8results about "Contact fixed to operating part" patented technology

The embodiment of the invention relates to a switching device for an electrical system. A low voltage switchgear comprising a switching device having one or more switching poles, each switching pole comprising: a first terminal and a second terminal coupleable with a corresponding wire conductor of an electrical wire; a fixed contact assembly including a plurality of fixed electrical contacts electrically connected to the first terminal and including one or more first fixed contacts and one or more second fixed contacts electrically insulated from the first fixed contacts; and a movable contact assembly including a plurality of movable electrical contacts electrically connected to the second terminal and including one or more first movable contacts and one or more second movable contacts. For each switching pole of the switching device, the switching apparatus includes a current limiter electrically connected in series with the second fixed contact and the first terminal of the switching pole. The current limiter is configured to limit or cut off the current during a turn-off manipulation of the switching device.

An input device is provided with which the total number of changes in the electrical state of fixed electrodes when an operation section moves between click points can be more freely set. The input device (2) is provided with two fixed electrodes (29a, 29b) and an operation section (20). The two fixed electrodes (29a, 29b) are arranged to overlap a prescribed wiring electrode (Y1) among a plurality of wiring electrodes (Y1). The operation section (20) is movable relative to the two fixed electrodes (29a, 29b). The operation section (20) is movable within a movable range including a plurality of click points. The electrical states (Q1, Q2) of the two fixed electrodes (29a, 29b) change between a plurality of states in response to movement of the operation section 20. When the operation section (20) moves between a pair of adjacent click points among the plurality of click points, the total number of changes in the electrical states (Q1, Q2) of the two fixed electrodes (29a, 29b) is an integer N. The integer N is a number that is not a factor of 4.

A low-voltage switching apparatus is disclosed which comprises a switching device having one or more switch poles. Each switch pole comprises first and second pole terminals that can be coupled with corresponding line conductors of an electric line; a fixed contact assembly is connected to the first pole terminal and includes first fixed contacts and second fixed contacts electrically insulated from the first fixed contacts; and a movable contact assembly connected to the second pole terminal and including first movable contacts and second movable contacts. The switching apparatus comprises, for each switch pole, a current limiter connected with the second fixed contacts and the first pole terminal of the switch pole. Each current limiter is configured to limit a current flowing along a series circuit including at least the second fixed contacts, the current limiter and the first pole terminal, during an opening maneuver of the switching device.

A dome switch comprising a resiliently compressible keycap; an electrically conductive element enclosed by the resiliently compressible keycap; and a switch circuit located under the resiliently compressible keycap and the electrically conductive element, the switch circuit comprising a first circuit board trace and a second circuit board trace, wherein the first circuit board trace and the second circuit board trace are electrically separated; wherein: the first circuit board trace comprises a central portion and a plurality of first projections extending from the central portion to form a non-convex shape; the second circuit board trace comprises a surrounding portion and a plurality of second projections extending from the surrounding portion to form a non-convex shape; wherein the second circuit board trace is arranged to enclose a majority part of the first circuit board trace and the first projections and the second projections are arranged to be positioned in an alternating manner; and wherein the dome switch is configured such that upon being depressed, the resiliently compressible keycap is operable to enable an electrical contact between the electrically conductive element and at least part of the first circuit board trace and at least part of the second circuit board trace so as to temporarily complete the switch circuit.

A low-voltage switching apparatus comprising a switching device having one or more switch poles, each comprising: - a first pole terminal and a second pole terminal that can be coupled with corresponding line conductors of an electric line; - a fixed contact assembly comprising a plurality of fixed electric contacts electrically connected to said first pole terminal and including one or more first fixed contacts and one or more second fixed contacts electrically insulated from said first fixed contacts; - a movable contact assembly comprising a plurality of movable electric contacts electrically connected to said second pole terminal and including one or more first movable contacts and one or more second movable contacts. The switching apparatus comprises, for each switch pole of said switching device, a current limiter electrically connected in series with the second fixed contacts and the first pole terminal of said switch pole. Each current limiter is configured to limit or break a current flowing along a series circuit including at least said second fixed contacts, said current limiter and said first pole terminal, during an opening manoeuvre of said switching device, when the first movable electric contacts of said movable contact assembly decouple from the first fixed contacts of said fixed contact assembly.

A progressively contacting switch includes a set of contacts connected to an input. The set includes a first sacrificial contact formed of a first metal and a first conducting contact formed of a second metal. The switch further includes a movable set of contacts connected to an output. The movable set includes a second sacrificial contact formed of the first metal and a second conducting contact formed of the second metal. The switch includes an element configurable to connect the movable set of contacts such that the first sacrificial contact connects to the second sacrificial contact at a first time, thereby causing a current to flow from the input to the output, and while the first sacrificial contact remains connected to the second sacrificial contact, the first conducting contact connects with the second conducting contact at a later time.

An electromagnetic relay suppresses retriggering of an arc generated at contacts. The electromagnetic relay has a housing, a first fixed terminal, a second fixed terminal, a movable contact piece, a first magnet, a gas flow path, and a partition member. The housing includes a housing space and a side wall that covers the housing space from a first direction. The housing space includes a first space and a second space. The first fixed terminal includes a first fixed contact disposed in the first space. The second fixed terminal includes a second fixed contact disposed in the second space. The movable contact piece includes a first movable contact and a second movable contact. The first magnet elongates a first arc generated between the first fixed contact and the first movable contact in the first direction. The gas flow path is disposed between the side wall and the movable contact piece. The gas flow path includes a flow inlet that communicates with the first space and a flow outlet that communicates with the second space. The partition member is disposed between the movable contact piece and the gas flow path and partitions the first space and the second space from the gas flow path.

A contactor includes a housing having a wall defining a cavity and a cover closing the cavity. The contactor includes a first fixed contact and a second fixed contact received in the cavity. The contactor includes a movable contact movable within the cavity between a mated position and an unmated position. The movable contact engages the first and second fixed contacts to electrically connect the first fixed contact and the second fixed contact in the mated position. The contactor includes a coil assembly in the cavity operated to move the movable contact between the unmated position and the mating position. The contactor includes a thermal absorber thermally coupled to the first fixed contact to reduce an operating temperature of the first fixed contact. The thermal absorber includes a phase change material element configured to absorb heat from the first fixed contact.