Source: http://www.google.com/patents/US4836002?dq=552685
Timestamp: 2016-12-05 12:48:42
Document Index: 658838705

Matched Legal Cases: ['art 4', 'ART 4', 'art 4', 'art 5', 'art 5', 'art 5', 'ART 5', 'art 5', 'art 5', 'art 5', 'art 6', 'ART 6', 'art 6']

Patent US4836002 - Programmable lock apparatus and method - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA lock apparatus includes a lock provided with a cylindrical plug having a set of blind holes angularly spaced from the set of pinways in the plug. A longitudinal slot through the center of the blind holes accepts a programming member that lifts one or more master pins out of the blind holes and into...http://www.google.com/patents/US4836002?utm_source=gb-gplus-sharePatent US4836002 - Programmable lock apparatus and methodAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS4836002 APublication typeGrantApplication numberUS 07/070,350Publication dateJun 6, 1989Filing dateJul 1, 1987Priority dateJul 1, 1987Fee statusPaidPublication number070350, 07070350, US 4836002 A, US 4836002A, US-A-4836002, US4836002 A, US4836002AInventorsBrian J. MonahanOriginal AssigneeMonahan Brian JExport CitationBiBTeX, EndNote, RefManPatent Citations (12), Referenced by (112), Classifications (14), Legal Events (6) External Links: USPTO, USPTO Assignment, EspacenetProgrammable lock apparatus and method
FIG. 3 is an elevational view of the front end of the modified lock shown in FIG. 1 illustrating the plug rotated 90° into a programming position;
FIG. 6 is a vertical transverse cross sectional view taken along the section line 6--6 in FIG. 3 wherein the plug has been rotated 90° to align a series of blind holes with the housing portions of standard pinways, showing the removable set blade in a slot formed in the plug, the set blade having a contoured edge at the A station for positioning two master pins in the housing portion of the A station pinways;
FIG. 19 is a view similar to FIG. 18, in which the set rod has been rotated 90° into a second rotary position;
The first preferred embodiment of the lock apparatus of the present invention is illustrated in FIG. 1 as including a lock apparatus 30 that may be used to perform the method of the present invention to modify a standard pin tumbler lock 31 to render it programmable. When modified, the standard lock 31 is referred to as a modified lock 32. The modified lock 32 may be rekeyed without disassembling the lock. The lock 31 is referred to as a "standard" type lock since the unmodified structure is standard in the industry, and may be in the form of the key-in-knob lock shown in FIG. 1 or the standard pin tumbler padlock cylinder 33 shown in FIG. 21. A plug 34 of the standard lock 31 generally rotates at least 90° from a locked or locking position to an unlocked position. If the modified lock 32 is rekeyed for use of a particular change key (referred to generally by reference number 35), such as a first change key 36' (FIG. 9), the rekeying renders the lock 32 usable only with a second, randomly selectable change key 36" (FIG. 10) and not with the first change key 36' (FIG. 9).
The master key 61 is used to rotate the plug 34 90° clockwise into the programming position shown in FIG. 13 at which the blind holes 50--50 are aligned with the housing portions 40--40 of the pinways 42--42. A programming member 54' (FIG. 6), which is marked SB1 (see FIG. 6) to indicate use with the C1 change key 36', is removed from the slot 55 and is exchanged for an SB6 programming member 54" (see FIGS. 7 and 14) which is inserted into the slot 55. The SB6 programming member 54" is selected as described later to randomly rekey the modified lock 32. Here, the SB6 programming member 54" has been selected and renders the modified lock 32 usable with the C6 or second change key 36". As shown in FIG. 7, the SB6 programming member 54" positions only one active master pin 47 above the shear interface 46 in the A station pinway 42 and positions one active master pin 47 above the shear interface 46 in the F station housing portion 40 of the pinway 42. The master key 61 is then used to rotate the plug 34 90° counterclockwise back to the locking position. At that time, the A station pinway 39 shown in FIG. 11 will only have one active master pin 47, as shown in FIGS. 7 and 10. The rekeying method is complete without disassembling the modified lock or removing it from a door (not shown). Since none of the structure of the standard lock 31 is removed from the modified lock 32, the method of rekeying is said to be accomplished without removing any master pins from the modified lock 32, and in this sense the exchange of the SB1 and SB6 programming members 54' and 54", respectively, is not considered removal or addition of any master pins.
