Standard safety features on a kitchen gas stove include safety valves and electric ignitions. The valves carefully regulate the amount of gas released by the stove and the electric ignition system ensures that gas is only needed for the final steps of the lighting process.
Safety valves regulate the flow of gas through the stove with use of the range's thermostat controls. These controls allow the user to regulates the stove's flame output. When the control is turned on, the pilot heats. Once it reaches the desired temperature, the stove's sensor automatically opens the safety valve just enough to allow the proper amount of gas to flow through. When the burner is turned off, the safety valve seals, preventing any other gas from coming through the stove.
Electric igniters are important because they reduce the overall amount of gas used in the stove. Without these, gas stoves have to maintain a gas flame that is always lit. Electric current builds up in the igniter and signals the safety valve to open. Then the electrically-heated igniter is able to light the gas burner. Gas is only needed in the final step of the ignition process, which makes for safer stove operation.