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    • 4. 发明授权
    • High DC voltage power supply for motor vehicle electrical system
    • 用于汽车电气系统的高直流电压电源
    • US4780619A
    • 1988-10-25
    • US050999
    • 1987-05-15
    • Robert W. CampbellDonald O. RuffDavid W. Caldwell
    • Robert W. CampbellDonald O. RuffDavid W. Caldwell
    • H02J7/14H02P9/26
    • H02J7/1438Y10T307/718
    • A high DC voltage power supply includes a three-phase autotransformer and a three-phase full-wave rectifier applied to the usual motor vehicle electrical system of the low DC voltage type. The low three-phase AC voltage of the usual system is transformed by the autotransformer to obtain a high three-phase AC voltage which is then rectified by the rectifier to provide a high DC voltage. The load energized by the high DC voltage is ungrounded to reduce the voltage available for inadvertent discharge from either load terminal to ground. Switching apparatus is provided for selectively applying the low three-phase AC voltage to the autotransformer only when it is desired to energize the load thereby avoiding at all other times the energy losses that would otherwise be associated with energization of the autotransformer. In one embodiment, the load is a windshield heater element and the autotransformer has multiple sets of input taps to provide deice and defog modes of operation, respectively. The tapping of the autotransformer on the input or primary side yields efficiencies in the construction and operation of the autotransformer. The engine driven generator of the vehicle electrical system is excited from a voltage source independent of the low three-phase AC voltage put out by the generator, at least during any period that the generator is overloaded, thereby to prevent a degenerative collapse in the generator output voltage.
    • 高直流电压电源包括三相自耦变压器和三相全波整流器,其应用于低直流电压型的通常机动车辆电气系统。 通常系统的低三相交流电压由自耦变压器变换,以获得高三相交流电压,然后由整流器进行整流,以提供高直流电压。 由高直流电压供电的负载不接地,以降低可用于从负载端子到接地的无意放电的电压。 提供开关装置,用于仅当需要对负载通电时选择性地将低三相AC电压施加到自耦变压器,从而在所有其他时间避免否则将与自耦变压器的通电相关联的能量损失。 在一个实施例中,负载是挡风玻璃加热器元件,并且自耦变压器分别具有多组输入抽头以提供操作模式和除雾模式。 自耦变压器在输入或初级端的开关在自耦变压器的结构和运行方面产生效率。 至少在发电机过载的任何时间段内,车载电气系统的发动机驱动发电机从电压源被激励,独立于由发电机输出的低三相交流电压,从而防止发电机的退化崩溃 输出电压。
    • 6. 发明授权
    • Aromatic sulfide/sulfone polymer production
    • 芳香族硫化物/砜聚合物生产
    • US4301274A
    • 1981-11-17
    • US116434
    • 1980-01-29
    • Robert W. Campbell
    • Robert W. Campbell
    • C08G75/02C08G75/16C08G75/20
    • C08G75/0236
    • Aromatic sulfide/sulfone polymers are prepared by initially contacting a dihaloaromatic sulfone, an alkali metal sulfide, an organic amide, and, optionally, an alkali metal carboxylate under polymerization conditions and subsequently at or near completion of the polymerization reaction, adding an end-capping agent comprising additional dihaloaromatic sulfone to the reaction mixture producing a polymer exhibiting improved physical properties including melt flow stability. The resulting polymers have utility as coatings, films, molded objects, filaments, fibers, and the like.
    • 芳族硫化物/砜聚合物通过在聚合反应条件下,随后在聚合反应或接近完成时首先使二卤代芳砜,碱金属硫化物,有机酰胺和任选的碱金属羧酸盐接触来制备,加入封端 其包含额外的二卤代芳砜到反应混合物中,产生显示出改善的物理性质(包括熔体流动稳定性)的聚合物。 所得到的聚合物具有作为涂料,薄膜,成型体,长丝,纤维等的用途。
    • 9. 发明授权
    • Copolyamide
    • 共聚酰胺
    • US4051087A
    • 1977-09-27
    • US687973
    • 1976-05-20
    • Lacey E. ScogginsRobert W. Campbell
    • Lacey E. ScogginsRobert W. Campbell
    • C08G69/26
    • C08G69/265Y10T428/31739
    • Normally solid, moldable polyamides having diamine-derived structural units of the formula ##STR1## wherein each A is individually selected from the group consisting of 5-methylnonamethylene, 2,4-dimethyloctamethylene, 2,4,6-trimethylheptamethylene, and 4-isopropylheptamethylene; first diacid-derived structural units of the formula ##STR2## and second diacid-derived structural units of the formula ##STR3## wherein X is a divalent aliphatic hydrocarbon radical containing from 14 to 46 carbon atoms. Minor amounts of other polyamide-forming materials can be included in the copolyamide to provide up to 30 percent of the nitrogen atoms and up to 30 percent of the carbonyl groups. When used as adhesives, these copolyamides possess very good initial T-peel strength.
    • 通常为具有式“IMAGE”的具有二胺衍生的结构单元的固体可成型聚酰胺,其中每个A各自选自5-甲基亚麻基,2,4-二甲基八亚甲基,2,4,6-三甲基亚庚基和4-异丙基亚庚基 ; 具有式“IMAGE”的第一二酸衍生的结构单元和式IMAMA的第二二酸衍生的结构单元,其中X是含有14至46个碳原子的二价脂族烃基。 可以在共聚酰胺中包含少量的其它聚酰胺形成材料,以提供高达30%的氮原子和至多30%的羰基。 当用作粘合剂时,这些共聚酰胺具有非常好的初始T剥离强度。