EP0139796A1 - Improved tubular lock - Google Patents
Improved tubular lock Download PDFInfo
- Publication number
- EP0139796A1 EP0139796A1 EP83306515A EP83306515A EP0139796A1 EP 0139796 A1 EP0139796 A1 EP 0139796A1 EP 83306515 A EP83306515 A EP 83306515A EP 83306515 A EP83306515 A EP 83306515A EP 0139796 A1 EP0139796 A1 EP 0139796A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pin
- tumblers
- plug
- pick
- lower pin
- 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.)
- Granted
Links
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B27/00—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in
- E05B27/02—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in operated by the edge of the key
- E05B27/08—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in operated by the edge of the key arranged axially
- E05B27/083—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in operated by the edge of the key arranged axially of the split-pin tumbler type
Definitions
- a correct key J is inserted into the known lock to lower the upper pin-tumblers C which in turn press down the lower pin-tumblers H to the correct height so as to enable the upper plug A to turn, thus allowing the upper plug A to revolve and release the bolt B.
- Fig. 14, Fig. 15 and Fig. 16 and 17 illustrate the use of the pick tools; first, insert each pin R of the pick as shown in Fig. 17 into each upper pin hole D to lower the upper pin-tumblers C, which in turn push the lower pin-tumblers H to the bottom of the lower pin holes D. Then, turn the pick tool clockwise and counterclockwise alternately, thereby slightly rotating the upper plug A clockwise and counterclockwise al ternately.
- the reason why the upper plug A can slightly be rotated clockwise and counter clockwise is that the diameter of the upper pin-tumbler C must be smaller than that of the upper pin hole D.
- the lower pin-tumblers H Since the lower pin-tumblers H are spring loaded, they will go upwards until their tops are in contact with the bottom surface of the upper plug A while the upper plug A is slightly rotated clockwise and counterclockwise, i.e. the lower pin-tumblers H are lifted to the correct height. Thus the upper plug A is allowed to revolve and .the bolt B is released.
- Fig. 18 illustrates the use of the pick tool shown in Fig. 9 to pick the known lock.
- the pick tool shown in Fig. 9 slightly insert the pick tool shown in Fig. 9 into the upper plug A, and at the same time turn it clockwise and counterclockwise alternately.
- the upper plug A is rotated clockwise and counterclociwise alternately.
- the lower pin-tumblers H will go downward until their tops are in contact with the bottom surface of the upper plug A while the upper plug A is being slightly rotated clockwise and counterclockwise, i.e. the lower pin-tumblers H are lowered to the correct height.
- the upper plug A is allowed to revolve and the bolt B is released.
- the known tubular lock is easy to pick and should be improved.
- the present invention relates to a tubular lock, and more particularly to one comprising a number of lower pin-tumblers having flanges in association with the same number of lower pin holes provided with recesses, making the lock very difficult to pick and offering a high degree of security under ordinary circumstances.
- the object of the present invention is to provide an improved tubular lock which is difficult to pick and to offer a high degree of security under ordinary circumstances.
- FIG. 1 and Fig. 2 there is shown the present invention comprising a housing 200 in which a plurality of upper pin-tumblers 3.
- a bolt 20, an upper plug 2, a plurality of lower pin-tumblers 1, a plurality of springs 6, and a lower plug 4 are mounted.
- Each upper pin-tumbler 3 has length different from the others, and the same is true to the lower pin-tumblers.
- the upper pin-tumblers 3 are inserted into upper pin holes 21 of the upper plug 2.
- the upper plug 2 is fixed to the bolt 20.
- Each lower pin-tumbler 1 is provided with two flanges 11.
- the lower pin-tumblers 1 together with the springs 6 are inserted into lower pin holes 41 of the lower plug 4.
- the number of the upper pin-tumblers 3 is equal to the number of the lower pin-tumblers 1 and is also equal to the number of the springs 6.
- the bolt 20 extends through the upper plug 2, the lower plug 4, a blocking plate 50 and a locking plate 60, and is screwed into a nut 70.
