| 摘要 |
The body of a pendant is of hollow construction to accommodate therein a battery, a buzzer etc. to form an electric circuit. A pair of normally closed contact elements is included, as one element, in the electric circuit; the contact elements ordinarily receiving therebetween an insulating insertion member to break the electric circuit. The insulating insertion member is designed to be detachably inserted through an opening provided in the upper end of the pendant body, the insertion member having a projection to connect the pendant body to a chain.
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