EP0064875B1 - Cylinder locks - Google Patents

Cylinder locks Download PDF

Info

Publication number
EP0064875B1
EP0064875B1 EP82302357A EP82302357A EP0064875B1 EP 0064875 B1 EP0064875 B1 EP 0064875B1 EP 82302357 A EP82302357 A EP 82302357A EP 82302357 A EP82302357 A EP 82302357A EP 0064875 B1 EP0064875 B1 EP 0064875B1
Authority
EP
European Patent Office
Prior art keywords
barrel
key
lock
tumblers
turning
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
Application number
EP82302357A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0064875A3 (en
EP0064875A2 (en
Inventor
Barrie Samuel Harper
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CE Marshall Wolverhampton Ltd
Original Assignee
CE Marshall Wolverhampton Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by CE Marshall Wolverhampton Ltd filed Critical CE Marshall Wolverhampton Ltd
Priority to AT82302357T priority Critical patent/ATE15520T1/de
Publication of EP0064875A2 publication Critical patent/EP0064875A2/en
Publication of EP0064875A3 publication Critical patent/EP0064875A3/en
Application granted granted Critical
Publication of EP0064875B1 publication Critical patent/EP0064875B1/en
Expired legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B21/00—Locks with lamelliform tumblers which are not set by the insertion of the key and in which the tumblers do not follow the movement of the bolt e.g. Chubb-locks
    • E05B21/06—Cylinder locks, e.g. protector locks
    • E05B21/063—Cylinder locks, e.g. protector locks of the sliding-plate tumbler type

