It is a print from Home Interiors, I believe. I just can't remember if it was in the plastic shiney "brass" frame, the white fake wood frame, or the tan fake bamboo frame...
If the tubes go into the glass jar, it looks like a suction machine. Our old ones had reuseable glass jars that you suctioned gunk into...now they are disposable plastic.
Back when...mentally ill people were usually not listened to. Their complaints went unheard, and if they accused anyone of anything...well who cared...they are insane! But I believe this sign reminds nurses that they are accountable, no matter who they serve.
Usually someone that was in "seclusion" was chemically restrained if not physically restrained. For the most part...there weren't really any coherent thoughts while they were in this bed...
Some of the new psych furniture has wooden sides, they are built in the room, and bolted to the floor on the "inside" of the wooden sides. They are then calked and sealed to floor to prevent anyone from getting any nuts, bolts, or screws out of the bed. Other of the furniture looks like the plastic kids beds and they are also sealed to the floor.
The plastic cover is so that it can be sanitized. Also, psych mattresses are covered in a tough plastic that is sealed on the sides so that they can't be ripped open and used to hurt oneself or hide contraband inside.
Also, even in psych hospitals today, if a resident uses their bed to hurt themselves, they can have their mattress and bedding on the floor. They are making progress with "psych" furniture that looks less institutional, and more homelike...only with no screws, nuts, or bolts that can be taken out. Also, "psych" mattresses are all sealed with vents sewn into the seams so that the mattresses can not be torn open. It is nice to know that they are making steps to make a better environment for those with mental illness.