An Improved Adjustable Grille for Doorways, Windows, and like Openings.
Year: 1888

page_text: Date of Application, 10th Oct., 1888
Complete Specification Left, 10th July, 1889-Accepted, 7th Sept.,
1889
PROVISIONAL SPECIFICATION.
An Improved Adjustable Grille for Doorways, Windows, and like
Openings.
I, NESTOR FRÈRE, of No. 13, Upper Westbourne Terrace, in the County of
Middlesex, Engineer, do hereby declare the nature of this invention to be as
follows:-
My invention relates to an improved adjustable grille for the closure, to any
desired degree, of openings such as windows, large or small, doorways, and other
openings, as well as for the protection of glazed surfaces.
In carrying my invention into effect, I fix guide-rods, preferably at the sides of
the opening or surface, upon which a suitable number of bars are adapted to
move freely. The latter are connected by lazy-tongs, the feet of whichare suitably
fixed to the bottom level of the said opening or surface.
1 provide a suitable cord-and-pulley gear for raising the grille, and proper grips
by which it can be dragged down.
The above described grille may be mounted in a movable frame.
COMPLETE SPECIFICATION.
An Improved Adjustable Grille for Doorways, Windows, and like
Openings.
I, NESTOR FRÈRE, of No. 13, Upper. Westbourne Terrace, in the County of
Middlesex, 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 :-
My invention relates to an improved adjustable grille, for the closure, to any
desired degree, of openings, such as windows, large or small, doorways, and other
openings, as well as for the protection of glazed surfaces.
In carrying my invention into effect, I fix guide-rods, preferably at the sides of the
opening or surface, upon which a suitable number of bars are adapted to move freely.
The latter are connected by lazy-tongs, the feet of which are suitably fixed to the
bottom level of the said opening or surface.
I provide a suitable cord-and-pulley gear for raising the grille, and proper grips
by which it can be dragged down.
The above described grille may be mounted in a movable frame.
In order that my invention and the means by which the same is to be carried
into practical effect, may be thoroughly understood, I will now proceed to describe it
in detail referring in so doing to the accompanying figures, which are to be taken as
part of this specification and read therewith.
Fig. 1 is an elevation shewing a window-opening fitted with my invention. The
full lines shew the grille down, and the dotted lines shew it up, i.e., as closing the
opening.
Fig. 2 is a side elevation corresponding with the full lines lines of the former.
The figures shew the grille as adapted to work vertically.
A is a fixed or movable frame to which the operative parts of my invention are
fixed. B, B are the guide rods. C, C¹ are the respective terminal bars of the grille,
the former fixed to the end of the frame or of the rods, and the latter adapted to slide
upon the rods. The intermediate bars C² are also adapted to slide upon the rods.

page_text: All the bars are connected by links d which are pivotted at their adjacent ends d¹ to
the bars, and at their opposite ends d² to each other in pairs so that the grille is
adapted to be extended and retracted after the manner of a lazy tongs.
E, E are a pair of cords fast to the respective ends of the terminal bar (1.
They are led over pulleys e e', and have their opposite ends fixed to a roller F,
adapted to be rotated in suitable 'bearings in or upon the frame A by a winch F¹.
The rotation of the drum in one direction effects the extension of the grille and
the consequent closure of the opening.
Any convenient handle G may be provided for the purpose of retracting the
grille.
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:
The combination of fixed, terminal, and intermediate bars, links and pivots, con-
stituting an expansible grille with guiding and expanding and retracting devices, as
'set forth.
A
PHILLIPS & LEIGH,
22, Southampton Buildings, Chancery Lane, W.C., Agents for the Applicant.