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公开(公告)号：US5433166A
公开(公告)日：1995-07-18
申请号：US242025
申请日：1994-05-12
CPC分类号： B61L5/1836 , F21V19/00 , F21W2111/02
摘要： A light signal provides fixed focus and the ability to service the device solely from the rear. This light signal comprises a housing having a rear entry for desired maintenance and an immovable front wall, the lens mount containing a lens unit that is removable secured to an inside surface of the immovable front wall of the housing. Each lens mount includes a fixed focusing means having a receptacle for operative receipt of a light means, wherein the fixed focusing means is positioned at the end of the lens mount nearest an inner lens; whereby the focus of the light means is fixed relative to the lens unit.
摘要翻译： 光信号提供固定焦距和仅从后方维修设备的能力。 该光信号包括具有用于期望维护的后入口和不可移动的前壁的壳体，该透镜座包含透镜单元，该透镜单元可拆卸地固定到壳体的不可移动前壁的内表面。 每个透镜支架包括固定的聚焦装置，其具有用于操作地接收光装置的插座，其中固定聚焦装置位于最靠近内透镜的透镜安装座的端部; 由此光装置的焦点相对于透镜单元是固定的。
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公开(公告)号：US5909182A
公开(公告)日：1999-06-01
申请号：US154978
申请日：1998-09-17
CPC分类号： G08G1/095 , H05K1/0218
摘要： A vandal resistant light signal unit consisting of a modular integrated circuit arrangement having an insulative circuit board, which has a first broad area layer of conductive material on one side of the circuit board and a second broad area layer on an opposite side of the circuit board. The first layer defines a positive energy plane and the second a negative energy plane. Also, the unit has a plurality of independent series circuits connected in parallel to respective spaced points or nodes on the oppositely located layers of conductive material. Moreover, the broad area layers are connected to opposite sides of a power supply, and these layers constitute an arrangement for resisting vandalism occasioned by projectiles directed at said light signal unit.
摘要翻译： 一种防破坏光信号单元，由具有绝缘电路板的模块化集成电路装置组成，该绝缘电路板在电路板的一侧上具有导电材料的第一宽区域层和电路板的相对侧上的第二宽区域层 。 第一层限定正能量平面，第二层为负能量平面。 此外，该单元具有多个独立的串联电路，并联连接到相对定位的导电材料层上的相应间隔的点或节点。 此外，广域层连接到电源的相对侧，并且这些层构成抵抗由针对所述光信号单元的射弹引起的破坏的布置。
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