Method for credentialing mechanical keys and associated devices

Technical field

0001This invention generally relates to access control; in one aspect to a new method for turning mechanic access control to "EAC" (Electronic Access Control) by converting existing mechanical cylinder lock keys to "smart" EAC keys without affecting their mechanic locking property and/or changing their respective existing lock cylinder; assisted by means of specifically designed and working credential readers, lending such keys and other new key devices, such credentials. The invention also relates to associated reader devices and key devices; one aspect is moreover for providing general EAC access for staff, e.g. home-care providers, as well as beside also maintaining individually defined EAC access for e.g. residents.

Background of the invention

0002The most common way to lock and unlock an access-controlling object such as a lock-provided door, is probably by using a mechanical key to both "decode" and "motor" the lock. This solution is cost-efficient and familiar to use: and sophisticated mechanical locks, esp. high security pin tumbler cylinder locks such as biaxial ones, are hard to force or pick, why such locks are recommended by authorities and often are granted incentives by insurance companies etc.. There is so all reason to keep this format; esp., of course, where already installed.

0003However, there are also drawbacks with this solution, some of them serious. Mainly, the key doesn't have any restriction other then that it fits in its lock, i.e. it always work in that lock. This means that that a lost key cannot be incapacitated, other than by changing its belonging lock, which is costly and disturbing, esp. if many persons use that lock. The key also does not have any separate identity, so key abuse etc. becomes anonymous, thus untraceable to a specific source or incident; and thus corrective measures hardly be taken. If a large number of users, esp. staff, are involved, some sort of key administration is often needed.

0004To overcome such and other disadvantages and still being able to keep the mechanical locks intact, mechanical keys' encodings have been substituted by EAC means such as cards and codes; and the "motor" action of the keys by motor means such as in e.g. <patcit id="pcit0001" dnum="WO2006098690A"><text>WO 2006/098690</text></patcit>, or "motoring" by the handle as e.g. in <patcit id="pcit0002" dnum="SE529017"><text>SE 529017</text></patcit>. These are complicated and costly, though; and if then not all mechanical keys are abandoned, retains many above-mentioned drawbacks and risks.

0005There are in the art lock systems that open by combined mechanic and electronic so called hybrid keys; and where the the electronic part most often is in the key's bow as a circuit or at it as an RFID "tag". However, these systems cannot upgrade/retrofit most already in use locks/keys, which must be altogether newly purchased/installed; and the few locks that can be upgraded/retrofitted will have to change at least the essential active part, the cylinder, and also most often all keys, in order to be employed; and which all is costly and extensive. Prior art patents in this area are i.a.: (all US) <patcit id="pcit0003" dnum="US3889501A"><text>3,889,501</text></patcit>; <patcit id="pcit0004" dnum="US4277962A"><text>4,277,962</text></patcit>; <patcit id="pcit0005" dnum="US4393672A"><text>4,393,672</text></patcit>; <patcit id="pcit0006" dnum="US4788859A"><text>4,788,859</text></patcit>; <patcit id="pcit0007" dnum="US4924686A"><text>4,924,686</text></patcit>; <patcit id="pcit0008" dnum="US4988552A"><text>4,988,552</text></patcit>; <patcit id="pcit0009" dnum="US5003801A"><text>5,003,801</text></patcit>; <patcit id="pcit0010" dnum="US5311757A"><text>5,311,757</text></patcit>; <patcit id="pcit0011" dnum="US5351042A"><text>5,351,042</text></patcit>; <patcit id="pcit0012" dnum="US5771722A"><text>5,771,722</text></patcit>; <patcit id="pcit0013" dnum="US5775148A"><text>5,775,148</text></patcit>; <patcit id="pcit0014" dnum="US5848541A"><text>5,848,541</text></patcit>; <patcit id="pcit0015" dnum="US6318137B"><text>6,318,137</text></patcit>; <patcit id="pcit0016" dnum="US6418763B"><text>6,418,763</text></patcit>; <patcit id="pcit0017" dnum="US6442985B"><text>6,442,985</text></patcit>; <patcit id="pcit0018" dnum="US6927670B"><text>6,927,670</text></patcit>; <patcit id="pcit0019" dnum="US7140214B"><text>7,140,214</text></patcit>; <patcit id="pcit0020" dnum="US7316140B"><text>7,316,140</text></patcit> and <patcit id="pcit0021" dnum="US7397343B"><text>7,397,343</text></patcit>.

