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公开(公告)号：US664727A
公开(公告)日：1900-12-25
申请号：US1900009676
申请日：1900-03-22
发明人： DAY WILLIAM C
CPC分类号： B43L9/20
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公开(公告)号：US20040226180A1
公开(公告)日：2004-11-18
申请号：US10833837
申请日：2004-04-27
发明人： Roy O. Solum
IPC分类号： B43L009/02
CPC分类号： B43L9/02 , B43L9/20 , B43L11/041
摘要： A safe, stable compass for making circles and ellipses, having a stable rotating platform with a variably adjustable arm that allows the device to be self-supporting upon a surface and to be easily rotated in any one of a variety of directions around a single rotating point. The invention allows persons of limited manual dexterity to apply force in one location and then to rotate the entire device around this one point.
摘要翻译： 一个安全，稳定的制作圆形和椭圆形的指南针，具有一个稳定的旋转平台，带有一个可调节的臂，允许该装置在一个表面上自支撑，并且可以绕单个旋转的任意一个方向转动 点。 本发明允许有限手动灵巧的人在一个位置施加力，然后围绕该一点旋转整个装置。
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公开(公告)号：US5979066A
公开(公告)日：1999-11-09
申请号：US894237
申请日：1997-09-15
CPC分类号： B43L9/20
摘要： The compass according to the invention comprises a compass top and two compass legs (1,2) mounted rotatably in the compass top, the compass top comprising two top-halves (3,4). Provided in each compass-top half is a bearing pivot (19) for respectively bearing a compass leg, as well as a counter-core (20) which, in the assembled state, engages in the bearing pivot of the corresponding compass-top half. A permanent and even radial frictional clamping is thus produced. At the same time, the counter-cores bring about a limitation to the opening of the compass due to corresponding in the compass legs.
摘要翻译： PCT No.PCT / BR96 / 00003 Sec。 371日期：1997年9月15日 102（e）日期1997年9月15日PCT 1996年1月25日PCT公布。 第WO96 / 22889号公报 日期1996年8月1日根据本发明的罗盘包括罗盘顶部和可旋转地安装在罗盘顶部的两个罗盘腿（1,2），罗盘顶部包括两个前半部（3,4）。 在每个罗盘上半部设置有用于分别承载罗盘腿的轴承枢轴（19）以及在组装状态下与相应的罗盘上半部的轴承枢轴接合的反核（20） 。 因此产生永久且均匀的径向摩擦夹紧。 同时，由于相应的指南针腿，反核心带来对罗盘开放的限制。
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公开(公告)号：US4104801A
公开(公告)日：1978-08-08
申请号：US817104
申请日：1977-07-19
申请人： Raymond A. Payton
发明人： Raymond A. Payton
摘要： A drawing instrument comprises a pair of limbs pivoted together at their inner ends to form an assembly. A bow top has an interior hole and fork limbs embracing the assembly of the inner ends of the pivoted limbs. The fork limbs include pivot holes for receiving the pivot which connects the pivoted limbs to the bow top. A centralizing member is held between and is keyed to the inner ends of the pivoted limbs. A portion of the centralizing member projects upwardly into the interior hole of the bow top. The centralizing member includes an elongated pivot receiving hole. The centralizing member is effective to press against a side wall of the hole in the bow top to cause the bow top to turn and keep central upon any angular movement of one of the pivoted limbs with respect to the other pivoted limb. The bow top includes locating means cooperable with the inner ends to prevent movement of the inner ends toward the bow top beyond a position in which the pivot receiving holes in the inner ends and the bow top are aligned for receiving the pivot. This movement is prevented during the assembly of the instrument with the centralizing member being keyed in place between the inner ends of the two pivoted limbs which are positioned together, side by side, but before the installation of the pivot.
摘要翻译： 绘图仪器包括一对在其内端枢转在一起以形成组件的四肢。 弓形顶部具有内孔和叉形四肢，其包围枢转的四肢的内端的组件。 叉肢包括枢转孔，用于接收将枢转的肢体连接到弓顶的枢轴。 中心构件保持在枢转的四肢的内端之间并且与其枢转。 集中构件的一部分向上突出到弓顶的内孔中。 集中构件包括细长的枢轴接收孔。 集中构件有效地压靠弓顶中的孔的侧壁，以使弓形顶部转动并保持中心，使得枢转的四肢之一相对于另一个枢转的肢体发生任何角度运动。 弓形顶部包括与内端配合的定位装置，以防止内端朝着弓顶移动超过其内端中的枢转接收孔和弓形顶部对准以便接收枢轴的位置。 在组装仪器期间防止了这种运动，其中中心构件被键合在位于两个枢转的四肢的内端之间并排放置在一起但是安装枢轴之前的位置。
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公开(公告)号：US2794259A
公开(公告)日：1957-06-04
申请号：US42493854
申请日：1954-04-22
申请人： PROEBSTER JR C
发明人： RUDOLF ESCHENBACH
IPC分类号： B43L9/20
CPC分类号： B43L9/20
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