Self-contained alert device

摘要

A self-contained alert device for selective insertion between two adjacent and relatively movable separable parts of a closure. The device is passive when constrained by the closure but, when removed from the closure and therefore unconstrained, the device automatically energizes integral means for activating integral signal emitting means either locally or remotely or both locally and remotely. The device comprises in part a card-like member having at least two hinged flaps selectively foldable from an open to a closed position; integral spring means biasing the flaps apart; and integral switching means, signal emitting means, and power supply means.