SH FASTENERSSTEN
Year: 1872

page_text: LETTERS PATENT to William Stuart, of New Hampton Road, Wol-
verhampton, in the County of Stafford, Lock Manufacturer, for the
Invention of 16 Tunawwaymo ™V Wrynow SASH FASTENERS.
Invention of
WIwnow SASH FASTENERS.
434
Sealed the 19th November 1872, and dated the 12th June 1872.
PROVISIONAL SPECIFICATION left by William Stuart at the Office of
the Commissioners of Patents, with his Petition, on the 12th
June 1872.
I, WILLIAM STUART, of New Hampton Road, Wolverhampton, in
the County of Stafford, Lock Manufacturer, do hereby declare the nature
of the said Invention for "IMPROVEMENTS IN WINDOW SASH FASTENERS," to
be as follows:-
The object of this Invention is to construct window sash fasteners in
such a manner as to prevent the arm of the fastener being forced back
by an instrument introduced through the space between the sashes.
For this purpose I place below the arm of the fastener a thin metal
plate capable of turning on a pin carried by the arm near its outer end,

page_text: This plate, when the fastener is closed extends over and beyond the
space between the sashes, and where it passes across this space it is bent
upwards so as to stand up at that side, of the arm which would have to
be pressed upon to open the fastener, and a spring extends from it along
this side of the arm and bears against the arm towards its outer end;
the bent up portion of the plate is by this spring held away from the
side of the arm. When the plate is in this position the arm of the
fastener can be turned back in the ordinary manner by the knob at its
cnd, but if it is attempted to force back the arm by any instrument passed
up through the space between the sashes the instrument comes against
the plate and turns it upon its pin or axis. When the position of the
plate is thus shifted its end comes opposite to a fixed stud, and thereby
the arm is locked and prevented from being turned back.
Another way in which a stud or stop on the fixed plate which carries
the arm of the fastener may be employed to prevent the arm being
turned back by an instrument passed up between the sashes, is to form
a slot along the under side of the arm to receive a sliding bolt acted
upon by a coiled spring in'a hollow at the outer end of the arm. When
the arm of the sash fastener is turned into a position at right angles to
the plate which carries it, the end of the sliding bolt comes against a
stud on the plate and the arm is locked from turning. To open the
latch the bolt must be pressed inwards or outwards before the arm can
be turned, so as to move the end of the bolt clear of the fixed stud.
To allow of the bolt being moved inwards there may be a thumbpiece
on the end of the bolt, which must be pressed inwards before turning the
arm, or the knob by which the arm is to be turned may be connected to
the bolt; or there may be a cap on the end of the arm to cover in the
end of the bolt, and the cap may have an opening for a key cut in it.
By introducing a key through the opening the bolt may be pushed
back and retained in its backward position by partly turning the key.
In order also to prevent the bolt of a sash fastener being pushed back
by an instrument passed through the space between the sashes, I form
the stump or piece which carries the hook or quadrant under which the
arm of the fastener passes, in such a manner that it shall pass across the
space between the two sashes, and somewhat overlap the plate which
carries the arm.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent
filed by the said William Stuart in the Great Seal Patent Office on
the 11th December 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
STUART, of New Hampton Road, Wolverhampton, in the County of
Stafford, Lock Manufacturer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twelfth day of June, in the year of
our Lord One thousand eight hundred and seventy-two, in the thirty-fifth
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said William Stuart, Her special license that I, the
said William Stuart, my executors, administrators, and assigns, or such
others as I, the said William Stuart, my executors, administrators, and
assigns, should at any time agree with, and no others, from time to time
and at all times thereafter during the term therein expressed, should
and lawfully might make, use, exercise, and vend, within the United
Kingdom of Great Britain and Ircland, the Channel Islands, and Islo
of Man, an Invention for "IMPROVEMENTS IN WINDOW SASH FASTENERS,"
upon the condition (amongst others) that I, the said William Stuart,
my executors or administrators, by an instrument in writing under my,
or their, or one of their hands and seals, should particularly describe
and ascertain the nature of the said Invention, and in what manner
the same was to be performed, and cause the same to be filed in the
Great Seal Patent Office within six calendar months next and imme-
diately after the date of the said Letters Patent.
NOW KNOW YE, that I, the said William Stuart, do hereby declare
the nature of the said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the
following statement thereof, that is to say :—
The object of this Invention is to construct window sash fasteners in
such a manner as to prevent the arm of the fastener being forced back
by any instrument introduced through the space between the sashes.
For this purpose I place below the arm of the fastener a thin metal plate
capable of turning on a pin carried by the arm near its outer end.
This plate, when the fastener is closed extends over and beyond the
space between the sashes, and where it passes across this space it is bent

