Improvements in Sash Fasteners.
Year: 1889

page_text: Date of Application, 2nd Aug., 1889
Complete Specification Left, 1st May, 1890-Accepted, 28th June, 1890
PROVISIONAL SPECIFICATION.
Improvements in Sash Fasteners.
I. ARTHUR ILLIDGE, of 16 Church Street, Wolverhampton in the County of
Stafford, brossfounder, do hereby declare the nature of this invention to he as
follows:-
This invention refers to that class of sash fasteners in which an arm pivotted to a
mounting fixed upon the upper sash is turned, in fastening. to engage with a mounting
fixed upon the lower sash, and of which the common fastener most frequently seen in
use is a type. Fastenings of this class are liable to be tampered with on account of the
facility they afford of the arm being opened back by a knife blade or other narrow
instrument inserted between the meeting rails of the sashes and pressed against the
arm.
Now, this invention has for its object simple and inexpensive means by which the
arm is securely prevented from being opened in the manner described; and such
object is attained, according to this invention, by forming out from the mounting for
the lower sash a projection which is considerably shorter than the base of the mounting
but is sufficiently long for the purpose hereinafter described, and which when the
fastening is fixed in place, passes across the slit or chink between the meeting rails.
This projection passes under the arm when closed, and thus securely protects it from
being pressed against by such an instrument as a knife blade, and the projection passes,
preferably, also along the side of the arm when closed, to protect it against being
opened by means of an instrument formed with a part to pass over the portion of the
projection which passes under the arm, and such projection passes also preferably over
the top of the arm when closed to present its boing pulled back by a hooked instrument
inserted between the sashes. It is preferred to form the mounting for the upper sash
with a recess or notch to receive the projection, rather than to set it back from the
edge of the rail to allow room for the projection, as in such former case, even if a
portion of the meeting rail be cut away for the purpose, a knife blade or similar
instrument cannot be inserted between the mountings in a position enabling it to be
pressed against the arm in a direction to open it.
In applying this invention to the ordinary or common sash fastener, a short length
of the base plate of the mounting on the lower sash is carried out, for its entiro depth,
towards the base plate of the opposite mounting, and such later plate is recessod or
notched for its entire depth to receive such part, and the inner or connected end of
the hook or keep (more especially the closed sido theroof) is also carried out over the
projection of the plate.
TAL: 11
1000
COMPLETE SPECIFICATION.
Improvements in Sash Fasteners
I, ARTHUR ILLIDGE, of 16 Church Street, Wolverhampton in the County of
Stafford, brassfounder, 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 refers to that class of sash fasteners in which an arm pivotted to a
mounting fixed upon one of the sashes is turned, in fastening, to engage with a
mounting fixed upon the other sash, and of which the common fastener most frequently
seen in use is a type. Fastenings of this class are liable to be tampered with, on

