AN IMPROVED WINDOW SASH FASTENER
Year: 1878

page_text: LETTERS PATENT to Richard Evered, senior, of Drury Lane, in the County of
Middlesex, Gentleman, and George Clarke, of Devonshire Street, Birmingham,
in the County of Warwick, Brassfounder, for the Invention of "AN IMPROVED
WINDOW SASH FASTENER."
Sealed the 10th December 1878, and dated the 14th June 1878.
PROVISIONAL SPECIFICATION left by the said Richard Evered and George
Clarke at the Office of the Commissioners of Patents on the 14th June 1878.
RICHARD EVERED, senior, of Drury Lane, in the County of Middlesex, Gentleman,
and GEORGE CLARKE, of Devonshire Street Birmingham, in the County of Warwick,
Brassfounder. "AN IMPROVED WINDOW SASH FASTENER."
Our Invention relates to an improved sash fastener, which is very simple in its
construction and operation, while, at the same time, it will lock or secure a window
more tightly and safely than ordinary sash fasteners.
The said improved fastener has an adjustable or movable arm or lever, which is
jointed to a plate fixed on one of the sashes, and which engages with a piece or
plate fixed on the other sash of the window.
And our said Invention consists in the peculiar manner of providing the joint pin
of the said arm or lever with a slotted connection to one plate, so that the said arm
or lever will not only turn on the said pin but is capable of being drawn outward
from the joint to permit it to engage with and be disengaged from a recess in the
otber plate.
It also consists in combining with the said arm or lever a spring, placed outside
of the boss or central portion of the same, and acting to press the said arm inward
or toward its joint.
The aforesaid plates and the arm or lever may be made of brass or other suitable
metal.
The plates are attached by screws to the top bar of one sash and the botton bar
of the other sash in the usual manner.

page_text: The plate to which the said arm or lever is jointed may have at the back or
inner side thereof an upwardly projecting, portion, which has at its upper edge a
flange, between which and the bottom flat portion of the plate the said arm or lever
is arranged, and in the said flange and bottom flat portion we form elongated
apertures or slots which extend partially across from the back to the front of the
plate, and through which the said pin extends, and in which it is fitted to move
freely to and fro.
The aforesaid spring is a flat piece of steel or other suitable metal secured by one
end to the back portion of the plate, and bearing with its other end upon the boss
of the said arm or lever, which has two flat faces formed on it to correspond with
the two portions of the lever when the window is fastened and unfastened. This
spring not only serves the purpose of holding the said lever in these positions, but
also exerts upon it the necessary inward pressure to lock the sashes together, as
will be understood from the following description :-
The said lever has at its outer extremity a hook or flange, which projects down-
ward and inward, and this hooked portion of the said lever works over a curved
piece which has in it the notch or recess with which the said lever engages when
the window is fastened.
In fastening the window the said lever, as its booked end passes over this
curved piece, overcomes the pressure of the spring, and the end of the lever thereby
passes over the edge of the said piece till it reaches the said notch or recess, into
which it enters, thereby locking the sashes and pressing them very tightly and
closely together.
For unfastening the window, the said lever is pulled forward against the pressure
of the spring to release the hook from the said recess, and the said lever can then be
turned back, leaving the sashes free to slide up and down in the usual manner.
If desired, the slot may be formed in the arm or lever instead of in the plate, as
above described.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Richard Evered, senior, and George Clarke in the Great Seal Patent
Office on the 13th December 1878.
RICHARD EVERED, senior, of Drury Lane, in the County of Middlesex, Gentleman,
and GEORGE CLARKE, of Devonshire Street, Birmingham, in the County of Warwick,
Brassfounder. "AN IMPROVED WINDOW SASH FASTENER."
Our Invention relates to an improved sash fastener, which is very simple in its,
construction and operation, while, at the same time, it will lock or secure a window.
more tightly and safely than ordinary sash fasteners.
The said improved fastener, las an adjustable or movable arm or lever jointed or,
connected to a plate fixed on one sash, and arranged to engage with a plate or piece
fixed on the other sash of the window, as herein-after specified.
And our said Invention consists in the peculiar manner of providing the joint pin.
of the said arm or lever with a slotted connection to one plate, so that the said arm
or lever will not only turn on the said pin but is capable of being drawn outward
from the joint to permit it to engage with and be disengaged from a notch or recess
in the other plate.
It also consists in combining with the said arm or lever a spring placed outside
of the boss or central portion of the same, and acting to press the said arm inward
or toward its joint.
Our Invention is illustrated in the accompanying Drawing, in which―
Figure 1 is a plan of the said fastener shewing the same locked; Figure 2 is a
plan showing it unlocked.
Figure 3 is a plan or top view with part of the said fastener detached.
Figure 4 is a section on the line x, x, Figure 1.
Figure 5 is a plan partly in section, showing a modification of the said fastener;
Figure 6 is a section on the line y, y, Figure 5.
Like letters indicate corresponding parts throughout the Drawing.
A, A, are portions of the top and bottom sashes of a window to which the said.
fastener is applied; a, b, are the metal plates forming part of the said fastener, and
secured to the said sashes; c is the lever; d is the pin on which it turns; e is the
spring.
The aforesaid plates a, b, and the arm or lever c may be made of brass or other
suitable metal.
The plate a is attached to the bottom bar of the upper sash, and the plate b is
attached to the top bar of the lower sash by screws in the usual manner.
The plate a to which the said arm or lever c is jointed by the pin d has at the
back or outer side thereof an upwardly projecting portion a¹, at whose upper edge
is formed a flange a, between which and the bottom flat portion of the plate a the
pivotted end of the said arm or lever is arranged. The manner in which we con-
nect the said lever with the pin d, so that it will turn thereon while having a
capability of endwise adjustment, may be readily understood from the following
description:-In the said flange and bottom flat portion of the plate a we form
elongated apertures or slots f, which extend partially across from the back to the
front of the plate, as shewn in Figure 4, and through which the pin d extends, and
the said pin is fitted to move freely to and fro in the said slots, from end to end of
the same. The said pin has a head d', and is rivetted over a washer d² at the
underside of the plate a to keep it in place without impeding its movement in the
slots f; or it may be so kept in place by any other suitable means.
The aforesaid spring e is a flat piece of steel or other suitable metal, secured by
its end e¹ to the back portion a¹ of the plate a, and bearing at its other end e* upon
the boss c¹ of the arm or lever c, which boss has two flat faces formed on it to
correspond with the two positions of the lever when the window is fastened and
unfastened. This spring not only serves the purpose of holding the said lever in
:

page_text: these positions, but also exerts upon it the necessary inward pressure to lock the
sashes together, as will be understood from the following description:-
--
The said lever at its outer extremity is curved downward, and has on it a hook
or tooth c³ which projects inward under the flange b¹ formed on the plate b. The
curved part c4 of the lever works over the said flange b¹; the latter has in it the
notch or recess b2 with which the said lever engages when the window is fastened,
as shown in Figures 1 and 4.
The form of this lever may be modified by making the part c* straight or flat.
In fastening the window, the lever c is turned on its pin, and its hooked
end passes over the curved flange, while the outer edge of the latter acts as a
cam, and overcomes the pressure of the spring e, and the said curved or hooked end
of the lever is forced outward by the said edge of the flange till it reaches the notch
or recess 62, into which it is drawn by the spring, thereby locking the sashes and
pressing them very tightly and closely together. We sometimes form a hole
through the plate under the said notch, as shewn at b*, and make the hook long
enough to enter the same.
In unfastening the window, the lever c is pulled forward against the pressure of
the spring to release the hook from the recess 62, and the said lever can then be
turned back into the position shewn in Figure 2, leaving the sashes free to slide up
and down in the usual manner.
In the modification of our Invention, illustrated in Figures 5 and 6, the pin d is
fixed immovably in the top and bottom portions of the plate a, and provision is
made for the endwise movement of the lever c by forming a slot c³ in the said lever,
as shewn.
In other respects this form of my Invention is similar or substantially so to the
device shewn in Figures 1, 2, 3, 4 of the Drawing.
The lever c is provided with a knob or handle to facilitate its movement or
adjustment.
Having thus fully described our said Invention and the manner of performing the
same, we wish it understood that we claim a sash fastener which has two plates or
parts to be secured to the two sashes of a window, and which has a lever attached
by a slotted connection to one of these plates, and formed and arranged to engage
with a curved and notched flange on the other plate, and arranged in combination
with a spring to operate as and for the purpose specified.
In witness whereof, I, the said Richard Evered, for myself and on behalf of
the said George Clarke, have hereunto set my hand and seal, this Twelfth
day of December, in the year of our Lord One thousand eight hundred and
seventy-eight.
RICHARD EVERED. (L.S.)