0006It is object of the present invention to overcome such as above problems by, without changing the existing cylinders/keys, lending existing cylinder locks/keys both restriction and identity, i.e. credentialing them, by specifically equipping them; and in doing so, by the actions/influence of specifically designed reader devices, thus giving the keys/locks full EAC-capability as well as keeping the original keys' mechanical capability to actuate, "motor", their lock, thus eliminating the need for e.g. an electric motor. It is still object of the present invention to provide service staff with EAC-capable, universally usable, advantageous and facile to manage "motoring" key/reader devices for existing cylinder locks, while still offering like capacities also for individual, already existing mechanical keys for same locks.

Brief description of the drawings: all illustrative, exemplary and/or schematic.

0007<ul id="ul0001" list-style="none" compact="compact"><li><figref idref="f0001">Fig. 1</figref> shows a pin tumbler cylinder lock key in side and top view.</li><li><figref idref="f0001">Fig. 2</figref> shows a custom pin tumbler cylinder for rim and mortise locks.</li><li><figref idref="f0001">Fig. 3</figref> shows a custom pin tumbler cylinder for key-in-knob(or lever) locks.</li><li><figref idref="f0001">Fig. 4</figref> shows a custom pin tumbler cylinder mostly for mortise locks.</li><li><figref idref="f0001">Fig. 5</figref> shows a custom arrangement for a cam of a cylinder for mortise locks.</li><li><figref idref="f0002">Fig. 6</figref> shows custom fittings to a, here "oval", cylinder lock.</li><li><figref idref="f0003">Fig. 7</figref> shows new contrivances to a cylinder lock according to the invention.</li><li><figref idref="f0004">Fig. 8</figref> shows a custom arrangement for a driver bar, "tailpiece", of a cylinder.</li><li><figref idref="f0004">Fig. 9</figref> shows a for this invention modified individual key device in side view.</li><li><figref idref="f0004">Fig. 10</figref> shows a generic key device according to one aspect of the invention.</li><li><figref idref="f0005">Fig. 11</figref> shows a with a key device of <figref idref="f0004">Fig. 10</figref> associated reader device(-part).</li></ul>

Description of preferred embodiments

0008With reference to the drawings, preferred embodiments of the present invention will hereinafter be nearer explained, by means of example.

0009The model key drawn in side and top view in <figref idref="f0001">Fig. 1</figref> shows a (pin tumbler) cylinder lock standard key with bow (1), shoulder (2), blade (3), keyway groves (4), mechanical encoding, "cuts" (5) and tip (6). In specific addition is at/in the bow of this here version put an RFID (or other code carrier format) circuit, here as a clip at the bow and through which the key is given individually programmable credentials (7). This can be done also as retrofit, and keys keeps their mechanical properties.

0010Also other cordless/proximity "card"/reader formats, e.g. Wiegand, can be employed; and key circuits included - in manufacture or by an authorized party at retrofit - in such a way that attempts to remove or replicate it, destroys it, thus in all making it impossible to unauthorizedly make or use duplicate (or pick) keys.

0011The credentialing (cordless) code-carrier of/to a key can also be an external accessory, e.g. key holder, badge, Bluetooth/NFC(Near Field Communication)-enabled cellphone etc., still and in cooperation with a reader device of the present invention enabling only valid keys to open and/or lock; and all in a traceable way.

0012A reader device according to herein described aspects and embodiments of this invention, is partly a reader (electronic) for e,g. RFID (or other employed code-carrier format) and partly a contrivance (electro-mechanical) for allowing key devices according to this invention to carry through a lock/unlock operation; and which not (as distinguished from prior art) in any way calls for changing a cylinder.

0013With modem keys and locks; and most commonly pin tumbler cylinder locks, which here (not excluding other models) are chosen for non-limiting describing exemplary versions, highly secure, yet generic, uncomplicated, cost-efficient and advantageous rearrangements are realized through the present invention.

