Those who like to nap as they ride now may do so in comfort by using a headrest device. It is made of a soft flexible fabric material which fits snugly, covering the ears to keep out noise, while shock absorbers protect your head from jolts.
Suspension straps attached to the roof hold contraption in place.
Besides looking very strange...and perhaps having your head ripped off in an accident...not a bad idea (for 1931)!