Improvements in Window Fasteners.
Year: 1887

page_text: Date of Application, 12th July, 1887.
Specification Accepted, 30th Aug., 1887.
[Communicated from abroad by REUBEN CLARKE and WILLIAM FERGUSON MUNRO,
Accountant, both of the City of Toronto, Canada.]
Improvements in Window Fasteners.
I, ALFRED JULIUS BOULT of 323 High Holborn, in the County of Middlesex,
M.I.M.E. do hereby declare the nature of this invention and in what manner the
same is to be performed, to be particularly described and ascertained in and by the
following statement:-
-
The object of the invention is to make a window fastener which is simple in
construction and when set will hold the sashes firmly closed and which will also
permit the sashes to be opened a few inches for the purpose of ventilation rendering
it impossible to open the window sashes wider so as to admit of ingress to the house
from the outside without first closing the sashes and resetting the fastener into such a
position that the sash may be thrown up.
Figure 1 is a perspective view of part of a window frame and sashes partially
broken away showing the portion of the window fastener which is let into the window
frame; the catches a and b being in such a position as to permit the sashes to be
freely opened.
Figure 2 is a side elevation of part of a window frame, and showing the catches a
and 6 in such a position as to lock the sashes and hold them closed.
Figure 3 is a side elevation of part of a window frame showing catches a and b in
such a position as to permit of the sashes to be opened for a few inches.
Figure 4 is a perspective view of the corners of the window sashes where this
window catch is applied showing the stop grooves formed in the sashes.
Figure 5 is a detail showing the mechanism which actuates the catches.
Like letters of reference indicate similar parts in the different figures.
In figure 1A is the thumb piece which passes through the lower sash slat G into
the box H which covers the mechanism which operates the catches a and b which
work in slots a¹ and b¹ formed in said box. This box H is let into a recess formed
TD 077

page_text: in the side frames the strip D being cut through for this purpose, the surface of the
box H being flush with sides of grooves in which the sashes slide.
B is the lower sash with corner broken away to exhibit the window fastener.
D is the strip between the sashes B and C which is usually let into a groove of side
frame and in the line of this strip the catches a and b rest when in position to permit
of the sashes being moved freely as shown in this figure.
In this view the flat portion of the thumb piece A is in a horizontal position.
In figure 2 the dotted line C shows the position of the top of lower sash B and the
dotted line d the position of the lower side of the upper sash C. In this view the
sashes are shown locked or closed; the thumb piece A being slightly turned and
the catches a and b moved slightly away from each other from the line of slat D the
catch a engaging with the side e of the stop groove E in the slot formed in the lower
portion thereof and the catch b in a similar manner engaging with the sides f of the
stop groove F in the slot formed in the upper portion thereof as fully shown in
Figure 4. In this view the dotted lines indicate the position of the stop grooves E
and F of their sides e and f which butt against the stops a and b when in the slots
formed in said sides and locking the sashes.
In figure 3 the dotted lines c and d marking the top and bottom of the lower and
upper sashes indicate that the sashes are slightly open for the purpose of ventilation
but not to such an extent as to permit of a person getting through the window. In
this view it will be noticed that the thumb piece A is still more turned and that the
catches a and b are still more separated from their original position when the sashes
are free to move as shown in Figure 1. By this extra turn of the thumb piece A the
catch a is caused to pass from the slot formed in the side e and enter the groove in
the stop groove E passing to the top of said groove when the upper sash C is opened
or let down to the distance permitted by said groove and the stop b in a similar
manner passes the side fin the stop groove F and enters the groove formed in said
stop groove running to the bottom thereof when the under sash B is raised to the
distance permitted by said groove:-the catches a and b striking the top and bottom
of the respective stop grooves formed in the sides of the upper and lower sashes. By
referring to figure 4 the foregoing explanation as to the motion of the catches a and b
in the stop grooves which lock and control the opening of the sashes as may be
desired is fully illustrated.
Figure 4 shows the stop grooves E and F placed in position near the corners of the
upper and lower sashes which are recessed to receive them. 2 and 3 indicate the
position of the slots through which the catches a and b pass when entering the grooves
7 and 8 formed in the stop grooves E and F and also the shoulders at the corners of
the sides e and in which the catches a and b engage when the sashes are locked.
The dotted lines indicate the position of the box H when let into position in the side
frame of the window.
Figure 5 is a detail showing the mechanism which operates the catches a and b and
which is covered by the box H which is let into the side of window frame.
I is the end of spindle which is adapted to turn in a bearing formed in the box H
and is attached to the thumb piece A; the squared end of this spindle passes through
and is rigidly secured to the notched quadrant piece K.
L is a bar attached to or forming part of the catch 6 and having a pin 1 formed
thereon which fits into the slot 1' formed in said quadrant and M is another bar on
the opposite side attached to or forming part of the catch a which is adapted to move
in the slot a¹. The slot b¹ in which the catch moves is on the other side and not
shown. m is a pin formed on said bar M which fits into a slot m¹ in said quadrant.
nn are guides formed in said bars L and M to receive the enlarged head o of the
pin O. The end of the head o is bevelled off to an edge which fits into the notches
4, 5 and 6 formed in the quadrant and N is a spiral spring surrounding the pin O
and bearing against the enlarged head o and the slotted bearing piece p. The slot q
formed in this bearing piece p permits of play for the pin as it is pushed in by the
action of the revolving quadrant or thrown in the opposite direction by the action of
the spring N.

