Quickcet C clamps.. whats the story?

[slowtwitch73]

I recently picked one of these up. Any rhyme or reason for them or just someone's take of a better mousetrap? Seems there's a fair bit of mechanical force there, but any advantage over a decent 'regular' c clamp?

 

[PCustoms]

Copper screws=for welding

 

[slowtwitch73]

Yes, this example has copper, but they make them with 'regular' screws as well.

 

[Mintgrun]

It's too bad the "Patent Pending" is not a number. I'll bet the description in the patent explains the concept. Twice the leverage with the second screw? Easy access from two directions? I believe the copper plating is added to keep welding BBs from sticking to them. Or, at least to make them easier to knock off. It will also prevent rust, like the plating on TIG welding rods. Cool clamp!

 

[crguy]

Made by Grand. Those have been around for some time. I have a couple, but seldom see the need for one.

 

[Private Lugnutz]

Mistaken post. Delete.

 

[RTM]

The second screw gives you a big force advantage.

On another site, there is talk of extra force without twisting, as the regular clamps often twist the pad at full pressure

OldTools Archive

swingleydev.com

 

[slowtwitch73]

RTM, thanks for that.. that's what I was getting at. Seems plausible at the very least its to counteract twist. Not sure if it's a an issue that needs such a solution, but interesting.

You can definitively get it very tight, but it seems the fixed face tilts and would dig into anything remotely soft. A swivel at the fixed end as well would solve that.

 

[Provincial]

Here is Vintage Machinery's take on Grand and Quikcet:
http://www.vintagemachinery.org/mfgindex/detail.aspx?id=11633

And thanks to Internet Archive, here is the 1943 Grand Specialties catalog, with lots of information on the products and the company.

 

[RTM]

The 1943 catalog description says the main screw had a ratchet action, just push to set. Slow twitch, does yours do that?

Grand Specialties Company : Grand Speed Clamps : Grand Specialties Co. : Free Download, Borrow, and Streaming : Internet Archive

36 p., illus., 19.6 cm, trade catalog

archive.org

 

[slowtwitch73]

No mine just has the two screws as pictured.

They made a few different varieties.

 

[Provincial]

The 1943 catalog description says the main screw had a ratchet action, just push to set. Slow twitch, does yours do that?

Grand Specialties Company : Grand Speed Clamps : Grand Specialties Co. : Free Download, Borrow, and Streaming : Internet Archive

36 p., illus., 19.6 cm, trade catalog

archive.org

I have a smaller one, made of steel stampings, that does this. Researching this one is how I came across the catalog.

 

[454ragtop]

I have a few of them, different types, including a pipe clamp.