US3209566A - Code mechanism for code locks - Google Patents

Code mechanism for code locks Download PDF

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Publication number
US3209566A
US3209566A US206358A US20635862A US3209566A US 3209566 A US3209566 A US 3209566A US 206358 A US206358 A US 206358A US 20635862 A US20635862 A US 20635862A US 3209566 A US3209566 A US 3209566A
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US
United States
Prior art keywords
slide
code
discs
lock
pawls
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 - Lifetime
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US206358A
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English (en)
Inventor
Norremark Christian Albert
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Individual
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Individual
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Publication date
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Publication of US3209566A publication Critical patent/US3209566A/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B37/00—Permutation or combination locks; Puzzle locks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T70/00—Locks
    • Y10T70/70—Operating mechanism
    • Y10T70/7153—Combination
    • Y10T70/7181—Tumbler type
    • Y10T70/7198—Single tumbler set
    • Y10T70/7237—Rotary or swinging tumblers
    • Y10T70/726—Individually set

Definitions

  • the present invention relates to code mechanisms for code locks of the art having two rotatable toothed tumbler code discs mounted in the lock case on a slide adapted as well for sideways displacements causing engagement with pawls placed in the lock case for stepwise turning the code discs as also for displacements up and down causing opening and closing of the lock.
  • the principal object of the invention is to provide a code mechanism or" the kind referred to, enabling the lock to be constructed with a much smaller number of parts than in the known locks of the same kind and nevertheless presenting the corresponding number of combinations, and which consequently can be manufactured considerably cheaper than known locks having a similar number of combinations.
  • both code discs according to the invention are moved sideways by each setting movement, and because the correct rotation of the code-discs automatically takes place, if the setting movements are executed in the correct sequence. In fact, by any deviation from the correct sequence the two code discs will be displaced relative to each other so that no release of the lock will be possible.
  • the pawls may, according to the invention, consist of leaf springs so that it is not necessary as heretofore to use separate springs.
  • the moment of friction acting against the rotation of the code discs is greater for the code-discs provided with interrupted rows of teeth than for the other code-disc thereby securing that the first named disc is not carried along by the second in case of incorrect setting.
  • a constructional simple embodiment of a code lock mechanism according to said principle may, according to the invention, be obtained in the way that the guide plate is located behind an opening in the front plate and has a bent edge extending at right angles to the maneuvering direction and through the opening of the front plate and being partly displaceable along said opening, partly forming a tilting abutment against an edge in the opening.
  • the guide plate is only disp'laceable in the maneuvering direction and has for engagement for the pin an opening with inclined edges tapering to a point.
  • FIG. 1 is an elevational view of an embodiment of a code lock, according to the invention, viewed from the front,
  • FIG. 2 is a vertical section through the lock according to the line II-II in FIG. 1,
  • FIG. 3 is an elevational view of the lock seen from behind
  • FIG. 4 is an e'levational view of a slide incorporated in the lock with tumbler code unit, seen from behind,
  • FIG. 5 is a view the same as FIG. 4 after removal of a tumbler code disc
  • FIG. 6 is a view the same as FIG. 4 after removal of a spning and a further tumbler code disc
  • FIG. 7 is a view of a spring disc arranged between the tumbler code discs in FIGS. 4 and 5,
  • FIG. 8 is an elevational view of the lock front plate with guide plate mounted thereon, viewed from the inside, and
  • FIG. 9 a corresponding view of an embodiment.
  • the lock mechanism illustrated in the drawing comprises a lock casing consisting of a front plate 1 and side walls 2 and 3 constructed in one piece with the front plate, and a rear plate 4,.
  • the front plate has an opening which is substantially shaped as a rectangle 5 having an upper narrower part 6 and a vertically extending slot 7 at the top and 8 at the bottom.
