Improvements relating to Louvre-windows.
Year: 1891

page_text: Date of Application, 26th Oct., 1891-Accepted, 28th Nov., 1891
Improvements relating to Louvre-windows.
I, RICHARD HOWARD LEAKER, of Montague Villa, Kingsdown Parade, in the
City and County of Bristol, Engineer, 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 louvre-windows and consists in an improved method of
hanging and operating the louvre "boards." According to this invention the louvre
boards, which may be of wood, metal, or other suitable material, are carried in
brackets or shoes situated at each end of the boards and pivotted in the window
frame. The brackets at one end of the boards are furnished with cranks the pins
of which are fitted into holes made for their reception in a movable bar or handle
common to all the boards. The crank pin of one of the louvre boards is passed
through a slot made in the movable bar, the slot which is narrower than the diameter
of the pin, being cut at each side to receive the pin.
The louvre boards are moved apart or opened by moving the bar downwards and
inwards. They are closed by the reverse motion. They are kept open to any
desired extent by means of a binding screw which passes at a right angle across
the slot made, as aforesaid, in the movable bar and is screwed up after the boards
have been adjusted.
Fig. 1 in the accompanying drawing represents a vertical section of a louvre-
window constructed in accordance with this invention.
Fig. 2 is a similar section, the louvre boards, which in Fig. I are shown closed,
being represented as open.
Fig. 3 is an elevation of Fig. 2.
The louvre boards a which in the drawing are represented as of wood, but may
be of other material, are carried in shoes or brackets a¹ which are pivotted at each
end at a² to the window frame. The shoes at one end of the boards are furnished
with cranks a the pins a' of which are fitted loosely into holes provided for them
in the movable bar or handle b. In the latter is a vertical slot c which, as seen in
the enlarged view Fig. 4, is cut out at or about midway to receive the pivot pin of
one of the louvre boards. At a right angle to the slot c is a screw d the threads of
which fit into a shoe d¹ fixed at one side of the bar b. The screw is turned by
means of the head e formed on or fixed to the outer end of the screw. It will be
readily understood that by screwing the screw d up sufficiently tight the pivot pin
of the louvre board passed through the slot c may, at will, be firmly pinched and
rendered incapable of turning. Accordingly, by so doing, the boards, which are
raised and lowered by the handle or bar b, are held in any position to which they
are adjusted, that is to say, they are capable of being fixed after having been opened
to any required extent.
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 :-
In a louvre-window, the improved method of and means for operating the louvre
boards hereinabove set forth, according to which the boards are hinged to the
window frame and by cranks to a common operating handle or bar in which is
a vertical and recessed slot such as c through which the pin of the crank of one of
the louvre boards is passed and is capable of being firmly clamped therein by a
screw or its equivalent so as to maintain the boards at any point to which they are

page_text: adjusted at the will of the operator, substantially as hereinbefore described with
reference to the accompanying sheet of illustrative drawings.
Dated this 22nd day of October 1891.
NICHOLAS WATTS,
Bristol Bank Buildings, Bristol, Agent.