William Strong, Mason v. Graham — Opinion of the Court
“ The object of the invention patented to the complainant was to produce an accurate and sure picker-staff motion in looms by a combination of devices, which, while giving great accuracy of motion, should so guide and hold the picker-staff as to enable it to work with the least possible friction and lateral disarrangement, commonly called 'wabbling.'In all picker-staff motions it is desirable, if not essential, that the end of the staff made to strike the shuttle should move in a right line, so as to drive the shuttle directly along the shuttle-race in the line in which it is desired to play. ”
