I've seen gait belts in old hospitals before... didn't know what they were until now, thanks! But I don't think they could be classified as a restraint, they're more like "handles" to help move patients.
This was a morgue, not a solarium or a bedroom. These were built for medical practice and efficiency, not to look pretty or comfort the residents... I don't think assumptions towards patient care should be made from these "behind the scenes" places.
That would be the contagious disease hospital on North Brother Island, home of Typhoid Mary; they helped the survivors of the General Slocum fire on June 15, 1904. 1,021 people died, mostly women and children.
North Bother Island is between Queens and the Bronx, Renwick is on Roosevelt Island (formerly known as Blackwell's Island) which is between Queens and Manhattan.
Most people who were committed to a state hospital lived there for the rest of their lives. It was common for families to leave a child or family member at an asylum where they didn't have to live with or pay for an 'abnormal' person; someone who might of been frowned upon in the social mentality of that time. Some families cared and visited, some didn't... those that had no where to go died and were buried at the hospital's cemetery. Autopsies were sometimes performed to help find out how diseases and mental problems affect the body and how to treat those cases. Their graves are only marked by a patient number and their religion... so is the end of the loneliest existence to live.
But seriously, it's a matter of deduction, a diesel motor not on a car, lots of wires hanging out, and some dials with voltage output give it away... it's a lot easier to tell when you're looking at the thing up close.
For that matter, why do kids start fires in the hospitals they hang out at, Danvers, Byberry, Kings Park etc... it's just gonna lock the place up tighter and make it smell horrible for years. Boredom? Pent up aggression for getting picked on in school? Pure stupidity? I never figured it out.