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    • 5. 发明授权
    • Self restoring pivoting means and print hammer using same
    • 自恢复旋转装置和使用其打印锤
    • US4557192A
    • 1985-12-10
    • US266789
    • 1981-05-26
    • William L. Dollenmayer
    • William L. Dollenmayer
    • B41J9/127B41J9/04B41J9/20
    • B41J9/20B41J9/04
    • A pivoting means for pivoting back and forth a mechanical load such as a print hammer about a given axis and within a low amplitude angle includes two elongated leaf springs. The leaf springs are located in planes at a given angle with respect to each other but both planes being perpendicular to the plane of pivotation of the mechanical load. A frame fixed relative to the pivotable mechanical load is used for attaching the extremities of both elongated leaf springs. The mechanical load is attached to both leaf springs equidistant from their attached extremities. A power source pivots the mechanical load from its rest position to its work or print position causing the two leaf springs to be flexed in torsion. The torsion flexing generates a return torque for self restoring the mechanical load back to its original position.
    • 用于围绕给定轴线并且在低振幅角度来回转动诸如打印锤的机械负载的枢转装置包括两个细长的板簧。 板簧相对于彼此以给定的角度位于平面中,但两个平面垂直于机械负载的枢转平面。 使用相对于可枢转机械负载固定的框架来连接两个细长板簧的末端。 机械载荷连接到与其连接的四肢等距的两个板簧。 电源将机械负载从其静止位置枢转到其工作或打印位置,导致两个板簧在扭转时弯曲。 扭转弯曲产生用于将机械负载恢复到其原始位置的返回扭矩。
    • 9. 发明授权
    • Print hammer with high repetition rate
    • 具有高重复率的打印锤
    • US3726213A
    • 1973-04-10
    • US3726213D
    • 1970-12-07
    • SINGER CO
    • HERBERT D
    • B41J9/127B41J9/20B41J9/38B41J9/42
    • B41J9/127B41J9/20B41J9/38B41J9/42
    • A print hammer having a repetition rate of at least a few hundred cycles per second is disclosed. The high repetition rate is achieved by employing an actuating arm which is electromagnetically driven but most is non-magnetic. The actuating arm is designed to have a small moment of inertia and so that the center of percussion strikes the electromagnet. The electromagnet is a low inductance device. The longitudinal motion of the printing hammer is at least twice the distance travelled by the center of percussion of the actuating arm. The moment of inertia of the printing hammer is kept low by making it of lightweight material and providing a central cavity therein. Impression control is provided by having an energy absorbing means included in the cavity of the hammer. The actuating arm is inhibited from rebounding from its home position because the backstop includes an anti-rebound material. A single spring means is provided to restore the hammer and the actuating arm to their at rest position. Circuit means are provided to open circuit the electromagnet before the hammer has reached the printing position.
    • 公开了具有至少几百个循环/秒的重复率的打印锤。 通过使用电磁驱动但大多数是非磁性的致动臂来实现高重复率。 致动臂被设计成具有小的惯性矩并且使得撞击中心撞击电磁体。 电磁铁是低电感器件。 打印锤的纵向运动至少是由致动臂的冲击中心行进的距离的两倍。 印刷锤的惯性矩通过使其成为轻质材料并在其中提供中心腔而保持较低。 通过具有包括在锤的腔中的能量吸收装置来提供印象控制。 由于反向挡板包括防反弹材料,致动臂被禁止从其原始位置反弹。 提供单个弹簧装置以将锤和致动臂恢复到其静止位置。 提供电路装置以在锤子到达打印位置之前对电磁体开路。