Abstract: An X-ray film holder particularly adapted for use in dental work comprises a first clip which may be secured to a conventional saliva ejector and tongue guard. The film holder includes a generally rectangular spine from which a second, film-holding clip projects on one side, and from which the first clip projects on the other side. In use, the normal placement of the saliva ejector and tongue guard properly positions a piece of X-ray film within the mouth.

Abstract: A medical alert alarm is provided to enable an individual having a medical problem in the nature of a heart condition to alert bystanders of an impending attack. The alarm includes a compartment for storing medication, as well as means to identify the individual and the nature of the medical problem. An important feature of the invention relates to the small size of a housing used to contain components of the alarm. Very small components, including a small speaker and other audio oscillator circuitry, are used. In order to project an audible signal having desirable alerting characteristics, and still maintain a small housing size, a resonant cavity is employed. The dimensions of the resonant cavity are carefully selected so that the proper audible signal is produced. The invention also includes a clip and a switch positioned such that the alarm can be activated easily.