Abstract: An electroplating rack includes a cathode flight bar from which depends an insulated rack bar over an acid bath. A clamp is fixed to the rack bar, and has a bridge electrically connected to the flight bar through a conducting core inside the insulated rack bar. The clamp has a main body made of plastic, which includes a slot in which protrudes the bridge. An electrically conducting spring clip is installed in the slot, and is formed of two arms continuously biased into a spreaded, opened condition in the slot. A screw carried by the main body, when rotated in a first direction, can force the spring clip into a closed condition, in which it can hold an article to be electroplated between its two arms, and in which one of the spring clip arms is forced against the bridge member. Thus, electrical current can pass through the rack flight bar and conducting core, then through the bridge member, the spring clip and finally into the article to be electroplated.

Abstract: A holding clamp device, for releasably holding a thick planar article over ground, comprising: an elongated main arm member, defining first and second opposite end portions; a pair of first and second tubular bar members, each defining an outer end portion and an opposite inner end portion; a rail member, integral to an intermediate section of the main arm member and slidably engaged by the second bar member inner end portion, wherein the second bar member is maintained by the rail member parallel to the first bar and wherein the second bar member is movable relative to the first bar member while continuously remaining parallel thereto; a first biasing member, continuously biasing the first and second bar members toward one another; and a second biasing member, for discretely biasing the second bar member away from the first bar member, against the continuous bias of the first biasing member.