Improvements in or relating to Devices for Opening and Closing Windows and the like.
Year: 1897

page_text: Date of Application, 6th Aug., 1897-Accepted, 4th Dec.,
1897
COMPLETE DI FULTIVATION.
Improvements in or relating to Devices for Opening and Closing
Windows and the like.
A communication from the Firm of DOYEN AND DUPONT of Grivegnee lez Liege
in the Kingdom of Belgium.
I, ALFRED JULIUS BOULT, of 111 Hatton Garden in the County of Middlesex,
Chartered Patent Agent, do hereby declare the nature of this invention and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
This invention relates to apparatus for operating movable windows or the like
such as in the doors of railway cars, carriage and other windows, the usual leather
or fabric strap being dispensed with and whereby the window may be opened to
any desired extent, perfect tight closing of the window being ensured.
The apparatus is constituted by an arrangement of jointed levers ABC (Figs. 1
and 2) which are operated by means of the lever D serving as a band lever. The
points of support of the lever device are on the cross bar F, at EE, and the point
of support or fulcrum of the operating lever is on the cross bar G. These cross
bars and G are secured to or in the door or framing under or adjacent to the
window.
On the pivot of the lever D on the cross bar G, is keyed a polygonal disc H
shown in detail in Figs. 3 & 4. Against two opposite sides of said cam press
springs II thereby holding the window and handle D in the corresponding posi-
tion occupied by the disc. As many opening positions can be obtained as there
are sides of the polygon, divided by two. The movable frame J (Figs. 5 and 6)
is recessed or cut away in its lower edge to receive the metal plate abc which
engages with the ledge or splash-board def of the door or frame.
At the back, the frame J is provided with a bracket K L (Fig. 1
in detail) connected to the raising device. A by means of a bell crank
lever MN (Fig. 8. in detail) pivoted to the bracket K L.
crank lever carries at its other end a roller n which bears when in its
raised position against the metal guide 0. Figs. 7 & 8 show the bracket KL and
the bell crank lever MN respectively, in front and side views.
This bell
When the window is closed and the raising apparatus shown in Fig. 1 is operated
the lazy tong levers A (Fig. 5) under the action of the hand lever ) and links B
and C (Fig. 1) draw the end M of the bell crank lever MN (Fig. 5) downwards,
causing it to turn about its pivot. At this moment the roller n engages with the
guide and is forced to rise on the inclined plane gh thereby raising the movable
frame J connected to the lever M N by means of the bracket KL so that the plate b c
no longer touches de. Then the part L N of the lever device has a tendency to
come into a horizontal position, and as the roller n continues to press against the
guide it causes the frame J to be pressed back into the position shown in Fig. 6.
The window is then free and if the handle or lever is moved further in the same
direction, it will draw the frame downwards and open the window (Fig. 2).

page_text: When it is desired to shut the window the handle D is operated in the opposite
direction, the levers A raise the frame J and by means of the lever arms ML push
the latter forward when it is at the top of its travel so that be meets and rests
upon de.
Having now particularly described and ascertained the nature of this invention
as communicated to me by my foreign correspondent and in what manner the
same is to be performed I declare that what I claim is:-
:-
1. In apparatus for operating movable windows or frames by means of levers a
polygonal-sided disc and spring retaining device for the purpose of holding the
window or frame in any desired position substantially as described.
2. In apparatus for operating movable windows or frames by means of levers, a
bell crank lever device as MLN substantially as and for the purpose described.
3. The combination and arrangement of parts constituting the complete device
for raising and lowering movable windows or frames substantially as described and
illustrated in the accompanying drawings..
Dated this ca 1.
1007
BOULT & WADE.
Agents for the Applicant.