A keypad overlay membrane provides guidance to a user in selecting an intended key to strike and avoiding striking unintended keys. In one arrangement the overlay membrane is formed by a continuous thin-walled sheet having an outwardly-facing surface and an opposed inwardly-facing surface. Formed into the thin-walled sheet are a first array of raised members and a second array of channels. The raised member array is laid out in a configuration for positioning atop individual keys of the electron...

A multidirectional input device is provided. A multidirectional input device includes a keytop capable of moving up and down through pressing. A membrane switch that has a plurality of switch elements and is arranged on the side that faces the reverse side of said key top. A plurality of domed switch operating assembly arranged above said plurality of switch elements are capable of switching on said switching elements. The plurality of switch operating assemblies are connected with strip-shaped ...

A metallic keypad panel assembly having a ripple luster includes a thin plate, a displaying layer, an elastic layer, an adhesive layer, a metallic keypad panel, an electroplated layer and a pattern layer. One side surface of the thin plate is printed with a film to form a displaying layer. The elastic layer is adhered on one side surface of the displaying layer and has a carrier thereon. One side surface of the carrier is provided thereon with a plurality of protrusions. The metallic keypad pane...

Key structures are provided. A key structure comprises a key cap, a substrate, a resilient unit, a first rod and a second rod. The first and second rods connect the substrate and the key cap. When the resilient unit is in a first position, the resilient unit abuts the first rod and exerts a lateral pre-tension force on the first rod, to hold the key cap at a first height with respect to the substrate, such that the key structure is in a normal state. When the resilient unit moves to a second pos...

A thin keyboard structure comprises a substrate, a flexible circuit and a keycap. The substrate comprises a base, a first portion with a first end, and a second portion with a second end. At least one of the first portion and the second portion protrudes from the base at an included angle. The first end is aligned with the second end and separated from the second end by some distance. The flexible circuit comprises a first contact fixed on the first end and a second contact fixed on the second e...

An exterior operating handle is mounted on the wall of the enclosure of an enclosed-type circuit breaker and is drivingly connected to the operating handle of the circuit breaker. The cover is normally latched in closed position by a manually operable latch. Interlock means normally interlock the exterior handle, cover, and enclosure wall in a manner such that (a) when the cover is latched closed, the exterior handle can be operated to open and close the circuit breaker contacts, selectively; (b...

For initiating operating movement to an electric switch disposed in a housing having an access door, a movable element is interconnected with the switch and operating movement is imparted thereto by motivating means, and interlocking means is mounted on the housing and arranged to prevent switch closing movement of the motivating means so long as the access door of the housing is open.

An electric switch mounted within an enclosure having a hinged cover is manually operated from outside the enclosure by a handle mechanism secured to the enclosure. The cover is provided with a single aperture near the edge thereof remote from the cover hinges, with this aperture providing clearance for the operating handle and housing of the mechanism when the cover is closed and also providing clearance for a catch which holds the cover closed. A defeatable cover interlock prevents opening of ...

A switch device characterized by a switch structure within an enclosure having an openable cover and having interlock means between the switch structure and a handle on the cover for preventing opening of the cover if the contacts of the switch structure are welded in the closed-circuit position.

A drawout circuit interrupter comprising a multipole circuit breaker movable between connected and disconnected positions of incoming and outgoing terminals with corresponding conductor terminals on spaced bus bars, at least one threaded bolt on the circuit breaker engageable with an aperture of a supporting frame, and the bolt having means for holding the bolt in alignment with the aperture as the circuit breaker moves into the connected position.