Singer Heavy Duty - Adjusting Bobbin Tension, Please read the Description before posting questions.

The Clark family co-founded the Singer Corporation in 1851—which became the best-selling sewing machine brand worldwide in only four years. And they’ve been investing in their own community ever since. 🎨: Eddie Marshall | Reason Magazine

On August 12, 1851, Isaac Singer patented a machine for commercial use that would revolutionize the textile industry during the latter part of the Market Revolution. This machine was first invented in 1790 by Thomas Saint. It is Isaac Singer’s patents though that made the machines more accessible. Of course, that machine was the sewing machine! By 1852, tailors and sewing businesses in Sacramento had sewing machines in their shops, which greatly increased production over sewing by hand. For toda