Date: August 7, 1888
Creator: Pickering, Charles H.
Description: Patent for a new and improved water-trap. This design consists in "the combination, with a bent main pipe, of a vessel secured on the said main pipe and connected at its top with the interior of the said main pipe, a pin held on the bottom of the said vessel, a fixed sleeve provided with a spiral groove and engaged by said pin, a grooved pin held in the said fixed sleeve and resting at its top end on the bottom of the said pin, a roped connected with the said grooved pin, and a weight held on the said rope to counterbalance the said main pipe and vessel" (lines 103-114).
Contributing Partner: UNT Libraries Government Documents Department