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    • 8. 发明授权
    • Digital voter for multiple site PST R trunking system
    • 多站点PST R中继系统的数字投票者
    • US5131007A
    • 1992-07-14
    • US363980
    • 1989-06-09
    • Thomas A. BrownCharles L. DerengeMarcella M. TuckerVicki J. TeelHouston H. Hughes, III
    • Thomas A. BrownCharles L. DerengeMarcella M. TuckerVicki J. TeelHouston H. Hughes, III
    • H04B7/24H04M11/00H04W4/10H04W84/08
    • H04W84/08H04W4/10H04W76/005
    • A digital voter system for a multi-site public service trunking (PST) digitally trunked RF communications system operates on the principle that it is highly likely that messages received during a system redundancy removal period are redundant messages. For a given RF channel, digital receiver is associated with each of multiple sites and receives digital messages reported to it by its associated sites. The multiple digital receivers are connected to a digital selector via a service request line (FSL) and a serial data line (BSL). Digital receivers which have messages to transfer to the digital selector attempt to seize the service request line and, if they successfully seize it, maintain the line in its seized state for the redundancy removal period. Digital receivers which have messages but discover the service request line is already seized simply discard their messages. Since it is likely that two digital receivers may successfully seize the service request line at or near the same time, a windowing technique is used to schedule the times different digital receivers may apply their messages to the serial data line. If a digital receiver sees signals on the serial data line before it is scheduled to begin transmitting, it discards its message and aborts its transmission attempt. The preferred embodiment voter thus handles messages very rapidly (to reduce system latency time) while effectively removing most redundant messages and reducing or eliminating data collision on the shared serial data bus.
    • 用于多站点公共服务中继(PST)数字集群RF通信系统的数字投票系统的操作原理是,在系统冗余删除期间接收的消息很可能是冗余消息。 对于给定的RF信道,数字接收机与多个站点中的每一个相关联并且接收由其相关站点向其报告的数字消息。 多个数字接收器通过服务请求线(FSL)和串行数据线(BSL)连接到数字选择器。 具有传送到数字选择器的消息的数字接收机尝试占用服务请求线路,并且如果它们成功占用,则将该线路保持在占用状态以用于冗余消除周期。 具有消息但发现服务请求行的数字接收器已经被占用,简单地丢弃其消息。 由于两个数字接收机很可能在同一时间或接近同一时间成功地占用服务请求线,所以使用开窗技术调度不同的数字接收机将其消息应用于串行数据线的时间。 如果数字接收机在计划开始发送之前看到串行数据线上的信号,则丢弃其消息并中止其发送尝试。 因此,优选实施例的选择器非常快速地处理消息(以减少系统等待时间),同时有效地去除大多数冗余消息并减少或消除共享串行数据总线上的数据冲突。
    • 9. 发明授权
    • Lighting unit having power supply with improved switching means
    • 照明单元具有改进的开关装置的电源
    • US4471268A
    • 1984-09-11
    • US452904
    • 1982-12-27
    • Thomas A. BrownMarc A. DissoswayJames E. HarrisWilliam Peil
    • Thomas A. BrownMarc A. DissoswayJames E. HarrisWilliam Peil
    • H05B41/18H05B41/36H05B35/00
    • H05B41/36
    • An energy efficient lighting unit is described designed for functional similarity to the incandescent light used in the home. The lighting unit utilizes a metal vapor arc lamp as the main source of light supplemented by a standby filamentary light source. The lighting unit includes means for converting 60 hertz ac to dc, and a dc energized operating network containing a three transistor switch. The transistor switch is used to provide dc and low frequency (120 Hz) energization to the filament, and high frequency energization for both filament and arc lamp. The high frequency energization, which starts and transitions the arc lamp, is discontinued after the arc lamp is started. In the final run state, the arc lamp, which is serially connected with the filament across the dc supply, is ballasted by the filament. The transistor switch is controlled in its operation by an integrated circuit.
    • 描述了一种设计用于与家用白炽灯功能相似的节能照明单元。 照明单元利用金属蒸气弧灯作为补充有备用丝状光源的主要光源。 照明单元包括用于将60赫兹交流转换为直流的装置,以及包含三晶体管开关的直流通电工作网络。 晶体管开关用于为灯丝提供直流和低频(120 Hz)通电,以及灯丝和弧光灯的高频通电。 弧光灯启动后停止启动和转换弧光灯的高频通电。 在最终的运行状态下,通过直流电源与灯丝串联连接的电弧灯被灯丝镇压。 晶体管开关由集成电路控制在其工作状态。
    • 10. 发明授权
    • Lighting unit
    • 照明单元
    • US4392081A
    • 1983-07-05
    • US288855
    • 1981-07-31
    • Thomas A. BrownWilliam Peil
    • Thomas A. BrownWilliam Peil
    • H01J61/56H01J61/96H05B35/00H05B41/24H02K17/34H02P1/54
    • H01J61/96H01J61/56
    • A lighting unit is described utilizing an energy efficient metal vapor arc lamp as the main source of light supplemented by a standby filamentary light source producing light when the arc lamp is being started. The lighting unit is designed as a more efficient replacement for the incandescent lamp. The lighting unit includes means for conversion of 60 hertz ac to dc, and a dc energized operating network, including a ferrite transformer and an intermittently operated switching transistor serially connected with a load consisting of the filament or the arc lamp, or both, to which regulated output power is provided. The operating network produces an output with minimum dissipation adapted to each operating state of the arc lamp, including the provision of a high ignition potential, adequate power for the lamp during the glow to arc transition, warm-up and ballasting. In addition, while the arc lamp is being started, the operating network provides power for lighting the standby filament.
    • 使用能量有效的金属蒸汽弧光灯作为主要光源来描述照明单元,该电源补充有待弧光灯起动时产生光的备用丝光光源。 照明单元被设计为更有效地替代白炽灯。 照明单元包括用于将60赫兹交流转换为直流的装置,以及直流通电操作网络,包括铁氧体变压器和与由灯丝或弧光灯组成的负载串联连接的间歇操作的开关晶体管,或两者,其中 提供调节输出功率。 操作网络产生的输出具有适应于弧光灯的每个操作状态的最小耗散,包括提供高的点火电位,在发光到电弧转换,预热和压载期间灯的足够的功率。 另外,当弧光灯正在启动时,操作网络提供用于照亮待机灯丝的电源。