A clamp comprising in combination a guide having parallel upper and lower members and interconnecting side member forming a closed guide frame, said lower member carrying a plane clamping surface, a plunger passing through the said lower member of said frame, a second plane clamping surface carried on one end of said plunger and positioned adjacent said first mentioned clamping surface carried by said frame, a spring in said guide frame surrounding said plunger and extending between said lower member and an abutment carried by said plunger adapted normally by applying force between said lower member and said abutment to force said clamping surfaces together and means carried by said plunger and movably associated with said frame to compress said spring and force said clamping surfaces apart whereby they may be placed over objects to be clamped.
Aircraft Engineering and Aerospace Technology – Emerald Publishing
Published: May 1, 1944
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