0014These modern locks are quite modular and standardized so that the key accepting modules, in this here described case the lock cylinders, mechanically are very similar; and to move the lock bolt have a standard coupling arrangement (<figref idref="f0001 f0002">Figs. 2-6</figref> examples) linked thus to the lock bolt that when a cylinder rotates, bolt moves along (<figref idref="f0002">Fig. 6</figref> exemplifies, among others, a common such ). The cylinder rotates by the key turn, not requiring, nor is the key capable of, much power.

0015However, to move the bolt from the inside (since a key cannot be inserted in the lock from that side) a so called lock knob is usually provided, which functions also when the cylinder stands still, by virtue of various arrangements whereof one is exemplary illustrated in <figref idref="f0002">Fig. 6</figref>. Now, if according to one preferred embodiment of this invention the cylinder is rotationally caught by a contrivance as exemplified in <figref idref="f0003">Fig. 7A</figref>, an inserted, even mechanically correct, non-credentialed key is blocked from rotating the cylinder and thus operate the lock. At the same time, the lock knob can operate unaffected, as is also the case with a version exemplified below.

0016In such version, an example of which is rendered in <figref idref="f0003">Fig. 7B</figref>, the cylinder can rotate, but only at command will such rotation be transfered to move the bolt. It can however in both these versions be sensed/alarmed etc. if an unauthorized party is attempting to enter; and an event log can be kept of all authorized entries.

0017The below nearer described embodiments, are electromechanical parts of a reader device embodiment, exemplary and non limiting herein disclosed; and are external to the cylinder and thus implementable without changing same. They are preferably always in catch respective disengagement by constructions as in <figref idref="f0003">Fig. 7</figref> A/B and release/catch by order of a reading part of the present invention when an according to this invention credentialed key inserts in the keyway of the cylinder.

0018<figref idref="f0001">Figs. 2-5</figref> are schematic and will just show/illustrate appearance etc. of some here employed locks. Of special interest here is the so called tailpiece 21 (64), which transfers the rotation of the cylinder via the coupling device to the lock bolt.

0019Also <figref idref="f0002">Fig. 6</figref> provides general background for herein described embodiments. In top view is seen a standard coupling device 61, and also how it can move a bolt 62 upon rotating. From rear of the lock cylinder, "plug" 63, seen (with its "case") in front/back (a1/a2) and side (b1/b2) views, a bar, "tailpiece" 64, inserts halfway deep in the hole 65. From the other side of the door a, here cross-shaped, bar-end (66) from a lock knob inserts, also halfway deep. When plug turns (here 90°; other angles and thus other 61 constructions exist, but this description is intended to be exemplary also for such; and with from case to case dependent design variation), 61 will rotate, moving 62 along. Object and design of a coupling device, as 61, is, as noted in the art, to allow plug and door knob to actuate lock independently.

0020Matters as per above are according to hereinafter described embodiments, used for either deadlocking the plug, or uncoupling it from 61, for not credentialed keys. It should be stated that the in <figref idref="f0003">Fig. 7</figref> A/B illustrated electromechanical parts of a reader device embodiment according to the invention, are construed primarily for mortise locks and for simplicity (also to describe), yet demonstrating intended working to show and affirm the method's validity; and that other construction may be contrived, esp. for different types of locks, e.g. rim locks, "key-in-knob" locks.

0021Among the standard accessories to cylinder locks of here nearer described types, is a so called cylinder lengthener, which does merely what it is called. It is in <figref idref="f0002">Fig. 6</figref> indicated as 67 till the dotted line 68 which indicates where attached. It is inserted between the cylinder and the coupling device 61, due to thick doors etc.; is about 10 mm thick and contains just an extension to/of 64. If the cylinder then gets so long that its front, with "keyway" 60, stretches out of the door, there are other standard accessories to envelope it, so called cylinder rings, 69, of various depths, which can cover any protruding (caused by insertion of 67; also then 69 can house a possible reader antenna, as well as later herein described galvanic contact points). These and other standard accessories or parts herein accounted for, are standardized and easy to insert and/or mount, also for an end user.

