signal in response to a predetermined input and operable with the lock means ( 30 ) is connected to impose an auxiliary closing condition on the lock means ( 30 ). 2. Door lock system according to claim 1, characterized in that the auxiliary lock means ( 10 ) have an auxiliary arm arrangement which can be brought into position selectively to prevent the actuation of the lock means ( 30 ). 3. Door lock system according to claim 2, characterized in that it has an extension member which is rotatably connected to the lock means ( 30 ), wherein the arm arrangement can be brought into position to fix the position of the extension member with respect to rotation. 4. Door lock system according to claim 2, characterized in that it has electrically operated drive means ( 54 ) which respond to the electronic input means ( 80 , 90 , 92 , 96 ) to withdraw the arm assembly to enable actuation of the lock means. 5. Door lock system according to claim 4, characterized in that the drive means comprises a solenoid ( 54 ). 6. Door lock system according to claim 4, characterized in that the drive means ( 54 ) and the arm arrangement are arranged on the first side of the door. 7. Door lock system according to claim 1, characterized in that the input means ( 80 , 90 , 92 , 96 ) has an electronic card reader ( 90 ). 8. Door lock system according to claim 1, characterized in that the input means has an electronic data connection ( 80 ) which can be activated by contact. 9. Door lock system according to claim 1, characterized in that the input means has a keyboard ( 96 ). 10. Door lock system according to claim 1, characterized in that the input means has a key-operated switch ( 98 ). 11. Door lock system according to claim 1, characterized in that the lock means has a turned part.   12. Door lock system according to claim 1, characterized in that it has fail-safe means ( 160 ) for overcoming the auxiliary lock means ( 10 ). 13. Door lock system according to claim 12, characterized in that the fail-safe means has a key-operated switch ( 160 ) and an auxiliary power source ( 162 ). 14. Retrofittable kit for adding an auxiliary safety level for a door with a locking bolt which can be actuated by a rotatable lock which is accessible on a first side by a key for actuating the same, characterized in that it has
electronic reader means ( 80 , 90 , 92 , 96 ) for electronically reading an input;
rotatable connecting means which are ver bindable with the lock ( 30 );
Auxiliary lock means ( 10 ) responsive to the electronic reader means ( 80 , 90 , 92 , 96 ) to lock the coupling means at a fixed angular position and to selectively unlock the coupling means;
Power supply means ( 72 ) for supplying the auxiliary lock means ( 10 ) and the reader means ( 80 , 90 , 92 , 96 ) with power; and
Assembly means for assembling the coupling means, auxiliary lock means ( 10 ) and supply means ( 72 ) on the second side and the electronic reader means ( 80 , 90 , 92 , 96 ) on the first side,
wherein the lock ( 30 ) can only be unlocked by the key ( 32 ) and a valid entry on the electronic reader means ( 80 , 90 , 92 , 96 ). 15. Retrofittable kit according to claim 14, characterized in that the auxiliary lock means ( 10 ) has an arm and the coupling means recess means for forming a recess, the arm being engageable with the recess. 16. Retrofittable kit according to claim 15, characterized in that it has a solenoid ( 54 ) for retracting the arm. 17. Retrofittable kit according to claim 14, characterized in that the electronic reader means ( 80 , 90 , 92 , 96 ) has a card reader ( 90 ). 18. Retrofittable kit according to claim 14, characterized in that the electronic reader means ( 80 , 90 , 92 , 96 ) has a keyboard ( 96 ). 19. Retrofittable kit according to claim 14, characterized in that the electronic reader means ( 80 , 90 , 92 , 96 ) has a data connection ( 80 ) which can be activated by contact. 20. Retrofittable kit according to claim 14, characterized in that the power supply means has a battery ( 72 ). 21. Retrofittable kit according to claim 14, characterized in that it has fail-safe means ( 160 ) for overcoming the auxiliary lock means ( 10 ). 22. Door lock system which comprises:
a door with opposite first and second sides;
Latch means for closing the door having a latch and latch means on the first and second sides for actuating the latch;
Locking means for selectively moving a locking bolt attached to the door and the actuating means on the first side for selectively removing and retracting the locking bolt; and
Lock means attached to the door and accessible from the second side, the lock means being operatively connected to the locking bolt means,
characterized in that the system further comprises
Input means ( 80 , 90 , 92 , 96 ) accessible on the second page for generating an electrical enable signal in response to a valid input; and
Auxiliary lock means ( 10 ) for imposing an auxiliary locking condition on the locking bar locking means and responsive to the release signal to selectively remove the locking condition for a predetermined time interval. 23. Door lock system according to claim 22, characterized in that the auxiliary lock means ( 10 ) has an auxiliary arrangement which can be brought into position selectively in order to prevent actuation of the lock means. 24. Door lock system according to claim 23, characterized in that the lock means comprises a cylinder and a rotatable pin ( 34 ) and further an extension rod which is connected to the pin, the arm assembly being operable to change the position of the extension rod with respect to rotation to fix. 25. Door lock system according to claim 24, characterized in that it has a solenoid ( 54 ) which responds to the release signal to withdraw the arm kit and allow rotation of the pin ( 34 ). 26. Door lock system according to claim 25, characterized in that it has fail-safe means ( 160 ) for directly supplying the solenoid with power in order to enable rotation of the pin ( 34 ).