Treadle Sewing Machine Lada

Lada is Czechoslovak firm. After long preparations, the Joint Stock Sewing Machine Factory was founded in Soběslav on 1 September 1919. The first products were the straight-legged drum machines CB type 7, later in 1936 the newer type CB 77 with articulated mechanism. It was a very modern and powerful machine for that time. The Lada brand thus succeeded in breaking into the ranks of the world's top companies and establishing business connections in Holland, Belgium, France and the Middle East. It is also worth mentioning the production of craft sewing machines (type 11, later 35, 105, 135). In 1954 the first Czechoslovak sewing machine with zigzag stitch type 233 was introduced into production. 

My model is loosely inspired by a popular Type 77 I found in a house I bought. I tried to sew something on, but it didn't suit my hand position. Since I'm left-handed, my model is just right for me, turned mirror-image, as opposed to the commonly made machines. I think this model, which is a bit simplified, would look good in some country cottage decorations.

The model contains more than 2000 parts. Dimensions is 97cm x 38cm x 84cm. I would like to check the moving parts on the real model. However, I believe that when you swing the treadle, the motion is transferred to the large swivel wheel and from there via a belt to the smaller wheel on the left side of the sewing machine itself. Here I have simplified the whole thing and using the shaft and the cam on it, the right angle motion is transferred to the needle itself, which travels up and down as in actual sewing. The main problem I encountered became the construction of the rather large pulleys. I tried a few different variations, but they seemed flimsy. 

For a better idea I have marked the important moving parts with different colours. A spider has nested in one of the drawers. Amazingly, one has been hiding in there for almost 100 years.