IMPROVEMENTS IN APPARATUS FOR THE FASTENING OF WINDOWS
Year: 1875

page_text: LETTERS PATENT to Thomas Charles Sorby, of No. 27, Brunswick
Square, in the County of Middlesex, Architect, for the Invention
PROVISIONAL SPECIFICATION left by the said Thomas Charles Sorby
at the Office of the Commissioners of Patents, with his Petition,
on the 23rd September 1875.
I, THOMAS CHARLES SORBY, of No. 27, Brunswick Square, in the.
3 County of Middlesex, Architect, do hereby declare the nature of the
said Invention for "IMPROVEMENTS IN APPARATUS FOR THE FASTENING OF
WINDOWS," to be as follows:-
The Invention is particularly applicable to the fastening of windows
of large size, and in which the ordinary window fastener is not readily
accessible; but the Invention is also applicable with corresponding
advantages to other windows.

page_text: According to my Invention the fastening of the sashes is effected by
a locking bolt or latch applied to one sash, being capable of locking into
a rack or bolt holes or recesses formed in or applied to the other sash;
or one part of this fastener may be applied to the sash, and the other
to the sash frame. This locking bolt_has a tendency given to it for its
locking end to be forced outwards by spring or otherwise, and it forms
part of or is withdrawn by a lever operated by a cord or rod or other
connector.
The releasing cord. or rod or connector is provided with catches or
stops or other locking means to hold the bolt correctly released when
desired.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Thomas Charles Sorby in the Great Seal Patent
Office on the 22nd March 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, Thomas
CHARLES SORBY, of No. 27, Brunswick Square, in the County of Mid-
dlesex, Architect, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-third day of September, in the
year of our Lord One thousand eight hundred and seventy-five, in the
thirty-ninth year of Her reign, did, for Herself, Her heirs, and suc-
cessors, give and grant unto me, the said Thomas Charles Sorby,
Her special license that I, the said Thomas Charles Sorby, my
executors, administrators, and assigns, or such others as I, tho said
Thomas Charles Sorby, 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 Ireland, the Channel Islands, and

page_text: Figure 1 shows by front view, Figure 2 by side sectional view, and
Figure 3 by sectional plan an arrangement of apparatus according to
my Invention.
In each of the views the same letters indicate corresponding parts.
a represents a portion of the upper sash, and a portion of the lower
sash, and c the sash frame; d the locking bolt, which by being con-
stantly borne upon by the spring e has a tendency for its outer end d'
to be forced outwards, and when opposite to any suitable opening as a
rack or bolt hole to lock therein. The bolt d, and parts acting thereon,
are as shown applied to the lower sash b, but this may be varied. f is a
plate affixed as shown to the upper sash a with openings therein to
receive the end d¹ of the bolt d; the upper part f of this plate is also
inclined to facilitate its passing the end d¹ of the bolt d.
According to the arrangement shown the bolt d is witdrawn from a
hole or opening for other suitable opening by means of the lever g,
which is supported to turn on the axis g', and at one end g² bears
against a projection d from the side of the bolt d, whilst the other end
is connected by pin joint at 9³ to a rod h, or it may be to other suitable
cord or connection formed so as to hold the bolt a released when so
desired; but the form of the bolt and of the spring, or the means of
applying it, or other means by which the tendency is to keep the bolt
shot or in the position for bolting may be varied.
The locking means shown applied to the rod h for holding back the
bolt & is formed by the stem i being capable of sliding and turning in
the fixed socket j, the sliding or turning being effected by means of the
stud . The socket is also formed with a notch j³, in which the stem of
the stud is capable of sliding.
In order to draw back the bolt d it will simply be necessary to draw
the stem i downwards by the stud i¹, and to hold that bolt d so drawn
to turn the stem i, so that its stud i may rest under the edge of the
socket j, as indicated by the dotted lines and Figure 4.
Having thus described the nature of my said Invention, and means
which I adopt in carrying the same into effect, I would have it under-

page_text: stood that I do not confine myself to the precise arrangement of parts,
as shown and described, as the same may be varied without departing
from the peculiar character of my Invention; but what I do claim is,
the arranging, combining, and operating parts forming apparatus for
fastening windows by locking or bolting, as described.
In witness whereof, I, the said Thomas Charles Sorby, have here-
unto set my hand and scal, this Twentieth day of March, in
the year of our Lord One thousand eight hundred and seventy-
six.
THOS. CHA³. SORBY. (L.S.)