Edison Phonograph Prop
Description
This phonograph was created as a prop for an escape room puzzle. It does not make contact with the cylinder and has no drive rod so the arm does not progress down the cylinder. The cylinder does spin. This was modelled after the Edison Phonograph but I took some liberties. The box was laser cut. The interior of the box contains a pulley to drive the cylinder and a photo interrupter to let a microcontroller detect when the cylinder is rotated. In my setup, the cylinders have RFID tags in them and the reader is in the box as well. When the cylinder is rotated the RFID tag is read and the appropriate audio for that cylinder is played over speakers. The shafts are 1/4" bolts. The arm is also attached with a 1/4" bolt through the box with a washer. The arms have 608 bearings pushed into them. The cones are connected to the arms with a short 1/4" bolt. The cone on the rotating arm also has a spring on its shaft. The idea is that the arm is unlatched, opened, and a cylinder is inserted so it rests on the drive cone. The other arm is closed and the spring holds that cone tightly against the cylinder. The ratcheting parts are optional. I didn't want to merge a mesh into my project so I combined the ratchetOuter with the the RatchetBracket in the slicer. The cone for the output is made from black paper that is just taped to the diaphragm. It needed to be easily replaceable in case it was damaged. I originally started designing this to be functional and play the actual cylinders- but doing a lot of research they all sound terrible and are fragile and finicky- not a good fit for an escape room where things need to just work over and over. I didn't 3d print the cylinders- they were cardboard tubes dipped in wax. They could certainly be printed.
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