A Unitized Illuminator-Stimulator
Francis A. Carmichael · Journal of neurosurgery · 1955
requiring a source of 0-3 volts AC which is cont inuously var iable through this range. I n addit ion it provides an AC source of sine wave character is t ics variable through a range of 0-50 volts, suitable for stiniulation of the cortex or peripheral nerves (Fig. 1). Care has been t aken in the mechanical design to insure against any possibili ty of the application of a current for a purpose for which it is not intended by installing plug-in receptacles in the container which are of different caliber, for the i l luminating and s t imulat ing cords. A glance a t the schematic diagram (Fig. ~) shows t h a t the pa t ien t is a t all t imes doubly isolated f rom the 110 v. AC supply by the isolation t ransformers , to obviate any possibility of e lectrot rauma. The i l lumination and s t imulat ion circuits are