Abstract: Most prior-art switch inserts for rotary switches of a type including wiped segments and a switch wiper have a tall construction, and are unsuitable for carrying high current loads. In a switch insert of this invention, wiped segments (5) are arranged inside a plastic plate (8) so that they can be contacted from another side by a further switch wiper (9) having contacts (10) arranged in a mirror image of contacts (11) of a first switch wiper (7), with the further switch wiper (9) having positioning lugs (12) that extend through control recesses (13) of the first switch wiper (7) to accept a leaf spring (15) in a locking slot (14) thereof on the other side. The leaf spring supports itself by resiliently bracing on a surface of the first switch wiper (7) facing away from the contacts (11), and thereby loads the contacts (10, 11) of both switch wipers (7, 9) against the wiped segments (5). Generally switch inserts structured according to this invention provide an extremely flat construction.

Abstract: A rotary electrical switch for panel mounting in a motor vehicle for control of a blower motor of a heating, ventilating and/or air conditioning installation, includes a set of conductive contact strips. These comprise coplanar primary strips and a secondary strip for power supply. The switch has a body mounted for rotation about an axis at right angles to the plane of the coplanar contact strips. The body supports a radial ring member which is bent back into two half rings with conductive radial projecting portions connected together electrically. Each projecting portion carries at its end an arm having two contact pads for making contact with the primary contact strips in two parallel planes. The projecting portions have at least one third pad for making a further contact with the secondary contact strip in one of the two planes.

Abstract: A rotation detecting device which issues a plurality of code signals by a simple configuration so as to detect the rotational angle position and the direction of rotation of a rotor according to the code signals. The rotation detecting device has a knob member which is rotatably attached to a part of an enclosure, a plurality of projections which are formed on the periphery of one end of the knob member, and two detection switches which selectively engage with the projections to turn ON/OFF and issue signals. These detection switches are disposed on a printed circuit board in such a manner that they turn ON/OFF at different timings as the knob member rotates. Thus, the rotational position and the direction of rotation of the knob member are detected by the combinations of the ON/OFF signals of the detection switches.

Abstract: A switching component for a metal-clad station provides the equivalent of three three-phase section switches respectively disposed on two outlets powering sets of three-phase busbars and allowing grounding of the section switches upstream therefrom. The section-switching and grounding are performed by first contact parts engagable with second contact parts electrically connected together and to ground, and third contact parts. The second contact parts and the third contact parts are carried by a common shaft rotatable about the shaft axis.

Abstract: An electric switch having a disc which is rotatable to any of several indexed positions, the disc having two generally semicircular conductive sectors rigidly attached to the disc and electrically insulated from each other; a plurality of stationary terminals, one of which is in continuous sliding contact with one of the sectors, one of which is in continuous sliding contact with the other sector, and the remaining terminals are in discontinuous sliding contact with one or the other of the sectors; the sectors being shaped to eliminate electrical contact with selected terminals at selected indexed positions of the disc.

Abstract: A bridge-contact assembly used in combination with an inner contact ring and a contact terminal of an array concentrically surrounding the ring comprises a contact hoousing rotatable concentrically with and between the ring and array, a pair of bridge-contact jaws extending between the ring and the array and having inner ends gripping the ring and outer ends gripping a one of the terminals of the array, and a contact holder spacedly surrounding the pair of jaws and spacedly surrounded by the contact housing. At least one jaw spring supports the jaws in the holder and urges the jaws together and at least one holder spring supports the holder in the contact housing.

Abstract: An electric switch having a disc which is rotatable to any of several indexed positions, the disc having two generally semicircular conductive sectors rigidly attached to the disc and electrically insulated from each other; a plurality of stationary terminals, one of which is in continuous sliding contact with one of the sectors, one of which is in continuous sliding contact with the other sector, and the remaining terminals are in discontinuous sliding contact with one or the other of the sectors; the sectors being shaped to eliminate electrical contact with selected terminals at selected indexed positions of the disc.

Abstract: A step selector for a stepped transformer has an electrically insulating cylindrical wall provided with fixed contacts, e.g. at different levels and, for each contact level, a radial arm composed wholly of electrically insulating material is affixed to a cylindrical shaft rotatable about the axis of the cylinder and within the latter. The radial arm has a flange lying against the shaft and extending over substantially 120.degree. of an arc thereof. An inward projection on the flange engages a recess in the shaft and the flange is held against the shaft by at least one band of fibrous material impregnated with a self-hardening synthetic resin. The outer end of the arm carries a contact bridge slidable on a contact ring which nonrotatably surrounds the shaft and lies in the plane of the respective fixed contact which is engageable by the bridge.

Abstract: A rotary, snap-action electrical switch suitable for immersion in the liquid dielectric of an electrical transformer. The switch includes a multi-position operating mechanism which latches each switch position while preventing contact rebound, absorbing all closing forces in the mechanism itself. A switch position indicator follows the movable contact, and not the actuating handle. A three-position embodiment of the switch rotates one end of a pivotable contact on a stationary contact, removing contact bias means from the current path. The remaining end is selectively engageable with either of two additional stationary contacts, as well as having a non-contact open circuit position. The pivotable contact is driven at a point intermediate its ends, to increase the torque arm and thus obtain the desired operating force with substantially reduced forces between the driving member and the contact carrier.

Abstract: A low voltage tap changer including a dielectric base fabricated from flat insulating sheet, a number of control decks mounted on the base, each deck including a corresponding number of cylindrical contacts, a continuous insulating shaft extending through each of the decks and being mounted for rotary motion with respect thereto, a number of pairs of curved contacts formed from flat copper sheet, mounted on the shaft and being positioned to engage the contacts, each of the pairs being self-aligning and biased to operatively engage the contacts and a Geneva drive assembly for rotating the shaft in a step-by-step manner and for locking the shaft in each position.

Abstract: A circuit breaker with an arc shield characterized by a movable contact assembly which is rotatable between open and closed positions with respect to stationary contacts, and a cylindrical arc shield mounted on the assembly and rotatable therewith.

Abstract: A rotary selector switch comprises a generally flat blade mounted for rotation in its own plane about an axis passing through it into and out of contact with one or more of several spaced terminal contacts.

Abstract: A DIP rotary switch comprising a housing within which rotatable members such as a rotor and a disc are disposed around a pivot protruding from the center of a molded base which horizontally sandwiches a one piece plate terminal manufactured by a punching process. A contact segment of the plate terminal is bent first upward along a step of a hollow disposed at the surface edge of the base and then pressed down to be located along the slot arranged at the surface thereof, while a lead foot is bent downward to a right angle by touching on a step of a hollow arranged at the under surface of the base.

Abstract: A helical rotary switch having a helical coil formed of an insulating band like plate, a plurality of contact segments attached to said helical coil, a shaft for said helical coil rotatably supported by a pair of panels, a supporting member supported by said panels and supporting said helical coil between said pair of panels, and a sliding member with contact members engageable with said helical coil and said contact segments. The sliding member is mounted on said shaft such that when the shaft is rotated, said contact members of said sliding member successively contact the plurality of contact segments attached to said helical coil.