Mitre clamp and the Maestro Mitre Clamp. Mitre clamp Mitre clamps are designed to hold mitre joints together. The earliest mitre clamps are a simple spring in a C-shape with sharpened points that are sprung onto the outside corner of the mitre joint. The right angled plates are higher than the screws and the red holder. The screws go under the frame (work-piece) to be held, and the red bit clamps down on the lower-edge of the frame. Recent designs are more complicated; a rigid body holds one fixed and one moveable jaw activated by a cam. Examples of the newer clamps
Mitre the end of the 18th century, due to changes in military fashion, the mitre had generally given way to the bearskin or had been replaced by the standard infantry tricorn or bicorn. The British Army made this change in 1765 and the Prussian Army in 1790. All Russian grenadiers continued however to wear mitre caps until 1805, even when on active service. The mitre in its classic metal-fronted 18th century form survived as an item of ceremonial parade dress in the Prussian "Leib-Grenadier No 1" and "1st Garde-Regiment zu Fuss" regiments, plus the Russian Pavlovskii Regiment, until World War I.