in fig1 a first embodiment of the invention is illustrated , wherein a door 1 is positioned adjacent its frame 2 . frame portion 6 includes a bank of elongated latching fingers 4 which are pivotably mounted upon pivot pin 7 . a key card insert slot 8 is configured to receive a key card so that the code actuating portion of the card will be positioned adjacent the short finger portion 9 of finger 4 . at the terminal portion of the longer finger portion , a hook member is formed upon the finger which engages anchor member 11 , rigidly affixed to door 1 . the lock preferably includes a plurality of pivoted latching fingers which are actuated in the manner of the keys of a piano , and if the proper combination of fingers is actuated , all of the hook portions will clear the anchor member 11 and the door may thus be opened . now let it be assumed that a key card is inserted within slot 8 which has the proper combination of &# 34 ; bumps &# 34 ; or raised actuating portions . certain of the latching fingers will be actuated , and their hook ends 13 will clear the shoulders of anchor member 11 . these latching fingers comprise a first set having their hooks facing upwardly as indicated by hook 13 . other latching fingers which should be actuated in accordance with the proper combination , will also have their corresponding upwardly facing hook members moved downwardly due to the interaction between the card bumps and the short finger portion 9 . however , should one or more of the latching fingers which should not be actuated become actuated , their downwardly facing hook members such as 16 ( affixed to a latching member behind the member in the plane of the drawing ) will become engaged with the shoulder of the lower anchor member , 15 to prevent the lock from opening . thus in accordance with the illustrated embodiment of the invention , a first set of latching fingers having hook members extending upwardly , is interleaved with a second set of latching fingers having their hook ends extending in a direction 180 ° opposite to the direction of orientation of the hook members of the first set . thus the improper actuation of a latching finger will cause its downwardly extending hook member such as 16 to be downwardly displaced to maintain the latched condition , and furthermore the insertion of a tool into slot 8 to indiscriminately actuate fingers , will cause an actuated finger having a downwardly facing hook 16 to engage the lower anchor member to prevent the lock from opening . the insertion of the card having the proper placement of &# 34 ; bumps &# 34 ;, will cause all hook members of all pivoted latching fingers to clear the shoulders of both the upper anchor member and the lower anchor member and door 1 may be opened . a leaf spring 17 is advantageously provided to mechanically bias the shorter finger portion downwardly . the door preferably has a conventional door knob , so that when all of the hooks have cleared the anchor means , the owner of the inserted card - key presses against the door knob ( or the door if there is no knob ) to enable door 1 to be displaced to the left in fig1 . when the card - key holder has entered the premises he closes the door to cause the hook ends to again actuate the lock by being locked into the anchor means ( at 15 ), just after the hooks assume neutral positions as the door is being closed , due to the tapered portions 13 and 16 contacting the right hand portion of member 6 . when the card - key holder wishes to leave the locked premises , he actuates button 18 to in turn displace slide member 19 to the right to cause the hook ends to again assume the neutral position , enabling the holder to pull the door knob , or a projection upon the door if there is no knob , which will enable the door with the anchor members to clear the neutrally positioned hook ends . finger support member 10 maintains the proper positioning of finger portion 9 within slot 8 . in fig2 a second embodiment of the invention is illustrated whereby push button finger actuating means 21 may be actuated to cause clockwise pivoting of the latching finger about pivot member 7 to in turn cause hook member 16 to clear the shoulder 15 of anchor member 11 . the push button operates against the counter pressure of leaf spring 17 . as before , the improper actuation of a single latching finger having an upwardly facing hook member rather than a hook member oriented as illustrated , will cause such normally disengaged hook member to engage the upper shoulder 15 &# 39 ;, of anchor 11 . a holding latch finger spring 22 is illustrated which will maintain actuated fingers in the downward direction due to the ledge 23 formed therein . if an improper combination is actuated , a lock reset bar 24 is pushed to cause the upper portion of latching spring 22 to be displayed to the right , thereby to enable the counter clockwise rotation of the latching finger under the influence of spring 17 . this arrangement eliminates the requirement that the fingers of the operator remain positioned against the buttons up until the time of opening the door . in fig3 a currently preferred magnetically actuated embodiment of the invention is illustrated , having certain components corresponding to those described in fig1 . a card key 309 which could of course also comprise an identification card , has a plurality of ferro - magnetic inserts formed across the width of the card at selected positions , which manifests the combination of the lock . it is an important aspect of this embodiment of the invention that the magnetic material in the card not be permanently magnetized to produce large quantities of flux , because a card key having permanent magnets therein could erase magnetically recorded data in other credit cards or the like in the users wallet . slot 32 is configured to receive the key card 30 positioned so that the spots of magnetic material 31 will become aligned with permanent magnets 33 which are affixed to the short finger portions . it is an important aspect of this embodiment of the present invention , that the magnetic material 31 be positioned very close to the short leg of the latching finger so that the relatively slight mass of material formed within the thin card is able to cause counter clockwise rotation of the latching fingers through a small angle . if larger displacements of the finger portions would be required , as in the prior art , the resulting air gap and magnetic reluctance would be great , and a far greater amount of magnetic material would have to be formed in the key card , which is impractical since such cards would have considerable thickness . it is a further important aspect of the invention that the finger portions bearing the hook members preferably be relatively long , or at least longer than the portions bearing the magnets , so that displacement of the hook members is through a magnified distance relative to the relatively small displacement of the magnet portions