ClipArt ETC
"Repair-link for round-link chain. A, section by a meridian plane; B, perspective elevation showing the completed link with both halves in place; C, top view of one half-section; D, top view of the other half-section, showing the break of the joint. The interrupted side is open wide enough to pass the stock of the solid link adjacent to the repair-link on either side." -Whitney, 1911

Repair Link of Chain

"Repair-link for round-link chain. A, section by a meridian plane; B, perspective elevation showing…