EP0354974A1 - Zylindrische Schlösser - Google Patents

Zylindrische Schlösser Download PDF

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Publication number
EP0354974A1
EP0354974A1 EP88307564A EP88307564A EP0354974A1 EP 0354974 A1 EP0354974 A1 EP 0354974A1 EP 88307564 A EP88307564 A EP 88307564A EP 88307564 A EP88307564 A EP 88307564A EP 0354974 A1 EP0354974 A1 EP 0354974A1
Authority
EP
European Patent Office
Prior art keywords
lock
cylinder
key
rods
barrel
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.)
Withdrawn
Application number
EP88307564A
Other languages
English (en)
French (fr)
Inventor
Pieter Willem Pienaar
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0354974A1 publication Critical patent/EP0354974A1/de
Withdrawn legal-status Critical Current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
    • 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
    • E05B27/086—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 bar-tumbler type, the bars having slots or protrusions in alignment upon opening the lock

Definitions

  • This invention relates to locks, more particularly to locks of the barrel and cylinder type.
  • U.S. 4100777, P.A.G. Fredon, discloses a lock and key combination, the key having a series of axially arranged pegs co-operating with holes in the lock as well as a central blade co-operating with a similar shaped aperture in the lock.
  • U.S. 3992907 A. Pilvet, discloses a lock in which cylindrical spring-­loaded pin members are located in a rotatable barrel on axes parallel with but spaced from the central axis of rotation, a key having rods of appropriate lengths to displace the pins axially and compress the springs to bring the waists of the pins into registration with a clutch control plate.
  • U.S. 3817066 discloses a cylinder type lock having two coaxial cylinders, and a rotatable cylinder slideably mounting a plurality of tumblers.
  • the inner wall of the outer cylinder has a radial opening as a terminal for the tumblers when a key inserted into the lock contacts various pusher elements and positions all the associated tumblers at the terminal simultaneously.
  • G.B. 1503526 discloses a lock and key combination, the lock having a plurality of different length pins located in bores of the housing co-operating with a key having pins of varying length, the combined length of each key pin in the bore together with the tumbler pin being equal to the length of the through bore thereby displacing the pins in the housing and of the through bores in the drum and allowing the drum to be rotated to unlock the lock mechanism.
  • a lock in accordance with this invention comprises a barrel turnable in a cylinder, a plurality of rods with rod formations at selected positions establishing a combination, the rods slideably located in slotted holes arranged longitudinally in the barrel, the rod formations projecting through the slots of the slotted holes into the inner surface of the cylinder and movable by application of the appropriate combination to coincide with a circumferentially disposed cylinder formation in the inner surface of the cylinder and permit rotation of the barrel in the cylinder, the rods including tabs located at selected positions establishing a further combination and acted on by a suitable key of the appropriate combination.
  • the tabs project radially inwardly through slots of the slotted holes into the key hole.
  • the lock includes a key retaining plate, preferably a front plate, having a slotted hole adapted to retain the key in the lock except when the key is rotated to the insertion and withdrawal position.
  • the rods must be predisposed to adopt a position in which the rod formations do not coincide with the circumferentially disposed cylinder formation until the correct combination is applied, for example, by means of a key.
  • the rods are preferably spring loaded axially.
  • the rod formations may comprise stops which project through the slots into longitudinally disposed grooves in the inner surface of the cylinder and the circumferentially disposed cylinder formation a circumferentially disposed groove in the inner surface of the cylinder.
  • a mechanical inversion can be employed thus in place of each stop a gap in a wing where a stop would be, the wing longitudinally slideable in a longitudinal slot in a circumferentially disposed notch in the inner surface of the cylinder when the circumferentially disposed groove would be.
  • the mechanical locking and unlocking effect is the same.
  • the barrel is in an optional security enhanced embodiment provided with radially oriented tumblers of conventional kind operated on by a key having conventional formations simultaneously with the key operating on the rods with stops.
  • the number of rods may be varied as well as their disposition in the barrel thereby increasing the effective number of different combinations.
  • the rods may be round, non circular cross sectional shapes will also allow an increase in the effective number of combinations.
  • the lock comprises a barrel 1 turnable in a cylinder 2 and five rods 3 each carrying a stop 4 at selected positions establishing a combination.
  • Each rod 3 furthermore comprises tabs 5 further establishing combinations.
  • the rods 3 are slideably located in holes 41 arranged longitudinally in the barrel 1 with the stops 4 projecting through slots 6 which communicate with the holes 41 thus establishing slotted holes.
  • the rods 3 are spring loaded by springs 7 so as to normally take up the advantages of having both the stops 4 and tabs 5 in accordance with combinations unique to each lock are two-fold, firstly that the number of potential combinations is increased and secondly that the distance of the tabs 5 down the keyhole 8 of the lock is variable in the lock position, thus further increasing the difficulty of the lock picker to estimate what must be done in order to pick the lock.
  • the holes 41 are thus slotted not only outwardly by the slot 6 but also inwardly by slots 9 which permit the tabs 5 to extend from the rods 3 into the keyhole 8.
  • the cylinder 2 has longitudinally running grooves 10 in which the stops 4 run and which will hold the barrel in the cylinder in a locked irrotational state until the correct combination key is applied.
  • a circumferential groove 11 runs around the inside of the cylinder 2 and when the correct combination is applied all of the stops 4 coincide with the groove allowing the lock to be unlocked and rotated freely by the key.
  • the cylinder 2 has a front plate 12 fixed to it having a hole 13 with slot 14 to receive the key.
  • the barrel 1 has fitted to its end terminal a portion 15 which rotates with the barrel 1 when the lock is unlocked and to this portion can be attached operative components such as a tab, flange, plate or other component to be controlled by the lock.
  • the key 16 has a longitudinally running ridge 17 which is broken at 18 short of the boss 19 of the key.
  • the distal end of the key has a number of grooved formations 20 formed in it which correlate to the combination of the lock which the key is to open.
  • the length of each groove along the key shaft relates to the combination and is selected to push the tab 5 of each rod 3 just the right amount to bring the stop 4 in each case into line with the circumferential groove 11.

Landscapes

  • Lock And Its Accessories (AREA)
EP88307564A 1988-08-24 1988-08-15 Zylindrische Schlösser Withdrawn EP0354974A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA886267A ZA886267B (en) 1988-08-24 1988-08-24 Cylindrical locks

Publications (1)

Publication Number Publication Date
EP0354974A1 true EP0354974A1 (de) 1990-02-21

Family

ID=25579383

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88307564A Withdrawn EP0354974A1 (de) 1988-08-24 1988-08-15 Zylindrische Schlösser

Country Status (2)

Country Link
EP (1) EP0354974A1 (de)
ZA (1) ZA886267B (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2343107A1 (fr) * 1976-03-02 1977-09-30 Initial Serrure de surete incrochetable
DE2800374A1 (de) * 1978-01-05 1979-07-19 Perkut B R Drehzylinderschloss mit schiebestiften

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2343107A1 (fr) * 1976-03-02 1977-09-30 Initial Serrure de surete incrochetable
DE2800374A1 (de) * 1978-01-05 1979-07-19 Perkut B R Drehzylinderschloss mit schiebestiften

Also Published As

Publication number Publication date
ZA886267B (en) 1989-05-30

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19900822