摘要:
A multi-point switching apparatus includes a continuous common pattern formed on a contact circuit board, equally spaced to-be-switched patterns, and a slider that is brought into sliding contact with both the common pattern and one to-be-switched pattern. The slider is moved to make a switchover in succession. The slider includes a first sliding part and second sliding part that are elastically deformable individually. Each to-be-switched pattern includes a first pattern part placed so as to be brought into sliding contact with the first sliding part and a second pattern part placed so as to be brought into sliding contact with the second sliding part. The first pattern part and second pattern part are electrically connected to each other for each of the to-be-switched patterns. While any of the first sliding part and second sliding part is in a space, the other is in sliding contact with the to-be-switched pattern.
摘要:
A resistive element structure for a sender assembly of a gauge is provided. The resistive element structure comprises a first and second resistive element. A first set of contact elements are distributed along a first arc about a pivot point. Each contact element of the first set is electrically connected to the first resistive element. A second set of contact elements is distributed along a second arc about the pivot point. Each contact element of the second set is electrically connected to the second resistive element.
摘要:
A compact configuration of resistive elements, plural circularly-arranged fixed contacts upon, or mountable upon, a printed circuit board (PCB), to comprise a rotary variable resistor.In one embodiment, fixed contacts are disposed upon one side of a PCB, in which through-conductors connect to a resistor pattern upon a separate ceramic substrate.In another embodiment, fixed contacts occupy the central area, and resistors and interconnecting conductors surround the same; all on one side of a ceramic substrate.Mutually insulated spring wipers connect to the fixed contacts to allow rotary variation of resistance.
摘要:
An annular resistor, suitable for use in a diesel electric locomotive dynamic braking system and the like, having a supporting frame including spaced inner and outer annular frame portions and a continuous resistance ribbon having a plurality of bent-back radial extensions therebetween and in electrical isolation therefrom. U-shaped folds of the ribbon are mounted on pin supports allowing contraction and expansion of the ribbon. The pin supports are mounted to insulator blocks which may be selectively positioned on the frame, when two or more are stacked, to vary ribbon alignment and hence convective cooling. The resistor is comprised of severally replaceable identical component quadrants.
摘要:
A variable resistance element is provided in which a multicontact brush is slidable over a plurality of spaced tap terminals of a resistance element. The resistance element includes a resistance film deposited on a suitable backing and a deposited conductive film in spaced strip form forming extending tap terminals for the resistance film. The brush contacts are aligned transversely to the path of travel of the brush while the tap terminals are angularly disposed relative to the path of brush travel so that at least two tap terminals are engaged by the brush contacts as the contact brush is moved relative to the tap terminals.