Locks – Special application – For antitheft signaling device on protected article
Patent
1994-09-22
1996-12-31
Gall, Lloyd A.
Locks
Special application
For antitheft signaling device on protected article
70 58, 70 63, 70276, 206 15, E05B 6500
Patent
active
055883150
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a safety device to be mounted on a parallelepipedic box, including e.g. CD boxes, music cassette boxes, video cassette boxes, and boxes for expensive small items such as jewelry, watches etc., but this exemplification is in no way exhausting because the safety device generally can be applied to boxes of all types.
The safety device according to the invention is of the type comprising a frame constructed to encircle the box and having an insert opening for the box, and a blocking element displaceably and pivotably mounted to the frame, said blocking element being adjustable between a blocking position and an off position to prevent in said blocking position the box inserted into the frame from being withdrawn from the frame, and a latch mechanism with a spring blade retaining the blocking element in the blocking position thereof, which spring blade can be actuated by external means in order to release the blocking element for adjustment to the off position by displacement and pivotal movement and thus allowing the box to be withdrawn from the frame through the insert opening.
The international application WO92/08026 describes a safety device of this kind wherein the blocking element, in the illustrative embodiment described therein, forms a hook and is held in the blocking position by the rotary bolt and a lock mechanism of the type disclosed in WO90/07183, when the rotary bolt is in the locking position thereof, latched in said position by the latch mechanism which can be actuated externally and comprises a spring blade which engages the rotary bolt and can be actuated by means of a magnet. In the locking position the rotary bolt engages an aperture in the blocking element and, as a consequence thereof, prevents displacement of the blocking element which clasps the box at the insert opening and in turn prevents withdrawal of the box from the frame. In the blocking position the blocking element cannot be pivoted because it is partly inserted under the lock mechanism preventing upward pivotal movement thereof.
SUMMARY OF THE INVENTION
The purpose of the invention is above all to provide a safer safety device than those proposed so far by avoiding projecting parts which tempt to mechanical breaking. Such projecting parts should be avoided and the safety device should cause a minimum increase of the outside measures of the box also for the reason that such increase may interfere with stacking of the boxes provided with the safety device, and with searching e.g. among CD boxes exposed in compartments. The purpose of the invention is, however, also to simplify the safety device structurally by reducing the number of parts in relation to present embodiments; the spring blade forming a part of the latch mechanism, engages the blocking element directly and not by the intermediary of a rotary bolt as in said lock mechanism, and the safety device can be manufactured with greater tolerances, which means that the safety device can be manufactured at lower costs. Moreover, the purpose of the invention is to simplify the function and handling of the safety device and to make it universally usable not only for rigid boxes but also for such boxes as are made of a softer material, e.g. cardboard. For example, the safety device described in WO92/08026 has been provided particularly for use with soft boxes which has resulted in a slightly more complicated safety device because the number of parts therein is relatively large. Moreover, a specific operation is necessary when handling the safety device because the rotary bolt has to be actuated after the latch mechanism having been brought to off position in order then to bring the blocking element to off position. This operation will be avoided if the latch mechanism engages directly the blocking element.
In order to achieve this purpose the safety device according to the invention has obtained the characterizing features of claim 1.
BRIEF DESCRIPTION OF THE DRAWINGS
In order to explain the invention in more detail an
REFERENCES:
patent: 2093926 (1937-09-01), Pratt
patent: 4673100 (1987-06-01), Reis et al.
patent: 4964661 (1990-10-01), Cadwell et al.
patent: 5147034 (1992-09-01), Broadhead et al.
patent: 5215189 (1993-06-01), Weisburn et al.
patent: 5289914 (1994-03-01), Holmgren
patent: 5368162 (1994-11-01), Holmgren
Gall Lloyd A.
M W Trading APS
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