Model A dental x-ray machine made by the Ritter Dental Manufacturing Company, Rochester NY USA. Wooden cabinet houses transformer and regulator while the upper arm holds the x-ray tube and metal frame which held the x-ray paper. Handheld timer dial hangs freely on one external side of the cabinet on designated a hook. Exposure times are listed on maker's plate attached to timer dial. Exposure times vary from 1-9 seconds depending on which teeth were being x-rayed and what type of x-ray paper was being used.
Dental X-Ray Equipment/ Volts 100-180 cycles 40-100/ AMPS Watts 600/ manufactured by/ Ritter Dental MFG. CO., INC./ Rochester, N.Y/ Design Pats. DEC. 20, 1921. - DEC 27, 1921/ Other Patents pending/ Patent Serial No. 3150 Maker's Plate
Ritter Dental Manufacturing Co.. 1920s. Dental X-Ray Machine [Ritter], 2010.406.2. The Museum of Transport and Technology (MOTAT).