- Each lower pin-tumbler 1 is aligned with each upper pin-tumbler 3 and extends from the lower plug 4 into each upper pin hole 21.
- the combination of the upper plug 2, the bolt 2, and the lower plug 4 are installed into the housing 200 and fixed by means of inserting a pin 80 into the lower plug 4.
- the pin-tumbler are spring-loaded so that they are always in the locking position except when the proper key is inserted.
- each recess 411 is shown at the upper part of each pin hole 41 of the lower plug 4.
- the depth of each recess 411 is different from the others.
- a proper key 5 being inserted into the lock according to the preferred embodiment of the present invention to lower the upper pin-tumblers 3 which in turn press down the lower pin-tumblers 1 to the correct height so as to allow the upper plug 2 to revolve and release the bolt 20.
- Fig. 6 there is shown the height of the flange 11 being A, then the depth of the recess 411 is A + 0.1A, and the length of the upper end 12 is 2A; let the depth of the lower pin hole 41 be B, then the diameter of the recess 411 is 1.2B.
- Fig. 7 shows why it is impossible to use the pick tool shown in Fig. 17 to pick the lock according to the present invention.
- Each pin R of the piew tool shown in Fig. 17 is inserted into each upper pin hole 21 to lower the upper pin-tumblers 3 which in turn push the lower pin-tumblers 41 to the bottom of the lower pin holes 41. Then , turn the pick tool clockwise and counterclockwise alternately, thereby slightly rotating the upper plug 2 clockwise and counterclockwise alternately.
- the reason why the upper plug 2 can slightly be rotated clockwise and counterclockwise is that the diameter of the upper pin-tumbler 3 must be smaller than that of the upper pin hole 21.
- the lower pin-tumblers 4 Since the lower pin-tumblers 4 are spring-loaded, they will go upwards until the flanges 11 are in contact with the bottom surface 22 of the upper plug 2 while the upper plug 2 is being slightly rotated clockwise and counterclockwise. As a result, the upper ends 12 of the lower pin-tumblers 1 will go into the pin holes 21 of the upper plug 2. In other words, the rotation of the upper plug 2 is prevented by the lower pin-tumblers 1, i.e. it is impossible to pick -the lock according to the present invention.
- Fig. 8 shows why it is impossible to use another pick tool shown in Fig. 9 to pick the lock according to the present invention.
- the pick tool shown in Fig. 9 is first slightly inserted into the upper plug 2, and at the same time is turned clockwise and counterclockwise alternately.
- the upper plug 2 is slightly rotated clockwise and counter clockwise alternately.
- the lower pin-tumblers 1 will go downward until the flange 11 of the lower pin-tumbler is in contact with the recess 411.
- the rotation of the upper plug 2 is prevented by the upper ends 12 of the lower pin-tumblers 1, i.e. it is impossible to pick the lock according to the present invention.
- each flange 11 may be different one another and the same is true to the recesses.
Landscapes
- Lock And Its Accessories (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
- Buckles (AREA)
Abstract
Description
- Most tubular locks in the market are easy to pick because of :
- The known tubular lock as shown in Fig. 10 and Fig. 11 comprise s a
housing 1 in which a plurali ty of upper pin-tumblers C, a bolt B, an upper plug D, a plurality of springs G, and a lower plug E are mounted. Each upper pin-tumbler C has a length different from the others; the same is tru to the lower pin-tumblers H. The upper pin-tumblers C are inserted into upper pin holes D of the upper plug A which is fixed to the bolt a. The lower pin-tumblers H together with the springs G are inserted into lower pin holes F of the lower plug E. The number of the upper pin-tumblers C is equal to the number of the lower pin-tumblers H and is also equal to the number of the springs G. The bolt B extends through the upper plug A, the lower plug E, a blocking plate K and is screwed into a nut T. Each lower pin-tumbler H is aligned with each upper pin-tumbler C and extends from the lower plug E into each upper pin hole D. The combination of the upper plug A, the bolt B and the lower plug E are installed into thehousing 1 and fixed by means of a pin (Y) inserted into the lower plug E. The pin-tumblers are spring-loaded so that they are always in the locking position except when the proper key is inserted. - As shown in Fig. 12, a correct key J is inserted into the known lock to lower the upper pin-tumblers C which in turn press down the lower pin-tumblers H to the correct height so as to enable the upper plug A to turn, thus allowing the upper plug A to revolve and release the bolt B.
