Improvements in Blinds of Corrugated Sheet Metal.
Year: 1887

page_text: Date of Application, 14th May, 1887
Complete Left, 14th Feb., 1888
Complete Accepted, 13th Apr., 1888
Improvements in Blinds of Corrugated Sheet Metal.
I, PERCY 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, to be as follows: -
These improvements relate to the manner of lodging the rollers of blinds in their
bearings, the fastening of the corrugated sheet metal to the roller, the combination of
the single sheets of corrugated metal with one another, the fastening of the rail, the
lining of the edges, an automatical arresting device, modifications of movement by
dispensing with the roller, the application of the blind as a protecting roof, the
arrangement of an air-circulation and of a device for preventing rain from
penetrating.
The improved bearing is closed behind and can be fastened in the wall by means of
a quadrangular pivot. The bearing is open above and provided with a box containing
a piece of solid lubricating material, which is pressed onto the roller by a piece of
metal lying loose on it.
The pulleys are tightly shifted on the roller and prevented by springs from moving.
The roller may be a slotted tube or it may be solid and provided with a notch. Or a
notch may be cast into the pulley, in which case the roller must have a passing spring
which is worked off near the bearings.
The pulleys have such a shape as to give the corrugated metal a good hold and
thus allow the latter to be merely fastened by a wedge.
The single plates of metal are hung into each other before they are corrugated
by means of simple folds which are rendered very durable by the subsequent
corrugation.
The rail consists of two parts, which are so shaped as to be able to receive the
roller between them when screwed together.
The blind is lined by means of buckle-like eyelets fastened one on each side of the
metal by a common rivet and so bent, that the eyelet-holes are situated about the
middle of a hollowing of the metal. Through the eyelets is then passed a strap of
leather or hemp.

page_text: The cord or strap for pulling up and letting down the blind passes from the pulley
over a roll from which is suspended a slide which has at its lower end two pins so
embracing the tail of a clip-lever, that, when the slide is raised, the cord or strap
strained, the nozzle of the click-lever releases the running notch. If however the
strap is torn or let loose, the slide is drawn downward by a spiral spring and
thereby the click-lever driven with its nozzle into the running notch, thus arresting
the blind.
For the purpose of increasing the admission of light, the roller and roller-box may
be replaced by the following device:
The blind is moved by a tooth wheel and toothed rods strengthened at the gearing
places by means of metal strips. The blind when moved up is shifted into notches
arranged in the manner of a roof above the window-opening, whereby the blind
affords at the same time protection against the weather.
The blind may however also be lodged in the floor of the room.
Or the blind may be moved up and down by means of spindles, the casing being
provided on both sides with forks. The driving work, which may be suitably
arranged, consists of a horizontal axle provided with two tooth wheels and the said
spindles are provided with conical tooth wheels. The axle and thereby the spindles
are rotated by means of a strap or rope passing over a pulley situated on the axle,
the said forks catch into the threads of the spindles whereby the blind is moved up
and down.
If the blind is employed as a roof, rolls are arranged on both sides of the rail,
which rolls run in the notches, which are so shaped that the rolls cannot recede from
each other.
To prevent wet and rust to accumulate in the corrugations, the lower halves of the
same are provided with longitudinal cuts, and with tongues behind these cuts to
prevent rain-drops from running down, when the blind is in a vertical position.
The said cuts supply ventilation and greatly contribute to the preservation of the
material.

page_text: The lifting belt is driven from the roller E, passing over the roller f, fig. 13, to
which the slide F hangs and acts as a brake.
The slide F is provided with two pins f1f, which hold the end of the lever g
between them, and when the slide is kept raised, as shown in fig. 13 i.e. when the belt
is in tension, then the heel h of the lever G is kept free from the holes in the shutter i;
but if the belt should break or be let down too quickly then the slide F falls and the
lever G is forced into the position shown by the dotted lines and the heel h catches in
the hole in the blind and so arrests its progress.
Figs. 14 to 22 show modifications in the manner of the lifting and lowering gear of
this new blind, in which the shaft and its casing can be done away with, and the space
thus gained added to the window.
Figs. 14 to 18 show the blind moved by means of a cog-wheel while the corru-
gations of the blind form the corresponding cogs for the wheel to fasten into ; in this
arrangement the edges of the roller or blind are stiffened by iron strips see fig. 18 in
order to prevent the blind from wearing through on the rubbing surfaces, and holding
the corrugations at their proper pitch.
Fig. 14 shows the blind H seized by the shaft g (which has the form of a toothed
pinion), and lifted up; the blind is led outside the window and thus made to form a
shade against the weather.
Fig. 15 shows a similar arrangement, but the lifting shaft is placed at the other side
of the roller.
Fig. 16 shows an arrangement where the roller is guided under the floor.
Fig. 17 shows the same arrangement, but the roller is led along the ceiling.
Fig. 19 shows an arrangement of lifting by means of a screw shaft, the blind being
provided with projections k k¹ which catch in the screw spindles 11. These spindles
being worked by the horizontal shaft p through the bevel wheels o-m and o¹—m²,
the shaft p being driven by a belt or rope over the pulley r.
Fig. 20 shows a cross section of this arrangement through line III IV of fig. 19,
and fig. 21 a cross section through line I II fig. 19.
The roller can be so arranged that it can either be shoved under the floor, or raised
out over the front of the window, and fig. 20 shows such an arrangement; in such a
case the blind is provided at each side with rollers q q' which help to guide the blind
in the grooves H1 H2. Another great advantage of this blind is, the prevention of
rust caused by the sweating of the brickwork or by rain, for the blind is provided
with holes u figs. 24 & 25 which let the water run through, and also provided with
the pieces t which prevent the water from running direct down.
The holes u also act as ventilators, by letting the air circulate through and
through.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is
In blinds of corrugated sheet metal :
1.) The washer B bearing the notch c³ and the projection in combination with
the key c for the purpose of fastening the blind to the washer B.
2.) The connection of two corrugated strips, by folding the edges in such a manner,
that the joint lies midway between the corrugations.
3.) A guard plate formed by the two bent plates C and D between which the last.
corrugation of the roller is held.
4.) The arrangement of the cars d or e placed on opposite sides of the roller, in
combination with the side bands D1 and D2, which pass through said ears for the
purpose of keeping the roller or blind in its proper form.
5.) The combination of the grooves H¹ H' arranged on both sides of the window
with the transporting tooth-wheel g and the corrugated roller H forming the rack for
the purpose as described.

page_text: 6.) The arrangement of holes u in combination with the turned up strips t on the
upper and inside of the corrugations for the purpose as described.
7.) The arrangement of two side-screws ¹ in combination with the projections k k¹
fixed on the sides of the roller H for the purpose as described.
8.) The arrangement of rollers q q¹ fastened on the ends of the rollers in combi-
nation with the grooves H¹ H' (fig. 22) for the purpose as described.
9.) The arrangement of the slide ff being drawn back by the spring F¹ in
combination with the slide F and with the double lever G, with the heel hand the
holes in the roller for the purpose as described.