Harold N. Yarnell, Jr., 87, of Lancaster passed away peacefully Monday, November 30, 2015 at the Mennonite Home. Born in Lancaster he was the son of the late Harold N. Yarnell, Sr. and the late Elizabeth Sophia (Coulson) Yarnell. He was the beloved husband of Lydia B. Yarnell with whom he just celebrated 67 years of marriage in November. He was the founder and the chief executive officer of the original Yarnell Electric Co. founded in 1967 and later became known today as the Yarnell Security Systems. Harold enjoyed boating, fishing and most of all spending time with his family. He served in the US Army as a Private first class during WWII. In addition to his wife Lydia, he is survived by his children: Ronald R. Yarnell husband of Tammy, Teri Lynn Yarnell and Michael D. Yarnell all of Lancaster. Three grandchildren, Ronald R. Yarnell, II, Vanessa A. Herr, Heather Yarnell Beck; Five great-grandchildren, Sean, Adam and Aiden Yarnell, and BaiLee and Anaiah Herr, two step-grandchildren, Heather Hoover and Nicholas Duffy, and two step great-grandchildren, Chloe and Brandon Fulcher. Funeral Services will be held at 2:30PM on Monday, December 7, 2015 at the Charles F. Snyder, Jr. Funeral Home & Crematory, 3110 Lititz Pike, Lititz, PA 17543. A viewing will be from 6-8PM on Sunday evening at the funeral home and again one hour prior to the service at the funeral home on Monday. Interment will be in Conestoga Memorial Park with military honors.