Stahlketten wrote: ↑20 Nov 2024, 04:48
Do your Chinese H&R handcuffs have a raised ridge on each side of the double arms that the single jaw swings through? If they do, then they are the newer type. If they do not, then they are the older ones. Considering that you commented that they are on the small side, I suspect they are the older ones. The newer ones are actually quite large (larger than the typical US police type handcuffs such as S&W and Peerless) and about the same size as the S&W Model 1. The price is often quite high on eBay but is only about $30 through some mail order places.
These have the ridges - they're clearly supplied new, although the Western-style packaging they came in was clearly done by the local reseller, not the manufacturer.
Actually comparing them with other cuffs, they're actually about the same size and opening range as other cuffs I have, to within a millimetre or so. What makes them seem smaller is that when you close them by pressing the "top" of the ratchet to the lock body, the different shape of the lock bodies means they've closed further. Also the bracelets on the H&R knock-offs are slightly thicker (in both dimensions) than my other cuffs, making the space in the middle look smaller.
Here's a comparison pic:
- IMG_1123.jpg (74.94 KiB) Viewed 1433 times
(The round holes in the body of the hinged cuffs are where I drilled out the S&W-style double-lock slots to admit a padlock, allowing them to be "triple locked".)
The older style had a problem with the double lock easily disengaging. To do it, pull on the swivel and twist. I have not found that to be true about the newer style.
I can't see anything in this (new) mechanism that would allow that to work - looking down the barrel of these things, the swivels seem quite a way from the actual lock mechanism. I wonder why the old ones did that.
I'm not sure how they put the swivels on though. I think the barrel is just a piece of steel tube, and the swivel is machined to shape, inserted into the tube, and then the end of the tube pressed around the neck of the swivel to secure it. (Then the double arm of the bracelet is welded to the tube, the lock inserted and pinned into place with the pins you can see on the outside of the barrel, the swing arm riveted into place, and the two cuffs joined to complete the job. Electroplating probably happens prior to lock insertion.)
That's a lot of "hot" metalwork, compared to S&W-style cuffs, where the major parts are just stamped from steel sheet and riveted together.
As for picking the Chinese H&R, I believe a suitably sized drinking straw or rubber tube could be forced over the triangular piece and would have enough friction to open the lock. I have not tried this yet.
I was able to engage and disengage the double lock with a piece of cable sheath, but that requires very little torque, and compared to that required to unlock them, and there simply wasn't enough grip. The right size and stiffness of tube might do it, but we're talking improvising from what's around ...
Of course with the double-lock open I can then shim them ...
... and ... picked.
Well, that's ruined them.
It does require two different improvised tools, which makes an escape a little more difficult than just finding a single sewing needle like the "traditional" swing through cuffs.