Lockjaw Forceps, ca early 1900s, sometimes sold as Gross' Lockjaw Forceps. The short ends of the tool (right side) were put between the teeth of a lockjaw victim. Squeezing the handles (left side) of the forceps ratcheted the short ends apart, forcing open the jaws of the tetanus victim. This instrument was from a set of instruments purportedly used by Dr. William Park of the City of New York Department of Health.