CA1240530A - Lock-key system - Google Patents
Lock-key systemInfo
- Publication number
- CA1240530A CA1240530A CA000466926A CA466926A CA1240530A CA 1240530 A CA1240530 A CA 1240530A CA 000466926 A CA000466926 A CA 000466926A CA 466926 A CA466926 A CA 466926A CA 1240530 A CA1240530 A CA 1240530A
- Authority
- CA
- Canada
- Prior art keywords
- profile
- key
- variation
- incisions
- lock
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B19/00—Keys; Accessories therefor
- E05B19/0017—Key profiles
- E05B19/0029—Key profiles characterized by varying cross-sections of different keys within a lock system
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B19/00—Keys; Accessories therefor
- E05B19/0017—Key profiles
- E05B19/0041—Key profiles characterized by the cross-section of the key blade in a plane perpendicular to the longitudinal axis of the key
Abstract
ABSTRACT
A key for a lock-key system, particularly for a hierarchal lock system, is provided which has an invariable basic profile and a variation or system profile in which the invariable basic profile is allocated to the region of the key facing carrying the classification notches and has at least two profiled formations which cross the centerline of the key. The variation or system profile is allocated to the key region adjacent to the key spine.
Variations are provided in the system profile by longitudinal incisions having a rectangular cross-section.
A key for a lock-key system, particularly for a hierarchal lock system, is provided which has an invariable basic profile and a variation or system profile in which the invariable basic profile is allocated to the region of the key facing carrying the classification notches and has at least two profiled formations which cross the centerline of the key. The variation or system profile is allocated to the key region adjacent to the key spine.
Variations are provided in the system profile by longitudinal incisions having a rectangular cross-section.
Description
i~4~)Si~Q
The invention relates to a lock-key system particularly in a hier-archal lock system, and more particularly to a configuration arrangement for a key.
Lock and key systems are well known wherein the variation or system profile used to differentiate between master keys and subordinate keys is allocated to the facing region of the key, that is, to the region which carries the classification notches, whereas the section adjacent to the spine of the key is provided with an invariable basic or guide profile. The disadvantage of these allocations of variation and invariable base profiles results from the fact that the key channel must be kept limited to a straight line and must have a minimum width precisely in the region of the tumblers, this opening up possibilities for the introduction and actuation of picking or sensing tools.
The present invention avoids the disadvantage described above by reversing the placement of the variation profile and the invariable basic profile. Thus, the invariable basic profile is allocated to the region of the key facing carrying the classification notches and thus providing this area with at least two profiled formations, that is a paracentric profile formation, which cross the centerline of the key. Also, the variation or system profile is moved into the section adjacent to the key spine.
The advantage achieved by such a rearrangement is that the key channel thus comprises a dentate design in the region of the basic profile section which largely prohibits access by picking tools, the consequence thereof being that security against picking is considerably enhanced.
Thus, in accordance with one broad aspect of the invention, there is provided a lock-key system, particularly for hierarchal lock systems, wherein the keys are provided with an invariable basic profile and with a variation Pat/Pt/1386 S
~05~
profile comprising the improvement of: said invariable basic profile being contained in a region of a key facing carrying a plurality of classification notches and is provided with at least two profile formations which cross the centerline of the key; and said variation profile being positioned in a section adjacent to the key spine, said variation profile includes at least one safety rib profile projecting beyond a lateral face of the key; and said basic profile and variation profile are comprised of profile incisions which have a rectangular cross-section.
In accordance with another broad aspect of the invention there is provided, in a key for use in a hierarchal lock system with an elongated body having a spine portion and a facing portion carrying a plurality of classifi-cation notches, an improvement comprising: an invariable basic profile formed in said facing portion and a system profile comprising longitudinal incisions formed near said spine portion wherein higher order keys in the hierarchy have more incisions than do lower order keys.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is an end view of a prior art key.
Figure 2 is an end view of a master key embodying the principles of the present invention.
Figure 3 is an end view of a key subordinate to the key shown in Figure 2.
Figure 4 is an end view of an additional key subordinate to the key shown in Figure 2 which is supraordinate to the key shown in Figure 3.
Figure 1 shows an end view of a prior art key 1 in which a basic profile section 2 is allocated to the section adjacent to a key spine 3 and a variation profile 4 is allocated to the section adjacent to a key facing 5 provided with the classification notches. Possible profile variations are indicated in Figure 1 by dotted lines and it is evident that the key channel must at least comprise an opening 6 limited by a straight line in its basic shape in the region of the variation profile and having a minimum width, the straight line lying generally along a centerline 9 of the key 1.
