Fluorescent lamp electronic ballast with rapid voltage turn-on after
preheating
    4.
    发明授权
    Fluorescent lamp electronic ballast with rapid voltage turn-on after preheating 失效
    荧光灯电子镇流器预热后快速启动电压

    公开(公告)号:US5923126A

    公开(公告)日:1999-07-13

    申请号:US708005

    申请日:1996-08-09

    IPC分类号: H05B41/295 H05B37/02

    CPC分类号: H05B41/295

    摘要: An electronic ballast for a fluorescent lamp includes a delay triggered circuit which, upon expiration of a predetermined period during which the lamp filaments, constituting opposite electrodes of the lamp, are preheated, applies high frequency operating voltage across the opposite electrodes of the lamp beginning with a transition from a condition of no voltage to a condition of full rated voltage which occurs within one cycle of the high frequency voltage. The sharp transition from zero "glow current" to full "arc current" at the end of the preheating period has been found to increase the life of lamps in the number of on-off starts, particularly with respect to lamps of poor quality. The rapid transition is possible because the ballast uses the same inverter and transformer for supplying preheating and operating voltages. The operating voltage is applied between the opposite electrodes of the lamp via an electronic bi-directional switch, controlled by a preheating delay RC timing circuit.

    摘要翻译: 用于荧光灯的电子镇流器包括延迟触发电路,在预定时间期间,构成灯的相对电极的灯丝被预热,在从灯开始的相对电极上施加高频工作电压, 从无电压状态到在高频电压的一个周期内发生的全额定电压的条件的转变。 已经发现在预热期结束时从零“辉光电流”到完全“电弧电流”的急剧转变,以增加开关次数开始时灯的寿命,特别是对质量差的灯而言。 快速转换是可能的,因为镇流器使用相同的逆变器和变压器来提供预热和工作电压。 工作电压通过电子双向开关施加在灯的相对电极之间,由预热延迟RC定时电路控制。

    Method for preparation of amino acid thiohydantoins
    5.
    发明授权
    Method for preparation of amino acid thiohydantoins 失效
    制备氨基酸硫代乙内酰脲的方法

    公开(公告)号:US5756667A

    公开(公告)日:1998-05-26

    申请号:US307687

    申请日:1994-09-23

    摘要: The present invention consists in a method of preparing amino thiohydantoins either in isolation or as the C-terminals residue of a peptide. The method comprises reacting the amino acid or peptide with an acylating agent and thiocyanate or isothiocyanates in the presence of a strong acid. The present invention also relates to an improved method for C-terminal sequencing of peptides which routinely analyses all of the common amino acids of peptides. The invention involves the use of a strong, volatile, anhydrous organic or mineral acid to cleave the terminal amino acid thiohydantoin.

    摘要翻译: PCT No.PCT / AU93 / 00126 Sec。 371日期1994年9月23日 102(e)1994年9月23日PCT 1993年3月25日PCT公布。 第WO93 / 19082号公报 日期1993年9月30日本发明在于分离或作为肽的C-末端残基制备氨基硫代乙内酰脲的方法。 该方法包括在强酸存在下使氨基酸或肽与酰化剂和硫氰酸酯或异硫氰酸酯反应。 本发明还涉及一种常规分析肽的所有常见氨基酸的肽的C末端测序的改进方法。 本发明涉及使用强挥发性无水有机或无机酸来裂解末端氨基酸硫代乙内酰脲。