IMPROVEMENTS IN VENETIAN BLINDS, PARTLY APPLICABLE TO OTHER BLINDS AND CURTAINS THAT ARE RAISED AND LOWERED BY CORDS
Year: 1878

page_text: PROVISIONAL SPECIFICATION left by Henry Simon at the Office of the Com-
missioners of Patents on the 28th December 1878. A communication from
abroad by Heinrich Freese, of the Hamburg Berliner Jalousie Fabrik, at Berlin,
in the German Empire.
HENRY SIMON, of No. 7, St. Peter's Square, Manchester, in the County of Lancaster.
"IMPROVEMENTS IN VENETIAN BLINDS, PARTLY APPLICABLE TO OTHER BLINDS AND
CURTAINS THAT ARE RAISED AND LOWERED BY CORDS." [A communication from
abroad by Heinrich Freese, of the Hamburg Berliner Jalousie Fabrik, at Berlin, in
the German Empire.]
According to one part of the present Invention venetian blinds are constructed as
follows:-Instead of the cords for raising and lowering the blind being made to
pass directly and separately from each end of the blind over the guide roller and
down towards the bottom of the window, as was the case heretofore (whereby it
frequently happened that in not pulling equally at the two pendant cords the blind
assumed a slanting position), a single hauling cord or band is passed over the guide
pulley at one end of the top frame along a groove to the other end of the frame
where it passes round a horizontal guide pulley to the first of the vertical guide
pullies over which the raising cords are passed and at such point it is connected to
the two separate raising cords passing over pullies at each end of a second groove
in the frame, so that on pulling at the single hauling cord both the raising cords
are pulled up simultaneously and equally. In order to facilitate the passage of
the raising cord coming from the farther end of the framing, the nearest guide
pulley may be placed at a somewhat lower level, the groove being deepened at that
end in a corresponding manner.
For setting the louvre blades of the blind to the required varying angular
position the vertical tapes which support them on one side of the blind are fixed
to the top frame, while those of the opposite side pass at top over guide pullies
in a groove in the top frame and are connected to a hauling cord passing over a
guide pulley in close proximity to the beforementioned guide pulley over which the
raising and lowering cord passes, so that both the hauling cords may be conveniently
arranged on one and the same side of the window.

page_text: According to another arrangement the hauling cord for raising and lowering
passes from the guide pulley at the one end of the top frame to a horizontal guide
pulley at the other end, thence to a vertical guide pulley in the middle and thence
down through central holes in all the louvre blades of the blind to the bottom
thereof. There it is connected to the ends of two cords that pass in opposite
directions over guide pullies in a groove in the lowest blade (which is made of
sufficient thickness to receive them), towards the ends of the blades, where they
pass respectively over another guide pulley and up through holes in the blades to
the top frame, to which they are attached, being by preference passed through holes
in the frame to the front face thereof, where they are fastened in any conveniently
adjustable manner. By this arrangement it will be seen that the guide pullies at
the bottom of the blind act as ordinary pulley blocks, reducing by one half the
pull required for raising the blind and doubling the length of hauling cord requiring
to be pulled down. The hauling cord for setting the louvre blades may either pass
down over a guide pulley at the same side as that for raising and lowering or at
the opposite side. The two above described raising and lowering arrangements
may also be applied with advantage to other blinds or curtains that are raised by
being drawn up in folds by means of vertical cords or bands pulled up from the
top.