A key 11 embodying the principles of the present invention is shown in Figures 2-4 which is quite distinct from the prior art key 1 in that an invariable basic profile 7 is now positioned in a key facing section 5' contain-ing the classification notches, and a system or variation profile 8 is in a section of the key 11 close to a spine 3~ of the key. The variation profile area 8 can extend from the spine 3' to the middle part of the key 11.
Figures 3 and 4 each show a key 12, 13 having many possible forma-tions of the variation profile. Specifically a plurality of protrusions or elevations 14 are provided along the part of the keys 12, 13 just below the spine 3'. The key 13 of Figure 4 has some of the same protrusions 14 as the key 12 of Figure 3, but not all of them. Key 13 may also be viewed as having more incisions than key 12, that is, a lack of protrusions being equated with an increase in incisions. Thus, key 12 is subordinate to key 13 in a hier-archal lock system in that key 13 will fit into all locks which can receive key 12 and then some. There are no locks which will receive key 12 but not key 13.
Key 11 is a master key over both keys 12 and 13 since all of the protrusions 14 have been removed. Thus, key 11 is a higher order key, the hierarachy and can fit into every lock which can receive key 13 or key 12 as well as others.
Common to each of the keys, however, is that they carry a basic profile 7 in the lower section, namely that of the key facing 5'. The basic profile 7, as shown in the illustrative embodiments, consists of a paracentric ~ a~635~
which crosses the center line 9 at 3 points indicated at points 15, 16 and 17. A key channel 10 in the lock which receives the basic profile 7 thus has a dentate course which largely prevents work with lock-picking tools.
An additional feature of the key which enhances the security against unauthorized opening of the lock is that the key contains at least one safety rib profile 18, that is, a profile that projects beyond the case or flat side of the key so that reworking of the key can only occur by means of applying additional material. Four safety ribs 14 are shown in the embodiments of Figures 2 through 4.
It is quite advantageous to fabricate the profile incisions and ele-vations 14 with a rectangular cross-section as is shown in the figures. This enables an economic manufacture of the keys and, as a consequence thereof, a multitude of variations can be undertaken because a very slight width of the profile incisions can be produced, for example, by means of milling disks.
Applicant has found that incisions which have a width of 0.6 millimeters can be incorporated in keys with surprising success. Thus, a large number of incisions can be made along the height of the key as is shown in the figures resulting in a large available variation in a multiple lock system.
As is apparent from the foregoing specification, the invention is sus-ceptible of being embodied with various alterations and modifications which may differ particularly from those that have been described in the preceding specification and description. It should be understood that I wish to embody within the scope of the patent warranted hereon all such modifications as reasonably and properly come within the scope of my contribution to the art.
The invention relates to a lock-key system particularly in a hier-archal lock system, and more particularly to a configuration arrangement for a key.
Lock and key systems are well known wherein the variation or system profile used to differentiate between master keys and subordinate keys is allocated to the facing region of the key, that is, to the region which carries the classification notches, whereas the section adjacent to the spine of the key is provided with an invariable basic or guide profile. The disadvantage of these allocations of variation and invariable base profiles results from the fact that the key channel must be kept limited to a straight line and must have a minimum width precisely in the region of the tumblers, this opening up possibilities for the introduction and actuation of picking or sensing tools.
The present invention avoids the disadvantage described above by reversing the placement of the variation profile and the invariable basic profile. Thus, the invariable basic profile is allocated to the region of the key facing carrying the classification notches and thus providing this area with at least two profiled formations, that is a paracentric profile formation, which cross the centerline of the key. Also, the variation or system profile is moved into the section adjacent to the key spine.
The advantage achieved by such a rearrangement is that the key channel thus comprises a dentate design in the region of the basic profile section which largely prohibits access by picking tools, the consequence thereof being that security against picking is considerably enhanced.
Thus, in accordance with one broad aspect of the invention, there is provided a lock-key system, particularly for hierarchal lock systems, wherein the keys are provided with an invariable basic profile and with a variation Pat/Pt/1386 S
~05~
profile comprising the improvement of: said invariable basic profile being contained in a region of a key facing carrying a plurality of classification notches and is provided with at least two profile formations which cross the centerline of the key; and said variation profile being positioned in a section adjacent to the key spine, said variation profile includes at least one safety rib profile projecting beyond a lateral face of the key; and said basic profile and variation profile are comprised of profile incisions which have a rectangular cross-section.
