US 12,119,201 B2
Cathode heater assembly and method of manufacture
Colin Andrew McElroy, Sacramento, CA (US); Michelle Gonzalez, Woodland, CA (US); Diana Gamzina Daugherty, Davis, CA (US); Mikhail Kuffel, Sacramento, CA (US); and Danny Chan, San Mateo, CA (US)
Assigned to Elve Inc., Davis, CA (US)
Filed by Elve Inc., Davis, CA (US)
Filed on Sep. 15, 2023, as Appl. No. 18/368,940.
Claims priority of provisional application 63/459,226, filed on Apr. 13, 2023.
Claims priority of provisional application 63/407,136, filed on Sep. 15, 2022.
Prior Publication US 2024/0096583 A1, Mar. 21, 2024
Int. Cl. H01J 23/04 (2006.01); H01J 9/04 (2006.01)
CPC H01J 23/04 (2013.01) [H01J 9/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A cathode heater assembly for use in a vacuum electronic device, the cathode heater assembly comprising:
a refractive cup having a bottom portion and side walls forming a container having a container height and a cup top surface;
a cathode secured in the container of the refractive cup, the cathode having a cathode height no taller than the container height and having a cathode emitting surface positioned coplanar to the cup top surface or within the container; and
a heater wire welded to the refractive cup.