setscrew
A spring balance is a device used to measure the weight of an object by the tension force exerted on a spring when an object is suspended from it. It typically consists of a spring connected to a hook or mechanism from which objects can be hung to measure their weight in units such as grams or Newtons.
A pacemaker is a device that is commonly used to regulate an irregular heartbeat by sending electrical impulses to the heart to help it maintain a normal rhythm.
A spring-scale.
A clock spring is used to regulate the movement and control accuracy. It is precisely crafted to a tight tolerances.
Most likely there is a spring loaded device called a belt tensioner. There is a pulley on it with a bolt or square inset in it. sometime a socket or 3/8" drive extention can be used to move the pulley and release the tension on the belt.
conflict
A homograph for "spring" is a coiled metal device used to store mechanical energy or to suspend something.
A spring tension rod is used to create tension between two surfaces, such as walls or a window frame, without the need for drilling or permanent installation. It can be effectively used in home organization to hang curtains, create temporary shelving, or divide spaces.
A pacemaker
You have left out a word in your question. What I suspect you meant to ask is "What literary device is used to ease some of the dramatic tension that has been established." If that is what you are asking, the answer is comic relief.
A spring balance is a weighing device that utilizes the relation between the applied load and the deformation of a spring. It is widely used commercially.
A spring-loaded tensioner is a mechanical device used to maintain tension in a belt or chain system, typically found in engines or machines. It consists of a pulley mounted on a pivot, with a spring that applies force to keep the belt taut. As the belt stretches or the components shift, the tensioner moves to adjust the tension accordingly, ensuring optimal performance and preventing slippage. This automatic adjustment helps extend the lifespan of the belt and related components.