page_text: account of the facility they afford of the arm being opened back by a knife blade or
other nurrow instrument inserted between the meeting rails of the sashes and pressed
against the arm.
Now, this invention has for its object simple and inexpensive means by which the
arm is securely prevented from being opened in the manner described and such
object is attained, according to this invention, by forming out from the mounting for
the lower sash a projection, which is, preferably, considerably shorter than the base of
the mounting, but is sufficiently long for the purpose hereinafter described, and which
when the fastening is fixed in place, passes across the slit or chink between the meeting
rails. This projection passes under the arm when closed, and thus securely protects
it from being pressed against by such an instrument as a knife blade, and the projec-
tion passes also along the side of the arm when closed, to protect it against being
opened by means of an instrument formed with a part to pass over the portion of
the projection which passes under the arm, and such projection may pass also over
the top of the arm when closed to prevent its being pulled back by a hooked instru-
ment inserted between the sashos. It is preferred to form the mounting for the upper
sash with a recess or notch to receive the projection, rather than to set it back from
the edge of the tail to allow room for the projection, as in such former case, even if
a portion of the meeting rail be cnt away for the purpose, a knife blade or similar
instrument cannot easily be inserted between the mountings in a position enabling it
to be pressed against the arm in a direction to open it.
Figure 1 is a plan of an ordinary sash fastener having my invention applied thereto,
the arm being shewn by broken lines in its forward or fastened position; and figure 2
is a sectional plan of the mounting for the lower sash, the section being taken through
the side of the quadrant into which the arm is closed when fastened. A projection a
is formed out from the plato of the mounting A for the lower sash, and when the
mounting is fixed passes across the lit or joint between the meeting rails, and the side
of the quadrant projects also, as shown, so as to pass across such slit or joint,
and the top of the quadrant is, preferably, carried out flush with such
projection.
Figures Bard 4 are, respectively, a sectional plan, corresponding to figure 2, and
a section taken on line of figure 3, of a modification in which a hard steel plate cis
sunk within a recess in the plate of the mounting A to provent the projection a being
sawn through. A portion of the side of the quadrant is shown to bear upon the plate
to maintain it in position, the quadrant being fixed to the plate in the usual manner
by means of an oblong rivet, shewn by broken lines figure 4, formed with the
quadrant and passing through the plate.
Figures 5 and are, respectively, a plan and inside elevation of a sash fastener,
frequently employed, in which a dovetail notch d in the arm engages with a
quadrant 6 of correspondingly-shaped section. In this case the vertical ribe is carried
forward to the forward edge of the projection a.
Figure 7 is a plan of a sash fastener in which the arm B is carried by the mounting A
for the lower sash and is hooked, in fastening it, into the mounting for the upper
sash. In this case lugs ƒ and g stand up from the plate of the mounting A at each
end of the projection a.
In each of the modifications above described it is preferred that the projection a
shall enter a corresponding notch or recess in the front edge of the mounting for the
upper sash, as shewn.
Figures 8 and 9 are, respectively, a plan, with the mountings shewn apart from
one another, of a modification of my invention applied to an ordinary sash fastener,
and a section taken on line y y of figure 8, with the mountings shown in the relativo
position to one another they occupy when fixed. According to this modification of
my invention, the part of the projection a which passes below the arm is made of a
portion of the depth only of the plate from which it projects, and fits within a corre-
sponding recess a¹ formed for a part of the depth only in the plate of the mounting O
for the upper sashi. For additional security the side of the quadrant b may project
forwards, as shown at h, to pass when fixed into a corresponding recess in the

page_text: mounting C. In this case, of course, it is impossible to insert a knife blade or
other instrument up the side of the arm, even if some of the joinery is first
cut away.
It will be seen that the projection is of no real security unless it passes both
under and at the side of the arm as described, as if it passes at the side only an
instrument may be pushed up between itself and the arm, and the projection in such
case actually affords a fulcrum which materially assists the operation of forcing
open the arin, and if the projection passes simply under the arm the latter may be
opened by means of a bent instrument which passes over the projection. The
combined arrangement described, however, securely prevents the arm being opened
in either manner, and when the projection is carried over the arm also even a hooked
instrument passing over the arm cannot be used to move it back.
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 :-
1. A sash fastener of which the mounting for attachment to one sash as a projecting
portion which, when the mountings are fixed in place, passes across the slit or chink
between the meeting rails of the sashes and, also, both underneath and up the side
of the arm, when fastened (and preferably also over the top of the arm), substantially
as described for the purpose set forth.
2. A sash fustener of which the mounting for attachment to one sash has a projecting
portion which, when the mountings are fixed in place, passes across the slit or chink
between the meeting rails of the sashes, and into a recess formed therefor in the
opposite mounting, and also, both underneath and up the side of the arm, when
fastened (and preferably also over the top of the arm), substantially as described for
the purpose set forth.
3. A sash fastener of which the mounting for attachment to one sash has a projecting
portion which, when the mountings are fixed in place, passes across the slit or chink
between the meeting rails of the sashes, and, also, both underneath and up the side
of the arm, when fastened, and a hard steel plate to prevent the part of the projection
which passes under the arin from being sawn through, substantially as described for
the purpose set forth.
4. The several modifications according to which the arm of a sash fastener is
prevented from being opened from the outside, substantially as shown by the drawings
herewith.
Basel: L 1
2
11000