公开(公告)号：US3628782A

公开(公告)日：1971-12-21

申请号：US3628782D

申请日：1969-12-01

Applicant: CONTROLS CO OF AMERICA

Inventor： KOTHE ERICH

IPC: H01H35/26 ,  F16F1/18

CPC classification number: H01H35/2607

Abstract: The force or degree of compression of the spring is adjusted by rocking the lever about its axis A-B by means of the manually operated cam acting on the lever at D. Calibration is effected by adjusting the screw at B to rock the lever about axis A-D. Any tool forces applied to the adjusting screw during adjustment cannot be transmitted to the spring to adversely affect calibration.

公开(公告)号：US3600536A

公开(公告)日：1971-08-17

申请号：US3600536D

申请日：1969-12-22

Applicant: CONTROLS CO OF AMERICA

Inventor： KOTHE ERICH

IPC: H01H35/26

CPC classification number: H01H35/2607

Abstract: The force or degree of compression of the spring is adjusted by rocking the lever about its axis A-B by means of the manually operated cam acting on the lever at D. Calibration for the lowto-high range is effected by adjusting the screw at B to rock the lever about axis A-D. For ''''extra low'''' settings, the cam is turned so the tab at D can, in effect be unlimited on its rise and the calibration is then effected by adjusting the limit screw acting on tab E. Any tool forces applied to either adjusting screw during calibration cannot be transmitted to the spring to adversely effect calibration.

公开(公告)号：US3598946A

公开(公告)日：1971-08-10

申请号：US3598946D

申请日：1969-12-24

Applicant: CONTROLS CO OF AMERICA

Inventor： HANSSEN TORE B ,  KOTHE ERICH

IPC: H01H35/26 ,  H01H35/34

CPC classification number: H01H35/2614

Abstract: In normal operation, the rising diaphragm raises the actuator and spring seat against the force of the reset spring. Just before reaching the trip point of the switch in one form, the seat engages the strip spring eyelet so the pressure is opposed by both springs, the force of the trip spring- and, hence, the operating pressure of the switch- being determined by the position of the plunger. As the pressure decreases under the diaphragm, the eyelet bottoms in the well before reset so the reset force on the diaphragm is determined by the reset spring only. At extra low level settings the plunger is allowed to rise until the spring lifter is picked up by the plunger- to cancel out the force of the trip spring- and lifted a little by the reset spring so the seat cannot engage the eyelet before the trip point. Therefore, at this setting the diaphragm is opposed only by the reset spring. The second modification differs in that the reset spring is affected by the trip spring adjustment.