Handlock

This efficient assembly is mounted on anti-vibration points, and handlocks enable the trolley to be rigidly fixed in pre-set and intermediate focusing positions.

Source: wiktionary

Rowe International, Inc., subsidiary of Triangle Industries, Inc., Whippany, N. J. BBC 8 combination coin and bill changer, features roller take-in feed, modular coin tubes, twist-out handlock that can be recombinated on location.

Source: wiktionary

"Handlock" deck covers are available for access to tank cleaning holes and other types of openings on barges, tankers and cargo vessels. They can be installed by setting a cover down over a hole and turning the handlock.

Source: wiktionary

Hugh MacGerrald, being duly sworn and examined, deposeth that he was apprehended by William Graeme, the Provost Marshal, who kept him seven days in his custody, tied with a handlock, and two several times the said Graham threatened to hang this examt. if he would not do service against Phelim MacPheagh, one time sending for a ladder, and another time shewing a tree, whereupon he would hang him and the ropes and withes, but the examt. making protestation of having no matter to lay to the said Phelim's charge did choose rather to suffer than to impeach him without a cause.

Source: wiktionary