How the Classic Operation Board Game Works

A 1967 patent for an electronic game where a player uses a conductive probe to navigate a path without touching the sides, triggering a signal if they fail.

What it covers

The patent describes a game board featuring two parallel, electrically conductive plates separated by a gap. A path for the player is created by a series of openings in the top plate. The player uses a specialized probe—an elongated member with a spring-loaded conductive rod—to navigate these openings. If the rod touches both the top and bottom plates simultaneously, it completes an electrical circuit, which triggers an indicating signal device, such as a light or buzzer.

What it doesn't cover

• —Does not cover non-electrical games that rely purely on mechanical dexterity.
• —Does not cover games that use wireless sensors or cameras to track movement.
• —Does not cover games where the signal is triggered by something other than a direct electrical short between two plates.
• —Does not cover games that do not use a spring-loaded probe mechanism.

The clever bit

The invention uses a simple spring-loaded probe to ensure that the circuit only closes when the player makes a mistake, turning a basic electrical short into a core game mechanic.

Why it matters

This patent is the technical foundation for the iconic Operation board game, first released in 1965. It established the 'electromechanical skill game' genre, where physical precision is rewarded or penalized by simple electronic feedback. It remains a classic example of how basic circuit design can create high-stakes, engaging play.

Real-world examples

• 1.The Operation board game