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    • 18. 发明授权
    • Piezoelectric buzzer control circuit
    • 压电蜂鸣器控制电路
    • US5905326A
    • 1999-05-18
    • US905300
    • 1997-08-01
    • Klaus Schnell
    • Klaus Schnell
    • B60Q5/00G08B3/10H01L41/08
    • G08B3/10B60Q5/00
    • A control circuit for a piezoelectric buzzer, notably for automobiles, comprises a circuit for generating alternately two different frequencies and features two input supply terminals (1, 2) and two output terminals (4, 5) for buzzer activation. The control circuit includes a first flip-flop with a first and a second output, of which one carries positive and the other negative voltage. Also provided is a second flip-flop with a first input and an output, the first input connecting to the first and second outputs of the first flip-flop, each via a resistor (R4, R3). The second flip-flop consists of a parallel wiring of a first series connection of a capacitor (C2) and an inverter with Schmitt trigger input (IC1C), and a second series connection of a resistor (R5) and an inverter with Schmitt trigger input (IC1D), while a resistor is wired in parallel with the second series connection. Once a positive supply voltage is applied and grounding established, the buzzer sounds, generating alternately different frequencies f1 and f2.
    • 用于压电蜂鸣器的控制电路,特别是用于汽车的控制电路包括用于交替产生两个不同频率并且具有用于蜂鸣器激活的两个输入电源端子(1,2)和两个输出端子(4,5)的电路。 控制电路包括具有第一和第二输出的第一触发器,其中一个具有正电压和另一个负电压。 还提供了具有第一输入和输出的第二触发器,第一输入端通过电阻器(R4,R3)连接到第一触发器的第一和第二输出端。 第二触发器由电容器(C2)和具有施密特触发器输入(IC1C)的反相器的第一串联连接的并联布线,以及电阻器(R5)和具有施密特触发器输入的反相器的第二串联连接 (IC1D),而电阻器与第二串联连接并联。 一旦施加了正电源电压并建立接地,蜂鸣器发出声音,产生交替不同的频率f1和f2。
    • 19. 发明授权
    • Low molecular weight polymers of acrylic esters
    • 丙烯酸酯的低分子量聚合物
    • US4983760A
    • 1991-01-08
    • US461744
    • 1990-01-08
    • Georg BobarKlaus SchnellGerd SchroederEckehardt Wistuba
    • Georg BobarKlaus SchnellGerd SchroederEckehardt Wistuba
    • C08F2/00C08F2/04C08F2/06C08F2/38C08F20/00C08F20/12C08L33/08C09D7/12C09J11/08
    • C08F20/12
    • Low molecular weight polymers of acrylic esters which are suitable for use as external plasticizers in coated compositions on a synthetic resin basis are obtainable by subjecting(a) from 80 to 100% by weight of at least one acrylic ester of C.sub.1 -C.sub.8 -alkanol (monomer I) and(b) 0 to 20% by weight of one or more other copolymerizable monomers (monomer II)to a free radical polymerization in a solution in isopropanol in a pressure vessel at 130.degree.-140.degree. C. by introducing first from 70 to 95% by weight of a solvent and adding the remainder of the polymerization batch continuously over 3-7 hours in separate portions of which one contains the monomers and, after the polymerization has ended, distilling off the solvent under reduced pressure, the weight proportion of solvent being 5-15% by weight based on the monomers, the weight proportion of initiator being 0.5-3% by weight based on the monomers, and the half-life of the initiator at the polymerization temperature being from 10 seconds to 3 hours.
    • 通过使(a)80-100重量%的至少一种C 1 -C 8 - 链烷醇的丙烯酸酯(例如,丙烯酸酯) 单体I)和(b)0〜20重量%的一种或多种其它可共聚单体(单体II)与在130-140℃的压力容器中的异丙醇溶液中的自由基聚合反应,首先从 70至95重量%的溶剂,并在3-7小时内连续加入其余的聚合批料,其中单体含有单体,聚合结束后,在减压下蒸除溶剂,重量 基于单体,溶剂的比例为5-15重量%,引发剂的重量比例基于单体为0.5-3重量%,引发剂在聚合温度下的半衰期为10秒至 3小时。
    • 20. 发明授权
    • Device for the determination of the degree of relative rotation between two parts
    • 用于确定两部分之间的相对旋转度的装置
    • US06410909B1
    • 2002-06-25
    • US09287851
    • 1999-04-07
    • Gerd RudolphKlaus SchnellMarkus Leuschner
    • Gerd RudolphKlaus SchnellMarkus Leuschner
    • G01D534
    • G01D5/2454B62D15/02G01D5/347
    • A device for the determination of the degree of relative rotation between two parts or members with respect to each other about a main axis, the device comprising a first detector arrangement, which includes a rotation-imparting element and produces precise information indicating a relative angular position of the two members within the range of 0° and 360°, and comprising a second detector arrangement, which produces approximate information in order to be able to distinguish between full rotations. The second detector arrangement comprises a gear drive (40, 45, 75, 71) driven by the relative rotary motion of the two members and an absolute position sensor (23, 73) for the determination of the position of a measuring element (76) moved by the gear drive (40, 45, 75, 71). The dimensions of the gear drive (40, 45, 75, 71) are such that the maximum possible range of relative rotation between the two members parts corresponds to a range of motion of the measuring element (76), within which range all positions can be distinguished from each other in a geometric manner and which range can be resolved by the position sensor (23,73) at a resolution corresponding at least to the full rotations between the two members.
    • 一种用于确定两个部件或部件之间相对于主轴线相对旋转的程度的装置,该装置包括第一检测器装置,该第一检测器装置包括旋转赋予元件,并产生指示相对角位置的精确信息 的两个构件在0°和360°的范围内,并且包括第二检测器装置,其产生近似信息,以便能够区分完全旋转。 第二检测器装置包括由两个构件的相对旋转运动驱动的齿轮传动(40,45,75,71)和用于确定测量元件(76)的位置的绝对位置传感器(23,73) 由齿轮传动(40,45,75,71)移动。 齿轮传动(40,45,75,71)的尺寸使得两个部件之间的相对旋转的最大可能范围对应于测量元件(76)的运动范围,在该范围内所有位置都可以 以几何方式彼此区分,并且哪个范围可以由位置传感器(23,73)以至少对应于两个构件之间的完整旋转的分辨率来解决。