Abstract: A snap-action device, for use in electrical switches, which includes at least one toothed wheel, a switch having a base with a shoulder guide and a cylindrical wall for supporting the toothed wheel, with an inclined portion at opposite ends thereof, at least one spring, and a pawl having a pawl base and side walls with at least one surface inclined along the pawl base. The pawl is slidably attached to the shoulder guide and connected to the switch by snapping steps on the pawl onto corresponding counter-steps on the switch to prevent accidental separation of the pawl from the switch. At least one tang is arranged with the surface of the side walls and the portions of the cylindrical wall to define a cavity wherein the spring is inserted and pre-loaded.

Abstract: An electrical operating device, particularly a change-over or other switch or the like, including a contact-holding slider having a body provided with usual recesses which open into two opposing faces (A, B) of the body, and contain usual contact elements (40) which move against elastic springs (26, 26A) to cooperate with usual fixed contacts rigid with the body of the operating device, the body of the slider comprising at least two parts (2, 3) fitted together by connection devices (4, 4', 5, 5', 6, 6', 7, 7').

Abstract: A fuse-holder comprising a body in which at least one seat is provided for receiving at least one fuse and to act as a guide and support for closure plugs which make contact with one end of the fuses. The fuse-holder is connected to at least one second electrical unit and has contact devices arranged to cooperate at one end with the plugs and at their other end with at least one further electrical connection member. The fuse-holder also includes apertures to be penetrated by flat pins of the second electrical unit for contact with the base of the fuses.

Abstract: A tappet, in particular for cooperating with camshafts in electrical changeover switches, circuit breakers or the like, comprises a body provided with a cavity opening into two opposing faces of the body and containing, mobile against a spring, a generally flat contact element the opposing free ends of which project from the cavity and from the body so as to cooperate with fixed contacts generally arranged to the sides of the body and rigid with the casing of the changeover switch or the like. The movable contact is subjected to the action of an element or slider movable within the cavity and arranged to cooperate with the cams of a camshaft.

Abstract: A modular camshaft comprises at least two modular elements or modules removably coupled together; each module carries at least one cam and comprises two cylindrical elements disposed on the same axis and projecting in opposite directions from opposing faces of said cam, a first cylindrical element acting as a hub and the second being hollow and acting as a seat, the seat of one modular element being arranged to receive the hub of the other module so as to define the camshaft, on each hub there being provided means which cooperate with counter-means provided in each seat to torsionally lock said two modular elements together.