公开(公告)号：US5956856A

公开(公告)日：1999-09-28

申请号：US990223

申请日：1997-12-15

Applicant: Chiang-Wen Chen ,  Chiang-Ming Chen

Inventor： Chiang-Wen Chen ,  Chiang-Ming Chen

IPC: B43L13/04 ,  A47B27/00

CPC classification number: B43L13/041

Abstract: A drawing board assembly includes a rectangular board including two opposite end portions each having a side wall transversely defining an elongate guiding track therein and a top wall. Two inverted L-shaped sliding bases are each slidably supported on a corresponding one of the two end portions of the board and each include a first plate abutting on the top wall and a second plate abutting on the side wall. Two slides are each fixedly mounted on the second plate of a corresponding one of the two sliding bases and are each slidably received in the guiding track A ruler is slidably mounted on the board, and an elongate frame is fixedly mounted on the ruler and includes two end portions each connected with the first plate of a corresponding one of the two sliding bases.

Abstract translation: 绘图板组件包括矩形板，其包括两个相对的端部，每个端部具有横向限定其中的细长导轨的侧壁和顶壁。 两个倒置的L形滑动基座各自可滑动地支撑在板的两个端部中的对应的一个上，并且每个都包括抵靠在顶壁上的第一板和邻接在侧壁上的第二板。 两个滑块各自固定地安装在两个滑动底座中相应的一个的第二板上，并且每个滑动件可滑动地容纳在导轨中。标尺可滑动地安装在板上，并且细长框架固定地安装在尺上，并且包括两个 每个与两个滑动基座中对应的一个的第一板连接的端部。

公开(公告)号：US5187873A

公开(公告)日：1993-02-23

申请号：US827348

申请日：1992-01-29

Applicant: Bill C. B. Jeng ,  Chiang-Ming Chen

Inventor： Bill C. B. Jeng ,  Chiang-Ming Chen

IPC: B43L13/00

CPC classification number: B43L13/00

Abstract: A protractor including a base having a curved surface formed in an upper portion, a disc including a circular outer peripheral surface for slidable engagement with the curved surface of the base, the disc including an opening, a pair of flanges formed in parallel in the opening, and a slide including two end portions slidably engaged with the flanges of the disc so that the slide can be guided to slide along the flanges, whereby various geometric figures can be drawn by the protractor when the disc rotates relative to the base and when the slide slides along the flanges.

Abstract translation: 一种量角器，包括具有形成在上部的弯曲表面的基部，盘包括用于与基部的曲面滑动接合的圆形外周面，该盘包括开口，一对凸缘， 以及滑动件，其包括两个端部与盘的凸缘可滑动地接合，使得滑动件可以被引导以沿着凸缘滑动，由此当盘相对于基座旋转时，量角器可以绘制各种几何图形， 沿着法兰滑动滑块。

公开(公告)号：US5386640A

公开(公告)日：1995-02-07

申请号：US252205

申请日：1994-06-01

Applicant: Chiang-Ming Chen ,  Kun-Mao Chen

Inventor： Chiang-Ming Chen ,  Kun-Mao Chen

IPC: B43L1/04 ,  B43L13/04 ,  B43L13/02

CPC classification number: B43L1/045 ,  B43L13/046

Abstract: A drafting device includes a pair of magnetic boards securely mounted to upper and lower surfaces of a base frame respectively, a ruler movably engaged on the magnetic board, a pair of cavities defined in each of the four corners of the lower surface of the base frame, and a protrusion being formed between the pair of cavities. A guiding member is securely mounted to each of the four corners of the base frame and includes a locking block having a first wall member and a second wall member mounted on the upper and lower surfaces of the base frame respectively, a slot being defined in the second wall member through which the protrusion is received, a recess defined in an underside of the locking block between the first and second wall members and having a width equal to the distance between a bottom face of the cavity and the upper surface of the base frame. A guiding line loops around each of the guiding members and passes through two ends of the ruler.

Abstract translation: 牵引装置包括一对牢固地安装在基架的上表面和下表面上的磁性板，可动地接合在磁性板上的标尺，一对限定在底架的下表面的四个角中的一个空腔 并且在所述一对空腔之间形成有突起。 引导构件被牢固地安装到基架的四个角中的每一个，并且包括锁定块，该锁定块具有分别安装在基架的上表面和下表面上的第一壁构件和第二壁构件， 第二壁构件，突出部被容纳在该第二壁构件中，限定在第一和第二壁构件之间的锁定块的下侧中的凹部，其宽度等于空腔的底面与基架的上表面之间的距离 。 引导线围绕每个引导构件环绕并且穿过尺子的两端。