公开(公告)号：US3641391A

公开(公告)日：1972-02-08

申请号：US3641391D

申请日：1969-06-06

Applicant: BELTRON INC

Inventor： BADEWITZ ALBERT R

IPC: H01J7/44 ,  H01J9/50

CPC classification number: H01J7/44 ,  H01J9/505 ,  Y02W30/828

Abstract: The heater filaments of the cathode-ray guns of a color television picture tube are connected across the low-voltage secondary winding of a transformer, the primary of which is connected across the terminals of a conventional household alternating current supply through a thermistor to effect gradual increase of potential across the secondary winding. As the filament voltage increases to normal operating potential, the degree of intensity of the lamps indicates the relative electron emission of the cathodes. As the filament voltage increases above normal operating potential, the temperature of the filament and cathode are increased above normal to effect progressive removal of contaminating materials from the cathodes. The cathodes are connected to one terminal of the alternating current supply and the control grids are connected to the other terminal of the alternating current supply each through a dropping resistance, circuit breaker and indicator lamp, to produce a pulsating direct current which effects progressive drawing of fresh electron emissive material to the surface of the cathodes. This automatic progressive restoration of the cathode is evidenced by progressive brightening of the lamps and when restoration of each cathode is completed, the associated circuit breaker opens automatically to terminate the treatment.

Abstract translation: 彩色电视显像管的阴极射线枪的加热丝连接在变压器的低压二次绕组两端，其一端通过热敏电阻连接到传统家用交流电源的端子上，以实现渐变 增加次级绕组的电位。 当灯丝电压升高到正常工作电位时，灯的强度表示阴极的相对电子发射。 当灯丝电压升高到高于正常工作电位时，灯丝和阴极的温度升高到高于正常值，以便从阴极逐渐去除污染物质。 阴极连接到交流电源的一个端子，并且控制栅极通过防滴落电阻，断路器和指示灯连接到交流电源的另一个端子，以产生脉动直流，从而实现渐进拉伸 新鲜电子发射材料到阴极表面。 阴极的这种自动逐渐恢复通过灯的逐渐增亮来证明，并且当每个阴极恢复完成时，相关的断路器自动打开以终止处理。