DE2362546A1 - Coded key for bank vault lock - has contactors which are connected in parallel and in series on actuation - Google Patents

Abstract

The coded lock is used for bank vault doors whose locking mechanism is actuated electrically. The key operates without noise and wear marks. In order to ensure that this key cannot be copied it has a relatively large number of switching elements among which a smaller number of switching elements are selected and connected in series for actuating the bolt actuating motor. The remaining switching elements are connected in parallel and on actuation they become active and disconnect the circuit selected by the code. The coded lock has switching elements and the bolting mechanism is actuated by the motor. The circuit is interrupted by the switch which is energised by the parallel connected elements.

Description

HOLGER ARENTOFT 5461 ohienberg December 4th, 1973

b. Linz on the Rhine.

PATENT Attorney Kapellenstr. 13th

Tel. Linz 2612, area code 02644

P 224

Applicant : Company H.Peter Gütler
Neuwied on the Rhine

Code lock especially for bank vaults

The invention relates to a code lock, in particular for bank safes, the boltwork of which is electrically operated. Such a boltwork usually consists of a number of cylindrical steel bolts that are inserted from the reinforced door into holes in the armored frames, for safes and larger safes not only to the right and left, but also up and down. With some large safes if the boltwork is operated with one or more electric motors. "_" ■ '-.

Safes and large safes are usually with combination locks equipped, often in connection with locks such as the Brahma-Chubb type. None of these known Locks are absolutely theft-proof. The combination locks generate a faint clicking noise on the pane in question with every step change. By choosing between the outer layer of the reinforced door and the actual lock attaches a sound-absorbing intermediate layer and the manufacturing: narrowing tolerances of the individual parts of the lock, the clicking noise can be reduced to a large extent, but not Eliminate completely. Using an electronically amplified stethoscope is an expert who is about sufficient Time and rest disposes, often able to use the combination code to be determined empirically. Even the most complicated double-bit keys can be copied using a wax print will.

The present invention aims to provide a code lock create that works without noise or signs of wear

Bank accounts: 53322 Stadtsparkasse Linz am Rhein ■ 1093009 Stadt. Girokasse Stuttgart

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and where it is not possible to create duplicate keys. In addition, the code lock according to the invention have a special blocking device which, together with an alarm system assigned to it, takes effect immediately, if an attempt should be made to approach the lock with an incorrect code setting or the code empirically to investigate.

To achieve these goals of the invention, the code lock equipped with a relatively large number of switching elements, including a relatively small number in terms of code is selected and connected in series and, when operated simultaneously, turns on a circuit that at least one the bolt works moving electric motor operates while the remaining switching elements are connected in parallel, and when actuating at least one of these switching elements, a circuit breaker becomes effective, the circuit of the code-wise selected switching element interrupts.

In a preferred embodiment of the invention the code-wise selected switching elements of the code lock by means of a key body that can be placed on the code lock switched, which has a large number of non-active switching elements and a minority of active switching elements in each the same number and in a mirror-inverted arrangement as the switching elements connected in parallel and those in series having switched switching elements of the code lock, wherein they are in the same code order as this are arranged, while a single active switching element located outside the code arrangement is assigned to it Switching element of the code lock connected in parallel switches on and the circuit of the series-connected Switching elements of the code lock interrupts.

In a further advantageous embodiment, a forms like the code lock described above designed special

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Code lock of the safe together with another key * - selkörper an unlocking device in that the simultaneous switching of the switching elements arranged in series of the special code lock closes a circuit that on the one hand the circuit causing the boltwork to block the parallel switching elements of the first code lock interrupts, and on the other hand the boltwork operating circuit of the series-connected switching elements of the first code lock closes again. . . "_...

The locking of the reinforced door after it is closed can. take place in that the electric motor is switched by the handwheel. It can also be used to open the reinforced door responsible code lock be divided into several parts, each part of which has a special cap. be lockable using a conventional security lock. The switching elements of the code locks exist preferably from photoelectric cells, which in Contact channels are attached, while the switching elements; the key body are light sources arranged in corresponding contact channels. Finally, the safe can with be connected to the electrical power grid and supply die.Sahlüsselkörper with electrical power via contact nuts and plug-in contacts. .

