Security apparatus
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United States of America Patent
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Jul 5, 1983
Grant Date -
N/A
app pub date -
Feb 26, 1981
filing date -
Jul 2, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Security apparatus which is operable to protect valuables by triggering an alarm and/or by defacing or rendering the valuables unusable on a change of pressure in a pressure sealable chamber. In a first embodiment suitable for use as a cash box (10), the valuables are received in a hollow receptacle (21) surrounded by a vacuum chamber (22) and a dye bomb (39) within the receptacle (21) is exploded on loss of vacuum within the vacuum chamber (22). In a second embodiment suitable for protecting the contents of mail bags, a hollow plug structure (63) is fitted to the nekc of a mail bag. The plug structure (63) has an opening (65) communicating with the interior of the mail bag so that the interior of the plug structure (63) and the interior of the mail bag can be evacuated to form a vacuum chamber. The plug structure (63) carries a dye container (69) from which dye is sprayed into the mail bag on loss of vacuum within the chamber. A third embodiment protects a painting or similar artwork by formation of a vacuum chamber (86) between the painting and a wall (83) from which it is mounted. The vacuum chamber (86) contains a battery operated alarm (93) to be triggered on loss of vacuum within the chamber (86).
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