Isaac Chandlee was born in Nottingham on September 12, 1760, the son of Benjamin Chandlee, Junior. He died, unmarried, in Nottingham on December 10, 1813. On page 212 "Six Quaker Clockmakers" there is an illustration of a Plain Surveyor's Compass made by Isaac Chandlee, also on pages 221 and 222. The Ohio State Museum has an Isaac Chandlee Plain Compass. It is 14-1/4" overall, with a 5" needle.

Ellis Chandlee (1755-1816) also was apprenticed to his father, and he worked with his brothers in the shop. He established the firm of
Ellis Chandlee & Brothers, in 1790, shortly before his father's death. The firm was dissolved in 1797 when the youngest brother, John
Chandlee, left the firm. Ellis continued in partnership with his other brother, Isaac Chandlee (1760-1813), until about 1804, producing
clocks, surveying instruments, and other metal articles. Their products were signed "Ellis and Isaac Chandlee, Nottingham," or, in the
case of a surveying compass in the collection of the Chester County Historical Society, "E. & I. Chandlee, Nottingham." Isaac Chandlee
also produced clocks and instruments under his own name only, for there are a number of surviving clocks and surveying compasses
signed in such manner.

In 1943 The Historical Society of Pennsylvania published The Six Quaker Clockmakers by Edward Chandlee, a descendant of the colonial clockmaker family. The book is chock full of information and pictures regarding the amazingly talented Chandlee Family that made clocks, surveying instruments, and other things from approximately 1760 thru 1825. The copyright protection has apparently expired on the book, so I have attached the Isaac Chandlee chapter below, along with pics of the surveying instruments and some of the clocks Isaac made featured in the book.