公开(公告)号：US4206000A

公开(公告)日：1980-06-03

申请号：US962592

申请日：1978-11-21

申请人： Donald W. Schuchardt ,  Robert W. Strickland

发明人： Donald W. Schuchardt ,  Robert W. Strickland

IPC分类号： B03C1/28 ,  B08B7/04 ,  B01D35/06

CPC分类号： B03C1/28

摘要： A floatable magnetic filter screen (10, 40, 52, 60) for removing metallic debris from work-functioning baths (26, 26') comprises a tubular rectangular outer frame (11, 11', 14, 14', 16, 61) that supports a plurality of magnet-forming webs (18, 18', 62), in a predetermined array, within the central opening thereof. The magnets (23, 23', 64) of each web, when required, are encapsulated within a protective material covering (e.g., 19, 19') so as to physically isolate them from a given bath (26, 26') within which the filter screen (10, 40, 52, 60) is to be employed. While the filter screen is adapted to normally float on the surface of a given bath, through piece part (33, 33', 53) initiated immersion of the filter screen in the bath, preferably using a piece part-carrying basket (36, 36', 51), the bath solution is effectively forced through the filter screen during both the downward and subsequent upward displacement of the latter. As a result of such reciprocal displacement, any loose metallic debris (38) in the bath is magnetically drawn against magnet-defined sites on the filter screen, and may be readily removed periodically therefrom, such as with a simple water spray (39).

摘要翻译： 用于从工作功能浴（26,26'）去除金属碎屑的可浮动磁性过滤网（10,40,52,60）包括管状的矩形外框架（11,11'，14,14'，16,61） 其在其中心开口内以预定的阵列支撑多个磁体形成网（18,18'，62）。 当需要时，每个纤维网的磁体（23,23'，64）被封装在保护材料覆盖物（例如19,19'）内，以便将它们与给定的浴（26,26'）物理隔离，其中 将使用过滤网（10,40,52,60）。 虽然过滤网适于通常浮在给定浴槽的表面上，但通过件部件（33,33'，53）开始将过滤网浸入浴中，优选地使用零件承载篮（36,36） '，51），在后者的向下和随后的向上位移期间，浴溶液被有效地强制通过过滤网。 由于这种相互移位的结果，浴中的任何松散的金属碎屑（38）被磁性地抽吸在过滤网上的磁体限定位置，并且可以容易地从其周期性地移除，例如用简单的喷水（39）。

公开(公告)号：US4298856A

公开(公告)日：1981-11-03

申请号：US72371

申请日：1979-09-04

申请人： Donald W. Schuchardt

发明人： Donald W. Schuchardt

IPC分类号： H01C17/23 ,  H05K1/00 ,  H05K1/02 ,  H05K1/16 ,  H05K3/22 ,  H01C10/00

CPC分类号： H05K1/167 ,  H01C17/23 ,  H05K1/0268 ,  H05K1/0293 ,  H05K2201/0305 ,  H05K2201/09263 ,  H05K2201/10287 ,  H05K2203/171 ,  H05K2203/175 ,  H05K3/222 ,  Y10T29/49099

摘要： Several planar configured, metallized resistor embodiments (25, 35, 45, 55, 65) are disclosed, as are several methods of manufacturing and resistance trimming the same, particularly to values of resistance lower than the "as fabricated" nominal value thereof. In accordance with one preferred resistor embodiment (25), a plurality of associated discrete conductive bonding pads (29) are formed on a common supporting substrate (27), with each pad being in conductive contact with a different spaced site along the body portion (25a) of the resistor between the terminating ends thereof. The bonding pads (29) are advantageously adapted to allow bonded wire connections to be made between different selected pairs thereof, after fabrication of the resistor, whenever necessary to incrementally reduce the initial nominal value of resistance of the resistor to a lower desired value.In accordance with several other resistor embodiments (35, 55, 65), the bonding pads (41 and 42, 59, 72) thereof are arranged in clusters so as to allow the use of solder bridges, as well as bonded wires, to interconnect selected ones of adjacent pairs of the pads as required to establish a desired lower value of resistance.Also in accordance with the principles of the invention, one illustrative resistor (45) incorporates a plurality of short-circuiting shunts (52), in addition to a plurality of bonding pads (47). The shunts are interconnected to the body portion (45a) of the resistor at different spaced sites therealong such that when selectively opened, the then existing value of resistance of the resistor is incrementally increased, whereas when short-circuit connections are selectively established between different pairs of the bonding pads (47), the then existing resistance of the resistor is incrementally decreased.

摘要翻译： 公开了几种平面配置的金属化电阻器实施例（25,35,45,55,65），制造和电阻修整的几种方法，特别是低于“制造”标称值的电阻值。 根据一个优选的电阻器实施例（25），在公共支撑衬底（27）上形成多个相关联的分立导电接合焊盘（29），其中每个焊盘与沿着主体部分的不同间隔的位置导电接触（ 25a）之间的电阻器。 接合焊盘（29）有利地适于在制造电阻器之后，在必要时允许在电阻器的电阻的初始标称值降低到较低期望值之间，在不同的选定对之间进行接合线连接。 根据几个其它电阻器实施例（35,55,65），其焊盘（41和42,59,72）被布置成簇，以便允许使用焊接桥以及接合线来互连 根据需要选择相邻的焊盘对，以建立期望的较低的电阻值。 根据本发明的原理，除了多个接合焊盘（47）之外，一个说明性电阻器（45）还包括多个短路分流器（52）。 分流器与电阻器的主体部分（45a）互连到不同的间隔位置，使得当选择性地打开时，电阻器的电阻的当时现在值增加地增加，而当在不同对之间选择性地建立短路连接 的焊盘（47），电阻器的现有电阻逐渐减小。