An Improved Self Acting Window Fastener.
Year: 1894

page_text: Date of App ication, 23rd Nov., 1891
Complete Specification Left, 23rd Aug., 1895-Accepted, 28th Sept., 1895
PROVISIONAL SPECIFICATION.
An Improved Self Acting Window Fastener.
FRANK DE LAISTRE BANTING Jeweller 60 Porchester Road, Westbourne
Park. I do hereby declare the nature of this invention to be as follows:-
A window fastener to close automatically a window.
A person requiring a window open has merely to gently press or draw back a
centre piece of metal which is pivoted between two upright pieces of metal which
admits of the window being thrown up. Upon shutting the window down it
becomes automatically fastened. This centre piece of metal is arranged with a kind
of pivot hole or slot which admits of its being displaced by a slight touch to admit
the window sashes to pass freely up or down. It is also arranged with a second
pivot hole to keep it in position.
Dated this 23rd day of November 1894.
FRANK DE LAISTRE BANTING.
An Improved Self Acting Window Fastener.
I, FRANK DE LAISTRE BANTING of 60 Porchester Road, Westbourne Park in
the County of London, Jeweller, 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 invention relates to a window fastener for sliding window sashes adapted to
fasten automatically when the window is closed.
According to my invention I employ a block or tumbler supported upon a pivot
The said block is
pin in brackets on the meeting rail of the upper window sash.
provided with a hole or slot at its upper end through which passes the said pivot
pin, and with a slot at its lower end through which passes a pin on the brackets
for limiting the movement of the lower end of the block, this arrangement allowing
the block to be moved so that either its upper end or its lower end projects in the
way of the lower sash. The block is weighted so as to cause it to assume either
of the said positions when partly moved.
In order that the invention may be clearly understood, reference is had to the
annexed drawing, in which,
Figure 1 is a front view of a portion of the meeting rails of a sliding sash
window with my improved window fastener applied thereto.
Figure 2 is a plan of the same.
Figure 3 is a vertical section on the line a
Figure 1 and
Tigure 4 is a similar view to Figure 3 but shewing the pivotted block or tumbler
of the fastener in a different position.
a is the pivotted block or tumbler and 6 is the pivot pin on which it is supported
in the brackets c c attached by the base d to the meeting rail e of the top sash.
fis the slot (or a hole may be used) to engage the pin, the said slot being fortred
in the upper end of the block a. g is the slot in the lower end of the block a

page_text: through which slot passes the pin / also carried by the brackets c c. i is a striking
plate attached to the meeting rail of the lower sash and serving to operate the block
or tumbler a when the sashes are moved as hereinafter described. The tumbler a
is weighted as at a' so that when partly moved upon the pins b and h from the
position shewn in Figure 3 it will fall over into the position shewn in Figure 4
and vice versa.
When in the position shewn in Figure 3, the front lower portion a²
of the block a will project in the way of the striking plate i and thus prevent
either of the sashes being moved. When it is required to open either sash the
tumbler a must be moved or caused to fall over into the position on the pins b
and shewn in Fig. 4, so as to cause the rounded upper end a³ of the tumbler to
project in the path of the striking plate the weighted portion a' maintaining it in
this position. If, now, either sash be opened, the surface of the striking plate i
in passing will impinge against the projecting upper end a³ and cause the tumbler a
to fall back into the position shewn in Figure 3. Upon closing the sash the
inclined edge 2 of the striking plate will in passing impinge against the inclined
surface a' of the tumbler a and cause the latter to swing partly back upon the pivot
pin b, the said tumbler again swinging forward, when the sash is closed, with its
lower portion a projecting in the way of the striking plate.
By moving the tumbler a into the position shewn in Figure 4 and placing a pin
between the end of the slot fand the face of the brackets c c as indicated by the
dotted circle at j, either sash can be moved to a limited extent, that is to say, until
the striking plate comes into contact with the portion a³ of the tumbler. This
arrangement allows a window to be partly open for the purpose of ventilation and
yet be secure against further opening by persons outside.
When using
a hole in the block a to engage the pin b instead of the slot, f, the
block a will pivot thereon, but I do not prefer this arrangement as I find the block
requires to be made considerably longer in order to get the same projection of the
ends in the way of the, striking-plate as when. the slot is used.
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. A window fastener for sliding window sashes consisting of a block or tumbler
supported or pivotted upon the upper sash in such a manner that either its lower
or upper end can be moved into the path of the lower sash and so weighted as to
cause the block to assume either of these positions when partly moved, substantially
as described.
2. The improved window fastener for sliding window sashes herein before
described and illustrated in the accompanying drawing, and operating as set
forth.
Dated this 21st day of August 1895.
FRANK DE LAISTRE BANTING.