Vintage band type piston ring compressor pliers

[Northwoods]

Got an old pair in a box purchase the other day.  I found a picture on Google Image the other day but it did not pan out.  And now it is nowhere to be found.
I need a patent wizard.

They are cast and nickel? plated.  Different patent dates on the center swivel.
One says PAT'D Feb 11 1902.
Other says PAT'D Oct 27 1903.

[wvtools]

You do not need to be a patent whiz to use the datamp.org website.  All you have to do is type in the patent date.

It is a jar wrench, not a piston ring compressor.

http://datamp.org/patents/displayPatent.php?pn=742238&id=15807

[Northwoods]

Maybe it was patented as a jar wrench, but based on the other tools in the box, it is clear that it was being used as a piston ring compressor.
Other tools included an old school piston pin installer (Snap-on S9005), sockets, 2 T bars, speeder, Milwaukee Tool & Forge, squeeze-type valve spring tool, tap and die set, wrenches, etc.
The old boy who owned it adapted it for his own use.
Probably stole it from the kitchen!

[Bill Houghton]

And I've seen piston ring compressors pretty much of that design.  Here's a modern example: https://jet.com/product/detail/7438c484171241c3a4a950d2c9b35bb6?jcmp=pla:ggl:b_nj_dur_gen_hardware_a2_b1:tool_accessories_a2_other:na:PLA_643009581_30054712702_pla-161721866940:na:na:na:2&code=PLA15&gclid=CIn1ueKkttACFVLcfgodAOgA-w&gclsrc=ds

[turnnut]

Northwoods, sorry, but your spelling of stole is wrong.

the proper spelling is "borrowed"

[amecks]

The style that Bill posted are the only way to install some pistons on small engines, particularly two-strokes.  Some of my British motorcycles would also require the compressor to be removable from under the barrel.

I made a compressor band like that and used regular pliers to squeeze it - it worked well, but it would be nice to have the real tool.
Al

[Bill Houghton]

I used to use hose clamps on air-cooled VW rings*, where you had to remove the compressor tool after you slid the cylinder down over the rings.

I've done it, on a BMW motorcycle, with carefully applied pressure from fingertips (fingernails, actually), lubricated by plentiful blue air**; but it helped that the cylinders on BMWs were tapered at the bottom, so the ring fed smoothly into the cylinder diameter.

*Not my idea; I learned it from a book.
**Air reaches its maximum lubricity at about turquoise.  Additional cursing applied after that just gums things up; when the air reaches navy blue, it's time to quit for the day.

[Papaw]

Though I had real ring compressors, I often used hose clamps on motorcycles.

[oldgoaly]

I had used the wind down / wrap around style, then got a set of lid removers and love them!
I don't have a pic of them, they have their own drawer in the old snappy box.