HAMMER JOHN HAGBARTH: [en] A Flash-light and Shutter Operating Attachment for Photographic Cameras.. HAMMER JOHN HAGBARTH, October 13, 1904: GB190322669-A

[en] 22,669. Hammer, J. H. Oct. 20. Lighting-arrangements shutters.-A flash-light attachment for cameras comprises means for supporting and firing a flash-light charge, and, simultaneously operating the shutter, pneumatically. The attachment may be controlled by the alarm device of a clock. In the f ...