When the programming members 58 and 60, of the respective fourth and fifth embodiments (FIGS. 2 and 21) are used in the rekeying method, and when the master key 61 has rotated the plug 34 to the rekeying position (FIGS. 18, 19 and 21), a flat ended tool, such as a screw driver (not shown), is used to rotate the programming members 58 and 60 90° or 180° or 270°, to transfer the master pins 47--47 from the blind holes 50--50 according to one of three or four other arrangements, such that the modified lock 32 is rekeyed for use with any one of two or three respective other change keys 36' or 36" or 36'".
Referring to FIGS. 1 and 6, the modified lock 32 of the present invention uses the housing 38, which is a standard, unmodified part of the standard lock 31. The plug 34 is shown in FIGS. 1, 7, 13 and 14 rotated 90° from the original position (shown in FIGS. 11 and 12) into the programming position, so that the blind holes 50--50 are aligned from a rotary standpoint with the housing portions 40--40 of the pinways 39--39. Each of the blind holes 50--50 has a diameter and a depth sufficient to receive one or more of the master pins 47--47, according to the maximum quantity of master pins 47--47 that have been selected for use in a given one of the pinways 39--39. FIG. 1 shows each blind hole 50--50 designed to receive two master pins 47--47 so that the upper or top surface 48 of the top master pin 47 is just below the shear interface 46 (see, for example, the B station shown in FIG. 15). In particular, the master pins 47--47 can each have a diameter of 0.115 inch and each is 2-depths, or 0.030 inch in thickness, and each blind hole 50--50 in FIGS. 1 and 11 through 14 is dimensioned to receive two of such master pins 47--47.
Referring to FIG. 2, the set rod 58 is shown having a longitudinally extending outer surface 97 that has four different and selectable longitudinal contours. The four different longitudinal contours are located at angularly spaced positions around a central axis 98 of the set rod 58. The angular positions are referenced from a vertical axis 99 through which the set rod 58 is rotated and are at 0°, 90°, 180°, and 360° from such vertical axis 99. For convenience and as described below, the longitudinal contours of the set rod 58 are set forth in Chart 4, where the angular position is noted in terms of degrees from the vertical axis 99 and the longitudinal sections 96 are designated with the A through F station letters.
CHART 4______________________________________Description of Set Rod 58AngularPosition   Station(Degrees)  A     B        C   D      E   F______________________________________ 0° 2     2        2   2      2   2 90°      2     2        2   0      0   0180°      2     2        0   2      0   0270°      2     2        0   0      2   0______________________________________
The set rod 58 is designed to be reversible, in the manner of the reversible set blade 57. To permit removal of the set rod 48 and the exchange of it for another set rod 58 or reversal and re-insertion of the same set rod into the slot 59, at 0° the A through F station sections 96 of the set rod 58 have a full (shown as "2" in Chart 4) height H2 (see FIGS. 18 and 19) equal to the full radius of the set rod 58. As may be understood from FIG. 18, the full (or "2") height H2 at section A lifts the A station master pin 47 into the housing portion 40 at the A station. As shown in FIG. 2, with all of the A through F sections 96 having a full height H2 at the 0° position, the set rod 58 is easily removable and re-insertable since no master pin 47 will fall below the shear interface 46 as the set rod 58 is moved longitudinally.
The 90° position of the set rod 58 shown in FIG. 2 is identified by horizontal arrows that point to the right and are marked A, B, C, D, E and F to indicate the A through F sections 96. As shown in FIGS. 2 and 18, the "O" height H0 at the D, E and F sections allows the master pins 47--47 at those stations to be in the blind holes 50--50 at those stations, so that they will be inactive. In a similar manner, when the set rod 58 has been rotated to the 180° position the A, B and D station master pins 47--47 will be active and the C, E and F station master pins 47--47 will be rendered inactive. At the 270° position identified by horizontal arrows that point to the left and that are also marked A, B, C, D, E and F to correspond to the A through F sections, the set rod 58 will render only the A, B and E master pins 47--47 active.
As a specific example of the C station sections 96 of the set rod 58, reference is made to FIGS. 17A through 17D. The set rod 58 is shown cut away at section C leaving one quarter portion of the set rod 58. The quarter portion has the full "2" height H2 in the 0° and 90° positions, such that the master pin 47 at the C station is above the shear interface 46, is in the C station housing portion 40 of the pinway 42, and is thus active. Rotation of the set rod 58 to the 180° position (FIG. 17C) allows the master pin 47 to move into a cut 100 in the set rod 58, to move below the shear interface 46 and thus into the C station blind hole 50, where it is retained by the opposed arcuate walls 91--91 (FIG. 2) as an inactive master pin 47. Rotation of the set rod 58 to the 270° position has the same result, as shown in FIG. 17D.
