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gage with the said inclined planes, and means for raising and lowering the said clamp members. 3. A tube clamp, comprising a lower 5 clamp member formed of a channel-shaped plate having upwardly projecting inclined planes at its sides, an upper clamp member formed of a channel-shaped plate having downwardly projecting inclined planes at
its sides which engage with the aforesaid 10 planes, and means for raising and lowering the said clamp members. In testimony whereof I have affixed my signature in the presence of two witnesses. OSCAR KRAUSKOPF. Witnesses: ADOLPH WEHMEYER, ED PETER.
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