In accordance with another broad aspect of the invention there is provided, in a key for use in a hierarchal lock system with an elongated body having a spine portion and a facing portion carrying a plurality of classifi-cation notches, an improvement comprising: an invariable basic profile formed in said facing portion and a system profile comprising longitudinal incisions formed near said spine portion wherein higher order keys in the hierarchy have more incisions than do lower order keys.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is an end view of a prior art key.
Figure 2 is an end view of a master key embodying the principles of the present invention.
Figure 3 is an end view of a key subordinate to the key shown in Figure 2.
Figure 4 is an end view of an additional key subordinate to the key shown in Figure 2 which is supraordinate to the key shown in Figure 3.
Figure 1 shows an end view of a prior art key 1 in which a basic profile section 2 is allocated to the section adjacent to a key spine 3 and a variation profile 4 is allocated to the section adjacent to a key facing 5 provided with the classification notches. Possible profile variations are indicated in Figure 1 by dotted lines and it is evident that the key channel must at least comprise an opening 6 limited by a straight line in its basic shape in the region of the variation profile and having a minimum width, the straight line lying generally along a centerline 9 of the key 1.
A key 11 embodying the principles of the present invention is shown in Figures 2-4 which is quite distinct from the prior art key 1 in that an invariable basic profile 7 is now positioned in a key facing section 5' contain-ing the classification notches, and a system or variation profile 8 is in a section of the key 11 close to a spine 3~ of the key. The variation profile area 8 can extend from the spine 3' to the middle part of the key 11.
Figures 3 and 4 each show a key 12, 13 having many possible forma-tions of the variation profile. Specifically a plurality of protrusions or elevations 14 are provided along the part of the keys 12, 13 just below the spine 3'. The key 13 of Figure 4 has some of the same protrusions 14 as the key 12 of Figure 3, but not all of them. Key 13 may also be viewed as having more incisions than key 12, that is, a lack of protrusions being equated with an increase in incisions. Thus, key 12 is subordinate to key 13 in a hier-archal lock system in that key 13 will fit into all locks which can receive key 12 and then some. There are no locks which will receive key 12 but not key 13.
Key 11 is a master key over both keys 12 and 13 since all of the protrusions 14 have been removed. Thus, key 11 is a higher order key, the hierarachy and can fit into every lock which can receive key 13 or key 12 as well as others.
Common to each of the keys, however, is that they carry a basic profile 7 in the lower section, namely that of the key facing 5'. The basic profile 7, as shown in the illustrative embodiments, consists of a paracentric ~ a~635~
which crosses the center line 9 at 3 points indicated at points 15, 16 and 17. A key channel 10 in the lock which receives the basic profile 7 thus has a dentate course which largely prevents work with lock-picking tools.
An additional feature of the key which enhances the security against unauthorized opening of the lock is that the key contains at least one safety rib profile 18, that is, a profile that projects beyond the case or flat side of the key so that reworking of the key can only occur by means of applying additional material. Four safety ribs 14 are shown in the embodiments of Figures 2 through 4.
It is quite advantageous to fabricate the profile incisions and ele-vations 14 with a rectangular cross-section as is shown in the figures. This enables an economic manufacture of the keys and, as a consequence thereof, a multitude of variations can be undertaken because a very slight width of the profile incisions can be produced, for example, by means of milling disks.
Applicant has found that incisions which have a width of 0.6 millimeters can be incorporated in keys with surprising success. Thus, a large number of incisions can be made along the height of the key as is shown in the figures resulting in a large available variation in a multiple lock system.
As is apparent from the foregoing specification, the invention is sus-ceptible of being embodied with various alterations and modifications which may differ particularly from those that have been described in the preceding specification and description. It should be understood that I wish to embody within the scope of the patent warranted hereon all such modifications as reasonably and properly come within the scope of my contribution to the art.
Claims (8)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A lock-key system, particularly for hierarchal lock systems, wherein the keys are provided with an invariable basic profile and with a variation profile comprising the improvement of:
said invariable basic profile being contained in a region of a key facing carrying a plurality of classification notches and is provided with at least two profile formations which cross the centerline of the key; and said variation profile being positioned in a section adjacent to the key spine, said variation profile includes at least one safety rib profile pro-jecting beyond a lateral face of the key; and said basic profile and variation profile are comprised of profile incisions which have a rectangular cross-section.
said invariable basic profile being contained in a region of a key facing carrying a plurality of classification notches and is provided with at least two profile formations which cross the centerline of the key; and said variation profile being positioned in a section adjacent to the key spine, said variation profile includes at least one safety rib profile pro-jecting beyond a lateral face of the key; and said basic profile and variation profile are comprised of profile incisions which have a rectangular cross-section.
