US3835679A - Time control safety lock for a safe or the like with indicating means outside the safe for indicating the time control of the lock - Google Patents

Time control safety lock for a safe or the like with indicating means outside the safe for indicating the time control of the lock Download PDF

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Publication number
US3835679A
US3835679A US29878672A US3835679A US 3835679 A US3835679 A US 3835679A US 29878672 A US29878672 A US 29878672A US 3835679 A US3835679 A US 3835679A
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United States
Prior art keywords
blocking
blocking member
time
lock
indicating
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Expired - Lifetime
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English (en)
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A Heinemann
W Opferkuch
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KROMER T KG
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KROMER T KG
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    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B43/00—Time 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
    • Y10T70/7006—Predetermined time interval controlled
    • Y10T70/7028—Electric
    • 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
    • Y10T70/7006—Predetermined time interval controlled
    • Y10T70/7034—Clockwork control
    • Y10T70/704—Continuously operating once initiated
    • 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
    • Y10T70/80—Parts, attachments, accessories and adjuncts
    • Y10T70/8027—Condition indicators

Definitions

  • FIG. 4
  • This invention relates to a time-controlled safety lock containing at least one clockwork mechanism for withdrawing a blocking member or for unblocking the path of a locking or like element at a preselectable time.
  • Time-controlled safety locks for securing the doors of steel safes, bank strong rooms and the like are well known in the art.
  • time-controlled locks contain at least two or more clockwork mechanisms of which only one is actually needed for controlling a blocking mechanism, whereas the others are merely duplicates which are available in the event of failure of one of the clockwork mechanisms.
  • These timecontrolled locks are affixed to the inside of the door they secure and they cannot be seen or operated from the outside when the door is closed.
  • the present invention provides a time-controlled lock of the specified kind which in a visible position on the outside of the door secured by such a lock comprises an optical and/or acoustic indicating device associated with the clockwork mechanism or mechanisms of the time-controlled lock, or directly or indirectly driven thereby, for disclosing the presence and the blocking of the lock and for indicating at least the final part of the time remaining to the unblocking of the lock.
  • This arrangement enables a would-be burglar to see for himself that the door is secured by a time-controlled lock that cannot be interfered with from the outside until the indicated time has elapsed. This is more likely to persuade him to abandon the raid.
  • a blocking member which during the lapse of a preset blocking time is slowly withdrawable by the one or more clockwork mechanisms into an'unblocking position in which it permits a locking element, bolt or the like associated with the locking mechanism of the lock to be withdrawn, and which cooperates with setting means of a measuring potentiometer incorporated in the electrical circuit of an indicating instrument, preferably in the form of an ammeter.
  • This simple arrangement permits the passage of time to be represented by the change in current due to the change in potentiometer setting and to be indicated by the ammeter.
  • the scale of the measuring instrument may be calibrated in units of time, preferably in hours.
  • the blocking member may have an extension in the form of a rack which meshes with the setting pinion of the measuring potentiometer.
  • a shift bar cooperates with the clockwork mechanisms and is provided along part of its length or in the form of an extension with a rack for driving the setting pinion of a measuring potentiometer in the energizing circuit of an indicating instrument.
  • This part may comprise the final ten hours of the total blocking time which may be up to hours. Any one of these embodiments will therefore either indicate to a would-be burglar that more than 10 hours must still elapse before the lock is unblocked or, if this time is less than ten hours, the instrument will indicate the time that remains before the lock is unblocked.
  • the output shaft of at least one of the clockwork mechanisms may be directly or indirectly coupled for instance by means of the gearwheel under the clock dial with a measuring potentiometer or the like incorporated in the electrical circuit of an ammeter or similar indicating instrument.
  • a measuring potentiometer or the like incorporated in the electrical circuit of an ammeter or similar indicating instrument.
  • the blocking member is provided with a sliding contact or associated with a rotary multi-position contact for cooperation with a plurality of fixed contacts for consecutively closing circuits through a plurality of associated signal lamps or the like which are thus made to light up in succession for indicating the passage of time to the end of the blocking period.
  • the width of the sliding surface on the moving contact may be sufficient to enable it to complete the circuits of two neighboring signal lamps at the same time when it is in an intermediate position between two consecutive fixed contacts, two neighboring lamps glowing simultaneously indicating an intermediate time. For example, if each signal lamp lights up at the full hour, the lighting up of two neighboring lamps simultaneously would indicate the half hour.
