Improvements in Mechanism for Operating Windows and the like.
Year: 1898

page_text: Date of Application, 16th Aug., 1898-Accepted, 19th Nov., 1898
COMPLETE SPECIFICATION.
Improvements in Mechanism for Operating Windows and the like.
I, ROBERT EDBROOKE, of 10, College Place, 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 state-
ment:-
This invention consists in improvements in mechanism for opening and closing
windows of the kinds known as swing casements, hopper casements and the like.
The window-operating mechanism which constitutes this invention is con-
structed, arranged and operated as follows. Extended through a supporting
bracket is a main operating rod fitted at one end with a handle. That part of
the rod which is contained within the bracket carries a ball or bulb which, with
the socket, constitutes a pivot on which as a centre the rod is free to move within
suitable limits. From the other extremity, to a suitable point therefrom, the
rod is screw-threaded and is furnished with a pair of adjustable stops fitted with
clamping screws or set, pins.
On the screw-threaded part of the rod and adapted to work thereon as a nut
is a pin over the ends of which loosely fit the jaws of a forked lever which at the
other end is adjustably connected by an eye and a set screw, or equivalent means,
to a spindle or cross-shaft. A similar lever is similarly connected to the spindle
or cross-shaft. Through the pin-nut carried between the jaws of, the second
lever is passed the screw-threaded end of a rod which is connected at the other
end to a bracket fixed to the casement. Each of the said pin-nuts is free to
turn about its own axis. By turning the handle of the main operating rod, the
latter is rotated and the bell-crank, which the two levers make with the shaft
to which they are clamped, is operated through the medium of the connecting
rod to open or close the casement according to the direction in which the handle
of the main operating lever is turned. The stops aforesaid determine the limits
of travel of the pin-nut working on the main operating rod.
Referring to the accompanying sheet of illustrative drawings, Fig. 1 is a side
view, partly sectional, of my improved casement-operating mechanism. Fig. 2
shows a part of the mechanism, the levers being spread apart and extended for
the purpose of clearer illustration. Fig. 3 is a front view of the supporting
bracket a and shows the face of the cover part of the socket. Extended through
the supporting bracket a, which is screwed to a wall or other support, is a rod b.
That part of the rod b which is enclosed within the socket and cover carries a
ball secured on the rod b by a pin passed through it and through the rod, as
The rod is free to move about the centre of
shown in dotted lines at Fig. 1.
the ball within limits fixed by the apertures a¹. The rod b is fitted with a
handle b. From the other end to a suitable point therefrom the rod b is screw-
threaded. Adjustable stops d fitted with clamping screws d' are carried on the
screw-threaded part of the rod b which also carries a pin-shaped nut e over the

page_text: ends of which loosely fit the jaws of a forked lever f which, at the other end, is
adjustably connected, by an eye and set screw, or equivalent means, to a spindle
or cross-shaft g to which is similarly connected a second lever h carrying at its
other end a pin-nut i over the ends of which loosely fit the jaws of the fork pro-
vided at that end. Through the nut i is passed the screw-threaded part of the
rod which is pivotted at & to a bracket fixed to the casement m.
Both of the nuts e and i are free to turn each about its own axis.
By turning the handle of the rod b, the latter is rotated, but has no axial
motion. The nut e travels on the screw-threaded portion of the rod b and the
bell-crank, consisting of the levers f and h and cross-shaft g, is operated to open
or close the casement, through the medium of the rod j, according to the direc-
tion in which the handle b is turned. The strain exerted in the operation is
mainly borne by the ball and socket bracket.
The stops dare, as aforesaid, for governing the range of travel of the pin-
nut e.
They are adjusted and set to positions at which the casement can be
fully opened and tightly closed. When the nut e reaches either of the stops d
further strain upon the casement and other parts is thereby prevented.
By the provision of the nut i and the screw threads on the rod j, the distance
between the nut and the point of attachment to the casement is made capable
of variation. Accordingly, in cases where my invention is applied to more than
one casement through the medium of a common main operating rod and a com-
mon lever connecting the main operating rod to a common cross-shaft, the
several rods, corresponding to j connected to the several casements can be inde-
pendently adjusted so as to produce equal effect on each casement of the series
in the sense that each casement is uniformly affected as the handle of the main
operating rod is turned.
At Fig. 4 is shown in plan, and at Fig. 5 in part section and part elevation, a
modification relating to the ball and socket pivot of the rod b. According to
this modification, the ball is made as a solid swell upon the rod, instead of being
separately made and fixed as shown at Fig. 1.
Having now particularly described and ascertained the nature of this in-
vention and in what manner the same is to be performed, I declare that what I
claim is
1. Mechanism for operating swing, hopper and like casements; said mechanism
consisting of a main operating rod such as b screw-threaded for a given distance
from the end nearest the casement and having towards. its other end a ball or
swell such as e contained within a bracket such as a, about the centre of which
said ball or swell the rod has a limited range of radial movement, levers such
as f and h, constituting, with a cross-shaft such as g, a bell-crank lever, of which
the lever is loosely connected to a pin-shaped nut such as e working on the
screw-threaded part of the rod b; the lever h being loosely connected to a
shaped nut such as i in which works a rod such as j pivotally connected or
pin-
hinged to the casement; the said parts being constructed, arranged and operated
substantially as hereinabove described with reference to the accompanying sheet
of illustrative drawings..
2. In mechanism for operating swing, hopper and like casements as set forth
in the preceding claim, the stops d, or their equivalents, adjustable on the main
operating rod and adapted to be clamped or otherwise set on the said rod, sub-
stantially as hereinabove described and for the purpose specified.
Dated this 15th day of August 1898.
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NICHOLAS WATTS,
Chartered Patent Agent; Bristol.