CONTACT SYSTEM FOR STEPPING VOLTAGE REGULATOR SELECTORS FOR ADJUSTABLE TRANSFORMERS

The contact system is used in electrical engineering. Itallows relatively large deviations in the interpositioning of thefixed contacts of the selector and the contact disc at the samecontact pressure of the two groups of contact lamellas, regardlessof the size of the deviation of the interposition. The contactsystem consists of two groups of contact lamellas fitted in amirror position and engaged by frames by means of springs. One ofthe end of the contact lamellas engages a centrally positionedcontact rings, and the other end - a fixed contact of theselector. A lever is fitted between the two groups of contactlamellas having spacer surfaces for the contact lamellas, thelever end of which is closer to the contact end of the lever ispivotly connected by a axle to the supporting body, and the otherend is machined as a lateral guide having profile surfacesengaging the contact surface of the fixed contact or guidingsurfaces on the front of the fixed contact. Bilaterally the leverrests, by means of springs, on the supporting body. In onealternative the lever rests in grooves in the supporting body bymeans of axles and springs between them, and the lever end whichis closer to the ring ends by surfaces engaging the ring. Inanother alternative each frame has a support by means of which itrest in a groove in the middle of the respective lamella of one ofthe two middle contact lamellas.5 claims, 11 figures