An exemplary embodiment of the invention is illustrated and explained below with reference to the drawings. Show it:

Figure 1 shows a safe with a three-part code lock according to the invention, in a front view,

Figure 2 is a partial view of FIG. 1, in which the locking flap is partially cut away from the upper code lock part,.

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Figure 3 shows a key body for the code lock, in a front view,

Figure 4 the section X-X of the key body Fig. 3,

Figure 5 is a schematic representation of the circuit of the active switching elements of the key body Fig. 3 and 4,

Figure 6 is a schematic representation of the circuit

two code lock parts of a reinforced door, which If the code is correct, the reinforced door is opened and if the code is incorrect, the blocking of the boltwork

and

Figure 7 is a schematic representation of the circuit of three code lock parts by the breakdown of the third (on Fig. 1 of the right) code lock part one by incorrect setting the key body of the first and second code lock parts caused blocking of the The boltwork cancels again.

The code lock according to the invention is in the armored door 1 of the Armored cabinet 2 (or vault) built in and consists of three code lock parts 3,4,5. On the door 2 there is also a handwheel 6, the function of which will be described later will.

Fig. 2 shows the code lock parts 3, 4 and excerpts of the special code part 5 and the handwheel 6. Each code lock part 3,4,5 each has a closure cap 31,41,51 which each can be locked with a conventional safety lock 32, 42, 52. Each code lock part has each thirty-six contact channels 33,34; These are holes that are at right angles to the door surface level

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get lost. Furthermore, each code lock part has 3,4,5 each two contact nuts 34,35,44,45, which are intended to Include plug contacts, and those with a not shown Connected to the power source. The one on Fig. 2 does not Visible contact channels and contact nuts of the special code lock part 5 are analogous to the contact channels and contact nuts 33,43,34,35,44,45 of the two other code lock parts arranged. ;

On Fig. 3 is a key body 7 with a push button switch 71 and switch push button 72 shown «, This key body acts as a key for a code lock part. It fits to each of the code lock parts 3, 4, 5 by each having their contact channels 33,43 when the key body 7 is placed on a code lock part 3,4,5 with a corresponding contact channel 73 of the key body corresponds. The exact support of the key body is ensured that the Plug contacts 74, 75 are inserted into the contact nuts 34, 35, 44, 45, see Fig. 4. For each code lock part 3, 4, 5 each includes a key body 7 with contact channels 73, which are arranged according to the same pattern as the contact - channels 33,43 of the code lock parts. '

Fig. 4 shows the section X-X of the key body Fig. 3. Am The bottom of each contact channel 73 is an electrical one Light source 76 arranged, zvB. "A small halogen light bulb. In each key body 7 there are three light sources 761 in series '(in the third key body assigned to the special code lock 5 there are six light sources in this exemplary embodiment). The circuit of the three light sources is shown schematically in FIG Light sources 761 are connected in series because one Then a control lamp 721 can be attached to this series, which signals that all light sources 761 are lit. the remaining non-active thirty-three light sources one

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Key bodies are not switched on (reference numeral 76). The key body receives electrical power for the light sources 761 7 from the safe 2 via the plug contacts 74,75. The light sources 761 can also be from in the key body 7 located dry batteries (not shown) are fed.

As soon as the key body 7 is placed on the relevant code lock part 3.4 and the plug contacts 74.75 in the Contact nuts 34,35,44,45 are inserted, the operator only needs to press the pushbutton switch 72 to activate the light sources 761 to shine. The light then radiates into each corresponding contact channel 33, 43. It only lights up until the operator releases the pushbutton.

The arrangement of the active light sources 761 can be changed by unscrewing the bottom 77 of the key body 7 and the lines 78 in relation to the poles unplugged.

