Fritz Gegauf Aktiengesellschaft Bernina-Nahmaschinenfabrik

Itz Gegauf Aktiengesellschaft Rnina-Nahmaschinenfabrik

Michael Berger

André Stucki

Gerard A Durville

Beda Steinacher

Roland Beer

To determine the thread supply on a lower-thread bobbin (), holes () are arranged in the shape of a spiral in a flange () of the bobbin. Light from a light source (), which is directed towards the flange (), is reflected only by those holes (), behind which there is no longer any thread, so that the light beams () reach the rear flange () and can be reflected therefrom and received by the light receiver ().

Sewing or embroidery machine

An arrangement for changing bobbins in sewing and embroidery machines is arranged on the cover () on the lower arm of the sewing machine (). With a push-button () and a slide (), the bobbin case () with the bobbin () lying therein is released from the hook base () and made accessible to outside of the sewing machine () when the cover () is opened.

Growing community of inventors

Constance, Germany

Michael Berger