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    • 1. 发明授权
    • Conveyor construction
    • 输送机施工
    • US6109427A
    • 2000-08-29
    • US8720
    • 1998-01-19
    • Michael A. HoschScott M. HallDaniel E. ErtelKenneth A. Hansen
    • Michael A. HoschScott M. HallDaniel E. ErtelKenneth A. Hansen
    • B65G15/00B65G21/00B65G23/44B65G23/04
    • B65G23/44
    • A conveyor construction includes a frame, a drive section stationarily mounted to the frame, and a tensioning section mounted for longitudinal movement relative to the frame. The drive and tensioning sections each include a spindle, and a belt is engaged with the spindles. The frame defines an upper support surface disposed below the upper run of the belt, and mating engagement structure is provided on the belt and the upper support surface for preventing lateral movement of the belt relative to the upper support surface. The drive and tensioning sections include spaced side members, each of which defines an inwardly opening cavity for receiving a bearing assembly for rotatably supporting the spindle. The bearing-receiving cavity faces the spindle, and each side member defines outer wall structure which engages and supports the belt outwardly of the spindle. The belt overlies the outer wall structure of each side member and the adjacent belt-engaging portion of the spindle, so as to seal the inwardly facing opening and prevent ingress of moisture or other contaminants into the bearing-receiving cavity.
    • 输送机结构包括框架,固定地安装到框架的驱动部分和安装成相对于框架纵向移动的张紧部分。 驱动和张紧部分各自包括主轴,并且带与主轴接合。 框架限定了位于带的上部行程下方的上支撑表面,并且配合接合结构设置在带和上支撑表面上,用于防止带相对于上支撑表面的横向移动。 驱动和张紧部分包括间隔开的侧部构件,每个构件限定用于容纳用于可旋转地支撑心轴的轴承组件的向内开口腔。 轴承座腔面向主轴,并且每个侧部件限定外壁结构,该外壁结构将皮带向主轴外侧接合并支撑。 带子覆盖在每个侧部件的外壁结构和主轴的相邻皮带接合部分之间,以密封面向内的开口,并防止湿气或其它污染物进入轴承接收腔。
    • 3. 发明授权
    • Fully synchronized programmable counter with a near 50% duty cycle
output signal
    • 完全同步的可编程计数器,具有近50%的占空比输出信号
    • US4891825A
    • 1990-01-02
    • US154160
    • 1988-02-09
    • Kenneth A. Hansen
    • Kenneth A. Hansen
    • H03K21/08H03K23/66H03L7/183
    • H03L7/183H03K21/08H03K23/665
    • A method and arrangement for a fully synchronized, programmable frequency divider is disclosed that exhibits a near 50% duty cycle output signal independent of the divisor, whether even or odd, and that is suitable for use in a phase-locked loop (PLL) frequency synthesizer. As described in a first embodiment, the arrangement includes a data loader 31, a counter 32, a half-period detector 33, and a synchronizer 34. Next, a fast-locking, low-noise PLL frequency synthesizer is disclosed incorporating the fully synchronized, 50% duty cycle divider, and having a reference signal generator 71-72, a phase detector 73, a controlled oscillator 74-75, and the fully synchronized, programmable frequency divider 76. In a second embodiment, a fully synchronized programmable divider is described, including a data loader 31, a counter 32, a half-period detector 33', a synchronizer 34', and an additional block 82, a half-clock period detector. Synchronizer 34' is modified to include an additional block 84, an output logic circuit, which allows for an output signal duty cycle virtually equal to 50% for odd as well as even integer divisors.
