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公开(公告)号：US5863147A
公开(公告)日：1999-01-26
申请号：US647559
申请日：1996-05-14
申请人： David E. Pressler
发明人： David E. Pressler
CPC分类号： E01B2/006 , E01B1/00 , E01B1/008 , E01B3/40 , E01C3/00 , E01C3/06 , E01C7/14 , E01B1/001 , E01B1/002 , E01B2204/07
摘要： A rigid concrete slab for conveying vehicular or railroad traffic which is provided with functional longitudinal beams that extend or protrude downward from the underside of the slab and are fully and continuously supported by the underlying material. The attached beams enhance, strengthen and stabilize both longitudinally and transversely. Friction and suction, or interface adhesion, between the beams and the underlying material in which it rests causes the beams to act as anchors thereby further resisting displacement or distortion of the slab.
摘要翻译： 用于输送车辆或铁路交通的刚性混凝土板，其具有从板坯的下侧向下延伸并由下面的材料完全和连续地支撑的功能纵向梁。 连接的梁增强，加强和纵向和横向稳定。 梁与其所在的下层材料之间的摩擦和吸力或界面粘合导致梁作为锚固件，从而进一步抵抗板的位移或变形。
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公开(公告)号：US06705736B1
公开(公告)日：2004-03-16
申请号：US10004899
申请日：2001-12-03
申请人： David E. Pressler
发明人： David E. Pressler
IPC分类号： G02B510
摘要： A light-gathering device for concentrating light. The light-gathering device may be used as a stand-alone telescope or as an attachment to a standard telescope. When used as an attachment to a standard telescope, the light-gathering device increases the effective aperture size of the telescope. The light-gathering device is comprised of two conical sections with highly polished mirrored surfaces. The larger of the two conical sections is orientated such that the large end faces toward the object to be viewed. Light enters the area between the two conical sections and is condensed within the sections until it exits from the device in a more concentrated form.
摘要翻译： 一种用于聚光的聚光装置。 集光装置可以用作独立的望远镜或作为标准望远镜的附件。 当用作标准望远镜的附件时，聚光装置增加了望远镜的有效孔径尺寸。 集光装置由具有高度抛光的镜面的两个锥形部分组成。 两个锥形部分中较大的一个被定向成使得大的端部朝向待观察的物体。 光进入两个锥形部分之间的区域，并在该部分内冷凝，直到它们以更集中的形式从装置出来。
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