Sewing machine mechanisms
09-16-2015, 01:21 PM
#11
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Join Date: Mar 2014
Location: Colorado
Posts: 160
Wow, these are different! What is the part called which starts as a big cylinder by model a, splits in the 2nd a, twists and curves in b, straightens and enlarges in c -- what is that called and what does it do? That's an amazing amount of metal under these machines.
Can we see the top sides? Please?
Dianne in Colorado
Can we see the top sides? Please?
Dianne in Colorado
09-16-2015, 03:20 PM
#12
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Join Date: Oct 2012
Location: San Lorenzo, CA
Posts: 5,361
The cylinders on these are the "cams" that control the needlebar and the shuttle.
The one closest to the handwheel drives the needlebar
The one further from the handwheel drives the shuttle.
The early ones were solid, and then they figured out that they could save a lot of material and weight (ease of treadling) by making them just the grooves.
[ATTACH=CONFIG]530929[/ATTACH]
The one closest to the handwheel drives the needlebar
The one further from the handwheel drives the shuttle.
The early ones were solid, and then they figured out that they could save a lot of material and weight (ease of treadling) by making them just the grooves.
[ATTACH=CONFIG]530929[/ATTACH]
09-17-2015, 07:19 AM
#14
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Join Date: Oct 2012
Location: San Lorenzo, CA
Posts: 5,361
Another unusual one. This is a Grover & Baker double chainstitch machine. No shuttle or bobbin!! It uses a spool of thread on top and one below (the lower spool is held on a bar in the cabinet) It uses a curved needle on top and a spiral "needle" on the bottom (really more of a corkscrew shuttle)
Underside
[ATTACH=CONFIG]530963[/ATTACH]
Topside
[ATTACH=CONFIG]530964[/ATTACH]
Underside
[ATTACH=CONFIG]530963[/ATTACH]
Topside
[ATTACH=CONFIG]530964[/ATTACH]
09-19-2015, 02:59 PM
#15
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Join Date: Mar 2014
Location: Colorado
Posts: 160
Steve.....WOW!!! Thank you for the large version of your avatar picture. What an absolutely stunning machine.
People might enjoy this animation, which looks like it would be what your machine does to create stitches:
http://oldsewingmachines.acandanex.co.uk/g&b.html
We are busy with an event here in Colorado, no time to keep up with the goings on, but thank you for posting about this machine.
Dianne in Colorado
People might enjoy this animation, which looks like it would be what your machine does to create stitches:
http://oldsewingmachines.acandanex.co.uk/g&b.html
We are busy with an event here in Colorado, no time to keep up with the goings on, but thank you for posting about this machine.
Dianne in Colorado
09-20-2015, 11:27 PM
#17
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Join Date: Sep 2011
Location: Washington
Posts: 4,001
You people are amazing. I don't think I have enough time on this planet to learn as much as you have already learned!
So interesting and just the information you find and share with us is awesome! Thank you. I must say too that I can't remember half of it anyway, but love reading all about it. Loved the pictures.
So interesting and just the information you find and share with us is awesome! Thank you. I must say too that I can't remember half of it anyway, but love reading all about it. Loved the pictures.
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