At the bottom of each contact channel 33, 43 of the code lock parts 3, 4 a photoelectric cell 8 is attached, see FIG. 6. Of the thirty-six contact channels 33, 34 one each code lock part are three photoelectric cells 81 in series with the three photoelectric cells 81 of the other code lock part and with a relay 9 switched. The remaining thirty-three photoelectric cells 8 each are designed in parallel and connected to a relay 10. Both relays 9,10 are connected to a power source (not shown) tied together. The safe can e.g. be connected to the mains and / or contain accumulator batteries. While the circuit of the photoelectric cells is operated with low current, the relays 9, 10 switch high current on, provided the safe is connected to the power supply. The relay 9 is connected to an electric motor 11

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tied together. The relay "10 is connected via a distributor 12 an electromagnet 13 in connection, which has a magnetic switch 14 in the circuit of the series-connected photoelectric cells 81 actuated. Power lines lead from the distributor 12 to an alarm transmitter 15.

A change in the code arrangement of the photoelectric Cells 8.81 are made from the inside of the armored door 1, where each code lock part 3, 4 can be reached through a separately closed flap (not shown).

When all six series-connected photoelectric Cells 81 are irradiated by the six light sources 761 of the two key bodies 7, the circuit closes of the relay 9. The electric motor 11 pushes via a worm gear 16 the boltwork 17 in the locking position.

Will only have a single photoelectric cell 8 that is not too belongs to the selected code group of cells 81, irradiated, closes the circuit of the relay 10 and actuates the electromagnetic switch 13,14. Then is the circuit of the relay 9 interrupted and the boltwork 17 blocked.

The blockage can be removed again by pressing the third key body 7 on the third (on Fig. 1 the on the right) code lock part 5, see Fig. 7. The third The key body 7 is designed exactly like the key body shown in FIGS. 3 and 4, only here they are not three but six light sources 761 switched on. Accordingly, six photoelectric are in the code lock part 5. Cells 82 connected in series with a relay 18 while the remaining thirty photoelectric cells 8 of the code lock part 5 are connected in parallel with the relay 10. When the correct six codes are used, the six active photoelectric cells 82 complete the circuit of the relay 18, which then switches two electromagnetic switches 19, 14 and 20, 21. The switch 20,21 interrupts the circuit of the:

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Relay 10, which excites the electromagnet 13, while the electromagnet 19 moves the magnetic switch 14 into the switch position of the relay 9 circuit returns. When inserting the key body 3.4 with the correct six-digit code the lock is brought into the open position by the electric motor 11. When the reinforced door 1 is closed again is to be, you bring it first in the closed position and then turn the handwheel 6, through which the electric motor 11 is switched on in the opposite direction of rotation and the boltwork 17 moves into the locking position

The code lock according to the invention can be operated in the described three-part form as follows: depending on a bank official is owned each one of the key body 7/3; tmet, 7/4, a third bank clerk keeps the third key body 7/5. The reference numerals 7/3 etc. denote the key body 7 belonging to the code lock 3 or 4 and 5, respectively. 4 in position. Then press the pushbuttons 72 · Ein im at the same time. The signal transmitter (not shown) located in the safe shows a buzzer signal (or an optical signal) that unlocking has been completed. The reinforced door 1 can then be opened with the handwheel 6.

The third bank clerk with the key body 7j / 5 only goes into action if the boltwork is due to incorrect irradiation of a photocell 8 that does not belong to the code group, i.e. practically only after a break-in attempt The key body 7/5 can therefore be deposited in a third place

The probability that someone could feel the code is zero. With the 72 contact channels of this embodiment, more than 156 million different groups of six can be formed, almost twice as many as possible

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Combinations of a double four-disc combination lock and almost one hundred and sixty times as much as at the usual three-disc lock. Also the code of the code lock part 5, which cannot open the reinforced door, but is only intended to unlock an existing lock practically impossible to feel, because with 36 contact channels around 2 million groups of six can be put together.

The code cannot be recorded otherwise. The rays of light leave no signs of wear. A systematic one Irradiation of the photocells has no purpose, because when irradiating only one of the connected in parallel In cells 8, the entire boltwork is locked immediately and the alarm is triggered. For the same reason, it is useless to move the cells one by one to irradiate, especially since the irradiation of the code-wise connected in series cells 81 must take place at the same time.

