Year: 1898

page_text: I, ROBERT ALLAN, of 100, Flinders Street, Melbourne, in the Colony of Victoria,
Engine Fitter, 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 object of this invention is to provide a window fastening adapted to prevent
the rattling of windows and to hold the meeting rails of the upper and lower sashes
so closely together that no instrument of any practical value for nefariously forcing
the lock can then be inserted between the said rails.
The keeper or part to be affixed to the upper sash on the outer meeting rail has in
it recesses for receiving the end of an automatic locking bolt of any ordinary character,
and for receiving a special projection from the main part of the fastening, that the
part to be affixed on the inner meeting rail. This main part has two essentials,
besides a casing. Firstly there is a spring actuated bolt adapted to engage with the
keeper and prevent vertical movement of either sash, the said bolt having a handle
by which it may be retracted at will to unlock the window, whilst the part which
enters the keeper is bevelled underneath so as to ensure automatic locking of the
said bolt when the window is closed. Secondly there is a non-retractable projection
or lag extending from the casing over the upper sash meeting rail. This lug has a
wide head or end and narrow neck. In order to allow the lug to enter the keeper,
the latter is recessed at the top as well as on the inner face, but the face opening is
narrow, the walls or sides thereof coming close in to the neck of the lug. The said
walls or sides are also so bevelled that as the lug descends into its recess, the two
meeting rails will be drawn close together, nntil they meet or almost meet. The
bevelling aforesaid is supplemented by corresponding bevelling on the head of the
lug.
The automatic spring bolt aforesaid is best located immediately above the said
fixed lug, but I may sometimes use it at one side of the same. Above the recess it
should enter is a notch (or are notches) which it will first enter. If the window
sashes will not properly close so that the meeting rails are quite flush (which is a
frequent experience) the spring bolt will still operate effectually by engaging a notch
in the keeper.
Referring now to the attached drawings wherein my invention is illustrated
Figures 1 and 2 show the keeper in perspective, and in cross section respectively,
Figures 3 and 4 show the casing and main parts of the fastening in plan view (from
beneath) and side elevation respectively. Figures 5, 6, 7 and 8 show respective
modifications of the views in Figures 1, 2, 3 and 4.
A is the keeper,-B the casing of the main part of the fastening,-C is a spring
actuated bolt, D is a lug or projection on casing B,-E is the recess in the keeper
open both at the top and inner side under the path of the lug 1 when the latter is
being moved downward,-F are the bevelled walls of recess E said walls also
approaching one another so as to have between them a space narrower than the head
of lug D, G is the neck of lug D i.e. a part more narrow than the part more
remote from casing C,-H is a bevel on those sides of the head of lug D which
are near the neck G,-that is the sides which will contact with the bevelled

page_text: edges F, J is a spring actuating bolt C,-K is a handle or means of retracting
bolt C when the window has to be unlocked,-M is a notch in the keeper A
into which the bevelled end of bolt C shoots when the window is properly closed,―
and L is a notch in keeper A immediately above the notch M into which when the
windows have not closed into proper position but have nearly done so the bolt will
shoot and so lock the window. There may be a series of notches as I instead of only
one.
It will be seen that various slight modifications may be made whilst retaining
matter of my invention for example the bevel at H is not essential, or if H is used
bevel F could be omitted, and the relative sizes and positions of the parts might be
varied.
When either or both bevels are used the shutting of the window will obviously
cause the meeting rails to be drawn together. The effect is to prevent a good deal
of rattling of the windows and to prevent the inserting of burgling tools between
the sashes.
The lug D and the bolt C might indeed be set side by side as provided for by
Figures 5 to 8, but it is a very much superior arrangement and a saving of metal also
to place the bolt C immediately above the lug D. In that position even if a knife
blade were driven up between the sashes with a view to retracting bolt C, it would
strike the bottom of the lug D which would effectually protect the bolt C from
interference.
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. In a window fastening a keeper having in combination the several parts above
described with reference to Figures 1 and 2.
2. In a window fastening a keeper having in combination the several parts above
described with reference to Figures 5 and 6.
3. In a window fastening a casing having in combination the several parts above
described with reference to Figures 3 and 4.
4. In a window fastening a casing having in combination the several parts above
described with reference to Figures 7 and 8.
5. The combination of a keeper having parts as in Figure 1 with a casing having
parts as in Figure 4.
Dated this 7th day of November 1898.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.