Karl Nicolay

Title: Karl Nicolay and Sewing-Machine Fabric-Feed Innovations.

Introduction

Karl Nicolay is an inventor associated with Bielefeld, Germany, and Dürkoppwerke GmbH. His work includes sewing-machine mechanisms designed to control how fabric is held and advanced during stitching. Nicolay is credited with 3 patents.

Latest Patents

Nicolay’s listed patents focus on upper fabric-feed systems for sewing machines.

- **Upper fabric feed for a sewing machine.** This invention uses a feed foot and a hold-down foot that move vertically in alternating cycles. A continuously operating rotary drive and linkage convert rotational motion into the feet’s reciprocating movement. As each foot descends, it accelerates and then slows before reaching the fabric, helping control engagement during feeding.

- **Upper fabric feed device for sewing machines.** This device converts the main upper drive shaft’s rotation into vertical movement of a pressure foot and a feed foot. A crank disc, bell crank, sliding link, and ternary link coordinate the motion, while a spring-loaded arrangement presses the assembly toward the stitch plate. The mechanism rapidly reduces the feet’s speed as they approach the material, supporting controlled contact with the fabric.

Career Highlights

Nicolay’s documented patent work addresses the mechanical coordination of sewing-machine feet. The designs emphasize alternating fabric engagement and carefully controlled movement, particularly as the feet approach the material being sewn.

Collaborations

Nicolay is associated with Dürkoppwerke GmbH. His listed coworkers include Ernst V. Osten-Sacken and Klaus Hampel.

Conclusion

Karl Nicolay’s patents reflect a focused contribution to sewing-machine engineering, with mechanisms intended to improve the timing and control of fabric feeding.