  • the several contacts may be connected to a difference counter preferably capable of counting forwardly and rearwardly. For instance, this difference counter could be adjusted to the full hours when the blocking time is being preset, the counter then counting down the hours to zero. For counting only the last part of the blocking-times a relatively simple counter could be used showing one digit only.
  • At least one microphone may be provided adjacent the clockwork mechanism and connected to a loudspeaker outside the safe to transmit the noise of the clockwork mechanism to the outside. Any wouldbe burglar may well be impressed and convinced of the presence of a time-controlled safety lock if he can actually hear the clocks ticking.
  • the electrically operated indicating instrument In order to use the batteries for running these indicating devices as sparingly as possible it is desirable to provide the electrically operated indicating instrument with a switch so that the instrument will work only when it has been turned on by the switch. This means that the indicating instruments need not operate during the greater part of the period the lock remains blocked, and that the batteries will not be used during this part of the period. For a check at any time the switch can be operated and the instrument read.
  • the electrical circuits for an optical and/or acoustic indication of the running down of the clockwork mechanisms may be optionally connectableto the mains or to batteries in such a way that a relay brings in the battery supply when the mains supply is cut off.
  • Such an arrangement prevents failure of the lock as a result of failure of the power supply, even if normally the lock relies on the mains, and it is thus possible to make use of electrically driven clockwork mechanisms.
  • time-controlled safety locks containing withdrawable blocking members only a minor fraction of the blocking member projects, during the last part of the blocking period, into the path of the element the blocking member is intended to block. This may permit the lock to be opened by using some force before the blocking period has completely expired. It is, therefore, an incidental object of the present invention so to construct the time-controlled lock and the associated indicating means that the above-described risk is eliminated.
  • This development of the invention which is considered to possess particular merit, consists in that the withdrawal of the blocking member in opening direc tion proceeds at a uniform rate until shortly before the blocking time is due to expire and then at a higher rate to the end of the blocking period.
  • the blocking member is arranged to be withdrawn at a higher rate during the final hour of the blocking period, then the available distance for the withdrawal of the blocking member during this final hour has to be correspondingly longer. Accordingly the distance traversed even during a final half hour has to exceed the distance traversed by the blocking member in the same period if its rate of withdrawal had remained unchanged. The blocking member will therefore also project a longer distance into the blocked path than when its rate of withdrawal is uniform.
  • Such differences in the rate of withdrawal of the blocking member can be generated with the aid of a uniformly running clockwork mechanism by the interposition of suitable transmission means.
  • a suitable embodiment of such a mechanism is one in which the displacement of a shift rod effected by the clockwork mechanisms is used to deflect at least one swing arm, a further transmission arm fast on the pivot pin to which the swing arm is affixed being coupled by a slot and pin coupling to a third lever arm adapted to withdraw the blocking member, the slot being provided on one arm and the pin on the other arm, and the slot having a curvature which with due regard to the lever motions and lever ratios imparts a uniform rate of displacement to the blocking member during the major part of its withdrawal, whereas the slot contains an abrupt change in its angle of inclination adapted to impart an accelerated rate of displacement to the blocking member during the latter part of its motion, with the operation of the indicating instrument at a correspondingly higher rate.
  • the total path length of the withdrawing blocking member need not be longer than in a lock lacking the two-rate withdrawal feature.
  • the path length provided up to the beginning of the final period can be slighly reduced to make a longer path available for the final period before the unblocking of the lock, this longer path being traversed accordingly at a higher rate.
  • the scale indicating the final period may also be lengthened or the number of lamps indicating this final period may be increased, thereby providing a finer subdivision of the time scale in this region.
  • FIG. 1 is a general view of a time-controlled safety lock according to the invention
  • FIG. 2 is a section on the line IIII of FIG. 1;
  • FIG. 4 is a schematic representation showing the association of a blocking member in the time-controlled lock with a measuring potentiometer, and the method of transmitting the potentiometer signal to an indicating instrument;
  • FIG. 5 is a modified form of construction in which a sliding contact is connected to the blocking member
  • FIG. 6 is a section of the indicating instrument associated with the embodiment comprising a sliding contact and a number. of signal lamps;
  • FIG. 7 is a view of the indicating instrument in FIG. 6.
  • FIG. 8 is awiring diagram of the indicating instrument shown in FIGS. 5 to 7.
  • a time-controlled lock generally indicated by reference number 1 contains three mechanical clockwork mechanisms 3 in a casing 2, two of said clockwork mechanisms being merely provided as a precaution against the possibility of failure of one of the clockwork mechanisms.
  • these clockwork mechanisms 3 have clockwork driven dials 4 which perform a complete revolution within a specific period of time.
