Telegraphy – Systems – Simplex-reversing periodic
Patent
1975-08-29
1976-09-14
Griffin, Robert L.
Telegraphy
Systems
Simplex-reversing periodic
178DIG11, 315364, H04N 318, H04N 544
Patent
active
039808211
ABSTRACT:
A power supply which produces a pulsating direct current potential from a first source of alternating current potential and provides a direct current potential to a means for developing a viewable display on a kinescope utilizes a filter network which includes a first inductor. The first inductor provides for a relatively constant level of direct current potential to the means for developing a viewable display with a predetermined range of direct current being supplied to the means for developing a viewable display and a relatively constant level of pulsating direct current potential. A second inductor magnetically coupled to the first inductor and the means for developing a viewable display provides a second alternating current potential greater than a predetermined level to the means for developing a viewable display. The second alternating current potential level decreases to a level below the predetermined level when the inductance of the first inductor decreases to a value less than the predetermined inductance level, thereby rendering the kinescope unviewable.
REFERENCES:
patent: 3766314 (1973-10-01), Riechmann
patent: 3796827 (1974-03-01), Riechmann
patent: 3828239 (1974-08-01), Nagai et al.
patent: 3916288 (1975-10-01), Hicks et al.
Luz David Warren
Peer John Charles
Griffin Robert L.
Rasmussen Paul J.
RCA Corporation
Saffian Mitchell
Whitacre Eugene M.
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