  • a guide plate 9 having a bent edge 10 which extends into the opening in the front plate and by means of a screw spring 11 mounted in the slot 8 normally is kept in abutment against the lower edge of the rectangular part 5 of said opening.
  • the guide plate may by the tension of the spring 11 be displaced as well upwards along the front plate 11,
  • the guide plate 9 has a vertical slot 12 which in the normal position flushes with the vertical slot 7 in the front plate.
  • a maneuvering slide 13 which is displaceable in the vertical direction in the lock casing.
  • the maneuvering slide 13 rests on two pressed up ribs 14 on the front plate 1 and is provided with bent side pieces 15 gliding against the inner side of the side walls 2 and 3 of the lock.
  • the maneuvering slide has a big rectangular cut-out 16.
  • the setting slide carries a through pin or shaft 18.
  • the pin 13 continues behind the setting slide 17 and carries at this place two rotatable code-discs 19 and 20.
  • the innermost of said code discs 19 rests against an annular flange 21 on the guide slide 17, while the outermost code disc 29 abuts against a shoulder 22 on the end of the inwardly extending portion of the pin 18.
  • a domed spring disc 23 (FIGS.
  • the side pieces 15 of the maneuvering slide 13 are fastened to resilient pawls 24 and 25 for cooperation with teeth 26 and 27 on the code disc 20 and teeth 28 and 29 on the code disc 19.
  • the cooperation between the pawls and the teeth will be described later below.
  • Each pawl is provided with a tongue extending down into an incision, 30 and 31 respectively in the maneuvering slide 13 for the purpose of maintaining the pawls in a definite position by the spring tension.
  • a horizontally displaceable release slide 32 On the inner side of the rear plate 4 is arranged a horizontally displaceable release slide 32 having a bent tongue 33 extending out through a horizontal slot 34 in the rear plate and standing under the influence of a spring 35 mounted on the rear side of the rear plate.
  • the release slide 32 has on its inner side a vertical cam 36 and an oblique cam 37 for cooperation with a backwardly extending nose 38 on the maneuvering slide 13.
  • a vertically displaceable blocking slide 39 On the rear side of the rear plate 4 is arranged a vertically displaceable blocking slide 39, standing under the influence of a spring 49.
  • the blocking slide 39 has a bent tongue 41 which is displaceable in a slot 42 in the rear plate.
  • On the edge facing the release slide 32 the blocking slide 39 has an incision 43 in cooperation with the tongue 33 of the release slide in a manner to be described further below.
  • the teeth on the code discs 29, 19 respectively fall into two sections designed for cooperation with individual pawls 24 and 25, when the setting slide is displaced in the direction towards the pawl in question.
  • Each of the teeth sections 26 and 27 of the tumbler disc 21 consists of an unbroken row of teeth.
  • In the teeth sections 28 and 29 of the tumbler disc 19 some gaps defining the code have no teeth.
  • the pawls 24 and 25 have such a width that they can cooperate simultaneously with both code discs.
  • the mode of operation of the lock is as follows:
  • the two tumbler discs When maneuvered in accordance with the code the two tumbler discs will keep pace with each other. If, however, a mistake is made in the maneuvering, i.e. if one of the displacements is undertaken in the wrong direction, the code disc 20 alone will be turned one tooth forward whereas the code disc 19 will remain stationary. Thus the two code discs will be displaced relative to each other, and they can no more be brought into the correct mutual position such that a notch 44 in the code disc 20 and a corresponding notch 45 in the code disc 19 are positioned opposite each other. If, for instance, a displacement is undertaken once less to the left than required, the code disc 19 will not be turned one tooth forward, when thereafter moved to the right.
  • the two notches 44 and 45 will remain in register with each other and will at least both appear at a position vertically under the pin 18.
  • opening of the lock will be brought about by pressing the pin 18 downwards.
  • the maneuvering slide 13 will as a unit move downwards.
  • the notches 44 and 45 are in their correct position for opening the lock they will glide down over the tongue 41 of the blocking slide 39, and when the bottom of the notches reaches the tongue 41, the blocking slide 39 will be carried along downwards.
  • the nose 38 of the maneuvering slide 13 will slide along the cam 36 of the release slide 32.
  • the release slide 32 will be released and try to slide to the right-hand side in FIG. 3 under the influence of the spring 35. This movement is possible if the notch 43 in the blocking slide 39 is located opposite the tongue 33 which will be the case when as mentioned above the tongue 41 has reached the bottoms in the notches 44 and 45 before the blocking slide 39 is carried along in the downward movement of the maneuvering slide 13.
