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    • 42. 发明授权
    • Sensing apparatus
    • 感应装置
    • US3777165A
    • 1973-12-04
    • US3777165D
    • 1972-03-31
    • ELECTRONICS CORP AMERICA
    • BRYANT JTHOMSON E
    • B65G47/49G06K7/10G01N21/30
    • G06K7/10871B65G47/493
    • Scanning apparatus includes a linear array of sensors so that there is effectively a series of independent sensor elements disposed in aligned relation generally perpendicular to a scanning axis. Each sensor is arranged to provide a data output in response to a sensed code mark and an output channel is coupled to each sensor. Logic responsive to detection of a first code mark by a sensor of the array enables at least one code sensitive group of output channels and disables other output channels so that only a limited group of channels are rendered responsive to subsequently detected code marks.
    • 扫描装置包括线性阵列的传感器,使得有效地一系列独立的传感器元件以大致垂直于扫描轴的对齐关系设置。 每个传感器被布置成响应于感测的代码标记提供数据输出,并且输出通道耦合到每个传感器。 响应于由阵列的传感器检测到第一代码标记的逻辑使能至少一个代码敏感的输出通道组,并且禁用其他输出通道,使得只响应于随后检测到的代码标记而形成有限的通道组。
    • 44. 发明授权
    • Electrical circuitry
    • 电气电路
    • US3710149A
    • 1973-01-09
    • US3710149D
    • 1971-06-21
    • ELECTRONICS CORP AMERICA
    • THOMSON E
    • F23N5/08F23N5/24H03K17/00
    • F23N5/242F23N5/082F23N2031/04
    • The invention describes a fail safe voltage responsive circuit for producing an output level indicative of the relationship between two voltage levels. The voltage responsive circuit includes a fail-safe comparison circuit which assumes alternative modes in response to an alternating signal introduced into the comparison circuit when the voltage levels are within a predetermined range, one relative to the other. When the voltage levels are outside the range or if a component fails, the comparison circuit ceases to alternate between modes. The voltage responsive circuit is used in a preferred application involving a fail-safe combustion control system wherein one voltage level is used to supply bias current to a photoconductive cell, the cell sensing the presence or absence of flame.
    • 本发明描述了一种用于产生指示两个电压电平之间的关系的输出电平的故障安全电压响应电路。 电压响应电路包括故障安全比较电路,当电压水平在相对于另一个的电压水平在预定范围内时,该故障安全比较电路响应于引入到比较电路中的交流信号而采取替代模式。 当电压电平超出该范围或组件发生故障时,比较电路将停止在模式之间交替。 电压响应电路用于涉及故障安全燃烧控制系统的优选应用中,其中一个电压电平用于向光导电池提供偏置电流,该电池感测是否存在火焰。