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    High power acoustical transducer with elastic wave amplification
    51.
    发明授权
    High power acoustical transducer with elastic wave amplification 失效
    具有弹性波放大功能的高功率声学传感器

    公开(公告)号：US3872330A

    公开(公告)日：1975-03-18

    申请号：US40953473

    申请日：1973-10-25

    Applicant: ROCKWELL INTERNATIONAL CORP

    Inventor： MILLER DARROW L ,  WELLS WILLIAM Y

    IPC: H04R3/00 ,  B06B1/02 ,  B06B1/06 ,  H01V7/00

    CPC classification number: B06B1/0215 ,  B06B1/0611 ,  B06B2201/55

    Abstract: A high power acoustic transducer is disclosed, comprised of a number of piezoelectric elements acoustically coupled together. To maximize the available energy in each element, the piezoelectric elements are simultaneously charged by a high voltage source through a high impedance path over a relatively long period. An electrical means is provided for discharging each in succession through a low impedance path. The stored energy is thereby released by each element in a very short time to provide an acoustical pulse of high peak power. Each element is discharged with an electrical phase delay such that the elastic wave of each element adds in phase to the elastic wave of the preceding element, resulting in an amplification of the acoustic wave as it progresses down the transmission path. The entire sequence is repeated at a desired rate to produce an acoustical beam of high-peak power.

    Abstract translation: 公开了一种大功率声学换能器，其包括声耦合在一起的多个压电元件。 为了最大化每个元件中的可用能量，压电元件在相对长的时间段内通过高阻抗路径同时由高电压源充电。 提供电气装置，用于连续地通过低阻抗路径放电。 存储的能量由此在非常短的时间内由每个元件释放以提供高峰值功率的声学脉冲。 每个元件以电相位延迟放电，使得每个元件的弹性波相加于前一元件的弹性波，导致当声波向下传播路径时放大声波。 以期望的速率重复整个序列以产生高峰值功率的声束。

    Constant current circuit constituted on a monolithic ic
    52.
    发明授权
    Constant current circuit constituted on a monolithic ic 失效
    在单片IC上构成的恒定电流电路

    公开(公告)号：US3714543A

    公开(公告)日：1973-01-30

    申请号：US3714543D

    申请日：1971-11-22

    Applicant: MINOLTA CAMERA KK

    Inventor： SAHARA M ,  NANBA Y

    IPC: G05F1/56 ,  B06B1/02 ,  G05F3/22 ,  G05F3/26 ,  G05F1/06 ,  H02J1/04

    CPC classification number: G05F3/225 ,  B06B2201/55 ,  G05F3/265

    Abstract: A constant current transistor circuit employs a pair of PNP transistors disposed adjacent to each other on a single monolithic integrated circuit. Also included are a pair of NPN transistors disposed adjacent to each other on the same monolithic integrated circuit, with respective ones of the PNP transistors and the NPN transistors being connected to each other to form first and second combined transistor circuits. In each of the combined transistor circuits, the emitter of the PNP transistor is connected to the collector of the NPN transistor, while the collector of the PNP transistor is connected to the base of the NPN transistor, the respective bases of each PNP transistor also being connected directly to each other. Also provided is a third NPN transistor to provide constant current, the collector of which is connected to the emitter of the NPN transistor of one of the combined transistor circuits, while a diode is connected between the connected bases of the PNP transistors of the two combined transistor circuits and the collector of the third NPN transistor, while a DC power source is connected in series with a load and is provided across the third NPN transistor and said combined transistor circuits.

    Abstract translation: 恒流晶体管电路采用在单个单片集成电路上彼此相邻配置的一对PNP晶体管。 还包括在同一单片集成电路上彼此相邻布置的一对NPN晶体管，其中相应的PNP晶体管和NPN晶体管彼此连接以形成第一和第二组合晶体管电路。 在每个组合晶体管电路中，PNP晶体管的发射极连接到NPN晶体管的集电极，而PNP晶体管的集电极连接到NPN晶体管的基极，每个PNP晶体管的基极也是 彼此直接相连。 还提供了第三NPN晶体管，其提供恒定电流，其集电极连接到组合晶体管电路之一的NPN晶体管的发射极，而二极管连接在两个组合的PNP晶体管的连接基极之间 晶体管电路和第三NPN晶体管的集电极，而DC电源与负载串联连接，并且跨越第三NPN晶体管和所述组合晶体管电路。

    Oscillator circuit for ultrasonic apparatus
    54.
    发明授权
    Oscillator circuit for ultrasonic apparatus 失效
    用于超声波设备的振荡器电路

    公开(公告)号：US3581125A

    公开(公告)日：1971-05-25

    申请号：US3581125D

    申请日：1969-09-30

    Applicant: CLEVITE CORP

    Inventor： ARNDT JOHN P ,  FRANKLIN EDMOND G

    IPC: B06B1/02 ,  H01V7/00

    CPC classification number: B06B1/0253 ,  B06B2201/55 ,  B06B2201/71

    Abstract: An oscillator circuit is provided for ultrasonic apparatus such as ultrasonic cleaners employing a resonant transducer. The circuit includes a pair of transistors connected in series to a source of power with the transducer connected across one of the transistors in series with the primary winding of a transformer which has secondary windings connected in opposite polarity to the bases of the transistors so that one transistor is saturated while the other is nonconducting. The circuit accordingly oscillates at substantially the resonant frequency of the transducer as a result of the feedback provided by the secondary windings of the transformer.

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