The thorough moon.NASA.gov/exploration page Moon Missions shows the image below.
I instantly recognized the apparatus on the Surveyor 3 lander extending in front of Apollo 12 commander Charles Conrad Jr. as a spring loaded boxing glove, adapted more recently (either from the Surveyor 3 or the Coyote's implementation) by a Wallace and Gromit mission shown below.
Question: But I'd like to know exactly what was Surveyor 3 doing with a spring-loaded boxing glove-like device?
Apollo 12 commander Charles Conrad Jr. examines the robotic Surveyor 3 spacecraft during his second extravehicular activity (EVA) on the Moon on 20 November 1969.
Full size available here where the caption says
Apollo 12 astronaut Alan L. Bean, lunar module pilot, examines the robotic Surveyor 3 spacecraft during his second extravehicular activity (EVA) on the Moon on 20 November 1969. Surveyor spacecraft pioneered the technology that enabled Apollo astronauts to reach the Moon.
The Lunar Module (LM) Intrepid is in the background (right). This picture was taken by commander Charles Conrad Jr.
Intrepid landed on the Moon's Ocean of Storms on 19 November 1969 only about 600 feet (180 meters) from the Surveyor 3 spacecraft.
The television camera and several other components were taken from Surveyor 3 and brought back to Earth for scientific analysis.
Because of the conflict in names, I've just asked Which Apollo 12 astronaut is shown examining the Surveyor 3 lander in this photograph?