I am one of the contributing editors for the "Check the Oil!" magazine, the voice of the I.P.C.A. The I.P.C.A. is the largest club for the petroliana collectors. In July, 1995, I wrote an article about the American Pump Company, and put in the article quite a bit of their history. Your grandfather was mentioned in the article, and maybe your father Roy Scheiding Jr. I have been able to find more information on the company since that time, so if you have any specific questions please contact me. To read the article go to: www.crspub.com
Click on the gas pump site, click on the "CTO" articles, it is about the 2nd or 3rd one down the list.