Classifications

• • E—FIXED CONSTRUCTIONS
  • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
  • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
  • E05B65/00—Locks or fastenings for special use
  • E05B65/0075—Locks or fastenings for special use for safes, strongrooms, vaults, fire-resisting cabinets or the like
  • E05B65/0078—Safety means for persons trapped within the safe, e.g. release from inside, venting means
• • 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
  • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10S292/00—Closure fasteners
  • Y10S292/65—Emergency or safety
• • 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
  • Y10T292/00—Closure fasteners
  • Y10T292/08—Bolts
  • Y10T292/096—Sliding
  • Y10T292/1014—Operating means
  • Y10T292/1021—Motor

Definitions

• Safety mechanism for preventing the locking up of .persons in cabinets.
• an ordinary safety measure consists in leaving the latch bolts in their protruding positions after the opening of the strong-room in the morning, so that the door" cannot be closed again during the day without using a key. This increases the safety against the locking up of persons in the room between the opening and closing time, but the risk is still present precisely at these moments, because the key must then be near the room. Furthermore, one cannot expect this safety measure to be always observed.
• the invention has for its object to provide a safety mechanism which to the largest extent prevents the risk of locking up of persons, which is comparatively cheap with regard to manufacture and installation, and which can be used in a standard design in connection with strong-room doors of any type, the mechanism being either built in when the door is manufactured Or mounted later on.
• the invention relates to a safety mechanism for preventing the locking up of persons in cabinets, in particular strong-rooms of banks, by means of a latch bolt independent of the normal locking system of the cabinet and serving to prevent an unauthorized closing of the door of the cabinet, said latch bolt being carried by the cabinet door or the associated door frame and being spring-loaded from an inoperative, retracted position towards a protruding position in which, by abutment against the frame or the door, respectively, it prevents a complete closing of the door.
• a movable bottom which is maintained in a raised position by one or more springs,which, however, are not strong enough to carry the weight of a person, e.g. a child who has climbed • into the box while playing, and this movable bottom is provided at its underside with a lug which, when the bottom is pressed down, engages with a groove in the protru ing latch bolt and thereby arrests it against backward movement, so that the door cannot close co pletely.
• a ⁇ safety mechanism according to this known principl must be regarded as quite inadequate, when the problem is to prevent the locking up of persons meant -as a criminal act. e.g. in the strong-room of a bank. For instance, it will be extremely easy to block the movable bottom in its inoperative, raised position, and the latch bolt may also easily be arrested in its retracted
• the safety mechanism according to the invention differs" from the known device by the provision of an auxiliary latch bolt associated with the above-mentioned latch bolt, which auxiliary latch bolt is also spring- loaded from an inoperative, retracted position towards a protruddng position in which it .arrests the irst- mentioned bolt, or main bolt, in its protruding position and by the provision of a couple of electromagnets, one for each of the latch bolts, which electromagnets are arranged so as to . retract, when energized, the latch bolts against the action of the . springs and are incorporated in a common circuit provided with a switch which is normally closed but is automatically opened when a person enters the room, and with an additional, independently operable switch.
• the first one of these switches may suitably be built into the floor "of the cabinet and be arranged so that it is- closed when the floor is unloaded but opens when somebody steps on the floor.
• the main latch bolt will, under the action of the spring, jump forward into its blocking position as soon as it is disengaged from the edge of the frame or the door, respectively, and by this movement of the main latch bolt, the auxiliary latch bolt will be automatically released so that it is also brought into its protruding position under the action of its spring, in which position it arrests the main latch bolt and thereby prevents its retraction against the action of the spring. In this situation, it will consequently not be possible to close, even less to lock the cabinet door. As long as the cabinet floor is unloaded, it will be possible to energ-ize the two electromagnets by closing the independently operable switch which may be located anywhere, e.g.
• a • condition for energizing the two electromagnets is, however, that both the additional switch and the switch serving as person detector- or load detector in the cabinet are closed, which will only be the case when nobody is present in the cabinet. With his normal facilities and tools, a bank robber will consequently not be in a position to close the door of a cabinet in which one or more persons are present, regardless of the fact that he may be in possession of the keys for operating the normal cabinet lock.
• a special advantage is that the said circuit is de-energized when the two latch bolts are in their protruding positions, so that it will not be possible to sabotage the system by cutting one or more electric wires.
• 1 indicates a cabinet door which by means of a hinge 2 is hung on a frame 3 and which comprises ordinary latch bolts 4.
• the door comprises, furthermore, an additional bolt 5 which is the previously mentioned main latch bolt and which in its protruding position, see the left top corner of the figure, will in case of an attempt at closing the door 1 abut against the front edge 3' of the frame 3, so that a complete closing of the door will be excluded.
• the cabinet floor is indicated by 6 and is provided with a switch 7 which remains closed as long as the
• the main latch bolt 5 of the safety mechanism is slidable in a guide 8 on the door 1 and through a spindle 9 and a yoke 10 it is connected with the armature of an electromagnet 11.
• a compression spring 12 loads constantly the latch bolt 5 in the direction of its protruding position, as shown.
• a second latch bolt 14, the so-called auxiliary bolt, with spindle 15, electromagnet 16 and compression spring 19 is disposed transversely to the main bolt 5 and in such a position that the auxiliary bolt in its protruding position, as shown, engages beneath the main bolt 5 and thereby . prevents a retraction of said bolt to its inoperative position.
• the two electromagnets 11 and 16 are incorporated- in a common electric circuit 17, one conductor of which includes the automatic switch 7 placed in the cabinet, and an external, manual switch 18.

Landscapes

• Burglar Alarm Systems (AREA)
• Power-Operated Mechanisms For Wings (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=8117000

Family Applications (1)

Country Status (5)

Cited By (2)

Families Citing this family (5)

Citations (4)

Family Cites Families (7)

• 1981
  • 1981-06-30 DK DK290881A patent/DK146660B/da not_active Application Discontinuation
• 1982
  • 1982-06-29 WO PCT/DK1982/000059 patent/WO1983000180A1/en not_active Application Discontinuation
  • 1982-06-29 US US06/468,057 patent/US4501203A/en not_active Expired - Fee Related
  • 1982-06-29 DE DE8282901965T patent/DE3261843D1/de not_active Expired
  • 1982-06-29 EP EP19820901965 patent/EP0082169B1/en not_active Expired

Patent Citations (4)

Also Published As

Similar Documents

Legal Events