THE
PROSCH RAPID SHUTTER NO. 2
Prosch Manufacturing Company, New York 1888-1892
Prosch Rapid Shutter No. 2
Introduced in 1888 and reportedly three times as fast as their
Duplex Shutter, the Prosch Rapid was,
per the wording in some of their advertisements, "intended for
exceptionally quick work".
From Scovill's
The American Annual of Photography and Photographic Times Almanac for 1888
True to form, one glance at the massive coiled spring
says this shutter means business. An
improved form of Prosch's Eclipse Shutter, the Rapid's reputation was built
upon its most successful results, having been obtained through racetrack and
athletic work.
According to Scovill & Adams' How to Make Photographs for January,1892, the Rapid Shutter
had advertised speeds of 1/100th to 1/1000th of a second and was available in
two sizes: the No. 1 having a 1-inch
opening and the No. 2 with a 1-1/2 inch opening. The shutter had a manual
release, was only capable of instantaneous exposures and had no means for
adjusting the aperture. Patent No. 312,581 was granted to Cyrus Prosch on
February 17, 1885. Design elements from
this patent can be found in Prosch's Instantaneous, Eclipse and Rapid Shutters.
The patent drawing reflects the style of the Instantaneous and Eclipse that
were mounted forward of the front element, whereas the Rapid was positioned
between the front and rear elements. Although configured differently, all three
shutters employed a two-blade design.
Source: U.S. Patent and Trademark Office
Unlike the majority of Prosch's shutters, the Rapid
Shutter No. 2 shown here has no manufacturer's name or markings, other than the
number "51" found on the linkage.
Only a few examples of the Rapid probably exist, and it is among the rarest of all Prosch shutters.