Mystery Clamp

[hardpanman]

    I ran across these clamps at the Goodwill Clearance Center. Cannot find any information on them. Any ideas on what they are supposed to clamp?

[Northwoods]

Why are they grooved, why do they swivel, and why is there no pad on the end of the screw?

[hardpanman]

Beats me.

[Northwoods]

          ;-)

[john k]

Studied these a bit,  am thinking for clamping something to tubing or pipe.   The bottom swivels so as to fit more compactly into a case, seen something like these long ago.  When?????

[crankshaftdan II]

Possibly a overhead leveling clamp for holding black iron or galvanized pipe--the flat groved part fits into a sheet metal clamp that gets anchored into a concrete ceiling with powder actuated loads or anchorments via hammerdrill.   the screw levels the pipe in a horizontial fashion or gives it pitch for drainage or other applications...MY WAG

[Chillylulu]

Not a pipe hanger, nothing like it in any of the old catalogs. 

A lot of hangers,  in the day, were simply bent rod.

Chilly