Series 101 of Set Rods 58 and Change Keys 35 Using six different set rods 58, the modified lock 32 can be rekeyed for use with a series 101 (FIG. 2) of eighteen different change keys 35 when six 2-depth master pins 47--47 are used as shown in FIG. 2. The series 101 of set rods 58 that render such modified lock 32 so rekeyable is defined in Chart 5 below and the one set rod 58 shown in FIG. 2 is one set rod of such series 101. The data in the column headed "Active Master Pin Positions" defines how many master pins 47--47 are active in a given one of the A through F stations. The M master key 61 is defined on the first line. For reference, the second line in Chart 5 corresponds to FIG. 18 where one 2-depth master pin 47 in each of stations A through C is active. The data in the column headed "Set Rod Sections" indicates the height H2 or Hφ of the section 96 of the outer surface 97 at a particular one of the A through F stations at the designated set rod angular position for a given set rod 58. There, "2" indicates the A through C station heights H2 in FIG. 18 and "0" represents the height Hφ (see FIG. 18, stations D through F). The data in the third line of Chart 5 is for the SR1 set rod 58 when it has been rotated 90° further to the 180° position shown in FIG. 19.
CHART 5__________________________________________________________________________Data for Series 101 of Set Rods and Series ofChange Keys for Use with Modified LockActive                       Set RodMaster Pin       Set Rod     Angular                              Change Key  ChangePositions   Set Rod            Sections    Position                              Bittings    KeyA B C D E F Number            A B C D E F (Degrees)                              A B C D E F Number__________________________________________________________________________                              5 4 3 2 1 0 M2 2 2       SR1  2 2 2 0 0 0  90°                              7 6 5 2 1    0                                      C12 2   2     SR1  2 2 0 2 0 0 180°                              7 6 3 4 1    0                                      C22 2     2   SR1  2 2 0 0 2 0 270°                              7 6 3 2 3    0                                      C32 2       2 SR2  2 2 0 0 0 2  90°                              7 6 3 2 1    2                                      C42   2 2     SR2  2 0 2 2 0 0 180°                              7 4 5 4 1    0                                      C52   2   2   SR2  2 0 2 0 2 0 270°                              7 4 5 2 3    0                                      C62   2     2 SR3  2 0 2 0 0 2  90°                              7 4 5 2 1    2                                      C72     2 2   SR3  2 0 0 2 2 0 180°                              7 4 3 4 3    0                                      C82     2   2 SR3  2 0 0 2 0 2 270°                              7 4 3 4 1    2                                      C92       2 2 SR4  2 0 0 0 2 2  90°                              7 4 3 2 3    2                                      C10  2 2   2   SR4  0 2 2 0 2 0 180°                              5 6 5 2 3    0                                      C11  2 2     2 SR4  0 2 2 0 0 2 270°                              5 6 5 2 1    2                                      C12  2   2 2   SR5  0 2 0 2 2 0  90°                              5 6 3 4 3    0                                      C13  2   2   2 SR5  0 2 0 2 0 2 180°                              5 6 3 4 1    2                                      C14  2     2 2 SR5  0 2 0 0 2 2 270°                              5 6 3 2 3    2                                      C15    2 2   2 SR6  0 0 2 2 0 2  90°                              5 4 5 4 1    2                                      C16    2   2 2 SR6  0 0 2 0 2 2 180°                              5 4 5 2 3    2                                      C17 2 2 2 SR6  0 0 0 2 2 2 270°                              5 4 3 4 3    2                                      C18__________________________________________________________________________
Also, certain set rods 58 can be made reversible, having the bevels 93 on each end 92 thereof. For example, the SR1 set rod 58 at 90° is reversible end-to-end with the SR7 set rod 68 at 180°, so that upon end-to-end reversal one set rod 58 could program the modified lock 32 for both the C1 and C18 change keys 35. The following pairs of change keys 35 could be programmed for using the same set rod 58 based on the data in Chart 5: C2 and C17; C3 and C15; C4 and C10; C5 and C16; C6 and C14; C7 and C9; C8 and C12; and C11 and C13.
