Walter Sammons (1890-1973) was African American inventor from Philadelphia. In 1920 he received a patent for an improved comb that straightened hair. According to him, he invented a heated comb that removed the nappy's from the hair.
Yes, the hot comb ( I still have one - just in case).
Thanks, Mr. Sammons - boy do I remember getting my hair pressed for church on Saturday evenings and by Tuesday I was tore up again. The grease use to sizzle and I would cry "ouch" that hurt. My moms used to try and get every strand - I used to say, " not the baby hairs".
Those were the days. How thankful I was when I got my first perm!