Safes – bank protection – or a related device – Combined – With marking devices
Patent
1985-02-28
1987-03-17
Smith, Gary L.
Safes, bank protection, or a related device
Combined
With marking devices
109 29, 109 59R, 70268, 70278, E05G 300
Patent
active
046498338
DESCRIPTION:
BRIEF SUMMARY
This invention relates to security systems for safes and more particularly to an arrangement for indelible marking of currency within the safe when unauthorized entry is attempted.
BACKGROUND ART
To deter unauthorized entry to safes time locks have been installed which prevent withdrawal of the locking bolt before expiry of a predetermined time interval. U.S. Pat. Nos. 3,702,451 (Blizard) and 2,140,698 (Goehring) are examples of such devices which ensure that the door cannot be opened except during a permissive time interval following a time delay period which begins with correct setting of the lock tumblers. In neither instance is any special provision included to guard against forcible entry. For the convenient of authorized users of the safe the time period should not be long, but curtailment of the time interval often only delays burglary and does not prevent it.
Various types of combination, or key, lock and gas or dye alarm devices have also been developed with varying degrees of success. In most instances these devices have attempted to thwart forcible entry of a safe by a burglar. A guard against forcible entry has been independently provided according to U.S. Pat. No. 3,500,771 (Fisher et al) where a dye or gas cartridge is activated by a sprung firing pin when an access door of a cabinet or vending machine is forced. An interlock between a lock switch and an alarm device has also been proposed by U.S. Pat. No. 1,743,667 (Gill). In this instance a reservoir of a marking fluid is disposed at the top of the safe which is sprayed on to the safe contents dependent upon two separate controls, viz. the position of the safe door and in response to a time mechanism. Release of the liquid occurs when the door is opened except during the time that the time mechanism operates which commences upon correct operation of a combination lock.
However, the increasing incidence of safe burglary in banks and other staff-attended establishments has led to coercion of the staff in gaining entry to the safe. In most instances for the safety of the staff, they are advised to cooperate if threatened.
It is the principal objection of this invention to provide a security system for a safe which is secure against forcible entry and includes interlocked procedures in sequential operation for permissive access.
DISCLOSURE OF INVENTION
The invention in one general form consists of a security system for a safe comprising a delayed action time lock permitting unlocking of the safe after a first time period and within a second time period, a switch operable when a door to the safe is opened, a device for dye marking of the safe's contents and being electrically actuated by said door switch, a key operated switch, and an electrical interlock circuit between the key switch, the door switch and the time lock ensuring that said marking device is not actuated if said key switch is operated before said door switch.
BRIEF DESCRIPTION OF DRAWINGS
The invention will be described in more detail with reference to the accompanying drawings, in which:
FIG. 1 is a front perspective of a safe incorporating the security system of this invention;
FIG. 2 shows in rear perspective the door of the safe shown in FIG. 1; and
FIG. 3 shows by schematic diagram the electrical interlock circuit of the security system.
BEST MODE OF CARRYING OUT THE INVENTION
A safe (4) is shown in FIG. 1 which is generally of conventional form, having a front access door (5) and a safety deposit slot (6) at its top (7). Through a face panel (8) upon the door (5) the forward end of two key switches (9) and (10) protrude from the inside of the door. Key switch (9) has a key slot (11) to accept a first security key (not shown) while switch (10) accepts a second security key (not shown) in its key slot (12). Preferably, a further security key is made available for insertion into slot (12) to enable withdrawal of the cylinder lock from switch (10) shoudld a key change be desired. LED visual indicators (13) and (14) are positioned adjacent respective switches (9) and
REFERENCES:
patent: 1743667 (1930-01-01), Gill
patent: 2140698 (1938-12-01), Goehring
patent: 3500771 (1970-03-01), Fischer et al.
patent: 3702451 (1972-11-01), Hofing
patent: 3730110 (1973-05-01), Peters
patent: 3876913 (1975-04-01), Perry
patent: 4033157 (1977-07-01), Williams
patent: 4225008 (1980-09-01), Colell et al.
P.C.T. Application 83/02975, Applicant-STENILD, Int. Pub. Date--Sep. 1, 1983.
P.C.T. Application WO,A,83/03872, Applicant CEDERGREN, Publication date--Nov. 10, 1983.
Smith Gary L.
Wilson Neill
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