Crookes tube to demonstrate heating effect
Date: 1910-1940
Inventory Number: VT5157
Classification: Discharge Tube
Subject:
Maker: American ?
Maker: German ?
Cultural Region:
Dimensions:
23.5 x 7.3 cm (9 1/4 x 2 7/8 in.)
Description:
This is a demonstration replica of a Crookes tube that showed the heating effects that cathode rays had upon impacting metal. It consists of a large bulb that stands upright from a long side tube that connects to a turned wooden stand. There is a flat disc cathode on top and a concave anode at the bottom. A thin metal plate is kept at a 45 degree angle at the center of the tube held by a glass arm that comes from the same side tube as the anode. The metal plate is partially burned through.
Signedunsigned
FunctionThis tube demonstrates how cathode ray tubes generate heat when impacting a metallic target. When the electrodes were connected to a large voltage, one would see the thin metallic sheet glow from the generated heat. This tube in particular is demonstrational and one cannot replace the sheet, and was probably discarded once it was burned through.