  • Embodiments which have proved useful have dials which revolve once in hours, and which thus permit a sequence of consecutive nonworking days to be bridged. These dials can be preset to a desired period of time, the setting operation simultaneously winding the clockwork mechanism for this period.
  • the rotating dials 4 carry pins 5 or the like which at the end of a given period of time each engage a tooth 6 on a shift bar 7.
  • the shift bar 7 transfers its movement, in a manner as will be described later, to a blocking member 8 which is thereby gradually withdrawn from an opening 9 into which a pin 10 connected to the mechanism of the main locking system must be received for unlocking the door. Since the pin 10 cannot fully enter this opening 9 until the blocking member 8 has been completely withdrawn in the direction indicated by an arrow Pf 1, the time-controlled lock remains locked and cannot be unlocked until the preset blocking time has elapsed.
  • the proposal made by the invention consists in externally clearly disclosing the presence of the timing device by indicating at least that part of the time during which the blocking member is being withdrawn.
  • the blocking member 8 carries a rack 1 1 which extends in the direction of withdrawal of the blocking member, and which meshes with a pinion 12 mounted on the setting shaft 13 of a potentiometer 14.
  • This potentiometer is included in the electrical circuit of an ammeter 15 and the current flowing in this circuit will therefore gradually vary as the setting shaft of the potentiometer 14 turns.
  • the scale 16 of the ammeter 15 may be graduated in hours to permit at least the last part of the period the lock continues to be blocked to be read.
  • the pointer 17 of the ammeter 15 may give the reading at the extreme end 16a of the scale 16 before the shift bar 7 begins to withdraw the blocking member 8, thus indicating that the lock cannot be unlocked for a period exceeding say 10 hours.
  • the final hour occupies a portion of the scale 16 which is about twice as long as that of the other hours. It will be later described how a correspondingly more rapid withdrawal of the blocking member by a longer distance in the final period is effected.
  • FIGS. 5 to 8 A different embodiment is illustrated in FIGS. 5 to 8.
  • the blocking member 8 carries a sliding contact 18 which in course of the withdrawal of the blocking member in the direction of arrow Pf 1 consecutively rides over a sequence of fixed contacts 19 and thereby consecutively closes the electrical circuits of signal lamps 20, as schematically illustrated in detail in FIG. 8.
  • the current source is presumed to be a battery 21.
  • the several signal lamps in FIGS. 7 and 8 may be arranged to indicate the last ten hours of the period the time-controlled lock remains blocked.
  • FIG. 8 shows a switch 22 in the main circuit of these signal lamps 20 which, as a rule, is kept open.
  • the circuit of the battery 21 is then ordinarily without current, energy of the battery 21 is saved and none of the signal lamps is operating.
  • the switch 22 is closed, however, it reveals the presence of a timecontrolled lock and also indicates as to when the locking time will expire.
  • a central press button 23 for actuating the switch 22, said press button closing the switch 22 when being depressed, e.g., against the force exerted by a spring, and opening said switch when being released.
  • the embodiment according to FIG. 4 may comprise, too, a switch for closing the circuit of the ammeter 15 so that also in this arrangement the batteries provided as energy sources are not used.
  • the embodiment according to FIG. 4 may comprise as an additional indicating element a signal lamp 24 which indicates that the time controlled lock is still blocked.
  • an additional signal lamp may be provided to indicate the time preceding the last 10 hours of the preset blocking period.
  • the shift bar 7 in this arrangement operates two swing arms 25 and 26.
  • An additional transmission arm 28 is fast on the pivot pin 27 to which the arm 26 is affixed.
  • the transmission arm 28 is coupled by a pin and slot coupling in a manner yet to be described to a lever arm 29 which engages the blocking member for displacing the same.
  • the slot 30 is provided on one of the arms and the cooperating pin 31 on the other. In the described embodiment the slot 30 is formed in a widened part of the transmission arm 28, whereas the cooperating pin 31 is fitted to the lever arm 29.
  • the slot thus brings about the withdrawal of the blocking member 8 in the direction of arrow Pf 1 since the free rounded end 29a of the lever arm 29 is received into a corresponding socket 32 in the blocking member 8.
  • the portion of the slot 30 along which the pin 31 initially slides has a curvature which with due regard to the lever ratios causes a substantially uniform displacement of the blocking member during the greater portion of its time of with drawal.
  • the slot 30 is abruptly off-angled at 33 and this part of the slot causes the pin 31 to be far more quickly displaced than before, although the angular speed of the transmission arm 28 is unchanged.
  • the slightly more inclined portion of the slot 30 for the reception of the pin after the latter has passed through the offangled portion at 33 merely serves for the accommodation of the overrun of the clockwork mechanisms after the end of the blocking period.
  • the slot 30 is located between the fulcrum 34 of the lever arm 29 and its point of engagement with the blocking member 8 and that from its beginning at 30a, where the pin is situated at the start of the period of withdrawal, the slot slightly reduces its radial distance from the boss 35 of the transmission arm 28 on the pivot pin 27, towards which the blocking member is withdrawable. It is also apparent that the off-angled portion at 33 in the slot offsets the slot towards the boss of the transmission arm. The desired effect is thus achieved with a minimum of mechanical means, the blocking member being withdrawn at a slow uniform rate during the major portion of its motion and then at a much more rapid rate during the final hour or some other part of the blocking period.