0022The described preferred embodiments A, 71 and B, 72 of <figref idref="f0003">Fig. 7</figref>, are shown in side view and axial top-to-bottom mid section; and are shown inserted in lieu of a lengthener 67 to a cylinder also shown, with key and cylinder ring (69). They are shown in states <u>a</u>: lock operable and <u>b</u>: lock inoperable; for a mechanically correct key. The drawings are exemplary, schematic and illustrative; and dimensionally not exact, esp. 71/72 are greatly length exaggerated to facilitate illustrating their working. Whereas in these illustrated embodiments, the true length should be about 10 mm to correspond to a standard lengthener, a standard door aperture for a cylinder lock allows for much more radial (when rim locks also more longitudinal) space, which can be used to house parts of for these embodiments for mortise locks needed mechanisms, whereof two (71/72) are below nearer described.

0023A cylindrical rod or plunger, 73, here (as in all drawings) cut open through its vertical middle, enclasps a here shown divided and so lengthened (a whole long bar is here also possible) tailpiece/bar 64, thus rotationally reuniting it (<figref idref="f0003">Fig. 7 A)</figref>. In <u>b</u> state, 73 is here shown having a hole 74 checked (filled) by a ferromagnetic rod 75 kept out by a spring 76 and released when, on command, a solenoid, 77, draws in 75; and which then allows rotation of the cylinder cum tailpiece (state <u>a</u>).

0024In 7 B, 73 is (ferromagnetic and) axially slideable along and over a gap in 64 and by spring 76 normally (<u>b</u>) in a position off the 64 rear extension thus, that even if the plug rotates, 64 won't. Only when (<u>a</u>), on command, - e.g. on reading a credentialed (and mechanically correct) key - solenoid 77 draws, that can happen.

0025Although solenoids here have been chosen for moving the parts, it is seen that other effectors and linkage, such as electric motors, bi/memory metal on impulse and heat, hydraulics, pneumatics etc., can work well also.

0026These versions of the mechanically active parts of a reader device according to this invention, are to be placed at the cylinder side of a lock house and thus for space reasons preferably in a distributed installation, separate from other parts of the reader device, just needing impulse and power, e.g. electric, to work.

0027Which of these versions (or possibly other constructions which will perform equivalent functions, e.g. a cam instead of a tailpiece to move the lock bolt; in 7B alter from, on activation, embracing the cylinder tailpiece part instead, e.g. by also then shifting solenoid's etc position towards the cylinder side; tailpiece's sectional view and thus also the sleeve's cavity of different shape; etc.) to chose, may be a matter of fitness; it is by above description seen and shown that functionality is as meant and that a lock knob will work well in both cases; and that any switch closure causation, such as e.g. sensing a credentialed key, may enact the device.

0028More complicated and thus not preferred, would be to place functionally similar arrangements at the lock knob side of the (mortise) lock house. Still, they are possible and there might be instances where they will fit; and thus a brief on two such versions will be given. There are in the market standard cylinders with extra long tailpiece; and also tailpieces are very easy to change by just loosening a clip (<figref idref="f0004">Fig. 8</figref>). A long bar can pass 65 and be checked/released at the other side. For a lock knob, some fork-like arrangement can be contrived.

0029To disengage from the cylinder is also possible. One version could be to remove the ordinary tailpiece and (from other side of the lock) make a matching tap go into or out of the, typically, slot in the cylinder rear end that is for holding the ordinary tailpiece (<figref idref="f0004">Fig 8</figref>). For a lock knob can be arranged as per above.

0030Whereas the disclosed key enabling mechanisms just need an on/off command to act, the logical checking of credentialed keys, i.a. for giving relevant such command, is done by the sensing/evaluating/steering part(s) of the reader device according to the present invention. By an antenna (and adequate design, program etc.) it can read the credentials of a key cordlessly, when key is inserting. The keys can however be wanted encoded in other digital formats than cordlessly transferable, then bound to have galvanic contact points to electronic/logic parts, preferably at the key bow; and also here the method of this invention will work.

0031When an existing key is to be exchanged for a credentialed one, one can start from a key blank; and then keep same mechanical pattern, cuts, whereas a needed variance for putting galvanic contact points can be done at key shoulder.

