AN IMPROVED SPRING FASTENING
Year: 1863

page_text: LETTERS PATENT to Charles Gammon, of No. 9, Cloak Lane, in the City
of London, Gentleman, for the Invention of "AN IMPROVED SPRING
FASTENING."
Sealed the 24th November 1863, and dated the 27th May 1863.
PROVISIONAL SPECIFICATION left by the said Charles Gammon at the
Office of the Commissioners of Patents, with his Petition, on the
27th May 1863.
I, CHARLES GAMMON, of No. 9, Cloak Lane, in the City of London,
Gentleman, do hereby declare the nature of the said Invention for "AN
IMPROVED SPRING FASTENING," to be as follows:-
This Invention consists in constructing an improved spring fastening,
applicable to a variety of purposes, in manner following, that is to say:-
On the front end of a spring bolt, such as is used in window sash fastenings,
I fix a spindle, and fit on this spindle a barrel, the outer surface of which is
formed with a catch or projection; this barrel carries a spring, and terminates
at top in a button or knob, whereby the barrel and with it the catch can be
partially turned or moved. The remaining part of the fastening consists of a
fixed locking plate, the fore end of which is curved, and which at the end of
the curve has a notch or nick formed in it. When the spring bolt is drawn

page_text: to make the fastening, the end of the curved plate comes in contact with the
projection on the barrel, and causes it to make a partial turn until the pro-
jection reaches the notch, when the barrel is forced back, and at the same
time the catch is engaged into the notch. To open the fastening turn the
catch out of the notch by means of the button, and push the bolt clear of the
locking plate.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Charles Gammon in the Great Seal Patent Office on the
27th November 1863.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, CHARLES
GAMMON, of No. 9, Cloak Lane, in the City of London, Gentleman, send
greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-seventh day of May, in the year of our Lord
One thousand eight hundred and sixty-three, in the twenty-sixth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Charles Gammon, Her special licence that I, the said Charles Gammon,
my executors, administrators, and assigns, or such others as I, the said Charles
Gammon, 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 "AN IMPROVED SPRING
FASTENING," upon the condition (amongst others) that I, the said Charles
Gammon, 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.
NOW KNOW YE, that I, the said Charles Gammon, do hereby declare the
nature of my said Invention, and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following
statement thereof, reference being had to the Drawings hereunto annexed,
that is to say:-

page_text: This Invention consists in constructing an improved spring fastening,
applicable to a variety of purposes, in manner following, that is to say:-
On the front end of a spring bolt, such as is used in window sash fastenings,
I fix a spindle, and fit on this spindle a barrel, the outer surface of which is
formed with a catch or projection; this barrel carries a spring, and terminates
at top in a button or knob, whereby the barrel and with it the catch can be
partially turned or moved. The remaining part of the fastening consists of a
fixed locking plate, the fore end of which is curved, and which at the end of
the curve has a notch or nick formed in it.
to make the fastening, the end of the curved
projection on the barrel, and causes it to make a partial turn until the pro-
jection reacbes the notch, when the barrel is forced back, and at the same
time the catch is engaged into the notch. To open the fastening turn the
catch out of the notch by means of the button, and push the bolt clear of the
locking plate.
When the spring bolt is drawn
plate comes in contact with the
The accompanying Drawings show my Invention applied to a window sash
fastening.
Figure 1 represents the fastening open, and Figure 2 closed.
a is a spring bolt, such as is generally used in window sash fastenings; 6 is
a spindle fixed on the bolt a; c is a barrel fitted on this spindle, and formed
on its outer surface with a catch or projection d.
The arrangement of the spindle and barrel will be better understood by the
detached view, Figure 3, and horizontal section, Figure 4. The barrel carries
it.
a spring e, and terminates at top in a button or knob f, whereby the barrel
and the catch with it may be moved. g is a fixed locking plate on the lower
sash, curved at its fore end, as shewn, and with a notch or nick h formed in
When the spring bolt a is drawn forward to make the fastening, the end
of the plate g comes in contact with the projection d, and causes the barrel c
to make a partial turn until the projection d reaches the notch h, when the
barrel is forced back by the spring e, and at the same time the projection d is
engaged into the notch. To open the fastening it is only necessary to turn
the projection d out of the notch by means of the button f, and to push the
bolt a free of the locking plate g.
Although I have only shewn my improved spring fastening applied to
window sashes, yet it is, as before stated, applicable to a variety of
purposes.
And having now described the nature of my said Invention, and in what
manuer the same is to be performed, I declare that I claim constructing spring

page_text: fastenings substantially as herein-before described, and illustrated in the
accompanying Drawings.
In witness whereof, I, the said Charles Gammon, have hereunto set my
hand and seal, this Twenty-seventh day of November, One thousand
eight hundred and sixty-three.