M. T. Henson
Mr. Henson is the patentee of Henson’s Automatic Vise of seven different kinds of groove and four different kinds of iron. The sizes vary from the delicacy of a jeweller’s instrument up to the ponderousness of three hundred pounds. The advantage claimed for this device over the ordinary vise is its accommodation or adjustment to any irregular surface. In other words, it is claimed to be self-adjustable and automatic. A specially noteworthy feature is the preservation of the parallelism of the jaws at all times, all widths, and on any shaped article. Besides these advantages, it lays claim to simplicity, strength, durability, and cheapness. They are shipped to all points, and vary in price from six to twelve dollars.
From History of Shelby County, Ohio; R. Sutton & Co, Philadelphia PA, 1883