Because cold cathode lamps have no thermionic emission coating to wear out they can have much longer lives than hot cathode tubes.
32.
These cold cathode type X-ray tubes were used until about 1920, when they were superseded by the hot cathode Coolidge X-ray tube.
33.
In 1964 the company produced a prototype electronic desktop calculator as a technology demonstrator for its transistors and cold cathode indicator tubes.
34.
LCDs do not directly produce light, and have to be back-lit using cold cathode fluorescent lamps ( CCFLs ) or high-power LEDs.
35.
It was a version of the Cold Cathode Ion Gauge ( CCIG ) which featured on Apollo 12, Apollo 14, and Apollo 15.
36.
Peter Wilson decided to use a cold cathode trigger tube produced by Ericsson Telephones to operate the cutter using a modified electromagnetic relay.
37.
Many types of cold-cathode switching tube were developed, including various types of thyratron, the krytron, cold cathode displays ( Nixie tube ) and others.
38.
Maintenance cycles of cold cathode gauges are, in general, measured in years, depending on the gas type and pressure that they are operated in.
39.
The principle behind cold cathode version is the same, except that electrons are produced in a discharge created by a high voltage electrical discharge.
40.
I once slept in room in Bremen an in the dark I could see a Cold cathode flicker each time a tram was passing.
