Ventilating Window Blind.
Year: 1899

page_text: Ventilating Window Blind.
HARRY WILLIAM ROBERTS, Kingston House, Newmarket, Architect, do hereby
declare the nature of this invention to be as follows:-
This invention consists of side brackets of wood or composition from 18"
to 30" in height and 6" in width at top diminishing downwards screwed close
to the sash on the bottom part of the inside lining or bead of the sash frame.
On these brackets a board or waterproof material of varying width is fixed in
a slanting manner upwards and inwards from the bead of the window sill.
When the blind is used for dining rooms libraries and the like this board
or waterproof material is pierced for stained and other glass panels, but when
used for bedrooms a narrow board about 6" wide is used at the bottom and low
blinds of silk, sateen muslin and the like are hung by slats rods and bars to
the side brackets at the same slant as board and brought down over it on the
inside of room.
When the bottom sash is opened a few inches the fresh air is admitted with
diminishing force in an upright direction and without any draught.
The top part of the blind can be wire cane or the like.
Dated this 20th low of Contomban 1900 ·
Ventilating Window Blind.
HARRY WILLIAM ROBERTS, Kingston House, Newmarket, Cambridgeshire,
Architect, 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:-
The invention for the improvements of window blinds; has for its
object in addition to the ordinary advantages of a window blind; the admitting
of fresh air in diminished velocity, so that no perceptable objectionable draught
shall be felt, in the living room or sleeping chamber; and at the same time a
sufficient volume of fresh air shall be admitted to thoroughly ventilate the
room.
The amount of air admitted is regulated by opening the bottom sash more or
less as required.
The invention consists of side brackets fixed to the beads on the inside linings
of the window frame; from these brackets is suspended a blind of silk, muslin,

page_text: lace, stained glass, wire, cane, or any desired material; at the bottom part of
the brackets is fixed an arrangement which allows the air to pass from the
outside to the inside of the room through openings, with gradually increased
areas thus decreasing the velocity of the air and avoiding draughts.
The side brackets can be of wood, composition, metal, or the like, from 18"
to 30" in height and up to about 6" in width, at top; slightly tapering down-
wards; at the bottom a board or metal slat can be fixed slanting upwards and
inwards, or preferably curved as shewn in drawing and screwed to the window
sill; the arrows shew the entrance for fresh air at K, in this case about 1" wide,
about 3" wide at L, about 1" wide at M, and about 5" wide at N thus giving
the air 10 times the area to enter the room; this proportion can be varied and
regulated by slightly opening or closing the bottom sash.
2
I will now more particularly describe the invention by means of the drawing:
A is the bottom rail of the inside or lower sash of the window which in the
drawing is shewn opened about half an inch; B is the sill of the window frame
and C is one of the two side brackets, cut to shape; about 1" thick, out of hard
wood or the like, and fastened with three screws each, to the insides of the
beads, of the inside linings of the window frames; D is a piece of wood, com-
position, or metal such as iron zinc, brass or aluminium or the like screwed
to the bead on the window sill and fastened to the bottom part of the two side
brackets C; it has a lip O on the top edge to change the direction of the current
of air at this point; E & F are hooks for holding up the slats or rods for blinds G,
shewn in this case, silk or the like, which is held up by the slats P, P, resting
on the hooks E, F; H, shews the bead or inside lining of window frame, to which
the side brackets are screwed; K shews an opening as long as the width of the
window but " wide; L, M & N shew openings the same length but 3",
and 5" wide.
2
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is
1. The arrangement at the bottom of the side brackets, and between them,
admitting the air through a series of chambers with openings from the outside
to the inside with gradually increased areas substantially as described.
2. The arrangement at the bottom of the side brackets and between them,
admitting the air through a series of chambers with openings with one or more
lips to the top of the sides of the intermediate spaces, substantially as described.
3. The improved ventilating window blind substantially as described with
reference to the drawings.
Dated this 29th day of May 1900.