Because the code group is based on two independent key bodies 7/3 and 7/4 are two different ones Bank officials responsible and necessary for opening the cabinet. In order to prevent gangsters from forcing both officers to go to the safe with them and open it, you can access at least one of the key bodies Attach a second switch (not shown) that switches on additional light sources when you press your finger, which then blocks the boltwork and switches on the alarm »

The exemplary embodiment shown here relates to the use of photoelectric cells, such as z _o B _{o selenium cells.} It goes without saying that the contacts in the contact channels 33, 43 can also be established mechanically by installing pressure switches in the channels instead of the phbto cells and equipping the key bodies 7 with corresponding rapid pressure fingers

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expressing a variant of the inventive idea, however, is practically not recommended because the inevitable Signs of wear from mechanical actuation that could reveal the code. Another variant is more realistic, in which the switching of the individual switching elements takes place pneumatically by inserting a key from the key body Air overpressure in the contact channels of the code is created and on appropriately trained pressure switches on Acts on the bottom of the channels.

Compared to the state of the art, the invention brings a decisive advance in that for the first time a code lock is presented, the code of which cannot be felt, and which each time an attempt is made to approach the code lock, immediately switches on an alarm system. Further technical advantages are the simplicity of the system as well as the simple and at the same time secured device for unlocking if the boltwork was blocked by a false excitation is.

7 claims

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Claims (7)

Pat-en tans ρ r ü c ti e. 1.) Code lock especially for bank safes, their boltwork is operated electrically, characterized in that the code lock (3,4) contains a relatively large number of switching elements (8,81), among which a relatively small number (81) is selected in terms of code and connected in series and, when actuated at the same time, switches on a circuit which at least a the boltwork (17) moving electric motor (11) betiELbt while connected in parallel with the remaining switching elements (8) are _t and a switch (13,14) is effective in Bwtätigung of at least one of these switching elements (8) of the circuit of the code moderate selected switching elements (81) interrupts. 2 · Code lock according to claim 1, characterized in that the code-wise selected switching elements (81) of the code lock (3, 4) are connected by means of a key body (7) that can be placed on the code lock, which one Large number of non-active switching elements (76) and a minority active switching elements (761) in the same number and in the same reverse order as the parallel switched switching elements (8) and the series-connected switching elements (81) of the code lock (3, 4) has, the switching elements (761) of the key body (7) in the minority being the switching elements (81) of the code lock (3, 4) connected in series if they are in the same coded order how these are arranged while a single outside the active switching element (761) located on the code arrangement the switching element (8) connected to it in parallel of the code lock switches on and the circuit of the in series switched switching elements (81) interrupts. - 12 - P 224 3. Code lock according to claim 1, characterized in that a special code lock designed like the code lock (3, 4) (5) together with another key body (7/5) forms an unlocking device by the simultaneous Switching the series-arranged switching elements (82) of the code lock (5) closes a circuit that on the one hand the blocking of the boltwork (17) causing the circuit of the parallel switching elements (8) of the other code lock (3,4) interrupts, and on the other hand, the boltwork (17) operating circuit of the series switched switching elements (81) closes again. 4. code lock according to claim 1, characterized in that the Locking of the armored door (1) after it is closed is driven by the electric motor (11), which is driven by the handwheel (6) is switchable in the corresponding direction of rotation. 5. Code lock according to claim 1, characterized in that the code lock (3, 4) responsible for opening the reinforced door (1) is divided into several parts (3 and 4), each of which has a special flap (31,41) underneath Use of a conventional security lock (32, 42) is lockable. 6. Code lock according to claims 1, 2 and 3, characterized in that the switching elements (8,81,82) of the code locks (3,4, 5) consist of photoelectric cells which are mounted in contact channels (33, 43), while the switching elements (76, 761) the key body (7) are light sources arranged in corresponding contact channels (73) 7. Code lock according to claim 1, characterized in that the safe (2) is connected to the electrical power grid and the code locks (3, 4, 5) as well as the key bodies (7) via contact nuts (34, 35, 44, 45) and plug contacts (74, 75) supplied with electricity. 509S25 / 0203