Abstract: Systems and methods for detecting metal clips inserted within a portion of a body of a patient are disclosed herein. In one embodiment, a clip detector assembly includes a detector having a ferrous member, a transmitting coil around the ferrous member and configured to induce a current in the metal clip, and a receiving coil around the ferrous member and configured to receive a magnetic field generated by the current induced in the metal clip. The assembly can further include a control circuit having a band-pass filter configured to pass electrical signals induced by the magnetic field from the receiving coil that are within at most 35 kHz of a resonance frequency of the metal clip. The assembly still further includes a user notification component configured to alert a user to a location of the metal clip.

Abstract: Systems and methods for detecting metal clips inserted within a portion of a body of a patient are disclosed herein. In one embodiment, a clip detector assembly includes a detector having a ferrous member, a transmitting coil around the ferrous member and configured to induce a current in the metal clip, and a receiving coil around the ferrous member and configured to receive a magnetic field generated by the current induced in the metal clip. The assembly can further include a control circuit having a band-pass filter configured to pass electrical signals induced by the magnetic field from the receiving coil that are within at most 35 kHz of a resonance frequency of the metal clip. The assembly still further includes a user notification component configured to alert a user to a location of the metal clip.

Abstract: A control system synchronizes the operation of a plurality of controlled mechanisms such as slide projectors by means of unique frequency tone-binary code signals recorded on a magnetic tape. In a particular embodiment, six slide projectors and one movie projector are controlled in any desired combination or sequence and with two different fade-in, fade-out speeds and in synchronism with an audio program on another track of the tape.In this specific embodiment, four different frequency tones are used in conjunction with binary codes to provide unique slide advance and lamp control of the projectors.An encoder enables the user to make up his own programmed tapes.