Electric lamp and discharge devices: systems – With cathode or cathode heater supply circuit – Automatic cut-out or voltage regulator in the cathode or...
Patent
1977-01-12
1977-11-22
Smith, Alfred E.
Electric lamp and discharge devices: systems
With cathode or cathode heater supply circuit
Automatic cut-out or voltage regulator in the cathode or...
328 9, H05B 4136, H02H 720
Patent
active
040597830
ABSTRACT:
An electron producing apparatus of the field emission type wherein instantaneous values of an emitted current are sequentially measured to store a relative minimum value of the emitted current which is obtained in such a manner that one instantaneous value which is stored is then replaced by another instantaneous value which is even smaller in magnitude than the previously stored one, and at the same time the instantaneous values are sequentially compared with the stored relative minimum value so that the electron producing apparatus is deenergized when an instantaneous value assumes a certain magnitude relative to the stored relative minimum value.
REFERENCES:
patent: 3887835 (1975-06-01), Nomura
patent: 3936756 (1976-02-01), Someya et al.
Nakaizumi Yasushi
Okumura Masahide
Ueno Yukichi
Hitachi , Ltd.
Roberts Charles F.
Smith Alfred E.
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