page_text: upwards so as to stand up at that side of the arm which would have to
be pressed upon to open the fastener, and a spring extends from it along
this side of the arm and bears against the arm towards its outer end.
The bent up portion of the plate is by this spring held away from the
side of the arın. When the plate is in this position the arm of the
fastener can be turned back in the ordinary manner by the knob at its
end, but if it be attempted to force back the arm by any instrument
passed up through the space between the sashes, the instrument comes
against the plate and turns it upon its pin or axis. When the position
of the plate is thus shifted its end comes opposite to a fixed stud on the
main plate of the fastener, and thereby the arm is locked and prevented
from being turned back.
a is
Figure 1 is a plan of a window sash fastener thus constructed.
the main plate of the fasteuer carrying the arm or latch 6 in the usual
manner, and c is the horn or quadrant beneath which the arm or latch b
is passed to fasten the sashes. With these common and well-known
parts I combine the plate & with its spring d'and the fixed stud a' upon
the plate a.
The plate & is shewn at Figures 2. At dit is connected
by a pin to the under side of the arm or latch b, and at d³ the plate is
bent up so as to stand in front of the arm or latch band prevent any
instrument passed between the sashes from pressing directly against the
arm or latch. The spring d' is an extension of the part ď³, and it causes
this part of the plate to stand off from the arm or latch 6 in the position
in which it appears in Figure 1. If, however, an instrument be inserted
between the sashes with the object of forcing back the arm or latch 6,
it comes against the plate d, and the spring d' yielding the plate turns
upon its pin or axis &. The end of the plate d then comes against the
stud a' and so securely locks the arm or latch 6 and prevents it moving.
Another way in which a stud or stop on the fixed plate which carries
the arm of the fastener may be employed to prevent the arm being
turned back by an instrument passed up between the sashes is to form
a slot along the arm to receive a sliding bolt acted upon by a coiled
When the arm of the
spring in a hollow at the outer cud of the arm.
sash fastener is turned into a position at right angles to the plate which
carries it, the end of the sliding bolt comes against a stud on the plate,
and the arm is locked from turning. To open the latch, the bolt must
be pressed inwards or outwards before the arm can be turned, so as to
move the end of the bolt clear of the fixed stud.

page_text: To allow of the bolt being moved inwards, there may be a thumb piece
on the end of the bolt, which must be pressed inwards before turning the
arm, or the knob by which the arm is to be turned may be connected to
the bolt, or there may be a cap on the end of the arm to cover in the
end of the bolt, and the cap may have an opening for a koy cut in it.
By introducing a key through the opening the bolt may be pushed
back and retained in its backward position by partly turning the key.
Figure 3 is a plan of a window sash fastener constructed in this
manner. a, b, and c, are respectively the main plate, the arm or latch,
and the horn or quadrant of the fastening. The arm is shewn separately
at Figures 4; it carries the sliding bolt b¹ with its knob 6* and the spiral
spring 6, which presses the bolt outwards or away from the centre.
When the arm or latch bis so placed as to fasten the sashes, the end of
the bolt (which projects downwards) stands opposite to the stud a¹ on
the plate a, and the arm or latch bin consequence cannot be moved
until the bolt is displaced. Hence by no pressure upon the arm or
latch by an instrument inserted between the sashes from the exterior
can the windows be unfastened. But when the knob is pressed
inwards, the bolt is moved with it until its ends is able to pass the stud a¹
on the inner side, and then the arm or latch can be turned to unfasten
the sashes, or the arrangement might be altered so that the bolt should
require to be drawn outwards in order to enable it to pass the stud.
Figures 4shew an arm or latch similar to that shewn at Figures 4,
but adapted to receive a key to press back the bolt. The key is inserted
through a keyhole in a cap at the end of the arm and presses upon a stu:1
corresponding to the button b².
In order also to prevent the bolt of a sash fastener. being pushed back
by an instrument passed through the space between the sashes, I form
the stump or piece which carries the hook or quadrant, under which the
arm of the fastener passes, in such a manner that it shall pass across
the space between the two sashes and somewhat overlap the plate which
carries the arm.
Figures 5 shew the hook or quadrant e constructed in this manner.
It is formed upon a stump f, which attaches it to the plate g, and the
stump is so formed as to project over the space between the sashes, so
that any instrument which is inserted will come in contact with it, and

page_text: cannot reaⱭuy be brought to press against the arm or laten of the
fastening.
What I claim is, the construction of window sash fasteners, sub-
stantially as described.
I also claim the combination with the arm or latch of a plate or a
instrument to lock it to the main plate, substantially as described.
In witness whereof, I, the said William Stuart, have hereunto set
my hand and seal, this Tenth day of December, in the year of
our Lord One thousand eight hundred and seventy-two.