  • the blocking slide 39 will be carried along downwards when the edges of the code discs hit the tongue 41.
  • the blocking slide 39 will consequently have got so far down that the notch 43 will not be located opposite the tongue 33 so that the release slide 32 cannot be displaced towards the right-hand side.
  • the displacement of the release slide 32 towards the right-hand side may be utilized in any known manner for the opening of the lock. It can for instance displace a latch, close or interrupt an electric circuit, displace a solenoid core or any other locking member.
  • the manner in which the release movement of the slide 32 is utilized for actuating such locking member does not form any part of the present invention.
  • the locking takes place by moving the pin 18 vertically upwards.
  • the nose 38 of the maneuvering slide 13 hits the oblique cam 37 of the release slide 32 and will consequently move the release slide towards left in FIG. 3.
  • the code discs 19 and 20 are moved free of the tongue 41 of the blocking slide 39 so that the blocking slide can move upwards under the influence of the spring 40.
  • the blocking slide 39 will consequently be displaced in the upward direction in such a manner that the cut-out 43 will be displaced relative to the tongue 33 whereby the release slide 32 is blocked.
  • the two tongues 46 and 47 on the code disc 20 (FIG. 4) are brought into engagement with two cams 48 on the inner side of the rear plate 4.
  • the code disc 20 is cleared.
  • the guide plate 9 serves to carry the pin 18 back to neutral position, irrespective of whether it has been displaced to the right or to the left or upwards in the slot 7.
  • the return movement takes place in the way that the guide plate is tilted back to vertical position whereby one of the side edges of the slot 12 presses on the pin 18.
  • the return movement of the pin from vertically displaced position takes place by a vertically sliding movement of the guide plate whereby the upper edge of the slot 12 will press against the pin 18.
  • slide means arranged in said case, said means comprising a first slide which is displaceable in a vertical direction and a second slide which is horizontally displaceably mounted on said first slide, pawls secured to said first slide, a shaft carried by said second slide, at least two spaced apart rotatable discs carried by said shaft, at least two pawls secured to said first slide, said one of said discs having teeth adjacently arranged in a continuous row, the other of said discs having teeth arranged in groups separated by toothfree gaps, said second slide being movable by said shaft sidewisely for engagement of said discs with said pawls respectively, whereby said discs are indepei,dently rotated according to a predetermined code, and means including said first slide for opening and closing said lock, respectively.
  • code mechanism for a code lock having a lock case
  • said means comprising a maneuvering slide which is displaceable in a vertical direction and a setting slide which is horizontally displaceably mounted on said maneuvering slide, a shaft engaging said setting slide, at least two spaced apart rotatable code discs carried by said shaft, at least two pawls secured to said maneuvering slide, said one of said discs having teeth adjacently arranged in a continuous row, the other of said discs having teeth arranged in groups separated by toothfree gaps, said setting slide being movable by said shaft sidewisely for engagement of said discs with said pawls respectively, whereby said discs are independently rotated according to a predetermined code, means including said maneuvering slide which is displaceable by said shaft, for opening and closing said lock, respectively.

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US206358A 1961-07-03 1962-06-29 Code mechanism for code locks Expired - Lifetime US3209566A (en)

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Application Number Priority Date Filing Date Title
DK273061AA DK97983C (da) 1961-07-03 1961-07-03 Kodelås.

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US3209566A true US3209566A (en) 1965-10-05

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Application Number Title Priority Date Filing Date
US206358A Expired - Lifetime US3209566A (en) 1961-07-03 1962-06-29 Code mechanism for code locks

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DK (1) DK97983C (da)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3800577A (en) * 1972-05-09 1974-04-02 C Norremark Combination lock

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3800577A (en) * 1972-05-09 1974-04-02 C Norremark Combination lock

Also Published As

Publication number Publication date
DK97983C (da) 1964-02-10

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