Can't post a picture cause of the rules, just google "baby cage".
In 1922 a patent was recorded in Washington by a woman named Emma Read for a literal cage meant to hold an infant (one per cage), which could be placed outside windows in high-rises and apartment buildings in general. The cage was designed “to be suspended upon the exterior of a building adjacent an open window, wherein the baby or young child may be placed…A great many difficulties rise in properly housing babies…in crowded cities…from the health viewpoint.” Mothers and nannies could then have unhampered floor space for cleaning and walking about, while baby got fresh air, multiple stories up. These cages were distributed to members of the Chelsea Baby Club in London, England, which seems to have been one of the few places where they were actually used.