  • the rate of withdrawal of the blocking member during the final part of the blocking period is twice that during the preceding period of displacement.
  • an even higher rate of displacement during the final part of the blocking period is provided.
  • this additional safety feature of the time-controlled lock can also be recognized by an intruder who may thus be persuaded that an attempt on the lock shortly before the end of its blocking time would also be fruitless.
  • FIG. 1 also shows gearwheels 4a below the rotating setting dials 4 and that these gearwheels are adjustable by pinions 4b and which they are in mesh for simultaneously presetting and winding the clockworks.
  • a time controlled safety lock comprising a locking member for locking the door of a safe or the like and adapted to be withdrawn along a predetermined path for permitting opening of the door; a blocking member movable between a blocking position located in the path of said locking member to prevent withdrawal of the latter and an unblocking position completely withdrawn out of said path; at least one clockwork mechanism cooperating with said blocking member for moving the latter within a predetermined time from said blocking to said unblocking position; and indicating means cooperating with said clockwork mechanism for disclosing at a location outside the door the time controlled blocking of the lock and also the final part of the time said blocking member will remain in said blocking position, said indicating means including an electrical instrument and a measuring potentiometer in circuit with said electrical instrument and having setting means, and coupling means for coupling said setting means of said potentiometer with said blocking means for movement therewith.
  • a time controlled safety lock comprising a locking member for locking the door of a safe or the like and adapted to be withdrawn along a predetermined path for permitting opening of the door; a blocking member movable between a blocking position located in the path of said locking member to prevent withdrawal of the latter and an unblocking position completely withdrawn out of said path; at least one clockwork mechanism cooperating with said blocking member for moving the latter within a predetermined time from said blocking to said unblocking positions; transmission means between said clockwork mechanism and said blocking member for moving said blocking member during a first part of said predetermined time period at a uniform rate towards said unblocking position and then at a higher rate during the remaining part of said predetermined time period; and indicating means cooperating with said blocking member for disclosing at I a location outside the door the time controlled blocking of the lock.
  • a time controlled safety lock as defined in claim 6, wherein said transmission means comprises a shift bar operatively connected to said clockwork mechanism to be moved thereby substantially in longitudinal direction, a swing member pivotably connected at one end to said shift bar and fixed at the other end to a pivot pin, a transmission arm fixed at one end to said pivot pin, a lever arm pivoted at one end and operatively connected at the other end to said blocking member, and a pin and slot connection between said arms and comprising a slot in one of said arms and a pin fixed to the other arm and extending through said slot, said slot having a first portion of a curvature so as to impart a uniform rate of withdrawal to said locking member during a major part of said predetermined time period and a second portion abruptly deviating from the curvature of said first portion to impart an accelerated rate of withdrawal to said blocking member during the latter part of its motion, which thus operates said indicating means at a corresponding higher rate.
  • said indicating means comprises an indicating instrument having a pointer moved in correspondence with the movement of said locking member and a scale cooperating with said pointer, said scale being lengthened at the last part thereof in correspondence with the accelerated rate of withdrawal of said locking member.
  • a time controlled safety lock comprising a locking member for locking the door of a safe or the like and adapted to be withdrawn along a predetermined path of permitting opening of the door; a blocking member movable between a blocking position located in the path of said locking member to prevent withdrawal of the latter and an unblocking position completely withdrawn out of said path; at least one clockwork mechanism cooperating with said blocking member for moving the latter within a predetermined time from said blocking to said unblocking position; and indicating means cooperating with said clockwork mechanism for disclosing at a location outside the door the time controlled blocking of the lock, said indicating means including a plurality of signal lamps and including contact means cooperating with said blocking member for energizing said signal lamps in succession in dependence on the position of said blocking member.
  • a time controlled safety lock comprising a locking member for locking the door of a safe or the like and adapted to be withdrawn along a predetermined path for permitting opening of the door; a blocking member movable between a blocking position located in the path of said locking member to prevent with drawal of the latter and an unblocking position completely withdrawn out of said path; at least one clockwork mechanism cooperating with said blocking member for moving the latter within a predetermined time from said blocking to said unblocking position; and indicating means cooperating with said clockwork mechanism for disclosing at a location outside the door the time controlled blocking of the lock, said indicating means including an electrical instrument and including a switch for activating and deactivating said electrical instrument.

