Vintage Twin Transilluminator Both Sinuses by National Electric USA Medical Exam.
An instrument made by National Company " for Simultaneous Transillumination of BOTH sinuses" as written on the box.
Patented by Dr. Louis H. Schwartz , manufactured on or about 1945.
It has all the parts including 2 bulbs.
The wires are original and are brittle.
The instructions on how to use it are printed on the inside of the top portion of the box.
Box is in very good condition, no rips or tears.
From the Museum of Health Care:
CategoryDiagnostic & Treatment ArtifactsClassificationOtolaryngology
Physical ExaminationTransillumination -- instrumentationDescriptionA box contains a chrome and plastic-handled instrument consisting of two glass sheaths with rubbed mounted bases; electric cord for attachment to binding posts of battery box; one light carrier; the handle can be moved on the spacing bar; instructions printed on the inside of the box lid.Part Namesdevice (?) - Size: Length 19.5 cm x Width 9.0 cmglass sheaths - Size: Length 7.5 cm x Width 3.0 cm
MakerNational Electric Instrument Co. Inc.Site Made (City)Long IslandSite Made (State)New YorkSite Made (Country)United States of AmericaDates1945circa 1945Materialmetal: silverglass: clearrubber: blackcardboard: whiteInscriptionsPrinted on inside box cover: "TWIN TRANSILLUMINATION // by National // A SENSATIONAL INNOVATION"
Research FactsUsed for the simultaneous illumination of both sinuses, for sinus, antrum, mastoid, breast, and hydrocoele diagnosis; patented by Dr. Louis Schwartz; bulb hoods can be removed to tighten or change bulbs.