公开(公告)号：DE2508827A1

公开(公告)日：1976-09-09

申请号：DE2508827

申请日：1975-02-27

Applicant: STANDEX INT CORP

Inventor： PATTI VINCENT J

IPC: H01G5/14 ,  H01G5/16

公开(公告)号：DE2505882A1

公开(公告)日：1975-08-14

申请号：DE2505882

申请日：1975-02-10

Applicant: STANDEX INT CORP

Inventor： PATTI VINCENT J

IPC: H01G5/16 ,  H01G5/00 ,  H01G5/04

Abstract: A compression trimmer for providing a range of capacitance values for an electrical circuit includes a plurality of capacitive plates spaced by one or more dielectric members and mounted on a substantially compliant, high temperature, molded plastic insulating base. The compression trimmer includes an elongated screw received within and threadedly engaging an elongated torque control hole of the compliant base. The length and diameter of the torque control hole may be ajdusted to provide a desired torque rating of the screw. Additionally, the improved interference fit between the screw and the compliant base reduces or eliminates screw vibration to thereby maintain the capacitance value of the trimmer constant. A plurality of conductive terminals extending through the compliant base are provided for connecting the trimmer in an electrical circuit, for example, by the soldering of the conductive terminals to a printed circuit board. The trimmer includes various protective features that reduce the possibility of damage or destruction of the trimmer resulting from the receipt of solder flux or solder within the base of the trimmer. These productive features include the maintenance of very close tolerances between the compliant base and the conductive terminals. Additionally, a plurality of hollowed-out portions or wells are formed in the compliant base immediately adjacent the conductive terminals for receiving and providing a cooling space for the solder flux and the solder that does enter the base 24 to thereby prevent the solder flux and the solder from damaging the capacitive plate structure of the trimmer.