Year: 1899

page_text: Date of Application, 24th Oct., 1899
Complete Specification Left, 23rd July, 1900-Accepted, 1st Sept., 1900
Date of Application, 64111 Oct., 1000
Complete Specification Left, 23rd July, 1900-Accepted, 1st Sept., 1900
We, PERCY WALLIS and EUSTACE FREDERIC WALLIS, of Queensberry Road,
Kettering, in the County of Northampton, Manufacturers, do hereby declare the
nature of this invention to be as follows:-
-
This invention relates to improvements in photographic shutters in which the
blind is formed with two apertures as described in the Specification of Patent
No. 6214 of 1898.
The invention consists essentially in utilizing the interior of one roller for
taking the part of the blind containing the narrow aperture or slot thereby
reducing the size of the shutter and rendering possible the employment of a
much simpler arrangement of controlling and releasing levers on the exterior of
the shutter.
The roller is made hollow preferably of metal with a slot or slit to allow the
blind to pass in and out. In the interior of the roller is journalled a spindle or
second roller preferably made of pinion wire to which the edge of the blind is
attached and upon which it can be wound. This inner spindle or roller is turned
down at one end to provide a journal and is also provided with a square or other
shaped part on which a knob is free to slide longitudinally but not to rotate.
Between this knob and the outer roller preferably forming part of the pulley on
which the cord is wound is a small toothed clutch or the like by which the two
rollers are caused to rotate together in one direction while in the other direction
the inner roller can be rotated by the knob.
The knob is thrown in and out of gear by.a spring affixed to the side of the
shutter. The turning of the knob winds up the blind upon the inner roller and
the releasing of the knob permits the blind to be drawn out through the slit and
it can be wound on the exterior of the first roller.
When the narrow aperture is wound up inside the roller the shutter becomes
an ordinary time and instantaneous shutter.
The spring may be forked or of any suitable shape or a forked lever operated
by a spring may be employed.
The levers and plates for controlling the blind may be such as described in
Specification of Patent No 20,002 of 1898, or of any other suitable form for
retaining and releasing the blinds as required.
Dated this 21st day of October 1898.
WM. P. THOMPSON & Co.,
6, Bank Street, Manchester, Patent Agents.

page_text: Improvements in Shutters for Photographic Cameras.
We, PERCY WALLIS and EUSTACE FREDERIC WALLIS, of Queensberry Road,
Kettering, in the County of Northampton, Manufacturers, do hereby declare the
nature of this invention and in what manner the same is to be performed, to be
particularly described and ascertained in and by the following statement: -
This invention relates to improvements in photographic shutters in which the
blind is formed with two apertures as described in the Specification of Patent
No. 6214 of 1898.
The invention consists essentially in utilizing the interior of one roller for
taking the part of the blind containing the narrow aperture or slot thereby
reducing the size of the shutter and rendering possible the employment of a
much simpler arrangement of controlling and releasing levers on the exterior of
the shutter.
The invention will be fully 'described with reference to the accompanying
drawings.
Fig. 1. End elevation.
Fig. 2. Transverse section.
Fig 3. Front sectional elevation.
Fig. 4. Front sectional elevation showing different position of blind.
Fig. 5. End elevation.
Fig. 6. Extended plan of blind.
The blind A is formed with the two apertures a a¹ either of which can be
employed as required.
The roller B upon which the blind is wound is made with an outer hollow
roller and an inner roller C to which the blind is attached.
The outer roller b is preferably made of metal and is provided with a slit 61
throughout its length to allow the blind to pass in and out to the inner roller.
The inner roller C is preferably made of pinion wire as shown though it may
be made of any other convenient shape and is journalled to rotate within the
outer roller b. The edge of the blind A is attached to it and the blind may be
wound up thereon by rotating the roller.
The inner roller or spindle C is turned down at c to provide a journal and is
also provided with a square c¹ or other shaped part on which a knob D is free to
slide longitudinally but not to rotate. Between the knob D and the outer roller
preferably forming part of the pulley E on which the cord F is wound is a small
toothed clutch e or the like by which the two rollers 6 and C are caused to rotate
together in one direction while in the other direction the inner roller C can be
rotated by the knob.
The knob D is thrown in 'and out of gear by a spring lever H affixed to the side
of the shutter. The turning of the knob D winds up the blind upon the inner
roller C and the releasing of the knob permits the blind to be drawn out through
the slit b¹.
When intended for use for rapid or slow exposures the blind A is wound up
upon the inner roller C until the slit a is within the outer roller b the remainder
of the blind from say -y Fig. 6 being wound upon the exterior of the roller b
and withdrawn therefrom by the spring roller K in the ordinary way. When
intended for use for very rapid exposures the clutch e is released and the blind
wholly withdrawn from the inner roller and wound up upon the exterior of the
outer roller b to about the line -y the remainder of the blind being practically
out of use and wound up upon the spring roller K,

page_text: 66
When therefore the narrow aperture is wound up upon the inner roller C
inside the outer roller b the shutter becomes an ordinary "time" and instan-
taneous "shutter.
The blind in either position is released and controlled by the levers h and
operated by the pneumatic bulb M as described in the Specification of Patent No.
20002 of 1898. Or any other suitable or known form of mechanism for retaining
and releasing the blinds may be employed.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we wish it to be understood
that we do not claim per se either the blind which is described in the Specifica-
tion of the former Patent No. 6214 of 1898 nor the releasing mechanism which is
described in the Specification of the former Patent No. 20002 of 1898, but what
we claim is:-
1. A shutter for photographic cameras constructed with double roller upon
which to roll up the blind one roller being placed within the other and connected
by clutches or otherwise so that they may rotate together in one direction while
the inner roller is free to be rotated alone, in the opposite direction substantially
as described.
2. In a photographic shutter provided with a blind with two exposing apertures
the combination with the roller b upon the exterior of which the blind is wound
for exposing purposes of the inner roller C upon which a portion of the blind can
be wound when not in use the clutch e'for connecting the two rollers together and
the spring lever H by which the clutch is moved in and out of gear substantially
as described.
3. A photographic shutter constructed and arranged substantially as described.
Dated this 18th day of July 1000
WM. P. THOMPSON & Co.,
Manchester, Liverpool, London, & Birmingham, Patent Agents.