page_text: When the enlarged head o rests in notch 4 the catches a and b are in a position in
a line with the slot d Figures 1, 2 and 3 to permit of the window being freely opened
without engaging with the catches. When the head o is moved into the notch 5 the
catches a and b are set to lock the sashes and when the head o is in the notch 6,
the catches a and b are moved into such a position in their slots a¹ and 6' as to permit
the catches to enter the grooves in the stop grooves E and F and allow of a partial
opening of the window.
The window catch makes a click as the end of the pin O is thrown by the spring N
into the notches in the quadrant which sound will indicate to the person moving the
thumb piece that the catches a and b are in proper position to act.
In this figure 5 the back of the box H has been removed so as to have the interior
exposed. It is of course closed and screwed in position when the window catch is in
place.
From the foregoing description in this specification it will be seen that when the
window sashes are partially open as shown in Figure 3 it is necessary in order either
to lock the sashes or to throw them freely open, to close them and then after the
sashes are closed to reset the catches a and b by means of the thumb piece A.
Having now particularly described and ascertained the nature of the said invention
as communicated to me by my foreign_correspondent and in what manner the same
is to be performed I declare that what I claim is :-
1. The combination of the box H having a slot formed therein the spindle I the
notched quadrant K the bar L carrying a catch and a pin which enters a slot formed
in said quadrant and having a guide for the enlarged head of the pin O which is
actuated by the movement of said quadrant and the spring N which has bearings on
said pin and the slotted end of the bearing piece p substantially as specified.
2. The combination of the box H the spindle I carrying a thumb piece the notched
quadrant K the bar L and the bar M pivotally connected with the said quadrant and
adapted to move the catches a and b in opposite directions when actuated by said
quadrant in slots formed in said box H and provided with guides for the head of the
pin O which is so formed as to enter the notches in said quadrant as it is caused to
rotate and the spring N having suitable bearings and adapted to keep the head of the
pin pressed into the notches on the quadrant substantially as described and for the
purpose specified.
3. In combination with a window frame and sash a box let into the side of the
window frame and provided with mechanism adapted to move in a slot formed in said
box, a catch which is fitted to engage in suitable bearings provided by a stop groove
formed in the window sash substantially as described and specified.
4. In combination with a window sash a stop groove F rigidly attached to said
sash in a recess made therein at one of the corners and having a slot 3 so formed as
to admit of a catch & engaging therein when actuated by mechanism let into the side
of the window frame and locking the sash substantially as specified.
5. In combination with a window-sash a stop-groove F-rigidly attached to said
sash in a recess made therein and having a slot 3 and groove 7 so formed as to admit
of a catch 6 passing into said groove and engaging at the end thereof when said
catch bis actuated by mechanism let into the side of the window frame and locking
said sash after it has been partially opened substantially as specified.
6. In combination with a window frame and sashes the box H with mechanism
adapted to operate the catches a and b and the stop grooves E and F which afford
suitable bearings for the catches a and b so as to lock in position the sashes B and C
substantially as described and specified.
7. The box H let into a window frame the spindle I notched quadrant K the bar L
and the bar M pivotally connected with said quadrant and adapted to move the
catches a and b in opposite directions when actuated by said quadrant and provided
with guides for the head of the pin O which is so formed as to enter the notches in
said quadrant as it is caused to rotate and is held therein by the action of the spring N
in combination with the stop groove E let into the upper sash and the stop groove F

page_text: let into the lower sash and having slots 2 and 3 and grooves 7 and 8 which afford
suitable bearings on which the stops a and b may engage when moved into position
by the thumb piece A formed on the end of said spindle I so as to lock the sashes B
and C in the required position substantially as specified.
8. An adjustable window fastener formed on the window frame and having catches
adapted to engage in suitable bearings formed on the sashes in such a manner that
when the window fastener is set to permit of the sashes being partially opened it is
necessary to close the same from the inside before resetting the fastener when it is
desired to throw the sashes up to their full extent and permit them to move free from
the catches substantially as described and specified.