- Fig. 14, Fig. 15 and Fig. 16 and 17 illustrate the use of the pick tools; first, insert each pin R of the pick as shown in Fig. 17 into each upper pin hole D to lower the upper pin-tumblers C, which in turn push the lower pin-tumblers H to the bottom of the lower pin holes D. Then, turn the pick tool clockwise and counterclockwise alternately, thereby slightly rotating the upper plug A clockwise and counterclockwise al ternately. The reason why the upper plug A can slightly be rotated clockwise and counter clockwise is that the diameter of the upper pin-tumbler C must be smaller than that of the upper pin hole D. Since the lower pin-tumblers H are spring loaded, they will go upwards until their tops are in contact with the bottom surface of the upper plug A while the upper plug A is slightly rotated clockwise and counterclockwise, i.e. the lower pin-tumblers H are lifted to the correct height. Thus the upper plug A is allowed to revolve and .the bolt B is released.
- Fig. 18, illustrates the use of the pick tool shown in Fig. 9 to pick the known lock. First, slightly insert the pick tool shown in Fig. 9 into the upper plug A, and at the same time turn it clockwise and counterclockwise alternately. Thus the upper plug A is rotated clockwise and counterclociwise alternately. In consequence, the lower pin-tumblers H will go downward until their tops are in contact with the bottom surface of the upper plug A while the upper plug A is being slightly rotated clockwise and counterclockwise, i.e. the lower pin-tumblers H are lowered to the correct height. Thus the upper plug A is allowed to revolve and the bolt B is released.
- As stated, the known tubular lock is easy to pick and should be improved.
- The present invention relates to a tubular lock, and more particularly to one comprising a number of lower pin-tumblers having flanges in association with the same number of lower pin holes provided with recesses, making the lock very difficult to pick and offering a high degree of security under ordinary circumstances.
- The object of the present invention is to provide an improved tubular lock which is difficult to pick and to offer a high degree of security under ordinary circumstances.
- The other objects of the present invention may be gained by following the detailed description and the drawings attached.
- Fig. 1 is a perspective and exploded view of a preferred embodiment of the present invention.
- Fig. 2 is a sectional view of the preferred embodiment of the present invention.
- Fig. 3 is an enlarged perspective and fragmentary view; of the lower plug shown in Fig. 1.
- Fig. 4 is a sectional view of the present invention showing proper key being inserted into the tubular lock according to the preferred embodiment of the present invention.
- Fig. 5 is an end-view of Fig. 4.
- Fig. 6 shows the sizes of the lower pin-tumbler and the lower pin hole.
- Fig. 7 is a sectional view showing why it is impossible to use the pick tool shown in Fig. 17 to pick the lock constructed according to the present invention.
- Fig. 8 is a sectional view showing the failure of of another picking method.
- Fig. 9 is a perspective view of a pick tool.
- Fig. 10 is a perspective and exploded view of a known tubular lock.
- Fig. 11 is a sectional view of the known tubular lock shown in Fig. 10.
- Fig. 12 is a sectional view showing that the correct key has been inserted into the known tubular lock.
- Fig. 13 is an end view of Fig. 12.
- Fig. 14 shows how to pick a known lock.
- Fig. 14, Fig. 15 and Fig. 16 show how to use the pick tool shown in Fig. 17 to pick a known lock.
- Fig. 17 is a perspective and exploded view of another pick tool;
- Fig. 18 shows how to use the pick tool shown in Fig. 9 to pick a known lock.
