公开(公告)号：US06449854B1

公开(公告)日：2002-09-17

申请号：US09705983

申请日：2000-11-03

申请人： Kwok Pun Cheung

发明人： Kwok Pun Cheung

IPC分类号： G01C1734

CPC分类号： G09B25/04

摘要： An apparatus for estimating a shadow on a scaled figure is presented herein. The apparatus includes a circular disk with a lines corresponding to the declination angle of the earth with respect to the sun at particular dates of the year. The apparatus also includes arcs on the circular disk which correspond to the earth's rotation at particular times of the day. The circular disk can also have a slot to facilitate insertion of a pencil or pen time therein. The circular disk is substantially transparent to enable a user to lay the disk over a scaled figure and make calculations and measurements corresponding to a shadow to be estimated. Also disclosed is a method for estimating a shadow for a structure depicted in a scaled figure. The circular disk is placed over the scaled figure such that the slot in the disk is aligned with an azimuth of the sun so as to trace a shadow line. The circular disk is then reoriented perpendicular to the shadow line so that a scaled height line may be traced. The circular disk is then relocated so that the center of the slot is located at the end of the scaled height line. The circular disk is then rotated to an angle corresponding to the height of the sun and a projection line is traced in the slot from the end of the scaled height line to the shadow line. In this manner, the length of the shadow for a given azimuth and altitude can be determined.

摘要翻译： 本文给出了一种用于估计缩放图上的阴影的装置。 该装置包括圆形盘，其具有对应于地球相对于一年中特定日期的太阳的倾角的线。 该装置还包括圆盘上的圆弧，其对应于当天特定时间的地球旋转。 圆盘还可以具有槽以便于在其中插入铅笔或笔的时间。 圆盘基本上是透明的，以使用户能够将光盘放置在比例尺上的图形上，并进行与要估计的阴影对应的计算和测量。 还公开了一种用于估计缩放图中描绘的结构的阴影的方法。 将圆盘放置在缩放图上，使得盘中的槽与太阳的方位对准，以便跟踪阴影线。 然后圆形盘垂直于阴影线重新定向，从而可以跟踪缩放的高度线。 然后将圆盘重新定位，使得槽的中心位于缩放高度线的末端。 然后将圆盘旋转到与太阳的高度相对应的角度，并且将投影线从缩放的高度线的末端到阴影线在狭缝中追踪。 以这种方式，可以确定给定方位角和高度的阴影长度。

公开(公告)号：US06523270B1

公开(公告)日：2003-02-25

申请号：US09924286

申请日：2001-08-08

申请人： Kwok Pun Cheung

发明人： Kwok Pun Cheung

IPC分类号： G04B4902

CPC分类号： G04B49/02

摘要： An apparatus for use with a source of light including a first orientation device that includes a latitude scale, a latitude pointer rotatable about a first axis relative to the latitude scale, and a platform configured to support an architectural model. The platform is mounted on the latitude pointer such that rotation of the pointer about the first axis produces a corresponding change in the position of the platform relative to the latitude scale. The apparatus also includes a second orientation device that includes a time scale and a time pointer rotatable about a second axis relative to the time scale. The first orientation device is mounted on the time pointer such that rotation of the time pointer about the second axis produces a corresponding change in the position of the platform relative to the time scale without changing the position of the platform relative to the latitude scale. The apparatus further includes a third orientation device that includes a day of the year scale, a gnomon operatively oriented relative to the day of the year scale, and a universal joint supporting the third orientation device for movement relative to a source of light. The second orientation device is mounted on the third orientation device such that movement of the third orientation device on the universal joint produces a corresponding change in the position of the platform relative to the source of light without changing the position of the time pointer relative to the time scale or the position of the platform relative to the latitude scale.

摘要翻译： 一种用于光源的装置，包括包括纬度的第一定向装置，可围绕第一轴相对于纬度标尺旋转的纬度指针，以及被配置为支撑建筑模型的平台。 平台安装在纬度指示器上，使得指针围绕第一轴的旋转产生平台相对于纬度尺的位置的相应变化。 该装置还包括第二定向装置，其包括相对于时标可绕第二轴转动的时标和时间指针。 第一定位装置安装在时间指针上，使得时间指针围绕第二轴的旋转产生平台相对于时标的位置的相应变化，而不改变平台相对于纬度标度的位置。 该装置还包括第三取向装置，其包括年龄标尺的日期，相对于年龄的日期可操作地定向的gnomon，以及支撑相对于光源移动的第三定向装置的万向节。 第二取向装置安装在第三取向装置上，使得第三取向装置在万向接头上的运动在相对于光源的位置产生相对于光源的位置的相应变化，而不改变时间指针相对于光源的位置 时间尺度或平台相对于纬度尺度的位置。

公开(公告)号：US06889776B2

公开(公告)日：2005-05-10

申请号：US09922871

申请日：2001-08-06

申请人： Kwok Pun Cheung

发明人： Kwok Pun Cheung

IPC分类号： B64D1/16 ,  B64D1/18 ,  A62C25/00

CPC分类号： B64D1/16 ,  B64D1/18

摘要： An apparatus is for use with a container of liquid that is suspended from an aircraft flying over a ground target area. The container has an outlet through which the liquid is dropped from the container. The apparatus includes a diffuser configured to diffuse the liquid exiting the container outlet horizontally outward beyond the container into the air above the ground target area, whereby the liquid is diffused over a correspondingly wide area. The liquid can be fire extinguishing liquid, and the ground target area can be a forest fire.

摘要翻译： 一种装置用于与飞行在地面目标区域上的飞机悬挂的液体容器。 容器具有出口，液体通过该出口从容器中落下。 该装置包括扩散器，该扩散器被配置为使从容器出口出来的液体水平地向外延伸超过容器进入地面目标区域上方的空气，由此液体扩散到相应的广泛区域上。 液体可以是灭火液，地面目标区域可以是森林火灾。