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    • 4. 发明授权
    • Automatic lighted level and angle finder
    • 自动点亮水平仪和测角仪
    • US4003134A
    • 1977-01-18
    • US602307
    • 1975-08-06
    • David Adams
    • David Adams
    • G01C9/06
    • G01C9/06
    • An automatic lighted level and a angle finder has a frame provided with a planar surface arranged for abutting against an object the orientation of which is to be determined or adjusted. An electrically energized visual indicator is mounted in the frame of the device for indicating when the planar surface of the frame is oriented at a predetermined angle by the closing of an angle-sensing switch including a reel assembly adjustably mounted in an opening provided in the frame and connected to the indicator and to a source of electrical power for energizing the indicator by closing an electrical circuit connecting the indicator to the source of electrical power when the switch is rotated relative to the frame to an angle corresponding to the angle of an object whose angular orientation is being determined. Alternatively, the planar surface may be placed on the object and the latter moved until its orientation corresponds to a predetermined angle set on the switch. A circular scale graduated in degrees cooperating with a pointer provides a visual indication of the angular setting of the switch.
    • 自动点亮水平仪和角度测量器具有设置有平坦表面的框架,该平面布置成抵靠要确定或调整取向的物体。 电气可视指示器安装在装置的框架中,用于指示框架的平面如何通过关闭角度感测开关而被定向成预定角度,该角度感测开关包括可调节地安装在设置在框架中的开口中的卷轴组件 并且连接到所述指示器和电源,用于通过在所述开关相对于所述框架旋转时闭合将所述指示器连接到所述电力源的电路,从而使所述指示器通电,使其与所述对象的角度相对应的角度 正在确定角度定向。 或者,平面表面可以放置在物体上,后者移动到其取向对应于设置在开关上的预定角度。 与指针配合刻度的圆形刻度提供了开关角度设置的可视指示。