- Referring to Fig. 1 and Fig. 2, there is shown the present invention comprising a
housing 200 in which a plurality of upper pin-tumblers 3. Abolt 20, anupper plug 2, a plurality of lower pin-tumblers 1, a plurality ofsprings 6, and alower plug 4 are mounted. Each upper pin-tumbler 3 has length different from the others, and the same is true to the lower pin-tumblers. The upper pin-tumblers 3 are inserted intoupper pin holes 21 of theupper plug 2. Theupper plug 2 is fixed to thebolt 20. Each lower pin-tumbler 1 is provided with twoflanges 11. The lower pin-tumblers 1 together with thesprings 6 are inserted intolower pin holes 41 of thelower plug 4. The number of the upper pin-tumblers 3 is equal to the number of the lower pin-tumblers 1 and is also equal to the number of thesprings 6. Thebolt 20 extends through theupper plug 2, thelower plug 4, ablocking plate 50 and alocking plate 60, and is screwed into anut 70. Each lower pin-tumbler 1 is aligned with each upper pin-tumbler 3 and extends from thelower plug 4 into eachupper pin hole 21. The combination of theupper plug 2, thebolt 2, and thelower plug 4 are installed into thehousing 200 and fixed by means of inserting apin 80 into thelower plug 4. The pin-tumbler are spring-loaded so that they are always in the locking position except when the proper key is inserted. - Referring to Fig. 3, there is shown a
recess 411 at the upper part of eachpin hole 41 of thelower plug 4. The depth of eachrecess 411 is different from the others. - Referring to Fig. 4, there is shown a
proper key 5 being inserted into the lock according to the preferred embodiment of the present invention to lower the upper pin-tumblers 3 which in turn press down the lower pin-tumblers 1 to the correct height so as to allow theupper plug 2 to revolve and release thebolt 20. - Referring to Fig. 6, there is shown the height of the
flange 11 being A, then the depth of therecess 411 is A + 0.1A, and the length of theupper end 12 is 2A; let the depth of thelower pin hole 41 be B, then the diameter of therecess 411 is 1.2B. - Fig. 7 shows why it is impossible to use the pick tool shown in Fig. 17 to pick the lock according to the present invention. Each pin R of the piew tool shown in Fig. 17 is inserted into each
upper pin hole 21 to lower the upper pin-tumblers 3 which in turn push the lower pin-tumblers 41 to the bottom of thelower pin holes 41. Then , turn the pick tool clockwise and counterclockwise alternately, thereby slightly rotating theupper plug 2 clockwise and counterclockwise alternately. The reason why theupper plug 2 can slightly be rotated clockwise and counterclockwise is that the diameter of the upper pin-tumbler 3 must be smaller than that of theupper pin hole 21. Since the lower pin-tumblers 4 are spring-loaded, they will go upwards until theflanges 11 are in contact with thebottom surface 22 of theupper plug 2 while theupper plug 2 is being slightly rotated clockwise and counterclockwise. As a result, theupper ends 12 of the lower pin-tumblers 1 will go into thepin holes 21 of theupper plug 2. In other words, the rotation of theupper plug 2 is prevented by the lower pin-tumblers 1, i.e. it is impossible to pick -the lock according to the present invention. - Fig. 8 shows why it is impossible to use another pick tool shown in Fig. 9 to pick the lock according to the present invention. The pick tool shown in Fig. 9 is first slightly inserted into the
upper plug 2, and at the same time is turned clockwise and counterclockwise alternately. Thus theupper plug 2 is slightly rotated clockwise and counter clockwise alternately. In consequence, the lower pin-tumblers 1 will go downward until theflange 11 of the lower pin-tumbler is in contact with therecess 411. In ther words, the rotation of theupper plug 2 is prevented by theupper ends 12 of the lower pin-tumblers 1, i.e. it is impossible to pick the lock according to the present invention. Nevertheless, once theflange 11 at the upper part of the lower pin-tumbler 1 goes into thelower pin hole 41. The upper pin-tumblers 1 will go into therecess 411 too, so that the rotation of theupper plug 2 is prevented by the upper pin-tumblers 1. - Consequently, it is impossible to pick the lock according to the present invention no matter what kind of picking method is used.
