IMPROVEMENTS IN WINDOW SASH AND CASEMENT FASTENERS
Year: 1870

page_text: LETTERS PATENT to Henry James Crockett, of No. 6, Cannonby Grove,
Islington, in the County of Middlesex, Ironmonger, for the Inven-
tion of "IMPROVEMENTS IN WINDOW SASH AND CASEMENT FASTENERS.”
PROVISIONAL SPECIFICATION left by the said Henry James Crockett
+
at the Office of the Commissioners of Patents, with his Petition,
on the 7th July 1870.
I; HENRY JAMES CROCKETT, of No. 6, Cannonby Grove, Islington,
5 in the County of Middlesex, Ironmonger, do hereby declare the nature
of the said Invention for "IMPROVEMENTS IN WINDOW SASH AND CASEMENT
FASTENERS," to be as follows:-
די
The object of this Invention is to construct a window sash and case-
'ment fastener'in such a manner that it cannot be forced back from the
O outside of the window and yet so that it can
manner by the knob at the end of the arm.
be opened in the ordinary
For this purpose the arm of
the fastener has mounted upon it a sliding catch which is pressed outwards

page_text: away from the axis of the arm by means of a spring. In the quadrant,
beneath which the arm passes when the fastener is closed, a notch is
formed for the nose of the catch to enter into; this prevents the arm
being forced back from the outside. At the end of the arm is carried a
short lever, one of which is provided with a knob or handle and the other
end bears against the sliding catch which is mounted on the arm in
such manner that when the knob is drawn or pressed on in a direction
to turn the arm on its axis the short lever is first turned and its end
pressing on the sliding catch forces it back and withdraws it from the
notch in the quadrant; the arm is thus set free, and by continuing to
draw or press on the knob the arm is turned round in the ordinary
manner; a stud is provided at the end of the arm to bear against the
outer side of the quadrant in order to draw together the window sashes
when the fastener is closed.
.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said Henry James Crockett in the Great Seal Patent
Office on the 6th January 1871.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, HENRY
JAMES CROCKETT, of No. 6, Cannonby Grove, Islington, in the County of
Middlesex, Ironmonger, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Seventh day of July, in the year of
our Lord One thousand eight hundred and seventy, in the thirty-fourth
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto me, the said Henry James Crockett, Her special license, that
I, the said Henry James Crockett, my executors, administrators, and'
assigns, or such others as I, the said Henry James Crockett, 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 WINDOW
SASH AND CASEMENT FASTENERS," upon the condition (amongst others) that
I, the said Henry James Crockett, my executors or administrators, by

page_text: 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 Henry James Crockett, 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 a window sash and casement
fastener in such a manner that it cannot be forced back from the outside
of the window, and yet so that it can be opened in the ordinary manner
by the knob at the end of the arm. For this purpose the arm of the
fastener has mounted upon it a sliding catch which is pressed outwards
away from the axis of the arm by means of a spring. In the quadrant
beneath which the arm passes when the fastener is closed a notch is
formed for the nose of the catch to enter into; this prevents the armı
being forced back from the outside. At the end of the arm is carried a
short lever, one end of which is provided with a knob or handle, and the
other end bears against the sliding catch which is mounted on the arm
in such manner that when the knob is drawn or pressed on in a direction
to turn the arm on its axis the short lever is first turned, and its end
pressing on the sliding catch forces it back and withdraws it from the
notch in the quadrant. The arm is thus set free, and by continuing to
draw or press on the knob the arm is turned round in the ordinary manner;
a stud is provided at the end of the arm to bear against the outer
side of the quadrant in order to draw together the window sashes when
the fastener is closed.
13
In order that my said Invention may be most fully understood and.
readily carried into effect, I will proceed to describe the Drawings herc-

page_text: a and b are the sashes or casements.
c is the arm of the fastener; it
turns upon a pin c¹ fixed into the frame plate d which is fastened by
screws to the sash or casement a. The arm c has a projection upon it
carrying the small friction pulley c², on which the spring d¹ presses.
This spring is fixed to the frame plate d and acts in the usual way to
prevent the arm standing in an intermediate position, and to bring it to
one end or the other of the are in which it is free to move. e is the
quadrant with its plate; it is fixed to the sash or casement 6, and is of
the usual construction, except that it has a notch in it at e¹. The arm c
has a recess or hollow in it, as is seen at Figure 4, and c³ is a cover plate
fixed to the arm and closing this recess or hollow on the under side.
The arm contains within it a sliding piece f forming part of a spring
catch and having rivetted or fixed to it a bolt f¹ which locks into the
notch e¹ in the quadrant. The bolt f¹ has a stud on its under side; it
passes through a slotted hole in the top of the arm and abuts upon the
piece f. f is a coiled spring pressing the catch forward; 9 is a small
lever jointed at g¹ to the end of the arm c; it has upon it the knob g³,
and at its other end it bears upon the piece f. c* is a stud or projection
on the end of the arm c; it bears against the outside of the quadrant e
to draw the sashes or casements together.
For fasteners intended especially for casements I prefer somewhat
to modify the form of the parts, and to render them more ornamental.
In casement fasteners a spring is not usually necessary, and I
omit it.
Figure 5 is a front view of a casement fastener constructed according
to my Invention. The letters marked on this Figure and on Figure 6
indicate that the parts thus marked are similar to the parts marked in.
the same manner in Figures 1, 2, 3, and 4, Figure 6 is a front view of
a casement fastener differing slightly from that shewn in Figure 5, the
arm c in place of being itself the bar which secures one casement to
the other having a tongue c* fixed upon its axis; this tongue enters a
suitable opening or recess formed for it in a plate which is shewn at
Figure 7.
Figure 8 is a side view of this fastener. The piece e it will
be observed is in this arrangement on the same plate with the axis of
the arm c.
When to open the sashes or casements the knob g³ is moved into the
position shewn in Figure 2 the spring catch is pushed back out of the
notch e¹ by the action of the lever upon it, and then the arm is free to

page_text: be moved by the continued pressure upon the knob around its centre pin
or axis c¹.
When the arm c is moved back to fasten the sashes or casements
immediately the knob is released the catch is by its spring again projected
forward into the notch e¹ and the arm is secured in its place, so that it
cannot be moved by a knife or instrument inserted between the sashes
or casements from the outside.
Having thus described the nature of my said Invention, and the
manner of performing the same, I would have it understood that what I
claim is, the construction of window sash and casement fasteners sub-
stantially as described.
In witness whereof, I, the said Henry James Crockett, have here-
unto set my hand and seal, this Fifth day of January, in the
year of our Lord One thousand eight hundred and seventy-
one.
HENRY JAMES. CROCKETT. (L.s.)