Twoposition

Twoposition, often written as two-position, is a term used to describe a device, mechanism, or control that has exactly two discrete, stable positions. It denotes binary-state operation and is applied across several engineering disciplines, including electronics, hydraulics, and mechanical design.

In electrical and electronic contexts, two-position switches provide a binary circuit state. Common forms include toggle switches, slide switches, and pushbuttons that latch in one of two positions. These switches can be configured as single-pole single-throw (SPST) or single-pole double-throw (SPDT) to select between two circuit paths or outputs. The two positions represent distinct electrical states such as on/off, connect/disconnect, or enablement versus disablement.

In pneumatic and hydraulic systems, two-position valves or actuators switch between two states to control flow or movement. Examples include 2-way valves that direct air or fluid to extend or retract a cylinder, or redirect flow between different ports. These devices are chosen when a simple, reliable binary control is sufficient.

In mechanical design and user interfaces, twoposition mechanisms provide straightforward control with two stable settings. In software and human–machine interfaces, two-position toggles serve as familiar binary controls for enabling or disabling features, switching modes, or selecting options.

Etymology and usage notes: the term is generic and can be hyphenated as two-position or written as twoposition in some contexts. It functions as a descriptive label rather than a formal standardized term, applied wherever a binary, two-state control is required.