I believe singer made the long shuttle machines (at least the model 128) until the 1950's.
You can get bobbins from any sewing supply shop that sells sewing machines.
yes they did
Most (if not all) current Kenmore machines are... Janome! Bobbins for Janome will work in Kenmore and vice-versa.
Since there are different adjustments for every brand of sewing machines, the best you can do is taking it to a technician who will teach you how to make bobbins. It's a very easy operation.
Most sewing machines require bobbins, so you will most likely need one. Look up the specific machine to find out what size or type of bobbin is ideal.
Generally, bobbins for sewing machines are quite inexpensive. They should be found for about one dollar at sewing and big box stores.
I'm not exactly sure what you are asking, but if it is "WHAT IS a sewing machine bobbin?" then I can help. The sewing machine bobbin is the round "wheel" like part that holds the thread under the sewing needle. In the older machines it was metal, and in the newer machines it is mainly plastic. Mostly, these bobbins are not interchangeable from one machine to the next. Each sewing machine brand requires its' own specific bobbin. Without the bobbin (with thread on it!) a machine is unable to sew.
All the Emdeko machines I have seen are 15 Class oscillating shuttle models and use the 15 Class bobbins.
Have the instruction book but does not mention so I have the machine and I would say same size as the singer but are metal OK ( bobbin ) Most Kenmore sewing machines (including this one) take class 15 bobbins which you can find at Joann's, Walmart, and most places that deal in sewing machines. They come in either plastic or metal.
yes you can it wont effect anything
Just like they do now, except foot powered. Flywheel connected to paddles, band of leather connected to drive shaft. The bobbins and internals have changed minimally.
Juki and Brother make sewing machines that are good.