Definitions

  • This invention relates to cylinder locks of the kind in which one or more tumblers carried by the single barrel of the lock act to obstruct rotation of the barrel in one unlocking, direction only until a key inserted into the lock engages with the one or more tumblers to displace them from providing such obstruction by initial turning of the key relative to the barrel in the said one direction from its position of insertion, the barrel is free from obstruction to its rotation in the opposite, locking, direction from that position without such displacement of the one or more tumblers, and a spring device is operative to retain the barrel resiliently in the key-insertion position.
  • a lock of the above-specified kind is described in French Patent Publication No. 2,067,340. More especially there is described with reference to Figures 8 to 11 of French Patent Publication No. 2,067,340 a form of such lock in which rotation of a barrel in one direction is obstructed by a bolt or bar that is held engaged between the barrel and a shoulder of the lock-casing by rotatable disc- tumblers within the barrel.
  • the tumblers maintain this obstruction until a key inserted to engage them has been rotated in the said one direction through ninety degrees relative to the barrel to align notches in the tumblers with the bar so as to enable it to be received into the barrel clear of the obstructing shoulder.
  • the barrel is however free to turn with the key in the reverse direction from the position of key insertion, the bar in this case moving with the barrel away from the shoulder obstruction into an annular clear space between the barrel and the lock casing.
  • the radial dimension of this space is limited so that while the barrel is turned in this direction away from the key-insertion position the bar is maintained projecting into the barrel to engage specially-provided recesses in the tumblers. This ensures that the return rotation of the key engaged directly with the tumblers is communicated to the barrel and precludes relative rotation between the tumblers and the barrel in their return to the key-insertion position.
  • a spring-biased ball acts between the barrel and the lock-casing to latch or index the barrel in this position once returned to it.
  • a cylinder lock of the above-specified kind characterised in that the spring device exerts a resilient bias on the barrel throughout turning of the barrel with the key in the locking direction from the position of key insertion, and that the resilient bias urges the barrel to return positively to the key-insertion position with the returning key from that direction.
  • the spring device is utilized to urge the barrel to return to the key-insertion position so as to avoid the necessity for any special provision within the tumbler mechanism itself as provided in the earlier, known lock, for retaining the barrel to turn with the tumblers while the key is being returned from the locking direction. Since the technique involved in the present invention does not require special provision within the tumbler mechanism used, it can be readily applied more generally than that involved in the earlier, known lock.
  • the spring device may simply be a coiled spring that acts on the barrel to urge it to return to the position of key-insertion for either direction of rotation.
  • the spring device may by itself provide adequate indexing of the barrel in the key-insertion position, and so by utilizing this one device it is possible to effect considerable simplification as compared with the earlier, known form of lock.
  • the cylinder lock of the present invention is of especial advantage, in particular because of the above-mentioned simplification of construction, in the provision of locks for motor vehicles. More particularly it is advantageous in the provision of pairs of motor-vehicle door-locks which are for use on opposite sides of the vehicle and which are operable by the same key to unlock respective doors, one by turning in the clockwise sense and the other by key-turning in the counter-clockwise sense so that unlocking on either side of the vehicle is always, say, by turning the key towards the front of the vehicle.
  • An earlier form of lock suitable for this purpose is described in UK Patent Specification No.
  • lockset illustrated in the accompanying drawings will be described in the context of the locking of doors of a motor vehicle. More especially the two locks of the set, identified individually as locks 1A and 1B, will be described as mounted in doors on opposite sides of the vehicle.
  • the lock 1A is mounted in the door 2 on the left-hand side (as viewed from the front) of the vehicle, and is coupled by linkage 3 to a latch 4 of the door 2. Operation of the lock 1A to effect, via the latch 4, locking and unlocking of the door 2 requires insertion of an appropriate key 5 into the lock 1A and turning of that key in one or the other of two directions, indicated as L and U, from the position of key insertion. Locking of the door 2 when closed, requires turning of the key 5 in the counter-clockwise direction L towards the rear of the vehicle, and then back to return it to the insertion position before withdrawal, whereas unlocking requires turning in the opposite, clockwise direction U towards the front of the vehicle, and then back again to the insertion position, before withdrawal.
  • the other lock 1B (not shown) of the set is mounted in a door on the opposite, right-hand, side of the vehicle, and is similarly coupled to a latch for controlling the locking and unlocking of that door.
  • Locking and unlocking of this door like that of the door 2, requires insertion of an appropriate key into the lock 1B and initial turning of the key in directions that are, respectively, towards the rear and front of the vehicle; however, because the lock 1 B is on the opposite side of the vehicle these directions of turning are of opposite hand to those applicable to the lock 1A, being clockwise for locking and counter-clockwise for unlocking.
  • the two locks 1A and 1B are both operable by the same key 5, and are of the same fundamental construction as one another but with differences to enable that same key to be used with the reversal of hand of operation as between them required.
  • the features of construction common to the locks 1A and 1B, together with those particular to the lock 1A, will now be described also with reference to Figures 2 to 8.
