Improvements in Window-sash Fasteners.
Year: 1896

page_text: Date of Application, 11th Feb., 1896
Complete Specification Left, 10th Mar., 1896-Accepted, 11th Apr., 1896
Improvements in Window-sash Fasteners.
We CHARLES MAITLAND Gentleman and WILLIAM GEORGE THOMAS,
Schoolmaster both of 33 Orchard Road, Kingston-on-Thames in the County of
Surrey do hereby declare the nature of this invention to be as follows:-
Our invention relates to improvements in window-sash fasteners and has for its
object to provide simple and efficient means for securely fastening the sashes so as
to prevent rattling and which cannot be tampered with from the outside for the
purpose of opening the window.
For this purpose we pivot an arm or lever, provided with a knob or handle, to a
plate secured to the meeting-rail of the upper sash, and to the meeting-rail of the
lower sash we also fix another plate, provided at its centre with a screw tapped
hole.
The knob or handle is fitted so as to turn freely in a perforation at the end of
the arm or lever, and its lower end or spindle is formed with a coarse-threaded-
screw for engaging with the screw-threaded hole formed in the plate fixed to the
lower sash.
In order to fasten the sashes the arm or lever is turned so as to bring the screwed
end of the knob above the screw threaded hole in the lower sash; the knob is then
partially turned thereby engaging its screw with the said hole and tightly fixing
the arm or lever so as to form a rigid connection between the two sashes and
preventing rattling.
By means of our invention we dispense with the use of springs or other devices
liable to get out of order and it is impossible to turn the lever or fastening by the
insertion of any tool or instrument between the sashes.
As our improvements are capable of some slight modification without departing
from the principle thereof we do not restrict ourselves to the precise form or
placement of the parts thereof.
Dated this 11th day of February 1896.
J. B. FLEURET,
5 Hatton Garden, London, Agent for the Applicants.
We CHARLES MAITLAND, Gentleman and WILLIAM GEORGE THOMAS,
Schoolmaster both of 33 Orchard Road, Kingston-on-Thames in the County of
Surrey do hereby declare the nature of our invention and in what manner the
same is to be performed to be particularly described and ascertained in and by
the following statement ;-
Our invention relates to improvements in window-sash fasteners and has for its
object to provide means for easily and securely fastening the sashes together so

page_text: as to prevent rattling, the said fasteners being so arranged that they cannot be
tampered with from the outside for the purpose of opening the window.
According to our invention we pivot an arm or lever to a plate secured to the
meeting-rail of the upper sash, and to the meeting rail of the lower sash we also fix
another plate provided at its centre with a screw-tapped hole. This arm or lever
is provided with a knob or handle fitted so as to turn freely in a hole or perforation
at its free, end, the spindle of the said knob or handle, passing through the
perforation, being formed at its lower end with a coarse threaded screw which is
caused to engage with the screw-threaded hole formed in the plate on the lower
sash, for the purpose of locking the sashes together.
By means of our invention we dispense with the use of springs or other devices
liable to get out of order, the arm or lever being simply turned upon its pivot in
order to lock or unlock the sashes by means of the screw-spindled knob or handle
as aforesaid.
And in order to clearly understand our said invention we will describe the
same with reference to the accompanying sheet of drawings in which
Fig. 1 is a front view of our improved fastener applied to window sashes, the
said fastener being shown in its unlocked position and Figure 2 is a plan of the same.
Figure 3 is a cross section at right angles to Figure 1 with the parts in their
locked position.
a represents the meeting rail of the upper or outer sash of a window and b is the
meeting rail of the lower or inner sash. To the meeting-rail a we secure by means
of screws, a plate e formed with an upward extension ef and a bent over portion e2
for carrying a headed pin d secured to the plate c.
Upon the pin d we pivot, between the plate c and the part c 2 the arm or lever e
formed at its free end with a hole or perforation el opening into a recess or extended
opening 2 this end of the arm or lever we provide with a knob or handle/ formed
with a spindle or shank fitting loosely in the hole e', and provided at its lower end
with a coarse-threaded screw f2.
To the upper surface of the meeting rail 6 we secure a plate g formed at its
centre with a screw-tapped hole ' of similar thread to the screw f2.
f
In order to lock the sashes together we turn the arm or lever e from the
positions shown in Figures 1 & 2 into that shown in Figure 3, thereby bringing
the screw 2 of the knob f above the tapped hole g. The knob is then
turned until the screw 2 is tightly engaged with the screw threaded hole g',
thus forming a rigid connection between the sashes a and b and preventing any
movement or rattling of the same.
When required to unlock the sashes the knob is unscrewed causing the
screw 2 to be drawn up into the recess e2 clear of the plate 9 and thus
permitting of the arm or levere being turned back into the position shown in
Figures 1 and 2 out of contact with the sash b.
By means of our invention it will be seen that it is impossible to open the
window from the outside by forcing an instrument between the sashes by reason
of the rigid connection formed between the sashes and the arm or lever e and screw
knob or handle f.
Having now particularly described and ascertained the nature of my said inven-
tion I declare that what I claim is ;-
1. In window sash fasteners the employment of an arm or lever pivoted to the
upper sash and provided with a screw knob or handle for engaging with a screw-
threaded hole formed in a plate attached to the lower sash substantially as described
and for the purpose specified.
2. In window sash fasteners the combination with the plate e secured to the
sash a, of the pin d, pivoted arm or lever e formed with a perforation el and
recess, knob or handle f provided with a spindle f¹, and a screw f2, and a
plate g secured to the sash 6 and provided with a screw-tapped hole g', substantially
as described and for the purposes specified.

page_text: 3. The improved window-sash fastener substantially as described and shown in
the drawings.
Dated this 9th day of March 1896.
J. B. FLEURET,
5 Hatton Garden, London, Agent for the Applicants.