Arrangement for access accreditation has first element that transmits accreditation signal if joined to second element, permanently ceases transmission of accreditation signal when elements separated

摘要

The access accreditation arrangement has first and second elements (10,12) that are reversibly joined together. The first element transmits an accreditation signal when joined to the second element and permanently ceases transmission of the accreditation signal if the two elements are separated. The first element does not transmit the signal again if the elements are joined again after separation.