  • the key- operable tumbler mechanism 6 - see Figure 4- of the lock 1A is contained within a cylindrical die- cast casing 7 that has a flange 8 located at the forend of the lock.
  • the flange 8, which is for use in clamping the lock in the vehicle door 2 provides a keyhole 9 for entry of the key 5 to the mechanism 6 within the casing 7.
  • a spindle 10 of the mechanism 6 projects through a resiliently-retained bush 11 that closes the rear-end of the casing 7, and carries a lever 12 - shown in detail in Figure 7 - for coupling via the linkage 3 to the door latch 4.
  • the mechanism 6 as a whole, is restrained from turning with the casing 7. However when the appropriate key 5 is inserted and turned, the mechanism 6 is freed to turn with the key 5 through a substantial angle in either direction from the position of key insertion.
  • the spindle 10 and lever 12 turn as one with the mechanism 6, and the door latch 4 is responsive via the linkage 3 to the deflection of the lever 12 to lock or unlock the door 2 according to the sense of the deflection.
  • the keyhole 9 is continued as a slot 13 through an insert 14 that is restrained from rotation within the casing 7.
  • the insert 14 incorporates a shutter (not shown) which is spring biased to cover the slot 13 and which is deflected back clear of the slot 13 under the thrust of the key 5 as it is entered through the keyhole 9 into the tumbler mechanism 6.
  • the tumbler mechanism 6 includes a cup-shape barrel 15 which incorporates the rearwardly-projecting spindle 10 and which contains a pack of five tumblers 16 that are separated from one another by four spacing washers 17.
  • the pack of tumblers 16 is urged tightly onto the rear of the insert 14 by a plastics bush 18 acted upon by a spring 19 that abuts the closed end of the cup-shape barrel 15.
  • each tumbler 16 has two arms 20 that extend in opposite directions to one another from an apertured bellied-portion 21 into two slots 22 respectively in the cylindrical wall of the barrel 15.
  • the inside configuration of this wall is such as to enable each tumbler 16 freedom to move transversely of the barrel 15 with its arms 20 sliding in the slots 22.
  • the overall width of each tumbler 16 measured across the arms 20 equals the external diameter of the barrel 15, and according to the transverse location of the individual tumber 16 within the barrel 15, so either it is withdrawn to be contained wholly within the compass of the barrel 15, or one or the other of its two arms 20 projects.
  • the barrel 15 is biased by a coiled spring 24 mounted externally of the casing 7 to adopt a zero or key-insertion position in which the arms 20 of the extended tumblers 16 are close to abutment with the shoulders 23 to obstruct turning of the barrel 15 in the clockwise sense from this position.
  • Turning of the barrel 15 in the opposite, counter-clockwise sense from this position is not however obstructed even while the arms 20 remain extended, there being clear spaces 25 within the casing 7 between the shoulders 23 allowing some 60 degrees of freedom in this sense of turning.
  • Such turning is however opposed by the spring 24 which acts via the lever 12 keyed to the spindle 10, to bias the barrel 15 back into the key-insertion position whichever direction the barrel 15 is turned from that position.
  • the spring 24, which embraces the spindle 10 between the bush 11 and the lever 12, has its two ends 26 crossed over one another and extending either side of a lug 27 that projects forwardly from the lever 12, to bear on opposite flanks of a lug 28 of the casing 7 - see Figure 6.
  • Turning of the barrel 15 in either direction causes the lug 27 to lift one or other of the two ends 26 away from the lug 28 and wind up the spring 24 in the appropriate direction to generate the required return bias.
  • the spring 24 acts throughout the return of the key 5 from the counter-clockwise turning required to lock the door 2. As the key 5 engaged with the tumblers 16 is turned back in the clockwise sense, there is a tendency for the tumblers 16 to withdraw into the barrel 15. This tendency is overcome by the torque in the clockwise sense exerted on the barrel 15 by the spring 24 which ensures that all clockwise turning of the key 5 in its return to the key-insertion position is followed positively by the barrel 15. The barrel 15 thus returns to this position with the tumblers 16 fully extended ready for immediate withdrawal of the key 5, and with such position distinctly defined.
  • the tumblers 16 and the key 5 are constructed in accordance with the principles described in UK Patent Specification No. 1,030,921, to provide different lock combinations or differs. It will be appreciated in this respect also that the number of differs can be changed by use of more or fewer tumblers 16 within the barrel 15 of the lock 1A.
  • the lock 1B as shown at (b) is of essentially the same general construction as the lock 1A illustrated at (a), but utilizes a modified barrel 30 in which the tumblers 31 are located rearwardly as compared with the tumblers 16 carried by the barrel 15 of the lock 1A.
  • the bush 18 of the lock 1A is replaced in the lock 1B by a plastics washer 32, and a plastics bush 33 is inserted intermediate the pack of tumblers 31 and an insert 34 (corresponding to the insert 14 of the lock 1A) at the front of the lock 1B.
  • the tumblers 31 are of opposite hand to the tumblers 16, and the casing 35 in this instance has internal shoulders 36 to be engaged by these tumblers 31 in obstructing counter-clockwise turning of the barrel 30 for unlocking. Turning of the barrel 30 in the opposite sense for locking is clear by virtue of spaces 37 (corresponding to spaces 25 in the lock 1A) between the shoulders 36.
  • the single key 5 utilized for operating both locks 1A and 1B is illustrated at (c) of Figure 9.
  • Such key 5 has two sets A and B of cuts 38 displaced from one another along the circular-section key stem 39. Insertion of the key 5 in the lock 1A locates the set A of five cuts 38 within the five tumblers 16 respectively, such that clockwise turning of the key 5 withdraws the tumblers 16 from their obstruction to unlocking. On the other hand, insertion of the key 5 in the lock 1 B locates the set B of five cuts 38 within the five tumblers 31 respectively, such that counter-clockwise turning of the key 5 withdraws the tumblers 31 from their obstruction to unlocking of the lock 1B.

