Year: 1886

page_text: Date of Application, 3rd Dec., 1886.
Complete Left, 10th Aug., 1887.
Complete Accepted, 27th Sept., 1887.
I, HERBERT JOHN HADDAN of 67 Strand in the County of Middlesex, Civil
Engineer, do hereby declare the nature of this invention, a communication to me
from abroad by Martin Georg Mitter, of Berlin in the Empire of Germany,
Engineer, to be as follows:-
This invention consists in an improved construction of venetian or slat blinds which
adapts them to cover the whole or any desired part of the window or opening and be
opened or closed when in any position.
The blind consists of slats resting on ladders in the usual manner, the uppermost
and lowermost slats being of a substantial thickness and the ladders fixed thereto.
These two said slats are connected to shafts, passing across the window and terminating
in tooth wheels gearing into racks arranged at the side of the window frame, and
suitable guides against the said racks. The lower shaft revolves in bearings attached
to the under side of the lowest slat-The upper shaft is supported in bearings attached
by angle bars to the said slats, the said angle or L bars being hinged at their lower
ends to the edge of the slat, the opposite edge of the slat being held against the under
arms of the said angle bars by a cord capable of adjustment. On loosening this cord
the upper slat and consequently all the slats may be set at any angle-The two shafts
are operated by cords in such a manner that the upper shaft may be set at any
position on the window and the lower shaft set at any distance from the upper shaft.
To the lowest slat or shaft may be attached a guard board or slat set at an angle
towards the window, for covering over that portion of the window in front of which
the lower shaft revolves. The cords for operating the rollers are set outside the slats
instead of passing through the latter-thus allowing the slats to be easily taken out
and replaced for cleaning and repairs. The ends of the slais are guided against the
sides of the window frame. On the front of the slats may be also arranged a cloth
DQT

page_text: blind, which may be wound on a spring or ordinary roller fixed either to the lowest
or uppermost slat. This blind may be unwound and set by a cord or hooks and will
automatically set itself when the slat blind is raised or lowered-Instead of attaching
the upper slat to the shaft in the manner described it may be firmly hung at one edge
from bearings therefrom the other edge being adapted to be set above or below the
first edge by a cord, and the slats thus set at any desired angle in either direction.
Dated this 3rd day of December 1886.
A New or Improved Blind.
I, HERBERT JOHN HADDAN, of the firm of Herbert & Co., Patent Agents, of
67, Strand, London, in the County of Middlesex, Civil Engineer, do hereby declare
the nature of this invention, a communication to me from abroad by Martin Georg
Mitter, of Berlin, in the Empire of Germany, Manufacturer and Engineer, 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 blinds or coverings for windows and openings and its
purpose is, first, to provide a slat blind capable of being arranged over the upper,
lower or central part of the window or opening the angle of the slats being
adjustable. Secondly, to so arrange the slats that the same or most of them may be
easily removed and replaced for cleaning, repairs etc., without necessitating the
removal of cords or other parts. Thirdly, to combine a cloth blind with said slat
blind in a novel manner as hereinafter described.
The improvements are illustrated in the accompanying drawings in which Fig. 1 is s
an elevation of the blind.
Figure 2 a sectional side view thereof with slats horizontal.
Figure 3 a sectional side view of the same with slats inclined.
Figure 4 a plan thereof.
Figures 5 and 6 are part elevations of the upper and lower ends of the blind and
Figure 7 is a part of a sectional side view of the same, illustrating certain modifi-
cations.
Figures 8 and 9 illustrate the mode of suspending the shafts.
Figure 10 is a detail view on an enlarged scale of the roller for the cloth blind.
Figure 11 is a part of a sectional side view illustrating a further modification.
On each side of the window is fastened an upright A provided with a toothed