0032With reference to <figref idref="f0004">Fig. 9</figref>, an exemplary preferred embodiment will now be described. Key 91 has a longer shoulder (92) than usual and continues then in ordinary way. On it needed contact point(s), 94, is (the metal of the blade can be another lead) /are put. Any needed number of points; and side of key is possible. (It could be noted that in <figref idref="f0003">Figs. 7</figref> and <figref idref="f0004 f0005">9-11</figref> also a cordless clip (7) is shown on the key, because to the mechanical operation, the electronic code format is all one).

0033Since according to described embodiments of this invention, a (mechanically correct) key isn't hindered from inserting, but, if not credentialed, hindered from operating the lock, the contact point(s) can make contact with the reader upon full insert. Thus, the keyway can be outwardly extended by two lips or a slot, wherein the corresponding contact leads, points etc. (610) from the electronic part of the reader device can reside. These parts (610) are preferably included in a cylinder ring (and rotate along with a key) rather than be put on the cylinder.

0034The galvanic contact allows then for digital encoding formats not suitable for cordless transfer, as well as it can provide the possibly needed electric power (in lieu of batteries in the key) to the digital circuits of the key, preferably located in its bow. Needed power is very less and thus the reader device can supply, even if it self is battery powered (RFID/Wiegand on the other hand, don't need own power).

0035When, in any version (the parts indicated as 610 in he cylinder ring 69, can stand for leads for corded formats; and as antenna for cordless formats), a correct code has been conventionally read, processed and approved, a mechanism such as e.g. A of <figref idref="f0003">Fig. 7</figref> is ordered to act. All of this can be done by distributed parts, but can also be included in e.g. a compound reader embodiment residing on the inside of the door, e.g. when rim locks and/or long range cordless formats are employed.

0036In systems such as <patcit id="pcit0022" dnum="WO2006098690A"><text>WO 2006/098690</text></patcit> and <patcit id="pcit0023" dnum="SE529017"><text>SE 529017</text></patcit>, aimed at substituting mechanically coded and 'motoring' keys by remote control, motor etc., the present invention can completely secure a retained cylinder lock by credentialing those keys that still remain with residents, relatives, house personell etc.; and if a mentioned motor/handle-mechanism is to be steered by some cord/cordtess "card" reader device, it is realized that a reader device of this invention can serve also that purpose; empowering a key for this code; and a motor, handle etc. for that. Same code carrier can be used for both systems and combinations/hybrids are possible, where a motor/handle mechanism employes one format, e.g. card/code, biometry, IR/RF, Blutooth/NFC, and a credentialed key employs other, corded/cordless (or both as in the drawings); or (also when used alone) has its own on board code carrier(s), complemented by exterior carrier(s), e.g. a Bluetooth/ NFC cellphone.

0037To be able to eliminate a need for expensive and complicated motor/handle etc. devices and overall rely on the 'motoring' of a mechanical key, would be a great advantage. But motive for systems like <patcit id="pcit0024" dnum="WO2006098690A"><text>WO 2006/098690</text></patcit> is to eliminate need for complex key administration and handling which staff, like e.g. home-care nurses, meet when visiting a number of residences with between themselves different locks; and thus, absent such systems, have to carry a lot of different keys.

0038One object of the present invention is to here provide a new, universally useable and "motoring" key device (10) for all the according to this embodiment of the invention reader-equipped locks, while at same time letting the locks' ordinary and individual as per the present invention credentialed keys work as before.

0039To move a lock cylinder mechanicly, its key must have the right cuts. One for different locks working key, though, cannot possibly have the cuts to be able to move those different cylinders. Thus it must be able to work over a static cylinder.

0040By slight modification of the reader device embodiments of <figref idref="f0003">Fig. 7</figref>, one exemplary preferred reader device embodiment is rendered, which will accept both generic and individual as per this invention credentialed keys. With reference to <figref idref="f0005">Fig.11</figref> and a separate key device, <figref idref="f0004">Fig.10</figref>, one will be nearer described later below.

0041A such key device (10) of this invention, one preferred embodiment of which is illustrated in <figref idref="f0004">Fig.10</figref> and shown equipped for both corded and cordless formats, works on the fact that the keyway of esp a pin tumbler cylinder lock (and other types, such as disc tumbler ones, here meant included, alhough construction then may differ) is going all through the plug, ending by an arrangement, as e.g. and typically the one indicated in <figref idref="f0004">Fig.8</figref>, for retaining a tailpiece, other driver bar or cam; and that, non with standing its folds, it is readily penetrated all through by a suited thin e.g. metal/plastic blade and/or an about 1 mm thick (cylindric) shaft.