3. Rotate the set rod 58 to any new 90°, 180° or 270° position, or for removal, to the 0° position.
4. If the set rod 58 is to be exchanged or reversed, the set rod 58 is removed from the modified lock 32 and is reversed or is replaced with another set rod 58 of the series 101 of set rods listed in Chart 5. Using the SR1 set rod 58 as an example, when it is rotated to the 180° position shown in FIG. 19 the A, B and D station master pins 47--47 are rendered active, and no other 2-depth master pins 47--47 are active.
5. The master key 61 is then used for rotating the plug 90° counterclockwise so that the plug 34 is returned to the original locking position (FIG. 12, shown for the set blade embodiment).
As noted, if it is desired to rekey the lock 32 to a change key combination that is not available using the SR1 set rod 58, the SR1 set rod 58 may be exchanged by rotating it to the 0° position and removing it from the groove 89. Another set rod 58 may be selected at random and inserted into the groove 89 in the 0° position. Thus, the set rods 58 of the series 101 of set rods have A through F sections with interrelated contours and may be used for randomly rekeying the modified lock 32 by making reference to Chart 5.
The standard padlock cylinder 33 is shown in FIG. 21 with the plug 102 rotated about 45° in a housing 103 to a rekeying position. Four pinways 104--104 at stations A through D include housing pinway portions 105--105 and plug pinways portions 106--106. A driver pin 107 and a spring 108 are received in each housing pinway portion 105 and a tumbler pin 109 is received in each plug pinway portion 106. When the plug 102 is in an original or locked position similar to that shown in FIG. 11, the housing pinway portions 105--105 and the plug pinway portions 106--106 are aligned to form the A through D pinways 104--104. A master key, (not shown) is used to unlock the padlock cylinder 33 by moving master pins 47--47 above a shear interface 110 and thus, into the housing pinway portions 105--105. The plug 102 is then rotated into the rekeying position shown in FIG. 21.
In the modified padlock cylinder 33 shown in FIG. 21, the set rod 60 is designed to be "non-removable" as compared to the set blade 54 and the set rod 58 shown in FIGS. 1 and 2 respectively. The non-removable design permits rekeying the modified padlock cylinder 33 for use of four different change keys 35 since all four outer longitudinal contours (at 0°, 90°, 180° and 270° as defined in FIG. 20) of an outer surface 114 of the set rod 60 may be used for rekeying without regard for having one longitudinal contour that is full height as at 0° in the removable set rod 58 shown in FIG. 2.
In particular, the four different longitudinal contours of the outer surface 114 are located at angularly spaced positions around a central axis 115 (FIG. 20) of the set rod 60. The angular positions are referenced from a vertical axis 116 (FIG. 20) and are at 0°, 90°, 180°, and 270° from such vertical axis 116. For convenience and as described below, the longitudinal contours of the outer surface 114 of the set rod 60 are set forth in Chart 6 below, where the angular positions are noted in terms of degrees and the longitudinal contours are designated with the A through D station letters.
CHART 6__________________________________________________________________________Definition of Set Rod 60ActiveMaster  Set Rod Change KeyPin Positions   Sections           Bittings                   Change Set Rod AngularA B C D A B C D A B C D Key Number                          Position (Degrees)__________________________________________________________________________           3 2 1 0 M2 2     2 2 0 0 5 4 1 0 C1      0°2   2   2 0 2 0 5 2 3 0 C2      90°  2   2 0 2 0 2 3 4 1 2 C3     180°    2 2 0 0 2 2 3 2 3 2 C4     270°__________________________________________________________________________
The non-removable set rod 60 is shown in FIG. 20 having a front or external end 117 provided with a transverse slot 118. As in the other set rod 58, a tool such as a screwdriver (not shown) may be used to rotate the set rod 60 to select the particular rotary position desired for rekeying. Considering the 90° position of the set rod 60 shown in FIG. 20 (see arrows A through D), the "0" height Hφ at the B and D station contours allows the master pins 47--47 at those station contours to be in the blind holes 111--111 at those stations, so that they will be inactive. In a similar manner, at the 180° position the B and D station master pins 47--47 will be active and the A and C station master pins 47--47 will be rendered inactive. At the 270° position, the set rod 60 will render only the C and D master pins 47--47 active. Referring in detail to FIG. 21 and to Chart 6, the set rod 60 is there shown in the 0° position such that the A and B master pins 47--47 will be active.
3. The set rod 60 is rotated to any new 0°, 90°, 180° or 270° position.
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