公开(公告)号：US3757217A

公开(公告)日：1973-09-04

申请号：US3757217D

申请日：1971-08-20

Applicant: WESTON INSTRUMENTS INC

Inventor： PEARSON D

IPC: G01R1/28 ,  G01R5/04 ,  G01R11/02 ,  G01R1/00 ,  G01R35/00

CPC classification number: G01R5/04 ,  G01R1/28 ,  G01R11/02

Abstract: A D''Arsonval type moving coil meter with linear scale deflection characteristics. The magnetic circuit of the meter is such that the sum total of flux which cuts the coil is the same for any operative position of the coil. Correspondingly, angular deflection of the coil is in direct proportion to the current in the coil. The magnetic circuit includes a magnet having fixed locating surfaces thereon which cooperate with fixed locating surfaces on a yoke. This locating arrangement assures that the sum total of flux which cuts the coil is the same for any operative position of the coil and further assures repeatable accuracy in successively assembled meters. The meter is calibrated by magnetizing the magnet to obtain full scale deflection when rated current is applied to the meter terminals. Where a calibrating resistor is used, the resistor is connected to the meter prior to calibration with the result that accuracy of the meter is assured without the need for using a precision resistor.

公开(公告)号：US3771489A

公开(公告)日：1973-11-13

申请号：US3771489D

申请日：1971-08-20

Applicant: WESTON INSTRUMENTS INC

Inventor： PEARSON D

IPC: G01D13/22

CPC classification number: G01D13/22

Abstract: A moving coil assembly of a meter has an integral pointer mounting staff. The pointer takes the form of a thin wall tubular body formed from a dimensionally stable plastic material with memory characteristics such as polysulfone. A second embodiment of the pointer has its end flattened to present a thin knife blade profile. Either pointer is readily mounted on the staff of the moving assembly merely by pushing the pointer over the staff to a seated position as determined by stop edges adjacent the base of the staff. Because of its memory characteristics the pointer will straighten itself even though it is impacted against a stop with sufficient force to initially bend the pointer.

Abstract translation: 仪表的动圈组件具有整体的指针安装人员。 该指针采用由具有记忆特性如聚砜的尺寸稳定的塑料材料形成的薄壁管状体的形式。 指针的第二实施例的端部被平坦化以呈现薄的刀片轮廓。 任何一个指针都可以轻松地安装在移动组件的工作人员上，只需将工具上的指针推到一个就座的位置上，这是由与工作人员的基座相邻的止动边确定的。 由于其记忆特性，指针将自动伸直，即使它以足够的力冲击停止，以最初弯曲指针。

公开(公告)号：US3764909A

公开(公告)日：1973-10-09

申请号：US3764909D

申请日：1971-08-20

Applicant: WESTON INSTRUMENTS INC

Inventor： PEARSON D

IPC: G01R1/04 ,  G01R1/08 ,  G01R1/10 ,  G01R1/12 ,  G01R1/16 ,  G01R5/04 ,  G01R5/06 ,  G01R1/00

CPC classification number: G01R5/06 ,  G01R1/12 ,  G01R1/16 ,  G01R5/04

Abstract: An electric meter particularly characterized by a small number of moving parts and simplified assembly by virtue of fixed cooperating locating surfaces on the elements and sub-assemblies of the meter. A magnetic circuit including a yoke and magnet are constructed to snap into an insulating base in a predetermined position on the base. A coil assembly initially including integral elements for connection of pivot bearings or taut bands is accurately positioned for rotation on the supporting base by inserting the assembly into the base. Cooperating locating surfaces provide for accurate predetermined positioning of the axis of rotation of the coil relative to the magnetic circuit. Additional features of the meter construction reside in a direct gear drive between a zero adjust element and zero adjust knob mounted in a cover for the meter, a unique base, casing, and cover which snap together, a coil support form of unique construction and which includes motion limiting elements which limit the permissible extent of movement of the coil in the event of shock or impact to positions well within the elastic limit of the supports which mount the coil for rotation, a unique mode of terminating the end connections for the coil without the need for stripping insulation, a unique mounting arrangement for the assembled meter, a unique rear mounting scale plate which provides for easily replacing scale plates to meet the needs of the user of the meter, a meter movement of a single size adapted to be used with casings and scales of various sizes whereby the number of different parts required to form meters of different sizes is maintained at a minimum, a unique insulating material base with flexibility to permit expanding the base during assembly of the meter, and sub-assemblies, components, and elements which can be assembled in only one position and orientation to assure proper assembly of the meter.

Abstract translation: 一种电表，其特征在于具有少量的运动部件，并且通过仪表的元件和子组件上的固定的配合定位表面来简化组装。 包括磁轭和磁体的磁路被构造为在基座上的预定位置卡扣到绝缘基座中。 最初包括用于枢转轴承或拉紧带的连接的整体元件的线圈组件通过将组件插入基座而被精确地定位以便在支撑基座上旋转。 配合定位表面提供线圈相对于磁路的旋转轴线的精确预定义。 仪表结构的附加特征在于零调节元件和零调节旋钮之间的直接齿轮传动，该零调节旋钮安装在用于仪表的盖中，独特的底座，壳体和盖子，其卡合在一起，具有独特结构的线圈支撑形式， 包括运动限制元件，其限制在发生冲击或冲击的情况下线圈的允许运动程度，该位置恰好在安装线圈以旋转的支撑件的弹性极限内的位置，一种终止线圈的端部连接的独特模式， 需要剥离绝缘，为组装的仪表提供独特的安装布置，独特的后安装秤，可轻松替换刻度板，以满足仪表用户的需求，适合使用的单一尺寸的仪表移动 具有各种尺寸的外壳和秤，由此将形成不同尺寸的米所需的不同部件的数量保持在最小，独特的绝缘马 能够灵活地允许在组装仪表期间扩展基座，以及可以仅在一个位置和方向组装的子组件，部件和元件，以确保仪表的正确组装。