cathode ray tube, Crookes style
Date: 1920-1940
Inventory Number: 1997-1-1305
Classification: Discharge Tube
Dimensions:20.4 x 22.3 x 9.7 cm (8 1/16 x 8 3/4 x 3 13/16 in.)
Description:
This cathode ray tube consists of an exhausted cylindrical glass tube with the negative electrode at one end and the positive electrode on one side. A target in the form of a Maltese cross hinged at the bottom is located so as to cast a shadow on the end of the tube opposite the negative electrode. Rays may be deflected by an electromagnet. The whole glass structure is set into a turned wooden base.