UNICUM
SHUTTER - MODEL OF 1893
Bausch
& Lomb Optical Company, Rochester, New York 1893-1898?
Most collectors of pre-1900 self-casing cameras know the Unicum name, associating it with the Model of 1897 shutter having its
"Unicum" nickel-plated name tag:
Unicum
Shutter - Model of 1897
But this original
model was actually the first shutter to be given the Unicum name. I've added the "Model of 1893" designation in deference to its believed
year of introduction, and to help distinguish it from later Unicum models.
To reduce the weight of their current Iris Diaphragm
model, Bausch & Lomb designed a new time and instantaneous shutter more conducive
to lighter cameras. Calling it the Unicum, the word derived from the Latin
neuter nominative singular form of "unicus" meaning unique. Dr. Rudolf Kingslake, in his article titled "The Bausch & Lomb Shutters",
written for the Western Photographic Collector's Association's journal, The
Photographist, Summer, 1981, described the shutter as
"rather crude". Although its simplistic
design lacks the sophistication found on Bausch & Lomb's earlier and later
shutters, its action is relatively smooth. The shutter was cocked by cycling
the lever at top, and released either manually or pneumatically. The speed dial is marked with four settings
of 0, 1, 2 and 3.
Blair Camera Company, in an 1896 advertisement, refers to
this shutter as the " Improved
Crown Shutter". Per Dr. Kingslake, only one size was
offered, being a 20mm aperture with a 60mm external diameter. These measurements conform exactly to the
example shown here. This, together with the
aforementioned 1896 Blair ad which features the Special Folding Hawk-Eye in 4x5
and 5x7, suggests the shutter had enough latitude to handle both formats. The shutter's casing is stamped "Bausch
& Lomb Opt. Co. Pat. Jan. 6, 1891".
This date refers to Patent No. 444,083 which covered design elements of Bausch
& Lomb's earlier Iris Diaphragm Shutter of 1891 that were also incorporated
into this original Unicum - Model of 1893, the Unicum - Model of 1894 and the Unicum
Model of 1897:
Source: Google Patents
Dr. Kingslake indicated that this first model of the
Unicum Shutter appeared only briefly in 1893. However, its appearance in
catalogue engravings for Blair's Special Folding Hawk-Eye for at least four
years, would seem to contradict this. No
Bausch & Lomb catalog for 1893 has been found to support this, although the
shutter may have appeared between catalogue printings, and it does not appear
in Bausch & Lomb's June, 1894 catalogue of Photographic Lenses, Shutters, Prisms. For more information
on the Blair Special Folding Hawk-Eye,
look for it under the "Antique Cameras"
section on this web site.
This doesn't mean that this Unicum Shutter - Model of
1893" wasn't offered as a separate item in 1893. However, as Dr. Kingslake noted, Bausch & Lomb's simpler shutters didn't
appear in their catalogues as they were sold to camera manufacturers and not
directly to the public. This original model
Unicum is clearly shown in an engraving from Blair's Illustrated Catalogue and Price List for 1895, mounted on a
4x5 Special Folding Hawk-Eye. Blair's
catalogue lists it as an "Improved
shutter" with no formal name, also offering a Bausch & Lomb Iris
Diaphragm as an alternative. This original
model Unicum is also clearly shown in a engraving from Blair's Illustrated Catalogue and Price List for
1898, mounted on a 4x5 Special Folding Hawk-Eye and listed as an "Improved Unicum Shutter". Since some manufacturers during the 1890's
failed to update their engravings, this "Improved Unicum Shutter" may
have actually referred to the Unicum Model of 1897 which had already been
introduced. This is plausible given the small
number of Unicum - Model of 1893 shutters that are seen today, and that with the
superiority and popularity of their newest Unicum Shutter - Model of 1897,
Bausch & Lomb would have had no reason to still be manufacturing an
outdated design.
Whether this original model Unicum's production lasted
for a couple of months or for five years, not many were manufactured based upon
the few that have survived. At the very
least, it's an extremely scarce/borderline rare shutter.
Bausch & Lomb's Unicum
Shutter - Model of 1893 Source:
The Photographist, Summer, 1981
From Blair's
Catalogue of Hawk-Eye Cameras and Photographic Supplies, Season of 1898
From Anthony's
Photographic Bulletin, Volume VIII, 1896
Blair Special Folding
Hawk-Eye 4x5 with the Unicum Shutter - Model of 1893