>>5563186>>5563430Also if you look there is no "automatic" return, pin boys were hired to manually set pins and clear off the dead pins and return the bowling ball via the ramps, kids were usually paid about 5 cents a line, We actually have a pair of lanes of this style in a Club I belong to that date to the 1920's.
There is a foot pedal that the pin boy steps on and pops up metal guides, the pins have a hole in the bottom so they align correctly giving a consistent "rack". Although some earlier lanes didn't have that mechanical aid and it was done by sight and markings on the boards.