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1. 发明授权

US4490777A Selective color illumination device for electronic drafting tables 失效
标题翻译：电子绘图台的选择性彩色照明装置
公开(公告)号：US4490777A
公开(公告)日：1984-12-25
申请号：US277179
申请日：1981-06-25
申请人： Stephen E. Tanner , Eugene J. Tanner
发明人： Stephen E. Tanner , Eugene J. Tanner
IPC分类号： B43L5/00 , F21V9/40 , F21S3/00
CPC分类号： F21V9/10 , B43L5/007
摘要： A multiple light device for the illumination of bicolored translucent self adhesive tape drawings, principally used in electronic circuit drafting, which through the principal of selective absorption highlights the contrast and or color difference between the two tapes. The device is designed to replace the fluorescent lamps in light tables used in viewing the drawings without any modifications necessary to the table or lamp sockets and provides a means of illuminating the table surface with a manually selected limited spectrum light or an approximated white light by moving a magnetic field generating device, typically a magnet, over the top surface of the table on the underside of which is affixed, by adhesive, three magnetic field sensing devices forming an electrical circuit between the original lamp socket in the table and one of the three new lamp sockets supported by radially and laterally adjustable support members connected to the main support member, which includes pin contacts at each end and is of a size and configuration so as to easily fit in the original fluorescent lamp socket in the table with said contacts being attached to wires emerging from the center of the tubular main support member, connected to the switching devices and to the new lamp sockets of this device.
摘要翻译：一种用于照明双色半透明自粘胶带图纸的多光装置，主要用于电子电路牵伸，其通过选择性吸收的主要突出显示了两个胶带之间的对比度或色差。该装置被设计成替换用于观察图纸的光台中的荧光灯，而不需要对桌子或灯插座进行任何修改，并且通过移动来提供用手动选择的有限光谱光或近似的白光照亮台面的装置一个磁场产生装置，通常是一个磁体，位于台面的上表面上，其底面上通过粘合剂固定三个磁场感测装置，这三个磁场感测装置在表格中的原始灯插座和三个之间的一个之间形成一个电路新的灯座由连接到主支撑构件的径向和侧向可调节的支撑构件支撑，该支撑构件在每个端部包括销触点，并且具有尺寸和构造，以便容易地装配在桌子中的原始荧光灯插座中，连接到从管状主支撑构件的中心出来的连接到开关装置的电线该设备的新灯插座。

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