AN IMPROVED FASTENER FOR WINDOW SASHES AND CASE, MENTS.
Year: 1873

page_text: LETTERS PATENT to Frank James Pearce, of Brixton, and Charles
Coffyn Pearce, of Godalming, both in the County of Surrey, for the
Invention of "AN IMPROVED FASTENER FOR WINDOW SASHES AND CASE,
MENTS.'
"
Sealed the 20th January 1874, and dated the 26th July 1878.
PROVISIONAL SPECIFICATION left by the said Frank James Pearce
and Charles Coffyn Pearce at the Office of the Commissioners of
Patents, with their Petition, on the 26th July 1878.
We, FRANK JAMES PEARCE, of Brixton, and CHARLES COFFIN PEARCE,
of Godalming, both in the County of Surrey, do hereby declare the
nature of the said Invention for "AN IMPROVED FASTENER FOR WINDOW
SASHES AND CASEMENTS," to be as follows:—
Our Invention relates to an improved construction of window sash
and casement fastener which is designed to afford better security against
any attempt to unfasten the window from the outside. The latch bolt is

page_text: •
made much the same as usual, except that it is provided with a box or
recess round its pivot containing a spring which tends to throw back the
bolt to the unfastened position. The staple or catch on the front
meeting bar of the sash consists of a plate mounted on a vertical pivot
so as to oscillate horizontally. This catch plate is mounted on a small
box containing a spring, against which abuts a lever arm or stud fixed
beneath or to the under side of the catch plate and moving therewith.
That part of the catch under which the bolt passes is so curved that on
drawing forward the bolt the catch will be oscillated or forced back until
the bolt arrives opposite a notch in the catch, whereupon the latter
springs forward and engages the bolt in the notch, and so locks it, the
notch being of such depth that the bolt cannot be thrown back without
first disengaging it from the notch by pressing against a knob and oscil-
lating the catch plate.
SPECIFICATION in pursuance of the conditions of the Letters Patent, 1
filed by the said Frank James Pearce and Charles Coffyn Pearce
in the Great Seal Patent Office on the 26th January 1874.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, FRANK
JAMES PEARCE, of Brixton, and CHARLES COFFYN PEARCE, of Godal-
ming, both in the County of Surrey, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-sixth day of July, in the
year of our Lord One thousand eight hundred and seventy-three, in the
thirty-seventh year of Her reign, did, for Herself, Her heirs and suc-
cessors, give and grant unto us, the said Frank James Pearce and Charles
Coffyn Pearce, Her special licence that we, the said Frank James Pearce
and Charles Coffyn Pearce, our executors, administrators, and assigns, or
such others as we, the said Frank James Pearce and Charles Coffyn
Pearce, our 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 "AN
IMPROVED FASTENER FOR WINDOW SASHES AND CASEMENTS," upon the condition

page_text: (amongst others) that we, the said Frank James Pearce and Charles
Coffyn Pearce, our executors or administrators, by an instrument in
writing under our, 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.
NOW KNOW YE, that we, the said Frank James Pearce and Charles
Coffyn Pearce, do hereby declare the nature of our 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 'Sheet of Drawings and to the letters
and figures marked thereon (that is to say) :-
-
. Our Invention relates to an improved construction of window sash
and casement fastener, which is designed to afford better security against
any attempt to unfasten the window from the outside. The lever bolt
is made much the same as usual, except that it has a spring which tends
to throw it back to the unfastened position. The staple or catch on the
front meeting bar of the sash consists of a plate fitted to move on a
vertical pivot on a small box containing a spring, against which abuts a
lever arm or stud fixed beneath or to the under side of the catch plate
and moving therewith. That part of the catch under which the bolt
passes is so curved at the front edge that on drawing forward the bolt
the catch will be oscillated or forced back until the bolt arrives opposite
a notch in the catch, whereupon the latter springs forward and engages
the bolt in the notch, and so locks it, the notch being of such depth
that the bolt cannot be thrown back without first disengaging it from
the notch by pressing against a knob and oscillating the catch plate.

page_text: g
a is the plate on which the lever bolt 6 is pivoted, and c is the catch
plate. The bolt 6 turns on a pin d rivetted to the plate a, as shown, and
provided with a washer e. The lever bolt 6 is formed with a box ƒ to
contain a spring 9 coiled round pivot d, and fastened at one end to the
bolt 6 and at the other to the plate a. This spring serves to throw back
the bolt when released from the catch, but the spring may be otherwise
arranged or dispensed with, and the bolt be pushed back by hand if
preferred. The bolt is provided with a projection or lug b', which takes
into a notch in the catch. The catch plate c is cast with a box h,
upon which is fitted the catch i to oscillate horizontally to and fro on a
pivot at k. The catch i is curved at the front edge eccentrically. to the
are in which the bolt moves, so that on drawing forward the bolt the
lug 6¹ comes in contact with the said curved edge and forces back the
nose of the catch i until it comes opposite the notch j in the catch, when
the latter springs forward, and the notch embracing the lug 6' firmly
secures the bolt. This catch i is fixed on the squared part of a short
pivot turning in a socket in the cover of box h. I is a lever in said box
fixed on or forming part of the same pivot, and therefore moving with
the catch i, so that as the nose end of the latter swings backward the
other end, and with it the lever 1, will move forward, and vice versa.
Within the box h is also contained the spring m, which bearing against
the front of lever 7 tends to press the catch forwards as above mentioned.
n is a knob fixed on the catch i, which knob is pulled forward to throw
back the catch, as shown in dotted lines in Figure 4, and release the
bolt, the latter being then returned to position by its spring or by hand,
as the case may be.
a
Instead of lever there may be a stud p for spring m to press against
on the under side of the catch i, see Figure 5, the stud working through
a slot q in the top of box h. In this case catch i would be pivoted on a
pin riveted to the top of the box h.
Having described the nature of our Invention and the manner of
newforming the same, we declare that what we claim as
Our Invention to

page_text: and containing a spring acting on the said catch, all substantially as
shown and described for the purpose specified.
In witness whereof, I, the said Frank James Pearce, for myself
and on behalf of the said Charles Coffyn Pearce, have hereunto
set my hand and seal, this Twenty-first day of January, in the
year of our Lord One thousand eight hundred and seventy-four.