公开(公告)号：US3855535A

公开(公告)日：1974-12-17

申请号：US36271373

申请日：1973-05-22

Applicant: RCA CORP

Inventor： MARSH J

IPC: H03J5/02 ,  H04B1/16

CPC classification number: H03J5/0236 ,  H03J5/0218

Abstract: A motor driven television receiving tuning apparatus in which a rotor contact of a channel selector switch provides selection of one of a plurality of preset potentiometer voltages required for tuning a voltage tunable tuner. Bypassing or stopping of the rotor at a particular stator contact of the channel selector switch is determined by the voltage level at the adjustable contact of the potentiometer connected to the stator contact. If the voltage coupled to the rotor contact is in a select range the motor will be activated by a motor control coupled to a program circuit. If the voltage coupled to the rotor contact is not within the select range, the motor will stop and couple the tuning voltage to the associated tuner.

Abstract translation: 一种电动机驱动的电视接收调谐装置，其中频道选择器开关的转子接触提供对调谐电压可调谐调谐器所需的多个预置电位器电压之一的选择。 在通道选择开关的特定定子接触处绕组或停止转子由连接到定子触点的电位器的可调接点处的电压电平决定。 如果耦合到转子触点的电压处于选择范围内，则通过耦合到编程电路的电动机控制来激活电动机。 如果耦合到转子触点的电压不在选择范围内，则电机将停止并将调谐电压耦合到相关的调谐器。

公开(公告)号：US3812397A

公开(公告)日：1974-05-21

申请号：US33268573

申请日：1973-02-15

Applicant: RCA CORP

Inventor： MARSH J

IPC: H04N9/18 ,  H04N9/72 ,  H04N9/73 ,  H04N17/04 ,  H01J29/70

CPC classification number: H04N17/04 ,  H04N9/72

Abstract: Apparatus for independently controlling the cutoff of electron beam current in each of a plurality of electron guns in a color kinescope. The bias voltage that is applied to the cathode of each gun is dependent upon the peak-to-average value of separate controllable pulses supplied to each of the drive circuits of the respective cathodes. The pulse control circuits are operable to provide independent control of the kinescope bias voltage without otherwise affecting operation of the cathode drive circuits. The above apparatus is adjusted during the initial set up of the cutoff biasing potential of the cathodes of the kinescope to insure correct color balance of the guns; that is, to insure that current from each of the cathodes is cutoff at the same time during black or blanking signals and that simultaneous cut-off of all cathodes is relatively independent of fluctuations in line voltage.