Spinning, Doubling, and Twisting Silk Machine Patent Model
Patent No. 977, issued on October 10, 1838
Harrison Holland of Northampton, Massachusetts
The central part of Holland’s patent concerned the stop motion mechanism on a silk thread making machine. If a thread broke, a small rod, connected to each of the threads by bent wires, would drop. A lever, to which the rod was attached, would come in contact with the drum and then stop the machine by throwing it out of gear. Also included in the patent was a method to change the twist of the silk thread by using a short cylinder.