.~ Current and/or voltage (e.g., ballast resistor) {3}
21
.~.~ Voltage surge-responsive or lightning arrester type
DEFINITION
Classification: 338/21
(under subclass 20) Subject matter wherein the resistance element is formed of material whose resistance value changes sharply and often discontinuously upon a change in terminal voltage from a low to a relatively high value or upon a rise in the terminal voltage above a threshold value.
SEE OR SEARCH CLASS
361, Electricity: Electrical Systems and Devices
1+, for safety and protection systems and subclasses 117+ for high voltage dissipators such as lightning arrester systems.
