Helena A. Schwarz, GB190521878A

Improvements in Clamping Devices for Curtain Stretchers.

On November 30, 1905, Helena Ana Schwarz of Waterbury, Connecticut, patented an improved clamping device for curtain stretchers. Her design used a cam-operated lever and adjustable metal plate to securely adjust wooden stretcher bars without damaging them.

Date of Application: 27 October 1905

Date of Issuance: 30 November 1905

For more information, please refer to the following webpage:

• Espacenet