Identifying older table loom AND using string heddles
I just bought an older tabletop tapestry loom. It isn't marked and I'm wondering if anyone recognizes it. Here's the seller's picture:
Unfortunately the little booklet had vanished, so all I have of it is this picture, which shows the loom:
The previous owner used it as illustrated, but it's easy to swap the lap-bar for the feet so it can stand on a table top.
I'd like to know the maker from curiousity, but I really need help with the heddles. When I pull on them nothing very useful seems to happen. Do I need to use them just one or two at a time? There's a lease stick sort of bar making the fundamental shed, although it's small even when the shed is turned on its side. But how do I make the pull shed? The heddle bar is fixed in place.
Thank you for your help. I'm quite new to tapestry weaving and suspect I'm missing something obvious.