Timing apptd. for use in casualty revival - provides visual or acoustic signals for cardiac massage or artificial respiration

摘要

The casualty revival apparatus incorporates acoustic and/or optical devices actuated by timing devices at adjustable frequency. The signals delivered by them allow one first-aid man or woman to carry out external cardiac massage or artificial respiration, or two to perform these operations simultaneously. The acoustic signals can be generated by an electronic oscillator circuit (2) connected to a frequency divider (3). The two signals of different frequency are fed to the timing devices, which are connected to amplifier circuits (10, 11). These supply the signals, cut off to suit the selected cycles, to loudspeakers. The apparatus can be set for infant, child, or adult.