Improvements in Sash Fastenings.
Year: 1893

page_text: Date of Application, 24th Apr., 1893
Complete Specification Left, 24th Jan., 1894-Accepted, 24th Feb., 1894.
Improvements in Sash Fastenings.
I, THOMAS JOHN GAWTHORP, of 16 Long Acre, London, W.C. Artificer
in Brass and Iron, do hereby declare the nature of this invention to be as
follows:-
This my invention relates to an improved sash fastening and the object of my
said invention is to provide a fastening for sliding windows or other like con-
structions, which shall be simple in construction and at the same time effectually
prevent the unfastening of the same from the outside of the window by means of a
knife blade or other instrument.
To this end my improved sash fastening consists of two parts, one attached to
the bottom rail of the upper sash and the other attached to the top rail of the
lower sash.
The part for the upper sash consists of a double-plated bracket, the lower
horizontal plate of which is screwed to the upper sash and the upper horizontal
plate is cut away to a triangular shape, and forms a guard for the pivotted sash
lever to be hereinafter described.
Between the upper and lower plates I provide a trough shaped piece which
rotates at one end on a pin fixed between the aforesaid plates, at the outer end of
which is a tongue piece bent downwards.. This tongue piece travels in slots made
in the plates of the sash fastening, which are screwed to the sashes of the window.
These slots are of such a shape that the tongue piece in moving from the opening
to the closing position causes the sashes to be drawn together, and likewise stops
the fastening when in closed position. Into the trough shaped piece I place a
lever, provided at the outer end with a knob or handle in the same manner as an
ordinary sash fastening, and the inner end of which is secured by the pin passing
through it and the trough shaped piece, and upon which it rotates with the piece.
The lever projects beyond the trough and is fitted loosely so as to be free to move
in a vertical position, the upper guard plate of the sash bracket aforesaid keeping
it from being lifted too far.
The part for the lower sash consists of a plate for fixing on to the sash, with the
slot for receiving the tongue piece of the rotating trough shaped piece aforesaid,
on the outer edge of which I provide a radial tapering lug which tapers from the
inner edge of the plate to a sufficient distance to clear the lever when in closing
position.
When the sash fastening is moved to its closing position, the lever sliding over
the tapering lug is raised in the trough shaped piece, but immediately it clears the
lug when at right angles to the line of the window sash, it falls and thus is locked
in its closed position and cannot be moved back till the lever is raised from the
inside and passed over the tapering lug.
Dated this 24th day of April 1893.
REGINALD W. BARKER,
Applicant's Agent.

page_text: . Improvements in Sash Fastenings.
1, THOMAS JOHN GAWTHORP, of 16 Long Acre, London, W.C., Artificer
in Brass and Iron, 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 :-
This my invention relates to an improved sash fastening and the object of my
said invention is to provide a fastening for sliding windows or other like con-
structions, which shall be simple in construction and at the same time effectually
prevent the unfastening of the same from the outside of the window by means of a
knife blade or other instrument.
To this end my improved sash fastening consists of two parts, one attached to
the bottom rail of the upper sash and the other attached to the top rail of the
lower sash.
The part for the upper sash consists of a double-plated bracket, the lower
horizontal plate of which is screwed to the upper sash and the upper horizontal
plate is cut away to a triangular shape, and forms a guard for the pivotted sash
lever to be hereinafter described.
Between the upper and lower plates I provide a trough shaped piece which
rotates at one end on a pin fixed between the aforesaid plates, at the outer end of
which is a tongue piece bent downwards. This tongue piece travels in slots made
in the plates of the sash fastening, which are screwed to the sashes of the window.
These slots are of such a shape that the tongue piece in moving from the opening
to the closing position causes the sashes to be drawn together and likewise stops
the fastening when in a closed position. Into the trough shaped piece I place a
lever, provided at the outer end with a knob or handle in the same manner as an
ordinary sash fastening, and the inner end of which is secured by the pin passing
through it and the trough shaped piece, and upon which it rotates with the piece.
The lever projects beyond the trough and is fitted loosely so as to be free to move
in a vertical position, the upper guard plate of the sash bracket aforesaid keeping
it from being lifted too far.
The part for the lower sash consists of a plate for fixing on to the sash, with the
slot for receiving the tongue piece of the rotating trough shaped piece aforesaid,
on the outer edge of which I provide a radial tapering lug which tapers from the
inner edge of the plate to a sufficient distance to clear the lever when in closing
position.
When the sash fastening is moved to its closing position, the lever sliding over
the tapering lug is raised in the trough shaped piece, but immediately it clears the
lug when at right angles to the line of the window sash, it falls and thus is locked
in its closed position and cannot be moved back till the lever is raised from the
inside and passed over the tapering lug.
In order that my invention may be clearly understood, I will describe the same
with reference to the accompanying drawings-
Fig. 1 is a perspective view of the sash fastening when open; and Fig. 2 when
closed.
Fig. 3 represents a play of the fastening, Fig. 4 a front elevation of the latch
part of the fastening, and Fig. 5 a side elevation of the same.
The same letters refer to the same parts in the several views.
A is the bottom part of the upper sash of a window, and B the upper part of the
lower sash. C is the latch of the sash fastening, which is screwed to the lower
part of the upper sash of the window, the handle and lever of which slides over the
plate D screwed to the lower sash having a radial tapering lug H cast on it
upper surface. E is an upper horizontal plate cut away to a triangular shape

page_text: forming part of the double plated bracket C. F is a trough shaped piece rotating
on the pin G fixed between the horizontal plates, having at its outer end a small
tongue J, which slides in the slots K K of the plates.
These slots are curved to a radius struck from a centre slightly forward of the
fulcrum pin G, so that the lever and handle with the tongue J in moving from the
opening to the closing position, cause the sashes to be drawn together, and likewise
provide a stop for the fastening when in closed position. L is a lever which lies in
the trough having a knob or handle M at the outer end, the inner end having a
hole through which the pin G passes, which hole is made sufficiently large to allow
the lever freedom to be moved slightly in a vertical direction, the upper guard
plate of the bracket aforesaid keeping it from being lifted beyond the required
distance.
In fastening the sashes of the window, the lever L and handle M is moved from
its open position as shown in Fig. 1, and slides over the tapered lug H, which
causes it to be raised slightly, but immediately it clears the lug it drops, and thus
is locked in position and cannot be moved unless it is raised from the inside of the
window and passed back over the tapering lug.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
The provision of a sash fastening, with self locking lever sliding over a tapering
lug, substantially as and for the purpose herein described and illustrated by the
accompanying drawings.
Dated this 24th day of January 1894
REGINALD W. BARKER,
Applicant's Agent.