Without a spring, the lock would never unlock. Therefore, a lock of a door required a spring.
A valve spring "keeper" or AKA a valve spring "retainer" is used to lock a valve spring to the valve.
To take the lock plate off requires a lock plate spring compressor. With the spring compressor in place and the spring slightly compressed remove the circlip that holds the lock plate on. Then release the spring compressor and the lock plate simply slides off.
The Spring Lock - 1912 was released on: USA: 7 September 1912
This spring broke inside the driver's door keyless entry pad door lock on my 2001 Ford Explorer Sport. Where do you connect this spring on the door lock?
You enter the correct combination for the lock then move the catch and the lock will spring open.
That is correct if the spring is upside down it will not lock back. The big end of the spring goes toward the cap.
Use a spring compressor to push the lock plate down slightly, then remove the circlip that keeps the plate on. Release the spring compressor and the lock plate will come off. Reverse the procedure to reinstall.
Push the spring and pull the cylinder out
The lock on a muzzle loader consisted of sear, hammer and hammer spring. With some modern guns (a Winchester 94) the hammer/ hammer spring would be a close match. For a striker fired weapon (no outside hammer) it might be the firing pin and spring.
To reassemble a door lock, start by ensuring that all components, including the cylinder, spring, and key, are clean and in good condition. Insert the cylinder into the lock body, aligning it with the mounting holes. Next, place the spring in its designated slot and secure any retaining clips or screws to hold the cylinder in place. Finally, test the lock with the key to ensure it operates smoothly before attaching the lock to the door.
The lock on a muzzle loader consisted of sear, hammer and hammer spring. With some modern guns (a Winchester 94) the hammer/ hammer spring would be a close match. For a striker fired weapon (no outside hammer) it might be the firing pin and spring.