0042In a key's way are the pins (or discs etc.) which are passed by the beveled key tip/cuts; and thus to allow all-through passage, all pins (etc.) must be able to go up and away enough from the keyway, although, as well known in he art, they typically won't allow the cylinder to rotate when they all are in such position.

0043Thus, as can be seen in side wiew (a) in <figref idref="f0004">Fig. 10</figref>, the there exemplified and preferred embodiment of a key device according to this invention, has eliminated all cuts, thus making it universal for all locks of a kind. Since pin tumbler locks are practically the only type now installed at residencies etc.; and moreover are of very similar, almost standardized proportions, one or very few key devices of this here described type should suffice for an area, district, province etc., just having to (with some tolerance) fit into a keyway and work in spite of that a cylinder won't rotate.

0044According to described embodiment the tip (16) is separated from the blade (13) and instead like an arrow-head merged in an about 1 mm thick peg or shaft (15) which in its turn is fixed to the bow (11) while rotate-able going through the shoulder (12), thus rotating when 11 turns while 12 and its blade (13) stand still.

0045Shaft 15 should be made from very strong material: metal, reinforced plastic, ceramics etc. (a one mm insex-key comes to mind for high torque); blade 13 is divided into two, supporting 11 and keeping the lock pins up for taking out the key.

0046Length of a cylinder depends on number of pins (discs etc.), predominantly 5 or 7 pins (a difference of about 8 mm). Since this difference isn't discernible from the outside, a preferred key device embodiment should have such long blade that it can be fully inserted in the 7 pins (longest) cylinder, while being property stopped from further insert into the shortest one (as will be later herein expounded; <figref idref="f0004">Fig 10</figref>, however, will just illustrate a key device proportioned to a 5 pins lock). For the corded code transfers contact points 94, this will have some design consequences (solvable, but not further herein treated), while cordless formats stay unaffected.

0047<figref idref="f0002">Fig. 6</figref> shows the all-pervading bottom L(+ inversion)-profiles of keyways, discernible from the outside. Taking that into account, two versions of a key device 10 can be provided, one for each "L-course", which makes for a thicker and thus steadier blade bottom, better supporting the shaft and maybe eliminating need for a top blade part; the cylinder pins just slightly lifted when a here polled 16 goes in and out. Such variation is not here nearer described, just mentioned as example of possible variants which all are meant included in the present inventive thought.

0048The front view (<figref idref="f0004">Fig. 10b</figref>.) of tip and blade, shows the thinner blade and thicker shaft. The arrow-head tip is forged in one solid piece whereas blade and peg are separate parts; the blade's two toungues flanking and supporting the peg. Behind, the thicker shoulder and the even thicker bow with clip are indicated.

0049To further explain the working, reference is now made to <figref idref="f0005">Fig. 11</figref><u>a</u>, <u>b</u> and <u>c</u>. <figref idref="f0004">Fig. 8</figref> shows how a tailpiece usually looks and is held to the cylinder. It is thus perpendicular to the key and detach-ably held by a dip, thus replaceable by a to <figref idref="f0003">Fig. 7</figref> similar contrivance and plunger device. In a version resembling <figref idref="f0003">Fig. 7A</figref>, rod 75 is filling out hole 74 of plunger 73, thus preventing both rotation and length movement, until activation. Instead of held by a clip (if clip also held the cylinder, a clip with just such function should substitute), 73 is pressed against it by spring 76; and entering its holding slot 8 in the cylinder preferably just by two spikes 9, thus leaving its rear center area free for a slot formed after the "arrow-head" 16 and (with some tolerance) accepting its insertion to a predefined point. Bar 64 has just a hind part and 73 can slide along over it, always transferring any axial turn.