2. The device of claim 1 wherein said basic profile and variation pro-file are comprised of profile incisions which have a rectangular cross-section.
3. The device of claim 2 wherein said profile incisions have a narrow width.
4. The device of claim 3 wherein said profile incision widths are 0.6 millimeters.
5. The device of claim 1 wherein said variation profile includes at least one safety rib profile projecting beyond a lateral face of the key.
6. In a key for use in a hierarchal lock system with an elongated body having a spine portion and a facing portion carrying a plurality of classifica-tion notches, an improvement comprising:
an invariable basic profile formed in said facing portion and a system profile comprising longitudinal incisions formed near said spine portion where-in higher order keys in the hierarchy have more incisions than do lower order keys.
an invariable basic profile formed in said facing portion and a system profile comprising longitudinal incisions formed near said spine portion where-in higher order keys in the hierarchy have more incisions than do lower order keys.
7. The device of claim 6 wherein said incisions have a rectangular cross-section.
8. The device of claim 6 wherein said basic profile is provided with at least two profile formations which cross the centerline of the key.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19833340073 DE3340073A1 (en) | 1983-11-05 | 1983-11-05 | LOCK-KEY SYSTEM, ESPECIALLY FOR LOCKING SYSTEMS |
| DEP3340073.3-15 | 1983-11-05 | ||
| DE19843437568 DE3437568A1 (en) | 1984-10-11 | 1984-10-11 | Lock/key system |
| DEP3437568.6 | 1984-10-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1240530A true CA1240530A (en) | 1988-08-16 |
Family
ID=25815389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000466926A Expired CA1240530A (en) | 1983-11-05 | 1984-11-02 | Lock-key system |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0144734B1 (en) |
| CA (1) | CA1240530A (en) |
| DE (1) | DE3464397D1 (en) |
| DK (1) | DK524184A (en) |
| ES (1) | ES291671Y (en) |
| FI (1) | FI844328L (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4305809C1 (en) * | 1993-02-25 | 1994-03-17 | Kuenz Hans Helmut | Cylinder-lock key for master-key system - has curved portion leading to guide groove bottom and four or more straight guide faces extending in different directions |
| DE4307991C2 (en) * | 1993-03-13 | 2000-08-31 | Heinz Wolter | Locking device consisting of reversible flat key and locking cylinder |
| NO932544D0 (en) * | 1993-07-13 | 1993-07-13 | Trioving As | lock cylinder |
| DE102008043747A1 (en) | 2008-11-14 | 2010-05-20 | Aug. Winkhaus Gmbh & Co. Kg | Key for a lock cylinder |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT358951B (en) * | 1977-06-23 | 1980-10-10 | Grundmann Gmbh Geb | LOCKING SYSTEM WITH A CYLINDER LOCK BASE |
| DE2551523C3 (en) * | 1975-11-17 | 1982-03-18 | Scovill Sicherheitseinrichtungen Gmbh, 5620 Velbert | Group flat key for rotary cylinder locks in locking systems |
| AT340802B (en) * | 1976-01-28 | 1978-01-10 | Evva Werke | KEY-LOCK COMBINATION |
-
1984
- 1984-11-02 EP EP84113202A patent/EP0144734B1/en not_active Expired
- 1984-11-02 CA CA000466926A patent/CA1240530A/en not_active Expired
- 1984-11-02 DK DK524184A patent/DK524184A/en not_active Application Discontinuation
- 1984-11-02 DE DE8484113202T patent/DE3464397D1/en not_active Expired
- 1984-11-05 FI FI844328A patent/FI844328L/en not_active Application Discontinuation
- 1984-11-05 ES ES1984291671U patent/ES291671Y/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| EP0144734A1 (en) | 1985-06-19 |
| ES291671Y (en) | 1987-08-16 |
| FI844328A0 (en) | 1984-11-05 |
| DK524184A (en) | 1985-05-06 |
| ES291671U (en) | 1987-01-01 |
| DE3464397D1 (en) | 1987-07-30 |
| EP0144734B1 (en) | 1987-06-24 |
| DK524184D0 (en) | 1984-11-02 |
| FI844328L (en) | 1985-05-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |