CONNON'S PNEUMATIC
DIAPHRAGM SHUTTER
Marketed by
G. Gennert, New York 1893 - 1901
Source:
U.S. Patent and Trademark Office
Connon's Pneumatic Diaphragm Shutter was
patented by John Robert Connon of Ontario, Canada, on April 28, 1891, Patent No. 451,027, as a "Slide Shutter
for Photographic Cameras".
The shutter was designed to fit within the Waterhouse
slot on a lens, and was tripped pneumatically. Connon's patent was
assigned to Gustav and Morris Gennert of Greenville,
New Jersey. The shutter was marketed
through G. Gennert, but it's unknown whether Gennert was the manufacturer. Connon also
patented a Circuit-style panoramic camera under Patent No. 369,165 dated August
30, 1887.
Appearing in G. Gennert's Descriptive Catalogue of Photographic Apparatus
and Supplies believed to date to 1893, Connon's Pneumatic Diaphragm Shutter would continue to be offered through 1901,
as part of Gennert's "Outing Equipment" outfit.
I've yet to come across an example.