of the fingers , thereby to reduce possible manufacturing tolerance problems mentioned earlier . also the separation of the magnetic material at one terminal portion of the finger from the hook member material at the other is significant , since the hook member should have different metallurgical characteristics than the magnet portions . let it be assumed that the latching finger having the downwardly extending hook 16 should not be actuated and upwardly extending hook 13 should be actuated . in this case a magnetic spot would be positioned on the card aligned with the finger in the plane of the drawing and counter clockwise rotation of the latching finger would cause hook member 13 to be released from the upper anchor member whereas a &# 34 ; no spot &# 34 ; condition at the adjacent finger would maintain the hook member 16 of the second finger in the disengaged position as shown in the drawing . should a magnetic spot be present however , counter clockwise rotation of the second latching finger would cause normally disengaged hook 16 to engage the lower portion of the anchor member and the lock would not open . thus in summary , all of the fingers of a first finger set to be actuated in accordance with a proper combination must be actuated , and if any fingers are actuated in the second set of fingers interleaved with the first set , the normally disengaged hook members such as 16 will become engaged , thereby to inhibit the opening of the lock . as before , the lock is opened from the inside by actuating button 18 , to cause the pivotable latching fingers to move toward each other to in turn maintain the hook members in the disengaged position with respect to the anchor members . in the embodiments illustrated so far , the combination of these lock mechanisms cannot be readily changed without disassembly of the lock mechanism . accordingly , the inventor has designed a resetable combination lock whereby the directions of orientation of the hook member may be selectively reversed in accordance with a new combination in a matter of seconds , and such a lock will be described in connection with fig4 through 7 , which additionally illustrate the use of the invention in connection with a rotary disk which could be coupled to a door knob . rotary disk portions 41 and 42 illustrated in fig4 may be mechanically coupled to a door knob , not shown . these disks have straight elongated slots 43 and 44 formed therein for receiving the hook members which comprise elongated slidable rods rather than those hook members shaped as disclosed in the preceding figures . in fig4 the latching finger comprises a rod member 48 which is slidably positioned within the terminal portion of the pivoted latching finger . the lock will be opened by causing counter clockwise rotation of the proper first set of latching fingers which have their elongated hook members 46 positioned within the slot formed in the left hand disk 42 as illustrated . all of the proper latching fingers must be actuated to cause hook members 46 to clear the slot . as before , the actuation of one or more improper latching fingers of the second set , interlaced with the first set , will cause the normally disengaged elongated rod members 48 to be positioned within slot 43 of disk 41 to inhibit the rotation of the door knob coupled to rotary disk 41 . fig5 illustrates the position of the latching fingers when the key card is inserted into the slot which has the proper combination to unlock the lock . the elongated hook members would preferably have a groove 51 formed therein which is positioned against a detent member such as spring element 52 , thereby to lock the relative position of the rod relative to the terminal portion of the pivoted finger . a second groove member 57 is formed within the pin for receiving the detent number 52 when the relative position of the rod with respect to the finger is changed . in fig6 the groove 51 is again illustrated together with second groove 57 for enabling the seating of the detent spring 52 within the second groove 57 rather than the first groove 51 upon the shifting of the relative position of the rod with respect to the terminal portion of the finger . the combination of the lock is readily changed by inserting a key pin 61 into aperture 60 shown in fig5 . this action causes the clockwise rotation of all of the latching fingers and , due to the positioning of the left hand rotary disc affixed to the now turned door knob , all of the elongated hook members will be shifted as shown in fig6 so that they point to the right , whereby detent spring 52 is seated within the left hand groove 57 of the pins . the pin 61 key is now removed and the new card key bearing the new combination is inserted into the slot to cause the actuation of a new first set of fingers in the counter clockwise direction . this action causes those fingers which are rotated counter clockwise to have the relative positions of the pin members shifted to the left due to the reaction forces of the inside surface of the right - hand disc against the pins . those fingers which are not actuated in accordance with the new combination , will have their elongated pins remain in the right hand position . upon removable of the new card key , the lock is now set in accordance with the new combination as shown in fig4 . as a result of this mechanism , disassembly of the fingers is not required , and the combination of the lock may be readily changed in a few seconds for the sake of convenience and to further effect savings in labor costs and downtime . the above described mechanisms could also be employed in connection with the hook members shaped in accordance with fig1 through 3 and suitable detent members may be designed by those skilled in the art wherein the hooks could be for example rotated 180 degrees angularly , rather than providing pins which are displaced by translation . the use of a straight slot formed in the rotary discs affixed to the door knob maintains the previously described design wherein the latching fingers are aligned in a convenient straight line configuration , rather than being positioned angularly . the term &# 34 ; anchor means &# 34 ; is to be construed as any element of any configuration coacting with the latching fingers to inhibit or enable opening of the lock . the term &# 34 ; fingers &# 34 ; is intended to cover any elements which perform functions similar to those described , and is not to be limited to thin elongated elements shown in the drawings . for example they could comprise l - shaped strips or wires which are translated rather than rotated between latched and unlatched conditions . while particular embodiments of the present invention have been shown and described , it is apparent that various changes and modifications may be made , and it is therefore intended that the following claims cover all such modifications and changes as may fall within the true spirit and scope of this invention .