Landscapes

  • Lock And Its Accessories (AREA)
  • Glass Compositions (AREA)
  • Vehicle Body Suspensions (AREA)
  • Valve Device For Special Equipments (AREA)
  • Chairs Characterized By Structure (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Eye Examination Apparatus (AREA)
  • Pens And Brushes (AREA)
  • External Artificial Organs (AREA)
  • Sheet Holders (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Endoscopes (AREA)
  • Transplanting Machines (AREA)
  • Fluid-Damping Devices (AREA)
EP82302357A 1981-05-11 1982-05-10 Cylinder locks Expired EP0064875B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82302357T ATE15520T1 (de) 1981-05-11 1982-05-10 Zylinderschloss.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8114348 1981-05-11
GB8114348 1981-05-11

Publications (3)

Publication Number Publication Date
EP0064875A2 EP0064875A2 (en) 1982-11-17
EP0064875A3 EP0064875A3 (en) 1983-04-20
EP0064875B1 true EP0064875B1 (en) 1985-09-11

Family

ID=10521710

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82302357A Expired EP0064875B1 (en) 1981-05-11 1982-05-10 Cylinder locks

Country Status (9)

Country Link
EP (1) EP0064875B1 (es)
JP (1) JPS5820878A (es)
AT (1) ATE15520T1 (es)
AU (1) AU546115B2 (es)
DE (1) DE3266143D1 (es)
ES (2) ES274456Y (es)
FI (1) FI79880C (es)
GB (1) GB2098658B (es)
ZA (1) ZA823246B (es)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2136869A (en) * 1983-03-14 1984-09-26 Ford Motor Co Cylinder lock and key
DE3524584A1 (de) * 1985-07-10 1986-02-20 Thomas 6750 Kaiserslautern Presser Kfz-schliesszylinderlackschutz
JPH0650616Y2 (ja) * 1988-02-24 1994-12-21 国産金属工業株式会社 シリンダ錠
FR2664638B1 (fr) * 1990-07-11 1992-09-25 Ronis Sa Serrure a rappel automatique.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1030921A (en) * 1963-02-21 1966-05-25 Chubb & Sons Lock & Safe Co Improvements in and relating to cylinder locks
FR2067340A1 (es) * 1969-11-17 1971-08-20 Niilola Armas
GB2045854A (en) * 1979-03-16 1980-11-05 Chubb Lock & Safe Ltd Cylinder locks

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1349016A (en) * 1971-10-13 1974-03-27 Ansala Oy Cylinder lock mechanisms
ZA801399B (en) * 1979-03-16 1981-03-25 Chubb Lock & Safe Ltd Cylinder locks
GB2094877A (en) * 1981-03-14 1982-09-22 Ford Motor Co Lock and key set and key therefor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1030921A (en) * 1963-02-21 1966-05-25 Chubb & Sons Lock & Safe Co Improvements in and relating to cylinder locks
FR2067340A1 (es) * 1969-11-17 1971-08-20 Niilola Armas
GB2045854A (en) * 1979-03-16 1980-11-05 Chubb Lock & Safe Ltd Cylinder locks

Also Published As

Publication number Publication date
ES274456U (es) 1984-04-01
FI821611L (fi) 1982-11-12
ATE15520T1 (de) 1985-09-15
DE3266143D1 (en) 1985-10-17
GB2098658A (en) 1982-11-24
ES272978U (es) 1984-01-16
AU8359282A (en) 1982-11-18
JPS5820878A (ja) 1983-02-07
EP0064875A3 (en) 1983-04-20
ZA823246B (en) 1983-03-30
FI821611A0 (fi) 1982-05-07
EP0064875A2 (en) 1982-11-17
GB2098658B (en) 1985-05-09
AU546115B2 (en) 1985-08-15
ES272978Y (es) 1985-12-01
ES274456Y (es) 1984-11-16
FI79880C (fi) 1990-03-12
FI79880B (fi) 1989-11-30

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