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1. 发明授权

US06357128B1 Low profile compass with removable protective cover and magnetic bull's eye alignment system 失效
标题翻译：低调的罗盘，带有可拆卸的防护罩和磁力牛眼对准系统
公开(公告)号：US06357128B1
公开(公告)日：2002-03-19
申请号：US09123071
申请日：1998-07-27
申请人： Marlin D. Iden
发明人： Marlin D. Iden
IPC分类号： G01C1702
CPC分类号： G01C17/04
摘要： A low profile compass of the type including a transparent base member and fluid-filled vial contains a directional indicator in the vial in the form of a circle which is alignable with another circle imprinted on the vial. A hinged cover assembly can be detented to selected positions and includes a mirrored sight line for direct line sighting, and a lower protective cover or shoe for the base of the compass also serves as a receptacle for instruction sheets and scales for use in taking directional readings as well as for orientation alignment on a topographic map and inclinometer readings.
摘要翻译：包括透明基底构件和流体填充的小瓶类型的薄型罗盘包含小瓶形式的方向指示器，其可与压印在小瓶上的另一圆对齐。铰接盖组件可以定位到选定的位置，并且包括用于直接瞄准的镜面瞄准线，并且用于罗盘底部的下保护盖或鞋也用作用于取向方向读数的指示纸和秤的插座以及在地形图和倾斜仪读数上的取向对准。

2. 发明授权

US06523271B2 Method of adjusting drive current of magnetism sensor and electronic azimuth meter 有权
公开(公告)号：US06523271B2
公开(公告)日：2003-02-25
申请号：US09910111
申请日：2001-07-20
申请人： Kazuo Kato
发明人： Kazuo Kato
IPC分类号： G01C1702
CPC分类号： G01C17/38
摘要： To reduce a dispersion in a sensitivity of a magnetism detecting circuit driving, by current, a magnetism sensor comprising magnetism resistance elements in a bridge constitution to a dispersion in a sensitivity of a magnetism sensor. An electronic azimuth meter is provided with EEPROM and drive current set values are previously stored to EEPROM. The drive current set values are calculated by a predetermined calculation by measuring bridge resistance of a magnetism sensor of the electronic azimuth meter. In detecting magnetism by the magnetism sensor, CPU controls a sensor drive circuit based on the drive current set values stored to EEPROM. Thereby, the sensor drive circuit supplies a magnetism sensor with optimum drive current in accordance with a bridge resistance value thereof.

3. 发明授权

US06826842B2 Azimuth meter 失效
标题翻译：方位计
公开(公告)号：US06826842B2
公开(公告)日：2004-12-07
申请号：US10474131
申请日：2003-10-06
申请人： Yasunori Abe , Osamu Shimoe
发明人： Yasunori Abe , Osamu Shimoe
IPC分类号： G01C1702
CPC分类号： G01R33/093 , B82Y25/00 , G01C17/30
摘要： To provide a thin and small area azimuth meter. A plane coil and at least two groups of thin film magneto resistive elements are arranged. Each of the groups of thin film magneto resistive elements constitutes an MR bridge and detects and outputs two perpendicular components of the earth magnetism, and bearing information is obtained based on the output values.
摘要翻译：提供一个薄而小的方位角计。布置有平面线圈和至少两组薄膜磁阻元件。薄膜磁阻元件组中的每一个构成MR桥，并且检测并输出地磁的两个垂直分量，并且基于输出值获得轴承信息。

4. 发明授权

US06282802B1 Hand-held needleless compass 有权
标题翻译：手持无针罗盘
公开(公告)号：US06282802B1
公开(公告)日：2001-09-04
申请号：US09134449
申请日：1998-08-14
申请人： Marlin D. Iden
发明人： Marlin D. Iden
IPC分类号： G01C1702
CPC分类号： G01C17/04
摘要： A multi-function, hand-held compass is made up of a base member having a compass vial at one end and a socket at the opposite end to releasably attach to a clip. A lateral depression is formed in the base member to facilitate gripping of the compass, and a dual-prism sighting system is disposed at the opposite end of the base member to that of the vial. Graduated markings for a protractor are formed in surrounding relation to the compass vial along with pie-shaped recesses and magnifying lenses in the base both to take azimuth readings and map readings.
摘要翻译：多功能手持罗盘由在一端具有罗盘小瓶的基座构件和在相对端处的插座构成，以可释放地附接到夹子。在基部构件中形成侧向凹陷以便于夹持罗盘，并且双棱镜瞄准系统设置在基座构件的与小瓶的相对端上。量角器的刻度标记形成与罗盘小瓶的周围关系以及基座中的饼形凹槽和放大镜，以便获取方位读数和地图读数。

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