    • 公开了一种完全同步的可编程分频器的方法和装置,其显示出独立于除数的近50%的占空比输出信号,无论是偶数还是奇数,并且适用于锁相环(PLL)频率 合成器。 如第一实施例所述,该装置包括数据装载器31,计数器32,半周期检测器33和同步器34.接下来,公开了一种快速锁定的低噪声PLL频率合成器,其包括完全同步的 ,50%的占空比分频器,并具有参考信号发生器71-72,相位检测器73,受控振荡器74-75和完全同步的可编程分频器76.在第二实施例中,完全同步的可编程分频器是 包括数据装载器31,计数器32,半周期检测器33',同步器34'和附加块82,半时钟周期检测器。 同步器34'被修改为包括附加块84,输出逻辑电路,其允许对于奇数以及甚至整数除数实际上等于50%的输出信号占空比。
    • 5. 发明授权
    • Conveyor construction
    • US06298981B1
    • 2001-10-09
    • US09450368
    • 1999-11-29
    • Michael A. HoschScott M. HallDaniel E. ErtelKenneth A. Hansen
    • Michael A. HoschScott M. HallDaniel E. ErtelKenneth A. Hansen
    • B65G2344
    • B65G23/44
    • A conveyor construction includes a frame, a drive section stationarily mounted to the frame, and a tensioning section mounted for longitudinal movement relative to the frame. The drive and tensioning sections each include a spindle, and a belt is engaged with the spindles. The frame defines an upper support surface disposed below the upper run of the belt, and mating engagement structure is provided on the belt and the upper support surface for preventing lateral movement of the belt relative to the upper support surface. The drive and tensioning sections include spaced side members, each of which defines an inwardly opening cavity for receiving a bearing assembly for rotatably supporting the spindle. The bearing-receiving cavity faces the spindle, and each side member defines outer wall structure which engages and supports the belt outwardly of the spindle. The belt overlies the outer wall structure of each side member and the adjacent belt-engaging portion of the spindle, so as to seal the inwardly facing opening and prevent ingress of moisture or other contaminants into the bearing-receiving cavity. A drive and locking arrangement for imparting movement to the tensioning section and for selectively locking the tensioning section in position includes a pair of pinion carriers or retainer blocks mounted one to each side of the frame, with a drive pinion being rotatably supported by the retainer blocks. Each side member includes integrally formed gear teeth engageable with opposite ends of the drive pinion, and a drive pinion actuator is engaged with one side of the frame for imparting rotation to the drive pinion to extend and retract the tensioning section. A locking arrangement is interconnected with the opposite end of the drive pinion, and functions to selectively frictionally engage the drive pinion with one of the retainer blocks to prevent rotation of the drive pinion and to thereby maintain the tensioning section in a desired position relative to the frame.
    • 10. 发明授权
    • Two-way radio having a PLL
    • 具有PLL的双向无线电
    • US4969210A
    • 1990-11-06
    • US154550
    • 1988-02-10
    • Kenneth A. HansenRalph T. Enderby
    • Kenneth A. HansenRalph T. Enderby
    • H04B1/40H03C3/09H03J5/02H03J5/24H04B1/16
    • H03C3/0966H03C3/0941H03C3/0958H03J5/0272H03J5/242H04B1/16
    • A method and arrangement for electronically bandswitching a radio (100) is described which includes at least a receiver (110, 111), a PLL (120), and a fully synchronized, programmable counter as a frequency divider (140) that is coupled between the receiver and the PLL. This fully synchronized divider (140) provides an output signal (143) at a lower frequency with minimal harmonic energy and improves the sideband noise performance as the divisor increases. When the radio also includes a transmitter (104), stepped attenuators (128, 132) are also included for adjusting the modulation of the PLL (120) when in the transmit mode.The PLL includes at least a reference signal generator (121, 122), a phase detector (124), and a voltage controlled oscillator (127) having an output (129) coupled, via a feedback path, to a second input (131) of the phase detector (124). The fully synchronized, programmable frequency divider includes at least a counter, a data loader, a half-period detector, and a synchronizer which are configured and arranged to provide an output signal (143) having a duty cycle, nearly equal to 50%, which is independent of a divisor and which simplifies the filtering requirements thereafter, thereby providing electronic bandswitching for the radio while exhibiting fast-locking and low-noise characteristics.
    • 描述了一种用于电子频带切换无线电(100)的方法和装置,其包括至少一个接收机(110,111),PLL(120)和作为分频器(140)的完全同步的可编程计数器, 接收器和PLL。 这个完全同步的分压器(140)以较低频率提供具有最小谐波能量的输出信号(143),并且随着除数增加而改善边带噪声性能。 当无线电还包括发射机(104)时,还包括步进衰减器(128,132),用于在发射模式时调节PLL(120)的调制。 PLL包括至少参考信号发生器(121,122),相位检测器(124)和压控振荡器(127),其具有经由反馈路径耦合到第二输入端(131)的输出(129) 相位检测器(124)。 完全同步的可编程分频器至少包括计数器,数据加载器,半周期检测器和同步器,其被配置和布置成提供具有几乎等于50%的占空比的输出信号(143) 其独立于除数,并且此后简化了滤波要求,从而为显示快速锁定和低噪声特性的无线电提供电子频段切换。