Year: 1898

page_text: Date of Application, 26th July, 1898-Accepted, 17th Sept., 1898
I, HENRY HARRIS LAKE, of the Firm of Haseltine, Lake & Co., Patent Agents,
45, Southampton Buildings, in the County of Middlesex, do hereby declare
the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement —
This invention relates to an improvement in sash-fasteners, the object being to
produce a simple, compact, convenient and effective device composed of few parts,
adapted to be produced at a low cost for manufacture, and constructed with par-
ticular reference to lifting the upper sash into position for locking it before
drawing the two sashes together for that purpose, and also constructed with
reference to avoiding the disfigurement of the upper sash by the lifting of the
lower sash with the lever in a partially-retired position.
With these ends in view, the invention consists in a sash-fastener having certain
details of construction and combinations of parts, as will be hereinafter described,
and pointed out in the claims.
Referring to the accompanying drawings forming part of this specification.
Figure 1 represents a plan view of a sash-fastener constructed in accordance with
this invention with its locking lever shown in its unlocked position ;
Figure 2, a similar view with the locking-lever shown in its locked position;
Figure 3, a reverse plan view of the chainber case-plate and locking-lever;
Figure 4, a view in front elevation of the case-plate and locking-lever;
Figure 5, a view in front elevation of the keeper and its finger;
Figure 6 a sectional view of the case-plate and locking-lever on the line a-b
of Figure 3.
In carrying out the invention a locking lever is employed, having a finger-piece A
and an operating-flange A¹, which for convenience of description will be spoken of as
having a nose A2, a winding upper lifting-face A³, and an inwardly-bevelled drawing
edge A', into which the inner portion of the said face merges. This lever is located
in a horizontal plane and pivotally attached, by means of a vertical pivot B, to a
chambered case-plate C, provided at its ends with screw-holes C¹ C¹ for its attachment
to the upper rail of the lower sash. The said lever has a depending hub entering the
said plate, receiving the pivot, and constructed with flattened opposite faces a a, which
are respectively engaged by straight flat sheet-metal springs D D, located within the
chamber of the case and coacting with the hub of the lever to hold the same in its
opened and closed positions. The said springs are retained in place, as herein shown,

page_text: by means of a flat washer or disc D¹, engaging with their lower edges, and
applied to the lower end of the pivot B, the upper end of which is headed.
The keeper E of the device is constructed at its ends with screw-holes E¹ E¹ for the
reception of the screws by means of which it is attached to the upper face of the
lower rail of the upper sash. It is also constructed with a cammed litting and draw-
ing finger E2, located to the left of its longitudinal center and extending forward,
inward, and downward, its longitudinal axis being pitched at a sharp angle with
reference to the longitudinal axis of the keeper. The said springs D D coact with
the operating-flange A¹ of the locking-lever and the drawing-finger A2 of the keeper in
automatically unlocking or locking the sashes in case the lever is not manually thrown
fully into its locked or unlocked positions. Thus, supposing the lever were thrown partly
around into position to lock the sashes, then the power of the springs being still
exerted on the lever would tend to work it into its closed position in case there was
any play between the operating-face of the lever and the finger, caused, let us say,
by the rattling of the windows. On the other hand, if the lever were only thrown
partly into its open position in unlocking the windows, the tension. of the springs still
being upon, it, they, would exert a constant effort to work it around into its full open
position in case the friction between the lever and finger were relieved, as by the
rattling of the windows or otherwise. It will thus be seen that under this peculiar con-
struction the springs coact with the cam-face of the lever and the finger co-operating
therewith.
In using this improved device the two members of it stand related to each other, as
shown in Fig. 1, when the two sashes are in their closed positions, but unlocked.
Now when the locking-lever is turned in the direction indicated by the arrow a¹ of
the said figure, the nose A2 of its operating-flange will be shot under the base of the
finger E2 of the keeper, and be followed by the outer end of the flat winding lifting-
face A³: If now the upper sash is not in its fully-elevated position, the said face and
finger will combine to lift the said sash until the keeper and chambered case-plate
are brought into the same horizontal plane. Then, and, not until then, will the drawing
inwardly-bevelled edge A of the operating-flange of the lever engage with the
downwardly-bent end of the finger E2 and coact with the. same to draw the keeper.
and plate, together, this drawing action continuing until the lever has been turned
into.its fully-closed position, in which, it is shown in Fig. 2. It is to be clearly under-
stood, however, that the action of the winding lifting-face of the operating-flange of
the lever does not shift the inwardly-beveled drawing edge there of until the two plates
have been brought into the same horizontal plane, so, that the drawing action of the
device does not begin, until after the lifting action thereof has been completed. This
is of obvious advantage, as it prevents binding, and thus insures a uniformly easy and
correct action, of the device.
It will be, observed by reference to Fig. 1 that when the lever is in its open or un-
locked position, its nose A2 stands,directly opposite the finger E2 of the keeper, for the
reason, that the saine is located to one side of the longitudinal center thereof. On
account of this construction the lower sash cannot be raised. until the locking-lever is
thrown into its fully-retired. position, for, otherwise, the nose of the lever would
collide with the finger of the keeper; but when the lever is,in.its. fully-closed position,
its nose lies within the edge of, the, chambered case-plate, and therefore is so retired
that it cannot engage with the lower rail of the upper sash and deface the same.in
raising and lowering the lower, sash.
Having now particularly described and ascertained the nature of my said inven
tion, and in what manner the same is to be performed, as communicated to me
by my foreign correspondents, I declare that what I claim is :-
In a sash-fastener, the, combination with a chambered case-plate, of a horizontally
arranged lever pivoted thereto and: constructed with a downwardly-projecting hub
entering the chamber thereof, and also constructed with an operating-flange com-
prising, a flat winding, lifting-face, and an inwardly-beveled drawing edge
into which the inner portion of the said face merges, a keeper constructed

page_text: with a lifting and drawing finger successively co-acting with the said face, an
edge to first lift the upper sash, and then, to draw the two sashes together; and
one or more springs located within the chamber of the case-plate and coacting with
the hub of the lever for automatically completing the movement of the same into
its locked and unlocked positions, and in case the lever is not free to move into its
fully-closed position, urging its drawing edge against the said finger and taking
advantage of any rattling of the sashes, to move the said edge under the finger until
the locked position of the lever is reached.
Dated this orth
T
1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.