Electricity: electrical systems and devices – Safety and protection of systems and devices – Load shunting by fault responsive means
Patent
1985-11-15
1987-11-10
Pellinen, A. D.
Electricity: electrical systems and devices
Safety and protection of systems and devices
Load shunting by fault responsive means
315 3, 361 2, H02H 904
Patent
active
047061545
ABSTRACT:
A silicon controlled rectifier (SCR) is connected between a selected electrode of a CRT and a reference potential level that is negative relative to the selected CRT electrode. The SCR remains non-conductive so long as the voltage between the selected electrode and the reference potential level remains below the breakdown voltage of the SCR and the SCR's dv/dt rating is not exceeded. If the voltage between the electrode and the reference potential level increases at a rate that exceeds the threshold rate for the SCR, the SCR turns on and shorts the selected electrode to the reference potential level.
REFERENCES:
patent: 3934175 (1976-01-01), Clark
patent: 3965393 (1976-06-01), Chamberlain
Gaffin Jeffrey A.
Pellinen A. D.
Smith-Hill John
Tektronix Inc.
Winkelman John D.
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