Strand Electric Stand ref 626. Compression Clamps

[JJB]

Hi. I have a 1950/60's Strand Electric stand. It should have a ball ended swivelling collar and 2 ball ended lever operated compression clamps. It seems as if it is common for the compression clamps to be lost, which is the case on mine. Does anyone have any lying around or any tech drawings of one so that I can remanufacture?

 

[timsabre]

 

They looked like this... Just a u shaped casting with a bolt closing the open side if I remember correctly (usually a lot less shiny than that...)

Edited November 5, 2022 by timsabre

[Brian]

They look a bit like posh car battery terminals. 

[Whiskers]

Tim

The outer on the clamp was rigid and did not compress, the locking knob screwed into one of a pair of rods with chamfers  that  pinched the pole and gripped it, a spring pushed them open when the locking screw was slackened. Even in the day they were hard to replace and various inventions were used, now I fear it is steel rod and hand tools. 

Take a length of rod the same size as the holes largest diameter, file a flat along the length of the rod until it will go in the hole,  it is D shaped   cut about 2" off the rod and tap a hole in the centre for the clamping screw, file a curve on the side of the rod that will mate with nearly half the extension pole, cut another piece of bar, a little shorter and drill a clearance hole  for the locking screw, file a similar curve that will mate with nearly the other side of the pole, the nearlys give a small gap when clamped and are where the spring lives, add washers and you are ready to lock .  

I have a recollection that these were shiny, so perhaps you could start with Aluminium  to make the filing easy.  

HAPPY CLAMPING

 

 

The safety did compress

 

[Whiskers]

 

[alistermorton]

That sounds a lot like how crank cotter pins used to work on bicycles - tightening the nut (or on the stand, the clamp handle) pulled a chamfered pin inward.

Edited November 17, 2022 by alistermorton

[Whiskers]

sort of

2of those, just the chamfered bits but curved to the pole, one tapped and the other clearance for the locking screw