An electronic device is provided that includes an electronic component within the electronic device, a kill switch; an access door providing access to the electronic component and the kill switch and a latch for securing access to the electronic component in a closed position and for giving access to the electronic component in an open position. The latch activates the kill switch in the open position, independently of a position of the access door.

A limit switch is provided that is returned to an original position even if a turning angle of a turning lever becomes 90 degrees. In a section perpendicular to a turning shaft, a cam is formed such that a whole contact surface of the cam with a cam receiver is located on a side of the cam receiver with respect to a shaft center of the turning shaft when the external force does not act on the turning lever.

A flow switch assembly features a two-part base assembly having lower and upper base parts. The lower base part is made from a metallic material, adapted on piping having a fluid flow, and configured with a central orifice to receive a paddle arm that pivots on an axis and responds to fluid flow in the piping. The upper base part is made from a non-metallic material, configured with a corresponding central orifice to receive the paddle arm, and configured with a channel to receive a pivot arm to mount and allow the paddle arm to pivot on the axis to actuate an ON/OFF switch in response to fluid flow. The non-metallic material has a lower coefficient of heat transfer than the metallic material to reduce condensation build-up in the flow switch assembly when the flow switch assembly is used in cold applications and exposed to temperatures below freezing.

A switch has a rotary shaft that rotates in response to an external force, a cam provided on the rotary shaft and including a cam action section, wherein the cam rotates in response to the rotation of the rotary shaft, a displacement member including a cam support section that contacts the cam action section, wherein the displacement member is displaced in response to the cam support section being pressed by the cam action section rotating, and a switch module that performs an on-off action in response to the displacement of the displacement member. The cam action section is made of a metal. The cam support section is made of a resin softer than the cam action section.