An Improved Fastener suitable for Securing Window-sashes and for other purposes.
Year: 1890

page_text: Date of Application, 3rd May, 1890
Complete Specification Left, 2nd Oct., 1890-Accepted, 8th Nov., 1890
PROVISIONAL SPECIFICATION.
An Improved Fastener suitable for Securing Window-sashes and for
other purposes.
I, JOHN LAKEY, of 40 Clara Street, South Benwell, Newcastle-on-Tyne, in the
County of Northumberland, Pattern Maker, do hereby declare the nature of this
invention to be as follows:-
My invention has referonco to a simple construction of fastener which can be
easily operated, will not be liable to get out of or ler, and will prevent rattling of
windows or of other articles such as shutters or the like to which it may be applied.
In order that the nature of my invention may be clearly understood I will describe
it as applied for example to a window: Upon a suitable plate adapted to be secured
to the top of the lower sash is pivoted a lever of the first order constructed with an
extension having a curved edge or surface eccentric to the axis of the pivot or fulcrum
of the lever, and upon another suitable plate adapted to be fixed upon the lower part
of the upper sash there is a look-like projection with which the before mentioned
extension can by partial rotation of the lever about its pivot be caused to engage,
the arrangement being such that in one position of the lever (say parallel or approxi-
mately so to the upper bar of the lower sash) the look like projection of the upper
frame will be free so that either sash can be opened. By a partial rotation of the
lever about its pivot the eccentric curved surface can be brought into contact with a
part of the hook-like projection another part of which will then overlap the before
inentioned extension of the lever and as the movement of the lever is continued in
the same direction the curved eccentric surface acting as a cam upon the hook-like
projection will gradually draw and hold the two sashes together whilst the over-
lapping part of the hook-like projection will prevent opening of either sash. The
part of the curved projection that overlapped by the hook-like projection is made
wedge like, that is to say with its upper surface inclined gradually upward from the
end that first passes under the overlapping part of the hook-like projection so that
when the lever is operated not only will the device draw the sashes together, but also
it will ensure the complete closing of both, its action tending to force down the lower
sash and raise the upper one.
Dated this 3rd day of Nov 1800
COMPLETE SPECIFICATION.
An Improved Fastener suitable for Securing Window-sashes and for
other purposes.
I, JOHN LAKEY, of 10 Clara Street, South Benwell, Newcastle-on-Tyne, in the
County of Northumberland, Pattern Maker, 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 has reference to a simple construction of fastener which can be easily
operated, will not be liable to get out of order, and will prevent rattling of windows
or of other articles such as doors or the like to which it may be applied.
In the accompanying drawings :
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page_text: r
Upon a suitable plate a adapted to be secured to the top of the lower sash bas
shown, is pivoted a lovore of the first order constructed with an oxtension & having
a curved eilge or surface at d eccentric to the axis or pivote of the lever, and a
recess or space at e*. Upon another suitable plate adapted to be fixed upon the
lower part of the upper sash g as shown, is a hook like projection that extends
through the recesses or space when the sashes are unfastened and with which the
extension d can by partial rotation of the lever e about its pivot be caused to engage.
The arrangement is such that when the lever is in the position shown in full lines
in Figs. 1 and 2 the hook like projection of the plate on the upper sash will be
located in the recess or space and will thus be free so that either sash can be
opened. By the rotation of the lever into the position shown in dotted lines in
Fig. 1, the eccentrically curved surface d will be brought into contact with a part of
the hook-like projection the part 4° of which will then overlap the extension d of
the lever, and as the movement of the lever e is continued in the same direction, the
curved eccentric surface d acting as a cam upon the hook-like projection, will
gradually draw and hold the two sashes together, whilst the part h* of the hook-like
projection will prevent opening of either sash. The part of the curved extension &
that is over-lapped by the hook-like projection h can be male wedge-like as shewn in
Fig. 3. that is to say with its upper surface inclined gradually upward from the end i
that first passes under the overlapping part of the projection h, so that when the
lever is operated not only will the device draw the sashes together, but it will also
ensure the complete closing of both, its action tending to force down the lower sush
and raise the upper one,
h
The projection may be placed to one side of the centre line B, B, passing through
the axis of the lever as shewn in Fig. 1, or in this line; but the point d' of the
lever segment should be so arranged as to pass over the line E E between the two
sishes when the fastener is in its closed attitude as shown in dotted lines. By this
means, the fastener cannot be moved into its open position by a knife or blade
passed between the sashes and acting against the outer curved surface of the
segment.
Fig. 4 is a front elevation showing the application of the fastener for securing a
hinged door, being the door to which the plate a carrying the lever c is fixed,
and ka door jamb to which the plate carrying the projection is fixed.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed 1 declare that what 1
claim is :-
1. A fastener for window sashes and other purposes comprising a lever a adaptod
to be applied to a window sash or other part to be secured and having an extension d
formed with a curved edge eccentric to the axis about which the said lever can turn
and a hook like projection adapted to be applied to the other window sash or part
to be secured and with which the said extension is adapted to engage when the lever
is turned, substantially as heroin described.
2. The improved fastener for window sashes and other purposes substantially as
herein described with reference to and shown in the drawings annexed.
Dated this 30th day of Santambor 1890