IM• PROVEMENTS IN SASH FASTENERS
Year: 1875

page_text: LETTERS PATENT to William Smith, of Kennington, in the County
of Surrey, Gas Meter Manufacturer, for the Invention of "IM•
PROVEMENTS IN SASH FASTENERS."
Scaled the Sth February 1876, and dated the 12th August 1875.
PROVISIONAL SPECIFICATION left by the said William Smith at the
Office of the Commissioners of Patents, with his Petition, on the
12th August 1875.
I, WILLIAM SMITH, of Kennington, in the County of Surrey, Gas
Meter Manufacturer, do hereby declare the nature of the said Inven-
tion for "IMPROVEMENTS IN SASH FASTENERS," to be as follows:-
This consists in the employment of a lever or stop having its fulcrum
in the catch of the fastener, for which purpose the catch is curved or
somewhat rounded and raised at its outer end with an aperture in same
to receive the said lever or stop.
The arm of the bar which passes under the catch is preferably made
in the usual manner, but by my Invention I am able to dispense with
the use of a long spring and friction roller.

page_text: To secure a fastener made according to my Invention the knob is
pushed over in the ordinary way, which coming against the lever or stop
raises same and is carried on under the catch; immediately the bar has
passed the lever or stop the latter falls and the bar cannot be brought or
pushed back until the lever or stop is again raised. An india-rubber or
other spring may be used to draw the bar back immediately the lever or
stop is raised, while at the same time it keeps the bar up against the
lever or stop.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Smith in the Great Seal Patent Office on
the 12th February 1876.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
SMITH, of Kennington, in the County of Surrey, Gas Meter Manu-
facturer, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twelfth day of August, 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 successors,
give and grant unto me, the said William Smith, Her special licence
that I, the said William Smith, my executors, administrators, and
assigns, or such others as I, the said William Smith, 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 Isle of Man, an Invention for "IMPROVEMENTS IN
SASH FASTENERS," upon the condition (amongst others) that I, the said
William Smith, 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 immediately after the date of the said Letters
Patent.

page_text: that, the said wiiniam smith, do hereby declare
the nature of my said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in and by
the following statement, reference being had to the accompanying
Drawings and to the letters of reference marked thereon, that is to
say :-
My Invention consists in the employment of a lover or stop having its
fulcrum in the catch of the fastener, for which purpose the catch is
curved or somewhat rounded and raised at its outer ends with an
aperture in same to receive the said lever or stop.
The arm of the bar which passes under the catch is preferably made
in the usual manner, but by my Invention I am able to dispense with
the use of a long spring and friction roller.
Figure 1 of the accompanying Drawings is a side elevation, and
Figure 2 is a plan of a sash fastener constructed according to my Inven-
tion, showing the same unfastened, and illustrating one arrangement
whereby my Invention may be carried into effect.
a is the long arm of lever, tumbler, or stop; b, the fulcrum thereof;
and c, the short arm. e is the catch of the fastener preferably curved,
as shown, to allow for the motion of long arm a; f is bar and f¹ knob
as usually made, and having spring at back if desired.
To secure a fastener made according to my Invention the knob f¹ is
pushed over in the ordinary way, thereby causing the bar f to come
against the long arm a of lever, tumbler, or stop, and to raise same, the
bar being further carried on under the catch e of the fastener.
Immediately the bar fhas passed the arm a of lever tumbler or stop the
latter, viz., arm a falls, and the bar fcannot be brought or pushed back
until the arm a is again raised by pressing on arm c.
The full lines show the fastener open; the dotted lines show the same
closed and secure. 9 represents a flat spring for keeping the bar close
up against the arm a, and for drawing the bar f back to its open
position, as shown by the full lines in Figure 2, as soon as the said barƒ
is released by the raising of the arm a; this spring may however be
used or dispensed with as preferred. When dispensed with the short
arm c is depressed by finger, thereby raising the long arm a and allowing
the bar to be passed back by knob f. When the spring g is used as

page_text: soon as the arm e is pressed down and arm a raised the spring draws the
barf back.
Figure 3 is a view in vertical section, and Figure 4 in plan of a
fastener made in a similar manner to that before described, but showing
an india-rubber spring instead of a flat metal spring. This spring
acts in a similar manner to the other, and in the Drawings (Figure 4)
the full lines show the spring stretched, and the dotted lines show it
contracted. The action of this fastener is precisely similar to that
before described, and I have marked corresponding parts with the same
letters as those before used in the previous Figures.
Having now described the nature of my said Invention, and in what
manner the same is to be performed, I declare that without limiting
myself to the precise shape and arrangement of the parts shown and
described, I claim, the employment in sash fasteners of a lever tumbler
or stop, as described, in combination with catch e and barf, and with or
without spring, all constructed and operating substantially in manner
and for the purposes described and illustrated in the accompanying
Drawings.
In witness whereof, I, the said William Smith, have hereunto set
my hand and seal, this Tenth day of February, in the year of
our Lord One thousand eight hundred and seventy-six.