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US29878672 1971-10-20 1972-10-18 Time control safety lock for a safe or the like with indicating means outside the safe for indicating the time control of the lock Expired - Lifetime US3835679A (en)

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Application Number Priority Date Filing Date Title
DE19712152221 DE2152221A1 (de) 1971-10-20 1971-10-20 Zeitschloss

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US3835679A true US3835679A (en) 1974-09-17

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US29878672 Expired - Lifetime US3835679A (en) 1971-10-20 1972-10-18 Time control safety lock for a safe or the like with indicating means outside the safe for indicating the time control of the lock

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US (1) US3835679A (xx)
DE (1) DE2152221A1 (xx)
GB (1) GB1369320A (xx)
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4655061A (en) * 1984-10-01 1987-04-07 Kumahira Safe Co., Inc. Clock lock
US4875351A (en) * 1988-08-19 1989-10-24 Sargent & Greenleaf, Inc. Electronic time lock
US5979198A (en) * 1997-09-04 1999-11-09 Sphinx Elektronik Gmbh Locking mechanism with emergency opening feature useful for a safe or vault

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2538837A1 (fr) * 1982-12-29 1984-07-06 Sud Est Credit Agricole Mutuel Systeme formant serrure a combinaison a ouverture retardee
GB2135380B (en) * 1983-02-11 1987-04-01 Fox & Company Limited Thomas A time lock

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US665374A (en) * 1898-07-13 1901-01-01 Yale & Towne Mfg Co Time-lock.
US717477A (en) * 1902-02-17 1902-12-30 Arthur C Walther End-cell-switch indicator.
US925900A (en) * 1908-06-13 1909-06-22 Lawrence N Breeding Lock for toy banks.
US1164378A (en) * 1915-09-14 1915-12-14 Yale & Towne Mfg Co Time-lock.
US2561512A (en) * 1945-11-19 1951-07-24 British Tube Mills Australia P Quantity indicator for drawbenches or the like
US2772411A (en) * 1954-10-25 1956-11-27 Fishfader S Boom angle indicator for cranes
US3227863A (en) * 1961-08-03 1966-01-04 Auerbach Electronics Corp Digital position control and/or indicating system
US3509527A (en) * 1965-10-12 1970-04-28 William S Oakes Guidance systems for directing the driver of a car along a prescribed pathway
US3643420A (en) * 1969-10-14 1972-02-22 Tri Tech Clock system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US665374A (en) * 1898-07-13 1901-01-01 Yale & Towne Mfg Co Time-lock.
US717477A (en) * 1902-02-17 1902-12-30 Arthur C Walther End-cell-switch indicator.
US925900A (en) * 1908-06-13 1909-06-22 Lawrence N Breeding Lock for toy banks.
US1164378A (en) * 1915-09-14 1915-12-14 Yale & Towne Mfg Co Time-lock.
US2561512A (en) * 1945-11-19 1951-07-24 British Tube Mills Australia P Quantity indicator for drawbenches or the like
US2772411A (en) * 1954-10-25 1956-11-27 Fishfader S Boom angle indicator for cranes
US3227863A (en) * 1961-08-03 1966-01-04 Auerbach Electronics Corp Digital position control and/or indicating system
US3509527A (en) * 1965-10-12 1970-04-28 William S Oakes Guidance systems for directing the driver of a car along a prescribed pathway
US3643420A (en) * 1969-10-14 1972-02-22 Tri Tech Clock system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4655061A (en) * 1984-10-01 1987-04-07 Kumahira Safe Co., Inc. Clock lock
US4875351A (en) * 1988-08-19 1989-10-24 Sargent & Greenleaf, Inc. Electronic time lock
US5979198A (en) * 1997-09-04 1999-11-09 Sphinx Elektronik Gmbh Locking mechanism with emergency opening feature useful for a safe or vault

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Publication number Publication date
GB1369320A (en) 1974-10-02
NL7214288A (xx) 1973-04-25
DE2152221A1 (de) 1973-04-26

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