The design uses a spring-loaded arm that rotates a cylindrical bar in the tailpiece, varying the string tension to create vibrato and other pitch variations.

The Night Creeper's spring-loaded arms could be raised up, then released, causing them to spring down in a chopping motion.

The invention, an arm-wrestling training machine, consists primarily of a spring-loaded vertical arm that a prospective wrestler tries to force into a horizontal position.

The dog is a spring-loaded arm pivoted on the outside of the lock plate.

Metro-North officials said the pantograph, the spring-loaded arm on top of the train, became tangled in the web of wires carrying 11,000 volts overhead.

The lander had cameras to take pictures of the ground and spring-loaded arms to measure the compressibility of the soil.

The lever could be operated to cause the spring-loaded arm to move back and forth across the windshield.

It is driven in a circular motion by a spring-loaded arm, pushed back each time it comes into contact with the water stream.

He came with a spring-loaded arm that could throw a playing card when pulled back and released.