- In order to increase the safety of the present invention, the height of each
flange 11 may be different one another and the same is true to the recesses. - The invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiment is therefore considered in all respects as illustrative and not restrictive, the scope of the invention is indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalent of the claims are therefore deemed to be embraced therein.
Claims (1)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8383306515T DE3375418D1 (en) | 1983-10-26 | 1983-10-26 | Improved tubular lock |
EP19830306515 EP0139796B1 (en) | 1983-10-26 | 1983-10-26 | Improved tubular lock |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP19830306515 EP0139796B1 (en) | 1983-10-26 | 1983-10-26 | Improved tubular lock |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0139796A1 true EP0139796A1 (en) | 1985-05-08 |
EP0139796B1 EP0139796B1 (en) | 1988-01-20 |
Family
ID=8191327
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19830306515 Expired EP0139796B1 (en) | 1983-10-26 | 1983-10-26 | Improved tubular lock |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0139796B1 (en) |
DE (1) | DE3375418D1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4683739A (en) * | 1986-07-21 | 1987-08-04 | Hughes Donald R | Key operated lock |
EP0325634A1 (en) * | 1987-07-07 | 1989-08-02 | Fort Lock Corporation | High security pin tumbler lock |
EP0556505A2 (en) * | 1991-12-20 | 1993-08-25 | Lu, Den-Yi | Axial pin tumbler lock |
EP0964120A1 (en) * | 1998-06-08 | 1999-12-15 | SERRATURE MERONI S.p.A. | A tubular lock |
GB2375371A (en) * | 2001-05-10 | 2002-11-13 | Trojan Hardware & Designs Ltd | Key and lock arrangement |
GB2512274A (en) * | 2013-02-08 | 2014-10-01 | William Frederick Crosbie | Rotational pin lock |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1876907U (en) * | 1963-06-06 | 1963-08-01 | Karrenberg Fa Wilhelm | LOCK CYLINDER. |
GB940428A (en) * | 1958-12-19 | 1963-10-30 | Lowe & Fletcher Ltd | Improvements relating to locks |
-
1983
- 1983-10-26 EP EP19830306515 patent/EP0139796B1/en not_active Expired
- 1983-10-26 DE DE8383306515T patent/DE3375418D1/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB940428A (en) * | 1958-12-19 | 1963-10-30 | Lowe & Fletcher Ltd | Improvements relating to locks |
DE1876907U (en) * | 1963-06-06 | 1963-08-01 | Karrenberg Fa Wilhelm | LOCK CYLINDER. |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4683739A (en) * | 1986-07-21 | 1987-08-04 | Hughes Donald R | Key operated lock |
EP0325634A1 (en) * | 1987-07-07 | 1989-08-02 | Fort Lock Corporation | High security pin tumbler lock |
EP0325634A4 (en) * | 1987-07-07 | 1990-10-24 | Fort Lock Corporation | High security pin tumbler lock |
EP0556505A2 (en) * | 1991-12-20 | 1993-08-25 | Lu, Den-Yi | Axial pin tumbler lock |
EP0556505A3 (en) * | 1991-12-20 | 1993-11-03 | Chang Jie Ind Co Ltd | Axial pin tumbler lock |
EP0964120A1 (en) * | 1998-06-08 | 1999-12-15 | SERRATURE MERONI S.p.A. | A tubular lock |
GB2375371A (en) * | 2001-05-10 | 2002-11-13 | Trojan Hardware & Designs Ltd | Key and lock arrangement |
GB2375371B (en) * | 2001-05-10 | 2004-06-16 | Trojan Hardware & Designs Ltd | Window handle arrangement |
GB2512274A (en) * | 2013-02-08 | 2014-10-01 | William Frederick Crosbie | Rotational pin lock |
Also Published As
Publication number | Publication date |
---|---|
EP0139796B1 (en) | 1988-01-20 |
DE3375418D1 (en) | 1988-02-25 |
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