page_text: rack B and carrying a projecting ridge C preferably formed of angle iron, on the
inwardly directed web of which the slats k are guided when moving up and down by
means of slits or recesses in their ends.
This movement and setting of the whole blind is effected by means of an upper car
or traveller W and a lower car or traveller W₁ between which the blind is strung.
These cars consist each of a wooden cross piece or slat to which are fastened the
bearings a, a' carrying the shaft b. Each shaft carries at its extremities the tooth
wheels c, cl gearing into the toothed racks B B₁ aforesaid. The shaft b is extended
beyond the tooth-wheels and the said extensions are guided under the rails C of the
angle iron before referred to upon the uprights A. The shaft is thereby securely and
straightly guided when rotating.
The bearings a a' are hinged to the cross piece and to the latter are secured the
ladder bands d, d supporting the slats of the blind.
Owing to the hinged connection of the bearings a, a' (Figs. 1, 2 and 3) with the
cross piece the latter and therefore the slats & are allowed to be brought in any
suitable inclined position (Fig. 3) by tightening or loosening the cord t¹ fastened to
one side of the cross piece. The car or traveller W is lifted or lowered by the cord t
connected to an eye l (Figs. 8 and 9) engaging on the roller b. The car 'W' is lifted
or lowered in a similar manner by cord s.
The lower car W¹ (Figs. 1, 2 and 3) consists of the same parts, as the upper car but
the bearing plates of its roller are preferably fixed rigidly to the cross bar, it carries
besides a slat connected with it and serving to cover the space occupied by the shaft
and parts when the toothed wheels c, c' of the car Wabut against the window sill.
Figures 7 and 11 show two modifications of the car W and W₁; on the shaft b are
situated two bearings a a¹ which extend upward over the shaft and are connected to a
wooden cross piece e to which is fastened the extremity of one band of each ladder d d
of the slats k. Under the axle & lies a second wooden cross piece e¹ connected on both
sides to the ladders d. It is therefore connected on the one side with the cross piece e
whilst on the other side it is supported by a cord which therefore serves to regulate
the angle of adjustment of the slats k.
In Figure 11 the shaft 6 is journalled half in the upper cross piece e, half in the
lower cross piece e¹. On one side the lower cross piece e¹ is movably connected with
the upper cross piece e by hinges g, whereby, when the cord is loosened, the slats k
are brought in an inclined position, while the upper cross piece e is retained in its
horizontal position.
The continuous horizontal position of the upper cross piece e is effected by a forked
guide G which is so fastened to the extremities on the upper side of e, that the two
ends of the fork catch over the guide rail C. A further essential improvement
consists in the arrangement of a curtain in combination with the blind as shown by
Figs. 2, 3, 4, 7 and 11. The curtain when the window is open and the slats of the
blind are in a horizontal position prevents flies and dust from entering the room to be
protected.
The curtain F may be so fastened to the upper and lower car or slat, or to any
other slat, as to be wound on an automatically rotating or other roller R (shown in
longitudinal section by Fig. 10) revolvable in bearings on the upper or lower or other
car or slat, while the opposite end is hung with a rod over hooks h.
By letting down or pulling up the blind, the axle R frees as much cloth as the
blind covers in surface, that is to say as much space as is produced between the
cars W and W. When the window is intended to be covered only by the slat blind,
the rod is lifted off the hooks h and the curtain F winds itself automatically on
roller R.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed, I declare that what I claim is :
1. The combination of a slat blind having an upper car W and a lower car W with
racks B B¹, each said car having journalled thereon a shaft b with toothed wheels C, C¹
at its extremities gearing with said racks.

page_text: 2. The combination shaft b cross piece W bearings a a¹ for said shaft, said bearings
being hinged at or near one edge of said cross piece, with cord r attached at or near
the other edge of said cross piece.
3. The combination with car W₁ of the slat f substantially as and for the purpose
set forth.
4. The combination with a roller or shaft of a cross picce e supported horizontally
by and over the bearings of the said shaft or forming the upper bearing thereof, and
a cross piece e¹ under said shaft, the said cross pieces e e¹ being connected on the one
side by bands or by hinges, together with cord connected to the free side of said
cross piece e substantially as and for the purpose set forth.
5. The combination with the cross piece e of forked block or blocks G thereon, and
rail C engaging into said block or blocks substantially as and for the purpose set
forth.
6. The combination with a slat blind, of a cloth blind adapted to be extended over
the face of said blind, the said cloth blind being mounted upon an automatic or other
roller R journalled on the lowest, uppermost, or other slat, together with means for
retaining the end of said cloth blind in desired position with regard to the slat blind.
7. In combination with a slat blind supported between vertically movable cars,
cords or cord systems s and t, for operating said cars one for each car, said cords
passing otherwise than through the slats for the purpose set forth.
Dated this 10th day of August 1887.
H. J. HADDAN.
By Herbert & Co.,
67, Strand, London, W.C.,
Agents to Applicant.