0050As (<figref idref="f0005">Fig.11</figref><u>c</u>) an approved and individual as per this invention credentialed key, having also the right mechanical code cuts, enters, a thereafter withdrawn 75 allows transfer of the cylinder's rotation (if hole 74 instead is a fittingly long groove in 73's periphery, it is seen that a mechanically correct, but not credentialed key can actuate instead, if so is desired); and when (<u>a</u>, <u>b</u>) an approved and generic according to this invention credentialed key device as of <figref idref="f0004">Fig 10</figref> (not having any mechanical code cuts) wants to actuate the lock, a withdrawn 75 (a) also allows this, without any rotation of the cylinder, following procedures as below explained.

0051The shoulder could have (not shown in <figref idref="f0004">Fig. 10</figref> and apart from herein earlier disclosed features such as contact points) an enlarged portion facilitating holding it when inserting the key device into the lock. When the key blade stops at the cylinder end (when 73 still is not released), the "arrow-head" tip becomes fully inserted in the slot in 73 and thus, being flat, able to axially rotate same upon key (bow) turn, should not 73 be blocked. (If a for varying number of pin tumblers version, as earlier herein discussed, is employed, shoulder would in shorter cylinder versions not be fully inserted and measures as indicated earlier may be taken; functionality remains, though; and in <figref idref="f0004 f0005">Figs. 10-11</figref> full insertion is assumed.)

0052The bow with rod has now an axial play vis-a-vis the shoulder the few mm:s it takes to free the e.g. spikes of 73 from the hold in the cylinder's holding slot; and is furthermore turnable vs. the shoulder but is blocked from utilizing these features by rod 75 (<figref idref="f0005">Fig.11</figref><u>b</u>). If however being credentialed for the lock, by own or separate means, e.g. a cellphone with NFC, 77/75 on proper command will release 73 and thus allow it to slide off its hold and transfer rotation to bar 64 upon pressing in and turning the key-bow; and this, then, without rotation of the cylinder (<figref idref="f0005">Fig.11</figref><u>a</u>).

0053If a latchbolt lock is present, the key most often revolves back automatically and can be immediately taken out; if a deadbolt lock is present, the key will have to be turned back for being taken out and also the lock has to be actively relocked; in all cases, 73 and its slot (and door knob) will come right for any next operation.

0054To be able - and esp. with mortise and key-in-knob locks - to work within an actual, likely restrained longitudinal room - about 10 mm for a standard cylinder lengthener and possible cylinder ring further extension - may in some respects call for precision "clockwork" techniques and strong materials, however in relation to to-day's nano technology still in a macro format and fully achievable/available. To avoid over-stress on a shaft 11, for instance, it can be attached to its key bow per a friction coupling, if an enough strong material for it unlikely isn't found. Also, a cylinder lock should not need much force to actuate; if obstructing, the problem is normally in the door, and the familiar remedy is to treatlpush/pull/etc. the same. A shaft 11 can be freed for rotation (on 73 release) e.g. by sliding in vs. the key shoulder (as in in <figref idref="f0004">Fig 10</figref>), or further insert whole (not slideable vs. 12) key device. For emergency exits etc., reverse function, i. e. obstruction on power, is possible.

0055The preceding disclosure is for practical reasons held in relation mostly to tailpieces/bars for driving the bolt and allow for a door knob (esp. with mortise locks; most rim- and key-in-knob locks will have arrangements for a such inbuilt); and it is from <figref idref="f0001 f0002">Figs. 2-6</figref> seen that a tailpiece/driver bar (with case-to-case measure modification) is being commonly employed for rim, mortise as well as key-in-knob locks. Some mortise locks use a cam in lieu of a tailpiece (<figref idref="f0001">Fig. 5</figref>) to move the bolt. It is seen, but not herein nearer unfolded, that arrangements analogous and/or similar to earlier herein explained contrivances can be made also for a cam, being in effect merely a form/shape variant of an ordinary tailpiece/driver bar.

0056For i.a. such reasons, the here presented drawings, nearer description etc. have been done in most general terms. The disclosed methodology allows, and variety of custom locks calls, for much variance in exact (electro)mechanical and electronic construction. Parts of or whole lock devices can be factory ready-made, or retrofits by parts effected at site. It is thus to be understood that the disclosure herein, apart from providing a base for the pending claims, is of a non limiting, for the skilled person explaining and illustrating, nature mostly; and that based on this disclosure and given insight, at least the skilled person is enabled to range quite much, but without so departing from the present inventive thought and claims.