Balance control system for multichannel audio apparatus
    1.
    发明授权
    Balance control system for multichannel audio apparatus 失效
    多通道音频设备平衡控制系统

    公开(公告)号:US3956709A

    公开(公告)日:1976-05-11

    申请号:US534302

    申请日:1974-12-19

    IPC分类号: H04S1/00 H04S7/00 H03F3/68

    CPC分类号: H04S7/302

    摘要: A balance control system for multichannel audio apparatus wherein stereophonic signals are transmitted through plural audio channels of the audio apparatus. The balance control system includes a balance control network connected to the audio channels for selectively adjusting the relative amplitudes of the respective stereophonic signals transmitted therethrough with respect to each other. The balance control system further includes at least one signal delay circuit included in at least one of the audio channels for establishing relative delays among the transmitted stereophonic signals. The delay circuit is controlled simultaneously with the control of the balance control network.

    摘要翻译: 一种用于多通道音频设备的平衡控制系统,其中立体声信号通过音频设备的多个音频通道传输。 平衡控制系统包括连接到音频通道的平衡控制网络,用于选择性地调节相对于彼此传输的各个立体声信号的相对振幅。 平衡控制系统还包括至少一个信号延迟电路,其包括在至少一个音频通道中,用于建立发送的立体声信号之间的相对延迟。 延时电路与平衡控制网络的控制同步控制。

    Molten metal producing and refining method
    2.
    发明授权
    Molten metal producing and refining method 失效
    熔融金属生产和精炼方法

    公开(公告)号:US5246482A

    公开(公告)日:1993-09-21

    申请号:US765142

    申请日:1991-09-25

    CPC分类号: C21C5/34 C21C5/28

    摘要: The disclosure relates to a molten metal producing and refining method which does not damage the apparatus, realizes a stable and high second combustion rate, and is capable of effectively recovering heat generated by the second combustion. The method comprises introducing a metal-containing material, a carbonaceous material, a flux and O.sub.2 gas into a furnace. The carbon which dissolves into the metal bath in the furnace from the carbonaceous material is combusted with the O.sub.2 gas to generate heat and CO gas. The CO gas is subjected to the second combustion with the O.sub.2 gas to additionally generate heat, and the metal-containing material is melted and refined by both the generated heat and carbon. The method is characterized in that O.sub.2 gas or O.sub.2 -containing gas is blown into the furnace through large-diameter tuyeres installed near the bottom of the furnace and a part of the O.sub.2 gas does not combust in the metal bath and leaves the metal bath unburnt, to perform the second combustion of the unburnt O.sub.2 gas with CO gas in the slag bath in the furnace.

    摘要翻译: 本发明涉及不会损坏设备的熔融金属生产和精炼方法,实现稳定和高的第二燃烧速率,并且能够有效地回收由第二燃烧产生的热量。 该方法包括将含金属的材料,碳质材料,助熔剂和O 2气体引入炉中。 从碳质材料溶解在炉中的金属浴中的碳与O 2气体一起燃烧以产生热和CO气体。 CO气体与O 2气体进行第二次燃烧以额外产生热量,并且含金属的材料通过产生的热量和碳两者而熔化和精炼。 该方法的特征在于,通过安装在炉底附近的大直径风口将O2气或含O2气体吹入炉内,部分O2气体在金属浴中不燃烧,并使金属浴不燃 ,以在炉中的炉渣槽中用CO气体进行未燃烧的O 2气体的二次燃烧。