Improvements in Sash-fasteners.
Year: 1891

page_text: Date of Application, 19th May, 1891
Complete Specification Left, 19th Feb., 1892-Accepted, 19th Mar., 1892
PROVISIONAL SPECIFICATION.
Improvements in Sash-fasteners.
ARTHUR LAMPLOUGH Gentleman 2 Finsbury Square E.C. do hereby declare
the nature of this invention to be as follows:-
It consists of a flat strip of metal wrought or cast 4 inches more or less in length
& inch more or less in width & doubled or folded in the shape of an inverted T
a cavity being left in the upright portion & slightly sloped at back. In this cavity
a projecting angular shaped metal plate is suspended by a nail rivet or screw and
so balanced as to act automatically with the opening or closing of the window.
sashes to the top one of which the fastener is fixed by two or more screws. Fixed
by screws on the bottom sash & immediately opposite the fastener a cast or wrought
metal jaw or catch plate with raised shaped sides & square shaped back band
through which the upright portion of the fastener passes. This simple device
obviates the necessity of fastening the window by hand as in the downward action
of the sash in closing the catch plate forces back the projecting angular plate until
the sashes when it instantly shoots out & effectually fastens the sashes & at the
same time the square shaped band so fits as to press together the upright portion
of the fastener & the jaw or catch plate thus preventing the shaking or rattling of
the sashes. This fastener makes it impossible for the windows to be opened from
the outside by any tool or instrument.
Dated this 19th day of May 1891.
A. LAMPLOUGH.
Improvements in Sash-fasteners.
1, ARTHUR LAMPLOUGH, of 3 (late of No. 11) Colenso Road, Clapton Park, in
the County of Middlesex, Gentleman, de 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 invention relates to automatic sash fasteners which are not only cheap
in construction and efficient in use, but are practically burglar proof; and which
in addition to serving to fasten the sashes of windows prevent the said saslics
from rattling or shaking.
A sash fastener constructed in accordance with my invention consists essentially
of two pieces which for the purpose of this Specification I shall hereinafter refer
to as the bolt-piece and the ring-piece.
The bolt-piece consists essentially of two parts a support or standard andi a
bolt or gravity catch or catch plate. The ring-piece consists of a single piece
of metal soine what resembling a ring in shape so as to embrace the. bolt-piece
or a part thereof. These two pieces are placed on the sash rails in such manner
that when the window is closed the gravity catch falls slightly forward by gravity
so as to overhang the lower sash and so prevent its being pushed upwards whilst
the ring-piece embracing the bolt-piece hugs it close so as to press the two sashes
together and so not only prevent their rattling but also prevent the insertion of a
burglar's knife.
Having now described the generic features of my invention in general terms. I

page_text: shall proceed to describe my invention more in detail and for that purpose
refer to the accompanying sheets of drawings.
In these drawings
I shall
Figure 1 is a front elevation Figure 2 a plan and Figure 3 a side elevation of
one form of my complete sash fastener.
+
Figure 4 is also a side elevation with the bolt-piece and the ring-piece shown
separate as they are when the window is
open.
Figure 5 is a plan of the ring piece shown separately.
Figure 6 is a side elevation of a modified form of my bolt-piece and
Figure 7 a side elevation of the gravity catch therein.
In these figures similar letters of reference refer to similar parts.
Referring to Figures 1 to 5 inclusive A is the standard or support. It consists
of a single piece of metal, usually a casting of brass or iron, resembling an inverted
letter and with a vertical slot therein. In this slot hangs by the pin or rivet b
the gravity catch B. The catch B which consists of a flat plate is suspended so as
to normally hang forward as shown in Figures 3 and 4. In practice I generally
provide this plate with a head or projection as shown to prevent the plate coming
too far forward. The lower part a of the support A I cause to bulge outwards as
shown in Figures 2, 3 and 4 for a purpose hereinafter to be mentioned., C. is the
ring-piece or ring-plate usually a solid casting. The part e constitutes a flat plate
which prevents injury to the sash rail if the lower sash be pulled up to try to open
the window before the catch-plate B is pushed back. e¹ is an arched part or jaw
of the ring-piece C which serves to embrace the bolt-piede. D is the lower rail of
the upper sash and E the upper rail of the lower sash.
"
The action of iny invention will now be easily understood. Let us assume that
the window is open to a certain extent as shown in Figure 4 and that the window
is now to be closed by pulling down the lower sash. The ring piece will now
-embrace and surround the bolt-piece and when the jaw c¹ reaches the bulging
part a, the ring-piece will begin to hug the bolt-piece, and will hug it the more
tightly the further it descends. At the same time the catch-plate will be pressed
backwards by the part c of the ring-piece until the said catch-plate occupies the
position shown by the dotted lines in Figure 3. When the lower sash has reached
the end of its downward course the. catch-plate will be free to fall forwards into
the position shown in full lines in Figure 3 and the ring-piece will tightly hug the
support of the bolt piece so as to press the two sashes closely together. In this,
the closed, position, it will be seen that the lower sash cannot be raised from the
outside as any exertion to effect this would simply cause c to press ineffectually
against the catch-plate.B, whilst the two sashes are so closely pressed together
'that they cannot shake or rattle and will not admit a knife or tool between them.
To open the window it is only necessary to press back the catch-plate with the
finger when the window can be easily opened by raising the lower sash.
Figure 6 is a modified form of bolt-piece. It differs from that already described
in' that instead of its standard or support A having a bulging part a the whole
štandard is made to taper backwards so that an inclined plane extends from the top
to the base. This it will be seen is a construction equivalent to that just described.
The gravity-catch shown in Figure 7 differs from that shown in the previous
figures in that instead of having a head to prevent movement too far forward it
has a notch' cut on its lower edge which notch comes in contact with the part
of the ring-piece when the window is closed.
² are two side wings'springing upwards from the ring-piece which I sometimes
"find it advantageous to employ though they are not necessary. Besides serving as
'an additional protection against a burglar's tool they are convenient for raising the
'lower sash. For this purpose the thumb and second finger may be placed under
the turned over parts of these wings whilst the first finger presses the catch-plate
backwards. In conjunction with the ring-piece as shown in Figure 5 I prefer in
practice to employ that form of bolt-piece which is shown in Figure 6.

page_text: Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. The arrangement and combination of parts constituting the form of sash
fastener shown in Figures 1 to 4 inclusive.
2. The form of bolt piece shown in Figures 1 to 4 inclusive.
3. The form of ring piece shown in Figure 5 and either with or without the
wing pieces c³.
4. The form of bolt-piece shown in Figure 6.
5. The form of support shown in Figures 1 to 4 inclusive.
6. The form of support shown in Figure 6.
7. The form of bolt or catch-plate shown in Figure 7.
ARTHUR LAMPLOUGH.
Per J. G. Lorrain, M. Inst. E.E., M. Inst. M.E.,
Norfolk House, Norfolk Street, London, W.C., Chartered Patent Agent.